1.) That "pop-pop-pop" sound means, that the engine hit its limiter. Limiters are used so the engine doesnt go to dangerous RPMs that could damage the engine or some other components down the line. Its set up in the software of the cars computer (ECU). Since it was in the air, there was no drag/friction from the ground below and the driver was still on the throtle on full, pedal to the metal, so the engine kept reving up...up to the limiter. 2.) The other pop-pop-pop is different. The cars are set up that the ignition of the fuel is delayed. That means on the 4th stroke, when the piston supose to push out the burnt fuel (smoke) -> the valve opens for that. But since its delayed, the fuel burns while the valve is open, and the fuel doesnt burn only in the combustion part, it also still burns on the outtake. It is done so, because it causes higher pressure, and that higher pressure of burnt gases helps the TURBO be still spooled up in high RPMs, which helps the engine to have high power on lower Engine RPMs and gives even more power on high RPMs. Since its so fast, sometimes the fuel doesnt burn in the combustion chamber, nor in the outtake manifold, it can travel more down the line in the exhaust pipe. Since the exhaust pipe is also hot, the fuel will touch it eventually and that heated pipe will make the fuel burn. And THOSE are the pops you hear. When you see cars that spit fire from their exhausts, this is it...delayed burn....althougth some people over-do it and its spitting too much flame and bork their cars. Rally cars, or modified cars that want to implement this, need to install better, beefier outtake manifolds, exhaust pipes and other components, so they can withstand the higher pressure and higher heat, since the fuel doesnt only burn in the combustion chamber. 3.) So both of these intertwined. Since he was up in the air, he hit the limiter....thats why the pops are so consistent. You can also hear/see these when they are switching down to lower gear, which means the RPMs go up, which means more combustion( or the lack there of), more pop-pop and spitting fire from the exhaust. 4.) Rally cars a built different. They have sooooo many hardened parts of it, tubes that stiffen the whole car. This helps when racing since they need to endure the tortute/abuse they go through. And its also for the safety of the crew. Like the fuel tank. It has to be a box from hardened metal, so not even in a very bad accident, they wont leak and cause fire. 5.) At @1:55 to @1:57 , you see that the hammered into into the bridge rails, and the bridge rail when through the windshield and almost hit the head of the driver. I similar thing happened last year too. A driver hit a bridge rail that was made out of tree logs, and hit the driver and the driver died to severity of his injury. 6.) The drivers are insane. They can go up to around 200 - 220 km/h ( 124 - 136 mil/h ).
The only thing I'd correct is how antilag works. If it's been setup correctly you aren't getting unburnt fuel igniting further down the exhaust. You want the ignition event to still begin within the cylinder but with the exhaust valve open so the fuel burns and the gas expands out into the turbo turbine housing. This is what keeps it spinning within it's desired operating range under a zero-throttle condition. If the fuel isn't burning until well after the turbine then it's completely wasted and you're throwing it away for nothing. It also doesn't make any more power than a system without antilag. All it does is reduces the intake system inertia when the driver gets back onto the throttle again so that he regains power faster. It's a driveability improvement not a power one.
They flip the car at corners and then turn into the corner. Would think the science would to keep the car going straight through the corner so maximum traction and speed.
@@AnthonySinclair-Wellings It's called a Scandi flick. You turn the car away from the corner then turn the car quickly into the corner. Doing this shifts the weight of the car's rear end allowing it to step out and rotate faster. It's good for tight corners.
@@Fez135 the same way when you are at full throttle, and you put the gearbox down a gear or even two because of this, the fuel comes out before the explosion, the exposure follows in the exhaust
@@tihomirrasperic Not really. If you're getting any flames at all it's normally down to things like valve/port overlap, or in older cars with carburretors because you have less control over fuelling and you're getting more fuel than can be burned with the throttle closed so there's leftover fuel that will ignite in the exhaust. Those things aren't desirable though. Antilag is a specific technique where the fuel is still ignited in the cylinder using the spark plug, it's just done about 180-360 degrees late during the exhaust stroke instead of at the end of the compression stroke. The throttle is also bypassed to ensure that the the fuel has enough oxygen to burn.
The main reason is, that American car chases are usually filmed at very low speeds, whereas car chases in Europe are filmed at high speed. When the Americans do high speed, it's just sped up video or CGI and it doesn't look realistic in either case.
Fuel mapping to still feed fuel whilst off throttle to keep the turbo spinning ready for when you full throttle. The pop pops are from unburnt fuel igniting when exiting the exhaust as air is introduced to the unburnt fuel.
With rally cars the popping sound is anti-lag the car pumps more fuel causing fuel build up in the exhaust causing a flame and popping sound that also creates back pressure to the turbo to keep it spinning when your foot is not on the throttle
Its not that it increases fuel, but it cuts ignition while still spraying full as if full throttle (or close to) and every now and then a cylinder fires just to keep rpms up
In this case, it's the rev limiter kicking in though. Driver says on the gas while in the air, causing revolutions to go up and hit the ceiling. The pop-pop sounds are basically intermissions between 2 states; state 1 fuel is being supplied and ignition also (normal operation). State 2: Rev limiter preventing fuel injection to prevent the engine from "overspeed".
Hi there are several reasons for the funny sounds: 1. the Rev Limiter, when fuel is cut off in order to prevent the engine from revving higher; 2. The Turbo Wastegate. When the Turbo reaches maximum allowed boost pressure, the pressure works against a spring loaded valve, which then opens and releases the air, instead of pushing it into the engine. That's the "pop off" like sound 3. In order not to loose too much "pulling force" of the engine while chagning gears, the cars just cut off ignition, and making the sparkplugs "hot" (giving them electricity) again when the new gear is inserted. This forces unburned fuel into the exhaust system, where it is burned afterwards, hence the explosion sound coming from the exhaust and the flames coming out at the rear. So rally is quite spectacular to éyes and ears! Greets from Austria! And yes, i am "i have been watching Group B" in my 20ies years old!😊
6:32 "now that's a rally car",😂 yes indeed, you could argue that is THE rally car , the most impactfull and most famous for sure, = the group B. Audi quatro
Hi there, i think you're almost right. Why "almost"? Yes the "short" QUATTRO S1 EVO II beeing driven by Walter Röhrl and Stip Blomqvist may be one of the most iconic cars of the time. But it came a little to late. According to my opinion the Lancia Delta S4 and the Peugeot 205 Turbo 16 have been more competitive and won more Rallyes. While the most successful AUDI was the predecessor of the S1 , the longer QUATTRO "A2", beeing driven by Michele Mouton for example..
Good guess :) Yes, that is Swedish. "Djävlar" is a curse word mostly used when being impressed by something. Sidenote: "Djävla" without the r is very negative and mostly destructively used. Don't ask why the r is used that way for this word. Normaly it indicates doing something or plural depending on context
Yeah, really good guess 👍And thanks for the explanation. I'm Danish, and our languages are very similar, but I never knew the difference between Djävla and Djävlar ☺
I once went to a charity event at Silverstone circuit and with my husband and son got the chance to be driven around by a rally driver in a rally car. It was a white knuckle experience!! Never again.
@@tattoodude8946 It's the exact opposite. That sounds is the anti-lag system designed to maintain turbo pressure when the driver lifts off the throttle, minimizing turbo lag and ensuring continuous power when he lands.
Nope, it's the anti-lag system designed to maintain turbo pressure even when the driver lifts off the throttle, minimizing turbo lag and ensuring continuous power.
I believe the crackle sound is from the anti-lag system on the turbocharger. When the engine is not near full throttle, a little bit of fuel is added to the exhaust which combusts in the exhaust, causing repeated backfires, but also keeping the turbo speed up. I may be wrong.
Hello man! During the flight, due to the fact that the wheels no longer have grip/traction, the engine reaches maximum revs, in limitation. When it comes to braking periods, that's where the ALS (anti-lag system) intervenes. This system, through a valve, allows fresh air to reach the exhaust manifold directly. This fresh air interacts with the burnt gases rich in unburned fuel and results in combustion, only at the level of the exhaust manifold. This combustion in the exhaust manifold eliminates the fact that the engine must be revved to generate the exhaust pressure required for the turbine. The engine drops quietly from high revs, and the exhaust pressure, necessary to keep the turbine in revs, is produced only by combustion in the exhaust manifold and not by high engine revs. So practically during the braking periods, that noise is exhaust noise more often, produced by the combustion in the exhaust manifold, while the one during jumps, is still an exhaust noise, but less often and produced due to the engine reaching maximum revs.
Only once have I seen these guys live and that was at Kielder Forest years ago and I knew then that these guys are the most talented, bravest drivers in motorsport.
WHat you said first is absolutly correct. It's called a flick or pendulum and used to baslically let the rear give you the tankslapper you need for a perfect rotation, while making the fronts bite and transfering the slide to the rear of the car and in general making the turn a little longer, so the apex moves 'forward' in your favor and you can be on the throttle before it, whats essential to havee a straight and gripping exit. Good eye to get all that by watching ;) Secondly, snow is just a dream to drive a rally car on - no stress at all, its like a day on the beach :) The pop-pop (also good analysis that reminds me on ping ping from solar opposites^^, it's called pop off -and waste gate^^) are to control the turbo pressure a little and give you some anti lag while getting rid of overpressure, the rest is just exploding gas and oilrests in the glowing hot exhaust. What happened to the car that fell apart, doing jumps and drifts over stones and bumps all day i think is self explainatory.. it fell apart :) I'd put tht one on too big spacers for the fronts, so they are as wide as possible to prevent understeering in that amatuer FWD, what releases froces that car simply isnt built for.
This sound is called ALS. The turbocharger needs exhaust gases to spin, so when you take your foot off the gas pedal, the system injects fuel that doesn't burn in the engine but in the exhaust. This way, despite the engine RPMs dropping, larger amounts of exhaust gases are produced, which maintain the appropriate turbo speed.
@@Samantha23478 The exhaust gases are fed back round into the exhaust side of the turbo, spinning the turbo to compress the cold air in the inlet side of the turbo to create more dense clean air to use in combustion.
@@Samantha23478sorry but that's not right. There's 2 side of a turbo, one side being driven by exhaust gases so that the other side can suck in air and force it back into the intake. Also it doesn't push cold air into the engine, it's actually pretty hot as a result of the exhaust runnig trough it and the turbo spinning at very high rpm, thats why you need an intercooler to cool that hot air down again as much as possible
If it's in the air the sound is the rev limiter cutting and re-engaging the ignition. If it's still on the ground (usually in tight turns) the driver has lifted his foot and the anti-lag system injects fuel into the turbo to keep it spinning fast allowing full power to be available instantly when the driver gets back on it.
These cars are usually built specifically for this. The frames are heavily reinforced. A strong roll cage is fitted and the suspension parts are designed to take punishment like that without breaking. Almost nothing on these vehicles came from a 'normal' street car. When the car is in the air that "pop pop pop" is the engine hitting it's maximum allowed spinning speed (rev limiter). Because it's off the ground the wheels have nothing to grip so they spin really easily maxing out the rev's. This can also happen while on the ground but usually only when accelerating very hard in lower gears and not changing up soon enough. The one on the ground (about 5:40) you pointed out could also have been engine 'crackle'. When they brake really hard the engine slows down really quickly so not all of the fuel mixture going into the engine burns properly and passes straight through the engine into the exhaust system. Because the engine is being worked so hard the exhaust pipes are glowing red hot and this ignites the unburnt fuel creating those crackles and bangs.
1:18 That noise is from achieving max RPM (an electronic switch cuts the motor to prevent failure) and usually happens in mid air because drivers don't lift the foot from the accelerator and the lack of friction in the wheel allows to hit max almost instantly.
the pop bang is antilag, the heat from the exhaust manifold keeps the turbo spinning even tho you're not pressing the accelerator, but when you do the turbo is spinning ready to go....and technicaly you only need to see like half of where you're going if you got a good co-driver, rally, moto cross and dakar thats probably the top 3 of driving sports
10:05 My home town rally! Happened last year, no one got injured (it was so close to not being that way). Peugeot 208 Rally4 had, for the better part of a mile tailing the Suzuki Swift N5 waiting for the Suzuki to let him by, as rules say. Clearly done with the Suzuki not moving aside before in a zone where he could've, the Peugeot's driver sees the Suzuki move and goes for it, but inmeadiatley after that corner there's a VERY narrow tunnel, and neither of them were making it that way, even if they both slammed on the brakes. Scafy stuff, Peugeot's skid mark on the dirt mound is still visible today (happened in August).
It is the rev limiter sound when the car is in the air. pop.popp sound is coming additionally from anti-lag system keeping the turbo spinning! It sound incrediable in real life!
To make it simple the pop sound (many times goes with flames) is because of the clutch and the engine "idling". It is actually a very dramatic effect for a simple reason... to protect the engine because the engine is built and ment to be at full power all the time so when you let go of the full power (like in the air etc), you have this because you don't whant your car to stall. A very simplisctic explanation here hehe :)
1:15 If the wheels lose contact with the ground and you hold the gas pedal down, the wheels turn without resistance and the rpm goes up to the maximum permissible setting, also known as the rev limiter. This protects your engine from blowing up if you press the gas pedal all the way down and dont shift 5:30 its a different pop if you listenclosely, its deeper and not so sharp like the rev limiter. If you brake but still press on the accelerator pedal, more force is exerted on the engine, which can lead to sudden pressure changes in the exhaust.
I think the pop sound happens, because the Engine control unit delays the ignition when it decides no more power is needed. This would be when you hit the rev limiter or when you are shifting down the gears for example. Delaying the ignition means the exit valves are already open when the fuel mix gets ignited, which in turn means the fuel mix sort of explodes out of the exhaust instead of driving the piston. So you can hear it making a pop sound.
Turning "the other way" is called 'Opposite lock' and aids the change in direction. The popping sound is a series of backfires as the foot is lifted off the accelerator and air is dawn back into the exhaust causing excess fuel to burn quickly in the hot exhaust. Note it happens as they are slowing quickly for bends etc.
These cars are stripped down to a bare shell, then lots of tubular strengthening is fitted, for example a multi point roll cage (like building a dune buggy inside the body of the car) is fitted. Then light weight carbon fibre and fibre glass body panels fitted to make it look similar the road going version that the public can buy. The engine and gearbox are taken out for a massive rebuild and upgrade. The suspension is also replaced with heavy duty stuff. Subaru USA can do this in 800 hours. ua-cam.com/video/GKGKh7JCPME/v-deo.htmlsi=ZS5Mx8TsQy7qTy7d
The rules depend on car category and depending on category you need to use panels and parts that come from a production vehicle. The top level can use more exotic materials while entry level has to follow production vehicle closer and might have cost cap. Currently top-level Rally1 cars start from a FIA safety cell (a spaceframe basically) and just have lightweight parts added (a silhouette basically). Lower categories need to start from steel chassis from a production car which is strenghtened by changing spot weld into continuous welds and so on. In some series, lowest categories sometimes mandate that you have to use fuel tank from a production car while top level might demand racing-oriented tank instead. There's a lot of differences. Video about the welds: ua-cam.com/video/bj7EjaSNDfw/v-deo.html
As people have said, it’s the Rev limiter, sometimes, sometime when you point it out, often associated with flames out of the exhaust pipe, it’s the dump valve on the turbo, caused by taking your foot off the accelerator at high revs.
the "pop pop" could be one of two things: #1: just the rev limiter so that the engine doesnt get over revved in the air, or #2: its the Anti-Lag System (ALS)- this is a system where the ignition of the engine gets retarded way back so that fuel combusts in the exhaust header to keep the turbo spooling to dont lose the boost :) hope i could clear that up. Greets from germany!
The Pop-Pop-Pop is the ALS Anti Lag System. It ignites fuel gas inside the exhaust before the turbo to keep its revs up. So the full turbo pressure can be used at any time. The system kicks in when they let of the throttle. Therfore the engine will produce less exhaust pressure to the turbo and the ALS compensates that.
You are right most of us drive cars some drive fast but we all just enjoy how this drivers are almost superhumans have reflexes eye-hand-feet coordination and hugeee baallsss
When you asked how do they know where their going the co-driver has detailed pace notes which he calls to the driver several corners/hazards ahead because of the speed the car is going. Where your flying car is the road drops away after an elevated section.
1:13 wheels in the air so they start spinning much faster and engine hitting the RPM limiter. Basically when it hits limiter the power is cut and it drops the RPMs a bit, then restores power and hits limiter again. And keeps doing it until it hits ground. Same thing you can hear at 3AM when Honda Civic drives down the street.
90 percent correct. the popping just means there is unburned fuel in the exhaust that gets off by the heat. so mostly because the turbo pumps so much air fuel mix inside the engine that some of it doesnt get properly burned and this ignites later
That pop-pop-pop noise comes from the car's exhaust. All the cars are brutally tuned and as you surely know, they don't have a sound like usual public cars. Everything on the cars is created and manufactured for the performance, lightness and controllability. There's no space for a luxury and relax in these cars, they have giant turbos/compressors and don't have an exhaust-muffler, that's why they do have that raw sound and sometimes you can see the fire shooting from the exhausts.. 😀
The sound that can be heard when braking is the ALS anti lag system to keep the turbo at maximum speed so that when the pilot presses the accelerator again the engine has the maximum power available
The "pops" when releasing gas pedal is because rally cars are set up in a way where off throttle ECU still keeps dumping fuel and air but ignites it extremely late so it explodes when exhaust valve is open. It's done like that to create more pressure to keep the turbo spinning even when off throttle. This way you have as close to instant power as possible once you get back on that gas pedal. I could be wrong about specifics on how it works. But the reason is basically just to keep the turbos spinning and minimizing turbo lag.
Many cars equipped with turbo compressors have an anti-lag system: when the driver relieves the accelerator, the engine management system enriches the mixture and triggers a bypass which sends air directly into the exhaust manifold where it mixes with unburned fuel which causes explosions. The resulting increase of the pressure of the exhaust gases spools up the turbo. When the driver re-accelerates, the turbo speed being very high, there is virtually no lag.
quite a few of the pops and bangs are caused by the anti lag system. keeps turbo pressure up whilst off the gas so almost instant acceleration can be had after the braking phase.
The popping is "anti-lag". It's deliberately misfiring the engine (making a bang in the cylinder with the exhaust valve still open) in order to keep the turbo spinning. These cars have a maximum of a 2 litre engine so they're heavily boosted with turbos - hence the need to keep them spinning at all times.
Scandinavian Flick is what you saw at the beginning turning away from the curve to flick it back in to the apex. Pops from the engine are usually from Turbo lag. dont ask me to explain it, something to do with air going into the turbo/ turbine when under breaking.
3:30. Looks like the suspension collapsed (probably from a jump or contact with the verge) and when the car rolled on the corner, the wheel caught the bodywork and it all just exploded.
Deep respect for trying to avoid "like"!!! I learned so many words and expressions in English, only to find out that everything I need is to put "like" here and there and everything is fine. Btw Audi Quattro and Lancia delta Integrale are like Micheal Jordan and Shaquille O'Neal in rally history.
It's either a Ford Fiesta or a Hyundai i10 or i20. Newer rally cars have an extra flap that closes the air supply to the engine so that the engine is not damaged. I can't say whether this is done manually by the co-driver or whether it works automatically.
5:01 the thing is in the steering wheel, the steering wheel is direct and turns the wheels instantly *** 6:55 the frame of the car is reinforced in addition, the Citroen factory said that one rally race is the equivalent of 100 years of testing at the factory therefore, in rally races, you very often have countertypes of shock absorbers, springs, discs and brakes which will later be in F1, then in luxury cars and finally in all cars *** 10:16 overtaking in a rally is very rare because each car is 30 seconds apart but if the previous one had an accident and got stuck somewhere, it is possible that the one behind it will catch up but this was a very careless overtaking, both drivers may be penalized after the race *** 11:07 this is very scary the road is as wide as the car, and it goes at a speed of more than 160 kmh (100 mh) *** 13:07 that the car took off due to high speed even a small bump can launch a car into the air at speeds higher than 200 km/h and according to the length of the jump, he was at full throttle, which means somewhere around 250 kmh (155 mph)
the popping from when they're in air is the engine hitting the rev limiter, the same popping but on read comes both from hitting the rev limiter and also from something called "anti-lag", it goes off when releasing the accelerator, that system keeps the turbo charged so that it doesn't have lag, the result of that it's the popping sound, on race cars it's anti-lag, on any street car is just a dumb "burble tune" on the ecu of the engine that doesn't do anything, the Bang between gear changes simply comes from having a ton of power, lastly, those cars don't snap in half because their chassis are reinforced beyond imagination
If you never went to a big racing event, do it at least once in your life. You have to be there to experience it. I'd say main thing apart from atmosphere is the sounds. I can tell you that a pop of a Moto2 or MotoGP bike is like a small explosion. Also, at Nurburgring turn1 braking zone, with GT3 cars, the whole grandstand is shaking. Or, standing on top of the Eau Rouge corner, or at the bottom looking up. It's a serious 5 minutes uphill walk, but cars just fly up there in seconds. Also the speeds get to you at certain spots. Feel the earth under your feet rumble. It's just fantastic. btw WRC is totally nuts! :)
7:42 I appreciate the shout out to this guy's talent, I really do, but you are quite wrong. There's a difference of several orders of magnitude between normal driving and this, so much so that a 5 year old knows more about driving a car than a good everyday driver knows about driving at this level. It's insane how different it is, and even with all that talent, it takes another level of human being to have the balls to drive like this on a forest road, over and over again even if it rains or snows.
Great video. Rally is an amazing exhibition of car control and Iron nerves. I've been to a lot of rallies in my home country (Netherlands), but I always freak out when I see these fans in these videos get so close to the track. That sort of thing NEVER happens in here
@@megatryn It's used more like "hell", but you are right with your direct translation. Direct translations are not very helpful as question is what it mean, not what the word translates to.
@@niclas.lindstrom Functionally, the translation would be more like "shit". But you can't give just the functional translation without the direct translation, cause you cn't say "jävlar" means "shit" or "hell", because it simply doesn't. It functionally is used as those words, but it doesn't mean that.
These cars have massive roll cages and other structural improvements. Especially for the new hybrid systems. Just to give you an idea: the suspension of the Rally 1 cars (“WRC”, the big boys) are made to withstand around 2 tons of pressure per tire. Otherwise they couldn't land those jumps. And as mentioned further down: the engine noise it just the engine hitting the rev limiter.
Either the engines rpm reaching absolute maximum or, an anti lag system which is really an afterburner. Like with jet engines well turbofan engines you inject small amounts of fuel into the exhaust for more power, in a turbocharged internal combustion engine it's used to keep the turbo spooled up and is activated by letting off the accelerator pedal. If it wasn't installed you'd have lag as you wait for enough exhaust gases to spool the turbo back up again. The banging sound is the fuel being put into the exhaust manifold and it banging under the immense heat.
1:23 - if the wheels are of the ground the engine is hitting the rev limiter, fuel is cut but the turbo anti-lag kick in to keep the turbo spinning if the driver would like to shift. 3:24 - after some of the jump you’ve seen, are you surprised that wheel will fall of ? 😂
That popping is caused by turbo dumping pressure when the engine hits rev limiter. Engine runs against the limiter and turbo is still making pressure, it has to go somewhere, so its dumbed thrue the waistgate.
Anti-lag system (ALS) is a method of reducing turbo lag or effective compression used on turbocharged engines to minimize turbo lag on racing or performance cars. It works by delaying the ignition timing and adding extra fuel (and sometimes air) to balance an inherent loss in combustion efficiency with increased pressure at the charging side of the turbo. This is achieved as an excess amount of fuel/air mixture escapes through the exhaust valves and combusts in the hot exhaust manifold spooling the turbocharger creating higher usable pressure.
The popping you hear from exhaust is caused by there being fuel left in the cylinder and it burns off in the exhaust. They have their car tuned 'richer' in the fuel to air mix.
I think the the pop pop is a manipulation of fule added to the manifold to retain the turbo boost when you go off the throttle, it is done to decrees turbo lag. There by increasing engine responsiveness.
Rev limiter to answer your question - driver foot to the floor, you leave the ground (or, y'know, change gear) and, yeah.. The other common noise you hear in rally is the wastegate valve, though that isn't that one you're asking about. Also controlling the slide like that, you'd be surprised I think how naturally that happens - I mean I don't necessarily recommend you try, we have experience days for that sort of thing - it's actually surprisingly natural and happens by feel, though it helps a lot if the car is well balanced.
The "pop pop pop" sound often made by rally cars is usually due to a phenomenon called "backfire." Here are the main reasons why this occurs: 1. **Turbocharging and Anti-Lag Systems (ALS)**: Rally cars are often equipped with turbochargers to increase engine power. To minimize turbo lag, rally cars use an anti-lag system. This system works by injecting fuel into the exhaust when the throttle is released. The resulting explosion keeps the turbo spinning even when the engine is not under load. This process produces the characteristic popping and crackling sounds. 2. **Rich Air-Fuel Mixture**: Rally cars often run on a rich air-fuel mixture, meaning there is more fuel than necessary for the amount of air present. When this mixture doesn’t completely burn in the combustion chamber, it can ignite in the exhaust, causing popping sounds. 3. **Performance Tuning**: To maximize performance, rally engines are often tuned for extreme conditions, which can include advanced or retarded ignition timing. These settings can also contribute to the backfire phenomenon. 4. **Exhaust and Noise**: The exhaust systems on rally cars are often designed to be as free-flowing as possible, which can amplify the noises coming from the engine, including the explosions caused by the phenomena described above. These elements are designed to maximize engine performance and responsiveness, but they also produce distinctive sounds that have become an iconic feature of rally cars.
Hitting the limiter in the air, but more specifically the limiter has to be one that cuts ignition rather than fuel, because in the case of ignition limiter theres still fuel going into the cylinder, but its not ignited there, so it explodes in the hot exhaust instead causing the pops.
the pop sound is the cars anti-lag system which when you release the throtle or brake it keeps the turbo spooled by pushing air into the turbo so on exit of a corner you get full axceleration
The air lift when the cars fly, is caused partly from keeping the throttle down, the wheels spinning in mid air contributes to the front of the car lifting slightly. It's more apparent with a transverse engine 4x4s
The wheels are off the ground but the foot is still flat to 5he floor and the engine is trying to save its self from over reving so the engine management cuts the ignition temporarily to keep the rpm under a pre set level.
The pops comes when u lift off the throttle and the timing of spark plug is delayed so the combustion happens when the exhaust valve is open and hence it will spool up the turbo and keep u in boost. Its called ALS anti lag system.
Normally you don't race each other but the clock. There is a time gap between the starts of two cars. They meet only when the first car is very slow or the later car is very fast.
Most modern rally cars are made with a rigid frame, an engine, a very rigid interior construction with a roll cage, and a mostly plastic or fiberglass body shell looking the same as the car it is based on. That's why these cars can fly and not break. Older cars and more amateur-ish cars are based on the original car, prepped for rally driving. The driving skill of these drivers is insane, going 100+ mph over these bumpy gravel roads and flying around.
5:00 That's called the Scandinavian flick It originated from when mainly Swedes, of course, drove SAABs that had front wheel drive. They also came up with left foot braking to keep the throttle up in the corners. Now you ask, why are they doing it with modern cars? And I'm glad you asked: Both FWD and 4WD are understeering. Hence, it's a bit more difficult to get the ass out (pardon my French). You have to force it a bit more than if you RWD.
A lot of these are all-wheel drive, most have squential transmissions and fiddle brakes. The privateer cars are just little front wheel-drive hatchbacks which is why they often wipe-out on fairly easy turns, lose their wheels etc.
The drift at the 5 minute mark. If you really pay attention, you can see that he completely lets go of the steering wheel so that the forward momentum of the car would straighten the wheels itself. Why? Because if he grabbed the steering wheel while the front wheels weren't straight, the car would accelerate to which ever direction the wheels were facing when he tried to grab the wheel. These guys are on a completely different level haha.
Its not always the revlimiter... in the air it might be, but on the ground they use fuel to keep the turbos spinning. Its called anti-lag and there are a lot of videos on youtube how it worls exactly
1.)
That "pop-pop-pop" sound means, that the engine hit its limiter. Limiters are used so the engine doesnt go to dangerous RPMs that could damage the engine or some other components down the line. Its set up in the software of the cars computer (ECU).
Since it was in the air, there was no drag/friction from the ground below and the driver was still on the throtle on full, pedal to the metal, so the engine kept reving up...up to the limiter.
2.)
The other pop-pop-pop is different. The cars are set up that the ignition of the fuel is delayed.
That means on the 4th stroke, when the piston supose to push out the burnt fuel (smoke) -> the valve opens for that.
But since its delayed, the fuel burns while the valve is open, and the fuel doesnt burn only in the combustion part, it also still burns on the outtake.
It is done so, because it causes higher pressure, and that higher pressure of burnt gases helps the TURBO be still spooled up in high RPMs, which helps the engine to have high power on lower Engine RPMs and gives even more power on high RPMs.
Since its so fast, sometimes the fuel doesnt burn in the combustion chamber, nor in the outtake manifold, it can travel more down the line in the exhaust pipe. Since the exhaust pipe is also hot, the fuel will touch it eventually and that heated pipe will make the fuel burn. And THOSE are the pops you hear.
When you see cars that spit fire from their exhausts, this is it...delayed burn....althougth some people over-do it and its spitting too much flame and bork their cars.
Rally cars, or modified cars that want to implement this, need to install better, beefier outtake manifolds, exhaust pipes and other components, so they can withstand the higher pressure and higher heat, since the fuel doesnt only burn in the combustion chamber.
3.)
So both of these intertwined.
Since he was up in the air, he hit the limiter....thats why the pops are so consistent.
You can also hear/see these when they are switching down to lower gear, which means the RPMs go up, which means more combustion( or the lack there of), more pop-pop and spitting fire from the exhaust.
4.)
Rally cars a built different. They have sooooo many hardened parts of it, tubes that stiffen the whole car. This helps when racing since they need to endure the tortute/abuse they go through. And its also for the safety of the crew.
Like the fuel tank. It has to be a box from hardened metal, so not even in a very bad accident, they wont leak and cause fire.
5.)
At @1:55 to @1:57 , you see that the hammered into into the bridge rails, and the bridge rail when through the windshield and almost hit the head of the driver.
I similar thing happened last year too. A driver hit a bridge rail that was made out of tree logs, and hit the driver and the driver died to severity of his injury.
6.) The drivers are insane. They can go up to around 200 - 220 km/h ( 124 - 136 mil/h ).
The only thing I'd correct is how antilag works. If it's been setup correctly you aren't getting unburnt fuel igniting further down the exhaust. You want the ignition event to still begin within the cylinder but with the exhaust valve open so the fuel burns and the gas expands out into the turbo turbine housing. This is what keeps it spinning within it's desired operating range under a zero-throttle condition. If the fuel isn't burning until well after the turbine then it's completely wasted and you're throwing it away for nothing.
It also doesn't make any more power than a system without antilag. All it does is reduces the intake system inertia when the driver gets back onto the throttle again so that he regains power faster. It's a driveability improvement not a power one.
They flip the car at corners and then turn into the corner. Would think the science would to keep the car going straight through the corner so maximum traction and speed.
@@AnthonySinclair-Wellings It's called a Scandi flick. You turn the car away from the corner then turn the car quickly into the corner. Doing this shifts the weight of the car's rear end allowing it to step out and rotate faster. It's good for tight corners.
@@Fez135 the same way when you are at full throttle, and you put the gearbox down a gear or even two
because of this, the fuel comes out before the explosion, the exposure follows in the exhaust
@@tihomirrasperic Not really. If you're getting any flames at all it's normally down to things like valve/port overlap, or in older cars with carburretors because you have less control over fuelling and you're getting more fuel than can be burned with the throttle closed so there's leftover fuel that will ignite in the exhaust. Those things aren't desirable though.
Antilag is a specific technique where the fuel is still ignited in the cylinder using the spark plug, it's just done about 180-360 degrees late during the exhaust stroke instead of at the end of the compression stroke. The throttle is also bypassed to ensure that the the fuel has enough oxygen to burn.
The maneuver before the rotation of the car is called Scandinavian flick.
Also called pendulum turn.
@@johnnettleton849Never heard of that , Scandinavian flick term and style dates back to 1960s
..or an Inertial Drift.
@@johnnettleton849It is done so you can turn faster by using the weight transfer to your advantage
it does help the turn in some way
And you have just watched the single reason why Europeans find (most) Hollywood car chases completely lame!
The main reason is, that American car chases are usually filmed at very low speeds, whereas car chases in Europe are filmed at high speed.
When the Americans do high speed, it's just sped up video or CGI and it doesn't look realistic in either case.
@@akyhne no American car can compare with a rally car
@@tihomirrasperic Did I say, they could?!
@@tihomirrasperic They also do rallys in the US. Its just less common.
@@akyhneno
if it's in the air, it's the rev limiter, if the car is on the ground and slowing down, it's the anti lag
The pop pop pop sound is the anti-lag for the turbo. Without it there would be a big hole in the power/torque until the turbo spins up.
BS
@@martinthompson7160 oh really?
Finally found the correct answer 😂
Fuel mapping to still feed fuel whilst off throttle to keep the turbo spinning ready for when you full throttle. The pop pops are from unburnt fuel igniting when exiting the exhaust as air is introduced to the unburnt fuel.
Yes, I learned that when they updated the game Forza Horizion 5, they needed the anti-lag in the game.
We sometimes call that snow, when the landscapes looked so white and night, when the sky is that black
lol
The white stuff has many names.
😂😂😂
With rally cars the popping sound is anti-lag the car pumps more fuel causing fuel build up in the exhaust causing a flame and popping sound that also creates back pressure to the turbo to keep it spinning when your foot is not on the throttle
Its not that it increases fuel, but it cuts ignition while still spraying full as if full throttle (or close to) and every now and then a cylinder fires just to keep rpms up
In this case, it's the rev limiter kicking in though. Driver says on the gas while in the air, causing revolutions to go up and hit the ceiling. The pop-pop sounds are basically intermissions between 2 states; state 1 fuel is being supplied and ignition also (normal operation). State 2: Rev limiter preventing fuel injection to prevent the engine from "overspeed".
0:10 turn wrong side, than turn into the corner... scandinavian flick... used to change the balance of the car...
And get some speed down.
Even more used with 4 wheel drive cars to brake tracktion to rotate faster.
Hi there are several reasons for the funny sounds:
1. the Rev Limiter, when fuel is cut off in order to prevent the engine from revving higher;
2. The Turbo Wastegate. When the Turbo reaches maximum allowed boost pressure, the pressure works against a spring loaded valve, which then opens and releases the air, instead of pushing it into the engine. That's the "pop off" like sound
3. In order not to loose too much "pulling force" of the engine while chagning gears, the cars just cut off ignition, and making the sparkplugs "hot" (giving them electricity) again when the new gear is inserted. This forces unburned fuel into the exhaust system, where it is burned afterwards, hence the explosion sound coming from the exhaust and the flames coming out at the rear.
So rally is quite spectacular to éyes and ears!
Greets from Austria!
And yes, i am "i have been watching Group B" in my 20ies years old!😊
6:32 "now that's a rally car",😂 yes indeed, you could argue that is THE rally car , the most impactfull and most famous for sure, = the group B. Audi quatro
Agreed the Quattro is an Icon but you've got to give a bit of credit to the smaller cars like the Metro 6R4
Don't forget the Lancia Stratos ......
Peugeot 206
I'd argue the Lancia Delta is more famous
Hi there, i think you're almost right. Why "almost"? Yes the "short" QUATTRO S1 EVO II beeing driven by Walter Röhrl and Stip Blomqvist may be one of the most iconic cars of the time. But it came a little to late. According to my opinion the Lancia Delta S4 and the Peugeot 205 Turbo 16 have been more competitive and won more Rallyes. While the most successful AUDI was the predecessor of the S1 , the longer QUATTRO "A2", beeing driven by Michele Mouton for example..
Good guess :)
Yes, that is Swedish.
"Djävlar" is a curse word mostly used when being impressed by something.
Sidenote: "Djävla" without the r is very negative and mostly destructively used. Don't ask why the r is used that way for this word. Normaly it indicates doing something or plural depending on context
Yeah, really good guess 👍And thanks for the explanation. I'm Danish, and our languages are very similar, but I never knew the difference between Djävla and Djävlar ☺
@@unclefungus2011 Its simular to Pokkers I presume.
For me i would spell it like jävla och jävlar
I once went to a charity event at Silverstone circuit and with my husband and son got the chance to be driven around by a rally driver in a rally car. It was a white knuckle experience!! Never again.
At least you had the guts to do it. That's something you can be proud of and of course brag about. 😁
I would never do that, or I would sh*t in my pants 😂
Atleast Silverstone has proper barriers hahaha
the sound mid air is becuase he hit the limiter high red zone pure eargasm
You have to love that they still have it pinned while midair leaving the limiter screaming!
It's the reflex to secure yourself, and you are flat out!!! Reverência limiter, mate!❤
@@tattoodude8946 It's the exact opposite. That sounds is the anti-lag system designed to maintain turbo pressure when the driver lifts off the throttle, minimizing turbo lag and ensuring continuous power when he lands.
Noise on the car is it hitting it's rev limiter.
Nope, it's the anti-lag system designed to maintain turbo pressure even when the driver lifts off the throttle, minimizing turbo lag and ensuring continuous power.
@@lebrigand4115 No...When the car takes off the engine goes into limiter.. Anti-lag is the hissing sound from the turbo or the wastegate valve.
@@Zaehlwerk Anti-lag doesn't make a hissing sound.
@@lebrigand4115 Whatever it sounds like, it is not the rattling of the limiter that is meant here.
I believe the crackle sound is from the anti-lag system on the turbocharger. When the engine is not near full throttle, a little bit of fuel is added to the exhaust which combusts in the exhaust, causing repeated backfires, but also keeping the turbo speed up. I may be wrong.
Hello man! During the flight, due to the fact that the wheels no longer have grip/traction, the engine reaches maximum revs, in limitation. When it comes to braking periods, that's where the ALS (anti-lag system) intervenes. This system, through a valve, allows fresh air to reach the exhaust manifold directly. This fresh air interacts with the burnt gases rich in unburned fuel and results in combustion, only at the level of the exhaust manifold. This combustion in the exhaust manifold eliminates the fact that the engine must be revved to generate the exhaust pressure required for the turbine. The engine drops quietly from high revs, and the exhaust pressure, necessary to keep the turbine in revs, is produced only by combustion in the exhaust manifold and not by high engine revs. So practically during the braking periods, that noise is exhaust noise more often, produced by the combustion in the exhaust manifold, while the one during jumps, is still an exhaust noise, but less often and produced due to the engine reaching maximum revs.
Only once have I seen these guys live and that was at Kielder Forest years ago and I knew then that these guys are the most talented, bravest drivers in motorsport.
WHat you said first is absolutly correct. It's called a flick or pendulum and used to baslically let the rear give you the tankslapper you need for a perfect rotation, while making the fronts bite and transfering the slide to the rear of the car and in general making the turn a little longer, so the apex moves 'forward' in your favor and you can be on the throttle before it, whats essential to havee a straight and gripping exit. Good eye to get all that by watching ;) Secondly, snow is just a dream to drive a rally car on - no stress at all, its like a day on the beach :) The pop-pop (also good analysis that reminds me on ping ping from solar opposites^^, it's called pop off -and waste gate^^) are to control the turbo pressure a little and give you some anti lag while getting rid of overpressure, the rest is just exploding gas and oilrests in the glowing hot exhaust. What happened to the car that fell apart, doing jumps and drifts over stones and bumps all day i think is self explainatory.. it fell apart :) I'd put tht one on too big spacers for the fronts, so they are as wide as possible to prevent understeering in that amatuer FWD, what releases froces that car simply isnt built for.
The pop pop sound is from the anti lag system, this keeps the turbo spooled, when there not on the throttle.
This sound is called ALS. The turbocharger needs exhaust gases to spin, so when you take your foot off the gas pedal, the system injects fuel that doesn't burn in the engine but in the exhaust. This way, despite the engine RPMs dropping, larger amounts of exhaust gases are produced, which maintain the appropriate turbo speed.
Seems like you confused turbocharger with supercharger, turbo is powered by exhaust gases
@@Samantha23478 The exhaust gases are fed back round into the exhaust side of the turbo, spinning the turbo to compress the cold air in the inlet side of the turbo to create more dense clean air to use in combustion.
@@Samantha23478sorry but that's not right. There's 2 side of a turbo, one side being driven by exhaust gases so that the other side can suck in air and force it back into the intake. Also it doesn't push cold air into the engine, it's actually pretty hot as a result of the exhaust runnig trough it and the turbo spinning at very high rpm, thats why you need an intercooler to cool that hot air down again as much as possible
If it's in the air the sound is the rev limiter cutting and re-engaging the ignition. If it's still on the ground (usually in tight turns) the driver has lifted his foot and the anti-lag system injects fuel into the turbo to keep it spinning fast allowing full power to be available instantly when the driver gets back on it.
These cars are usually built specifically for this. The frames are heavily reinforced. A strong roll cage is fitted and the suspension parts are designed to take punishment like that without breaking. Almost nothing on these vehicles came from a 'normal' street car.
When the car is in the air that "pop pop pop" is the engine hitting it's maximum allowed spinning speed (rev limiter). Because it's off the ground the wheels have nothing to grip so they spin really easily maxing out the rev's. This can also happen while on the ground but usually only when accelerating very hard in lower gears and not changing up soon enough.
The one on the ground (about 5:40) you pointed out could also have been engine 'crackle'. When they brake really hard the engine slows down really quickly so not all of the fuel mixture going into the engine burns properly and passes straight through the engine into the exhaust system. Because the engine is being worked so hard the exhaust pipes are glowing red hot and this ignites the unburnt fuel creating those crackles and bangs.
1:18 That noise is from achieving max RPM (an electronic switch cuts the motor to prevent failure) and usually happens in mid air because drivers don't lift the foot from the accelerator and the lack of friction in the wheel allows to hit max almost instantly.
The sound from the tail pipe is the antilag. Adjustments made in the tune so it sends extra fuel to spool the turbo when braking or coasting.
the pop bang is antilag, the heat from the exhaust manifold keeps the turbo spinning even tho you're not pressing the accelerator, but when you do the turbo is spinning ready to go....and technicaly you only need to see like half of where you're going if you got a good co-driver, rally, moto cross and dakar thats probably the top 3 of driving sports
10:05 My home town rally! Happened last year, no one got injured (it was so close to not being that way). Peugeot 208 Rally4 had, for the better part of a mile tailing the Suzuki Swift N5 waiting for the Suzuki to let him by, as rules say. Clearly done with the Suzuki not moving aside before in a zone where he could've, the Peugeot's driver sees the Suzuki move and goes for it, but inmeadiatley after that corner there's a VERY narrow tunnel, and neither of them were making it that way, even if they both slammed on the brakes. Scafy stuff, Peugeot's skid mark on the dirt mound is still visible today (happened in August).
It's amazing what a cage of chrome-molybdenum steel tubing can do to maintain the rigidity of the body of the car.
It is the rev limiter sound when the car is in the air. pop.popp sound is coming additionally from anti-lag system keeping the turbo spinning! It sound incrediable in real life!
To make it simple the pop sound (many times goes with flames) is because of the clutch and the engine "idling". It is actually a very dramatic effect for a simple reason... to protect the engine because the engine is built and ment to be at full power all the time so when you let go of the full power (like in the air etc), you have this because you don't whant your car to stall.
A very simplisctic explanation here hehe :)
1:15
If the wheels lose contact with the ground and you hold the gas pedal down, the wheels turn without resistance and the rpm goes up to the maximum permissible setting, also known as the rev limiter. This protects your engine from blowing up if you press the gas pedal all the way down and dont shift
5:30
its a different pop if you listenclosely, its deeper and not so sharp like the rev limiter.
If you brake but still press on the accelerator pedal, more force is exerted on the engine, which can lead to sudden pressure changes in the exhaust.
I think the pop sound happens, because the Engine control unit delays the ignition when it decides no more power is needed. This would be when you hit the rev limiter or when you are shifting down the gears for example. Delaying the ignition means the exit valves are already open when the fuel mix gets ignited, which in turn means the fuel mix sort of explodes out of the exhaust instead of driving the piston. So you can hear it making a pop sound.
Turning "the other way" is called 'Opposite lock' and aids the change in direction. The popping sound is a series of backfires as the foot is lifted off the accelerator and air is dawn back into the exhaust causing excess fuel to burn quickly in the hot exhaust. Note it happens as they are slowing quickly for bends etc.
These cars are stripped down to a bare shell, then lots of tubular strengthening is fitted, for example a multi point roll cage (like building a dune buggy inside the body of the car) is fitted. Then light weight carbon fibre and fibre glass body panels fitted to make it look similar the road going version that the public can buy. The engine and gearbox are taken out for a massive rebuild and upgrade. The suspension is also replaced with heavy duty stuff.
Subaru USA can do this in 800 hours. ua-cam.com/video/GKGKh7JCPME/v-deo.htmlsi=ZS5Mx8TsQy7qTy7d
The rules depend on car category and depending on category you need to use panels and parts that come from a production vehicle. The top level can use more exotic materials while entry level has to follow production vehicle closer and might have cost cap. Currently top-level Rally1 cars start from a FIA safety cell (a spaceframe basically) and just have lightweight parts added (a silhouette basically). Lower categories need to start from steel chassis from a production car which is strenghtened by changing spot weld into continuous welds and so on.
In some series, lowest categories sometimes mandate that you have to use fuel tank from a production car while top level might demand racing-oriented tank instead. There's a lot of differences.
Video about the welds: ua-cam.com/video/bj7EjaSNDfw/v-deo.html
As people have said, it’s the Rev limiter, sometimes, sometime when you point it out, often associated with flames out of the exhaust pipe, it’s the dump valve on the turbo, caused by taking your foot off the accelerator at high revs.
the "pop pop" could be one of two things: #1: just the rev limiter so that the engine doesnt get over revved in the air, or #2: its the Anti-Lag System (ALS)- this is a system where the ignition of the engine gets retarded way back so that fuel combusts in the exhaust header to keep the turbo spooling to dont lose the boost :) hope i could clear that up. Greets from germany!
The Pop-Pop-Pop is the ALS Anti Lag System. It ignites fuel gas inside the exhaust before the turbo to keep its revs up. So the full turbo pressure can be used at any time.
The system kicks in when they let of the throttle. Therfore the engine will produce less exhaust pressure to the turbo and the ALS compensates that.
You are right most of us drive cars some drive fast but we all just enjoy how this drivers are almost superhumans have reflexes eye-hand-feet coordination and hugeee baallsss
When you asked how do they know where their going the co-driver has detailed pace notes which he calls to the driver several corners/hazards ahead because of the speed the car is going.
Where your flying car is the road drops away after an elevated section.
1:13 wheels in the air so they start spinning much faster and engine hitting the RPM limiter. Basically when it hits limiter the power is cut and it drops the RPMs a bit, then restores power and hits limiter again. And keeps doing it until it hits ground. Same thing you can hear at 3AM when Honda Civic drives down the street.
90 percent correct. the popping just means there is unburned fuel in the exhaust that gets off by the heat. so mostly because the turbo pumps so much air fuel mix inside the engine that some of it doesnt get properly burned and this ignites later
note that this is on purpose to make the engine more efficient but also mostly illegal in road cars because this doesnt comply with the pollution laws
That pop-pop-pop noise comes from the car's exhaust. All the cars are brutally tuned and as you surely know, they don't have a sound like usual public cars. Everything on the cars is created and manufactured for the performance, lightness and controllability. There's no space for a luxury and relax in these cars, they have giant turbos/compressors and don't have an exhaust-muffler, that's why they do have that raw sound and sometimes you can see the fire shooting from the exhausts.. 😀
1:05 the rpm limiter
The sound that can be heard when braking is the ALS anti lag system to keep the turbo at maximum speed so that when the pilot presses the accelerator again the engine has the maximum power available
The "pops" when releasing gas pedal is because rally cars are set up in a way where off throttle ECU still keeps dumping fuel and air but ignites it extremely late so it explodes when exhaust valve is open. It's done like that to create more pressure to keep the turbo spinning even when off throttle. This way you have as close to instant power as possible once you get back on that gas pedal.
I could be wrong about specifics on how it works. But the reason is basically just to keep the turbos spinning and minimizing turbo lag.
Many cars equipped with turbo compressors have an anti-lag system: when the driver relieves the accelerator, the engine management system enriches the mixture and triggers a bypass which sends air directly into the exhaust manifold where it mixes with unburned fuel which causes explosions. The resulting increase of the pressure of the exhaust gases spools up the turbo. When the driver re-accelerates, the turbo speed being very high, there is virtually no lag.
The pre turn is to let the momentum of the rear to flick out and help to turn by sliding around it's how drifting happens
The pop pop pop sound is the noise coming out of the cameramans arse.😂
I remember going to watch group b best era of rally for me absolute monsters. Lancia delta great rally car in it's day.
quite a few of the pops and bangs are caused by the anti lag system. keeps turbo pressure up whilst off the gas so almost instant acceleration can be had after the braking phase.
As others have said, the driver has their foot nailed to the accelerator thus hitting the rev limit. The fluttering sound is the turbo. Peace.
The popping is "anti-lag". It's deliberately misfiring the engine (making a bang in the cylinder with the exhaust valve still open) in order to keep the turbo spinning. These cars have a maximum of a 2 litre engine so they're heavily boosted with turbos - hence the need to keep them spinning at all times.
Scandinavian Flick is what you saw at the beginning turning away from the curve to flick it back in to the apex.
Pops from the engine are usually from Turbo lag. dont ask me to explain it, something to do with air going into the turbo/ turbine when under breaking.
3:30. Looks like the suspension collapsed (probably from a jump or contact with the verge) and when the car rolled on the corner, the wheel caught the bodywork and it all just exploded.
Deep respect for trying to avoid "like"!!! I learned so many words and expressions in English, only to find out that everything I need is to put "like" here and there and everything is fine. Btw Audi Quattro and Lancia delta Integrale are like Micheal Jordan and Shaquille O'Neal in rally history.
It's either a Ford Fiesta or a Hyundai i10 or i20.
Newer rally cars have an extra flap that closes the air supply to the engine so that the engine is not damaged. I can't say whether this is done manually by the co-driver or whether it works automatically.
5:01
the thing is in the steering wheel, the steering wheel is direct and turns the wheels instantly
***
6:55
the frame of the car is reinforced
in addition, the Citroen factory said that one rally race is the equivalent of 100 years of testing at the factory
therefore, in rally races, you very often have countertypes of shock absorbers, springs, discs and brakes
which will later be in F1, then in luxury cars and finally in all cars
***
10:16
overtaking in a rally is very rare because each car is 30 seconds apart
but if the previous one had an accident and got stuck somewhere, it is possible that the one behind it will catch up
but this was a very careless overtaking, both drivers may be penalized after the race
***
11:07
this is very scary
the road is as wide as the car, and it goes at a speed of more than 160 kmh (100 mh)
***
13:07
that the car took off due to high speed
even a small bump can launch a car into the air at speeds higher than 200 km/h
and according to the length of the jump, he was at full throttle, which means somewhere around 250 kmh (155 mph)
the popping from when they're in air is the engine hitting the rev limiter, the same popping but on read comes both from hitting the rev limiter and also from something called "anti-lag", it goes off when releasing the accelerator, that system keeps the turbo charged so that it doesn't have lag, the result of that it's the popping sound, on race cars it's anti-lag, on any street car is just a dumb "burble tune" on the ecu of the engine that doesn't do anything, the Bang between gear changes simply comes from having a ton of power, lastly, those cars don't snap in half because their chassis are reinforced beyond imagination
The car doesn't go up... but the road is going down and down :-D
If you never went to a big racing event, do it at least once in your life. You have to be there to experience it. I'd say main thing apart from atmosphere is the sounds. I can tell you that a pop of a Moto2 or MotoGP bike is like a small explosion. Also, at Nurburgring turn1 braking zone, with GT3 cars, the whole grandstand is shaking. Or, standing on top of the Eau Rouge corner, or at the bottom looking up. It's a serious 5 minutes uphill walk, but cars just fly up there in seconds. Also the speeds get to you at certain spots. Feel the earth under your feet rumble. It's just fantastic. btw WRC is totally nuts! :)
7:42 I appreciate the shout out to this guy's talent, I really do, but you are quite wrong. There's a difference of several orders of magnitude between normal driving and this, so much so that a 5 year old knows more about driving a car than a good everyday driver knows about driving at this level. It's insane how different it is, and even with all that talent, it takes another level of human being to have the balls to drive like this on a forest road, over and over again even if it rains or snows.
Great video. Rally is an amazing exhibition of car control and Iron nerves. I've been to a lot of rallies in my home country (Netherlands), but I always freak out when I see these fans in these videos get so close to the track. That sort of thing NEVER happens in here
Jävlar is Swedish yes
Directly translated to "devils" 😅 11:55
@@megatryn It's used more like "hell", but you are right with your direct translation. Direct translations are not very helpful as question is what it mean, not what the word translates to.
@@niclas.lindstrom Functionally, the translation would be more like "shit". But you can't give just the functional translation without the direct translation, cause you cn't say "jävlar" means "shit" or "hell", because it simply doesn't. It functionally is used as those words, but it doesn't mean that.
These cars have massive roll cages and other structural improvements. Especially for the new hybrid systems.
Just to give you an idea: the suspension of the Rally 1 cars (“WRC”, the big boys) are made to withstand around 2 tons of pressure per tire. Otherwise they couldn't land those jumps.
And as mentioned further down: the engine noise it just the engine hitting the rev limiter.
The roll cages on those things are nearly indestructible. That is why they seem so calm in the accidents.
Either the engines rpm reaching absolute maximum or, an anti lag system which is really an afterburner. Like with jet engines well turbofan engines you inject small amounts of fuel into the exhaust for more power, in a turbocharged internal combustion engine it's used to keep the turbo spooled up and is activated by letting off the accelerator pedal. If it wasn't installed you'd have lag as you wait for enough exhaust gases to spool the turbo back up again. The banging sound is the fuel being put into the exhaust manifold and it banging under the immense heat.
1:23 - if the wheels are of the ground the engine is hitting the rev limiter, fuel is cut but the turbo anti-lag kick in to keep the turbo spinning if the driver would like to shift.
3:24 - after some of the jump you’ve seen, are you surprised that wheel will fall of ? 😂
That popping is caused by turbo dumping pressure when the engine hits rev limiter. Engine runs against the limiter and turbo is still making pressure, it has to go somewhere, so its dumbed thrue the waistgate.
Anti-lag system (ALS) is a method of reducing turbo lag or effective compression used on turbocharged engines to minimize turbo lag on racing or performance cars. It works by delaying the ignition timing and adding extra fuel (and sometimes air) to balance an inherent loss in combustion efficiency with increased pressure at the charging side of the turbo. This is achieved as an excess amount of fuel/air mixture escapes through the exhaust valves and combusts in the hot exhaust manifold spooling the turbocharger creating higher usable pressure.
The popping you hear from exhaust is caused by there being fuel left in the cylinder and it burns off in the exhaust. They have their car tuned 'richer' in the fuel to air mix.
I think the the pop pop is a manipulation of fule added to the manifold to retain the turbo boost when you go off the throttle, it is done to decrees turbo lag. There by increasing engine responsiveness.
0:42 its easy, you go where the trees arent😂
That pop pop pop sounds just means u going fast AF boiiii.... 🤣
Rev limiter to answer your question - driver foot to the floor, you leave the ground (or, y'know, change gear) and, yeah.. The other common noise you hear in rally is the wastegate valve, though that isn't that one you're asking about. Also controlling the slide like that, you'd be surprised I think how naturally that happens - I mean I don't necessarily recommend you try, we have experience days for that sort of thing - it's actually surprisingly natural and happens by feel, though it helps a lot if the car is well balanced.
The "pop pop pop" sound often made by rally cars is usually due to a phenomenon called "backfire." Here are the main reasons why this occurs:
1. **Turbocharging and Anti-Lag Systems (ALS)**:
Rally cars are often equipped with turbochargers to increase engine power. To minimize turbo lag, rally cars use an anti-lag system. This system works by injecting fuel into the exhaust when the throttle is released. The resulting explosion keeps the turbo spinning even when the engine is not under load. This process produces the characteristic popping and crackling sounds.
2. **Rich Air-Fuel Mixture**:
Rally cars often run on a rich air-fuel mixture, meaning there is more fuel than necessary for the amount of air present. When this mixture doesn’t completely burn in the combustion chamber, it can ignite in the exhaust, causing popping sounds.
3. **Performance Tuning**:
To maximize performance, rally engines are often tuned for extreme conditions, which can include advanced or retarded ignition timing. These settings can also contribute to the backfire phenomenon.
4. **Exhaust and Noise**:
The exhaust systems on rally cars are often designed to be as free-flowing as possible, which can amplify the noises coming from the engine, including the explosions caused by the phenomena described above.
These elements are designed to maximize engine performance and responsiveness, but they also produce distinctive sounds that have become an iconic feature of rally cars.
At 02:46, I was like he's overcooked that corner, then I had the same reaction as you, didn't know he was going that way 🤣🤣
Hitting the limiter in the air, but more specifically the limiter has to be one that cuts ignition rather than fuel, because in the case of ignition limiter theres still fuel going into the cylinder, but its not ignited there, so it explodes in the hot exhaust instead causing the pops.
the pop sound is the cars anti-lag system which when you release the throtle or brake it keeps the turbo spooled by pushing air into the turbo so on exit of a corner you get full axceleration
The air lift when the cars fly, is caused partly from keeping the throttle down, the wheels spinning in mid air contributes to the front of the car lifting slightly. It's more apparent with a transverse engine 4x4s
That flying car at 4 mins needs a Dukes of Hazzard Dixie horn!
and Daisy Duke
0:05 Sandinavian flick is that move called
0:55 Rev limiter. Your rpm will increase fast to the max when you are flooring the throttle while wheels are in the air.
The wheels are off the ground but the foot is still flat to 5he floor and the engine is trying to save its self from over reving so the engine management cuts the ignition temporarily to keep the rpm under a pre set level.
The pops comes when u lift off the throttle and the timing of spark plug is delayed so the combustion happens when the exhaust valve is open and hence it will spool up the turbo and keep u in boost. Its called ALS anti lag system.
Normally you don't race each other but the clock. There is a time gap between the starts of two cars. They meet only when the first car is very slow or the later car is very fast.
6:05 That's current World Champion Kalle Rovanperä. ; ) Making some extra.
It is called Anti Lag. Fuel keeps the Turbo spinning
6:50 For World Rally Championship, the Rally1 Group cars costs around $1,100,000. That helps.
Most modern rally cars are made with a rigid frame, an engine, a very rigid interior construction with a roll cage, and a mostly plastic or fiberglass body shell looking the same as the car it is based on. That's why these cars can fly and not break. Older cars and more amateur-ish cars are based on the original car, prepped for rally driving. The driving skill of these drivers is insane, going 100+ mph over these bumpy gravel roads and flying around.
5:00 That's called the Scandinavian flick
It originated from when mainly Swedes, of course, drove SAABs that had front wheel drive. They also came up with left foot braking to keep the throttle up in the corners.
Now you ask, why are they doing it with modern cars? And I'm glad you asked:
Both FWD and 4WD are understeering. Hence, it's a bit more difficult to get the ass out (pardon my French). You have to force it a bit more than if you RWD.
It's a version of anti lag. It basically keeps fuel being injected into the turbo and as such backfires repeatedly.
You should check out the 24 hours of le mans next
A lot of these are all-wheel drive, most have squential transmissions and fiddle brakes. The privateer cars are just little front wheel-drive hatchbacks which is why they often wipe-out on fairly easy turns, lose their wheels etc.
The popping is the turbo charger waste gate valve dispersing the excess pressure that not required at that moment.... normally on the overrun
The drift at the 5 minute mark. If you really pay attention, you can see that he completely lets go of the steering wheel so that the forward momentum of the car would straighten the wheels itself.
Why?
Because if he grabbed the steering wheel while the front wheels weren't straight, the car would accelerate to which ever direction the wheels were facing when he tried to grab the wheel.
These guys are on a completely different level haha.
Its not always the revlimiter... in the air it might be, but on the ground they use fuel to keep the turbos spinning. Its called anti-lag and there are a lot of videos on youtube how it worls exactly
The popping is for the turbo, so it stays spooled up. And in the air its the rev limiter you hear
the "ta-ta-ta-ta" is the rpm limiter...the pilot's pushing full gas also during the jumps
the popping is anti lag, keeps turbo spinning to make constant boost
1:15 rpm cut off (limiter)... LE: happens on downshifts too when the speed is not matching the revs in the curent gear
The pop popping can also be overfuelling in the exahust system when they lift off the throttle and the unspent fuel in the exhaust ignites.
Look up anti-lag, it's the hot exhaust gasses re-entering the turbos to create no turbo- lag.