In your animation the air goes in the wrong direction :). Check the air direction at the same system in the animation made by MAN in the following video :) ua-cam.com/video/wg_2E_p6_V8/v-deo.html
You could also technically setup a complicated twincharged system. With a supercharger that disengages at a certain rpm for low end boost as the turbo kicks in. I’ve seen a number of project builders accomplish this with too much time and money 🤣
Shit I commented too soon. I meant twin charging where the supercharger feeds the engine at low rpm, then a turbo at high rpm. Not *compound* charging where one device runs another.
The impeller in the super charger at 9:10 has its blades facing the wrong way, you can't really tell what way its turning because its animated so quickly but I would assume its also wrong.
Jachin Rivers it is a respectably concise sequential expounding of the flow of cause and effect in relation to engin purpose~evolution. Although posessing an above average attention span(due to covid lockdown) I am average and ignorant person. As such; this meticulous and well polished breakdown is appreciated expounding. It is unfortunate that *Emotional Constipation* distracts most minds into fickle vanity~insecurity that makes them express mama like nonsens ie. Eric Hansen: "Over complicated is the word you are looking for..." He can't even count; over complicated = two word, nit "the word" aka "single word." Pure *Emotional Constipation.*
I've been a mechanic for over 12 years so I know most of the information provided in this video, but I enjoy watching videos like these just to broaden my understanding of the automotive world and you never know you might learn something. This is by far the best visual and in depth accurate video (excluding the one part) I've seen made about a subject surrounding automobiles. Fantastic video 👍
I'd REALLY like to see a setup using three turbochargers in a series compounding configuration, with the largest performing the role of "Altitude Compensation"
Everyone's nitpicking about the air flowing the wrong way at 5:25, I'm more interested in the guy at 14:34 who is queueing for petrol with his lawnmower.
Fuel Crisis in the 70's. A limited supply of imported oil caused an inadequate supply of petrol for the public. The cars line is so long due to only a limited amount available for each customer, say 3~5 gallons. He is queuing with his mower because you were not allowed to fill a can at all. You were not allowed to fill a mower if it was in your car as that would be your entire entitlement for that car on that day.
I enjoy these videos because: A) No distracting music, B) Pure facts and figures, C) No flowery "chic" terms or phrasing, D) Interesting subject matter that is relevant to modern life. Thank you for keeping it "simple"...so to speak.
All I've ever known about FI was contained in this presentation, combined with twice as much stuff I didn't know ALONG with the history... I wish I could like this twice
The video contained info I picked up over the years one bit at a time. Plus a new bit, where they cut the ignition so unburned fuel goes into the exhaust and ignites there and spins the turbo. We used to do a trick on our bikes where we went full throttle, cut the ignition (thumb switch), filled the exhaust with air/fuel mixture, then thumbed the ignition back on. This ignited all the fuel in the exhaust at once and exploded like a quiet gunshot. Doesn't work on EFI. '(
Yeah... noticed that too... and The turbo is turning the wrong way also. The rotor turns from the larger cross section of the volute to the smaller cross section. It's the opposite for the hot turbine section.
Hey @New Mind. I know you might not see this but if you do, thank you for the hard work you do with these videos. I am currently getting ready to go to University for Mechanical engineering and your videos gave me even more confirmation that I am making the right decision. You are an inspiration and you should keep up the hard work!!!
@@ThePlaystationgames1 awesome! In all honesty there will be rough patches but anything worth having we gotta work for. Just keep in mind that those down times are temporary even if you can't immediately see your way out. It'll pass. In terms of practical things though, it's all about time management. Grades are important but so(and possibly even more) is the network you build. Get involved but not at the expense of your education likewise don't shun extracurriculars chasing decimal points. You won't always be on the ball, I regularly fall off track but for as cheesy as it sounds, it's really those of us who can consistently get back on our feet that move forward. Second year is generally the toughest year not just because of course difficulty but because it forces us to find that balance. Depending on where you are it's designed to weed out the less resilient of us. I don't doubt you Internet stranger so best of luck in your journey!
The pumped airflow is the Opposite way in the animation of the rootsblowerpump. The lobes move the air on their outsides up, not down between them as drawn
I hauled fuel for 25 years. Idiots at fuel pumps isn't limited to 1 gender. People have zero respect for fuel until overflows and ignites under their vehicle with the spouse and kids in it.
Seems like ever pump that has a diesel nozzle on it is covered in fuel. The pump and the ground around it is covered in fuel. I know diesel doesn't evaporate away like gasoline but how does it get their in the first place. I'm convinced that diesel users are absolutely animals when they refill the tank. They can't take 10 seconds to allow the fuel to finish draining out of the nozzle before pulling it out and getting it everyplace. I try to avoid the split pumps when getting gas as it never fails to get diesel all on the bottom of my shoes which I get to smell for the next hour or two. Maybe the pumps ALL suck and drip like an old man? Not sure..
@@ohioplayer-bl9em It's a combination of both of those things. sometimes the valve does not close completely when you let the handle loose. I've had diesel pumps sit there and just continuously dribble no matter how long you waited. I've had a few where you grab the pump handle and as you're trying to put it into the gas filler a whole bunch of fuel dumps out because it's been filling up that nozzle the whole time. I've had it happen at gas pumps also. But as you mentioned sometimes it's just impatience and people don't wait the 5 seconds or so it takes for the fuel to drain out
The illustrations show the air taking the wrong path through the rotors. It actually goes around the outside and the meshing rotors seal the air down. There is no room for displacement between the rotos it therefore has to use the volume of the shape of the mating parts. Great video. Thank you.
The Roots system is also used in metering natural gas at higher flow rates. For normal domestic metering, from 250 cfh to 1000 cfh, we usually use positive displacement diaphragm meters that use internal diaphragms to inflate and deflate, measuring the gas volume and turning a counter to show usage. This is then billed to a customer at a known pressure, adjusted for temperature. At higher volumes, 2m cfh to 56m cfh, we will use Roots style meters. They still work off of the positive displacement principle, yet the rotating assembly has a higher volume permission than a diaphragm design and do well at measuring large volumes of gas. They also aren’t restricted to the lower pressures of diaphragm meters, and some are used at upwards of 200 psig. This allows high pressure/volume through the meter, which a customer can then regulate down for their specific applications.
This channel has been exactly what I've been missing due to seeking more understanding in the field which I'm most passionate about. Most automotive pages brief upon many subjects but go on to say this is a basic understanding. This information is digestible and in depth , thank you
I wish i knew this channel when I actually studied these things in engineering. this is the most detailed yet lucidly explained video I have seen till date. kudos!!
Also 6:55. I swear, even later with centrifugal superchargers and turbochargers; the impellers illustrate correct vane geometry, but appears the same backwards rotation. It's all a clever ploy to drive comments.
I had an Olds 442. It had the standard ring air filter that pulled air from the engine bay. Very inefficient. I installed a K&N cold air box that pulls air from the outside and uses a high flow filter. The difference in performance was stunning. I would wager that I gained 30 or more HP and just a smoother running engine. Amazing
Thanks very much, I have searched all over for an overview of what makes modern small turbos in automobiles different from their predecessors. This is the only overview I’ve ever found. Thanks! Would be very interesting to see an overview of one particular engine, such as a budget compact car like the Chevy Aveo for example.
It’s a damn shame this video didn’t perform better. This video is amazing. I’ve always been fascinated by forced induction and I’ve never seen such an in depth, well put together video. I throughly enjoyed it.
big car nerd here, glad to see New Mind cover this. i think the worksmanship of this video can be summed up by the almost 4 minute intro. excellent stuff
23:45 that's backwards. The large turbo feeds the small turbo. The compressed inlet charge increases the flow capacity of the small unit. Also a small nuance, you said that lowering the compression ratio decreases the thermodynamic efficiency of the engine. While it's true that high boost levels require lower static compression ratios, the dynamic compression ratio is much higher so the thermodynamic efficiency of the engine is higher. Think of it as the air gets compressed, then cooled, then compressed again, meaning you can have a much higher compression level before detonation temperatures are reached. Otherwise this is a surprisingly accurate video. You've clearly done your research.
Agreed Brian. One could also think of it like a gas turbine like a twin or triple spool turbofan. N1 is larger than N2, and N2 is larger than N3 (if a triple spool engine).
Yeah I don't know why so many supercharger animations are backwards, the rotors go away from each other from the perspective of the intake 🤷♂️. worked and all types of drag racing, literally and never saw one spin backwards- the weird part is I have heard people did that are running or working on a screw blown / roots blown applications and say they spent towards each other when they clearly don't on the engine they are running.. not too many but too many LOL
Obvously a turbo guy, I have a Twin Screw sitting a few feet away from me and am a little sad it got the least attention. Im glad you mentioned volumetric efficiency.
As a rider with a charge cooled aftermarket belt driven centrifugal supercharger (hayabusa/rotrex) I found your video extremely informative. Many thanks for detailed explanation. Add 1 sub from England 🇬🇧
I’m fascinated by this. I also find it interesting the technology that’s come along recently. Direct Injection and Exhaust Gas Recirculation can make efficient and powerful modern engines.
This was actually very well done. Bravo. Only critique: 17:10 - Turbos are not just RPM dependent. They are also load dependent. This is why redlining in neutral builds no boost but flooring it at low RPM can. For best results, it takes both.
the people who wrote the book on boost, especially on gasoline engines were aircraft engine designers in WW2. Money was no object, and they threw everything at getting boost up to its maximum while managing detonation and fuel consumption. They invented two stage supercharging, intercoolers, super high octane fuels ( 130 octane at end of war) and then ventured into water/methanol injection in some cases. Allison even mated a supercharged engine to a power recovery turbine to reach amazing efficiencies and power output.
Twin Scroll and GMs recent Twin Volute systems are great advancements in TC. Toyota/Lexus uses both port injection with direct injection and VVT to operate in a modified Atkinson cycle at times. The tech that is going into these modern 4 cylinders is truly remarkable. They are compact efficient powerful and simpler in some ways.
The turbo corvair went form late 62' until 66", which I think is a bit more then a year. The complaint that really killed it was not its reliability but its cost.
The narrator and producer of this vid have likely never turned a wrench or had grease on their hands. Go see Richard Holdener's channel if you want to learn about forced induction from someone with years of actual experience, he has a multitude of hands on video's and tests along with years of dyno tests and numbers for every engine and combination imaginable.
Imagine how many more technology interested people there would be if presentations of this quality would have been shown in highscool history lesson? They should show a variation of this every week. for instance the history of transistor, or some kitchen appliance and so on.
the best video for the beloved turbo amazing work . i want to add a couple of things the split turbo and the electic turbo ,the first has has the cold side and the hot side of turbo splited and the benefit is the hot side doesnt increases the temp of the cold air that is coming in the cold side so way more air can come to the system(first manufacturer is Mercedes ) and the second is a small turbine that is driven by electricity to send air to the way bigger normal turbo so it doesnt have lag(first manufacturer Audi/VAG) :)
In the animation of the supercharger, the air (or vanes) is (are) moving the wrong direction relative to each other. In the animation you have, if the vanes were turning as shown, the air would be moving up (discharge would be on top)
And at 29:14 that housing is for clockwise flow but the impeller is for counter clockwise flow. at least you got the air moving in the right direction that time lol
the animation of the roots rotors spinning is spinning backwards. they spin the other way and air is compressed between the casing wall and the lobes and not each other. this is why the higher volume is achieved
Awesome in depth explanations! With all due respect.. fuck the people who are complaining about animations. Make your own video if your this big of an expert
Rotary engines (naturally aspirated) can be up to 130% volumetric efficiency due to the dynamic charging of the rotors' intake ports opening and closing.
very good video,plenty of information just one small nitpicking - twin turbo setup is a pair of idential chargers- and a pair of smaler and biger turbos are called biturbo
Check out this related video on how oxygen sensors work - ua-cam.com/video/KIF8P2J1CeE/v-deo.html
In your animation the air goes in the wrong direction :). Check the air direction at the same system in the animation made by MAN in the following video :)
ua-cam.com/video/wg_2E_p6_V8/v-deo.html
One caveat. Turbochargers don’t generally use engine coolant for temperature stability, but the oil. Turbos get far too hot to use the coolant.
You could also technically setup a complicated twincharged system. With a supercharger that disengages at a certain rpm for low end boost as the turbo kicks in. I’ve seen a number of project builders accomplish this with too much time and money 🤣
Shit I commented too soon. I meant twin charging where the supercharger feeds the engine at low rpm, then a turbo at high rpm. Not *compound* charging where one device runs another.
Also, compound low/high sequential compressors is common in diesels too
The animation of the roots supercharger at 5:25 has the air flowing the wrong way.
Or, well, the rotors rotating in the wrong direction.
The animation of the twin screw compressor is also completely wrong 7:14
The impeller in the super charger at 9:10 has its blades facing the wrong way, you can't really tell what way its turning because its animated so quickly but I would assume its also wrong.
Yep: turning in the wrong direction. And the air doesn't go through straight.
oh i was so confused... how would the air compress so much to fit in between the rotors
This is the most in-depth explanation of forced induction I've ever seen.
Over complicated is the word you were looking for...
Jachin Rivers it is a respectably concise sequential expounding of the flow of cause and effect in relation to engin purpose~evolution.
Although posessing an above average attention span(due to covid lockdown) I am average and ignorant person. As such; this meticulous and well polished breakdown is appreciated expounding.
It is unfortunate that *Emotional Constipation* distracts most minds into fickle vanity~insecurity that makes them express mama like nonsens ie. Eric Hansen:
"Over complicated is the word you are looking for..."
He can't even count; over complicated = two word, nit "the word" aka "single word." Pure *Emotional Constipation.*
@@linyenchin6773 bruh
@@linyenchin6773 damn you burned him good and proper.
Seriously!!!!!
25:07 the WRX ejected its foglight cover. That's a +5hp net gain.
speed holes :D
I've been a mechanic for over 12 years so I know most of the information provided in this video, but I enjoy watching videos like these just to broaden my understanding of the automotive world and you never know you might learn something. This is by far the best visual and in depth accurate video (excluding the one part) I've seen made about a subject surrounding automobiles. Fantastic video 👍
I'd REALLY like to see a setup using three turbochargers in a series compounding configuration, with the largest performing the role of "Altitude Compensation"
Everyone's nitpicking about the air flowing the wrong way at 5:25, I'm more interested in the guy at 14:34 who is queueing for petrol with his lawnmower.
Also, this is a great video! Keep it up!
Fuel Crisis in the 70's. A limited supply of imported oil caused an inadequate supply of petrol for the public. The cars line is so long due to only a limited amount available for each customer, say 3~5 gallons. He is queuing with his mower because you were not allowed to fill a can at all. You were not allowed to fill a mower if it was in your car as that would be your entire entitlement for that car on that day.
@@dazaspc Thanks! Makes sense now! I would have just let my lawn grow, but I'm just lazy!
How about the lady in the beginning who pulled the nozzle out while it was still pumping.... 🤣
@@stagehits this was the generation of “both ways through the snow and jungle to get to school”
They wanted it more than we do lmao
I enjoy these videos because: A) No distracting music, B) Pure facts and figures, C) No flowery "chic" terms or phrasing, D) Interesting subject matter that is relevant to modern life. Thank you for keeping it "simple"...so to speak.
All I've ever known about FI was contained in this presentation, combined with twice as much stuff I didn't know ALONG with the history...
I wish I could like this twice
Basically nothing on F1 MGUH though. Those hybrid systems are stunning. Zero lag.
The video contained info I picked up over the years one bit at a time. Plus a new bit, where they cut the ignition so unburned fuel goes into the exhaust and ignites there and spins the turbo.
We used to do a trick on our bikes where we went full throttle, cut the ignition (thumb switch), filled the exhaust with air/fuel mixture, then thumbed the ignition back on.
This ignited all the fuel in the exhaust at once and exploded like a quiet gunshot.
Doesn't work on EFI. '(
yeah as others have also said the blower is turning the wrong way, the air goes around the outside
Was about to say the same thing 🤣
Yeah... noticed that too... and
The turbo is turning the wrong way also. The rotor turns from the larger cross section of the volute to the smaller cross section. It's the opposite for the hot turbine section.
I love the longer format and the amount of detail you went into. You make great videos, keep it up!
Hey @New Mind. I know you might not see this but if you do, thank you for the hard work you do with these videos. I am currently getting ready to go to University for Mechanical engineering and your videos gave me even more confirmation that I am making the right decision. You are an inspiration and you should keep up the hard work!!!
How's it coming along? I'm in my 3rd year ;)
I'm two semesters in banging out my core classes. Any advice for me?
@@ThePlaystationgames1 awesome! In all honesty there will be rough patches but anything worth having we gotta work for. Just keep in mind that those down times are temporary even if you can't immediately see your way out. It'll pass.
In terms of practical things though, it's all about time management. Grades are important but so(and possibly even more) is the network you build. Get involved but not at the expense of your education likewise don't shun extracurriculars chasing decimal points.
You won't always be on the ball, I regularly fall off track but for as cheesy as it sounds, it's really those of us who can consistently get back on our feet that move forward. Second year is generally the toughest year not just because of course difficulty but because it forces us to find that balance. Depending on where you are it's designed to weed out the less resilient of us. I don't doubt you Internet stranger so best of luck in your journey!
The pumped airflow is the Opposite way in the animation of the rootsblowerpump. The lobes move the air on their outsides up, not down between them as drawn
Even though i already knew this, this was still super interesting and so well explained! Best explaination of forced induction i have ever seen
0:15 wtf??? What the hell is she doing, how is someone able to spill that much gas??
haha! Diesel.. But yeah, give her some slack, doesn't know how to shake it like a guy!
She's on her phone
I hauled fuel for 25 years. Idiots at fuel pumps isn't limited to 1 gender. People have zero respect for fuel until overflows and ignites under their vehicle with the spouse and kids in it.
Seems like ever pump that has a diesel nozzle on it is covered in fuel. The pump and the ground around it is covered in fuel. I know diesel doesn't evaporate away like gasoline but how does it get their in the first place. I'm convinced that diesel users are absolutely animals when they refill the tank. They can't take 10 seconds to allow the fuel to finish draining out of the nozzle before pulling it out and getting it everyplace. I try to avoid the split pumps when getting gas as it never fails to get diesel all on the bottom of my shoes which I get to smell for the next hour or two.
Maybe the pumps ALL suck and drip like an old man? Not sure..
@@ohioplayer-bl9em
It's a combination of both of those things. sometimes the valve does not close completely when you let the handle loose. I've had diesel pumps sit there and just continuously dribble no matter how long you waited. I've had a few where you grab the pump handle and as you're trying to put it into the gas filler a whole bunch of fuel dumps out because it's been filling up that nozzle the whole time. I've had it happen at gas pumps also. But as you mentioned sometimes it's just impatience and people don't wait the 5 seconds or so it takes for the fuel to drain out
Srsly dude. Kudos to you. This is some HIGH QUALITY content.
Dis sum good chit
pretty animations =/= high quality *content*
The illustrations show the air taking the wrong path through the rotors. It actually goes around the outside and the meshing rotors seal the air down. There is no room for displacement between the rotos it therefore has to use the volume of the shape of the mating parts. Great video. Thank you.
This is impeccably well researched and brilliantly articulated.
The Roots system is also used in metering natural gas at higher flow rates. For normal domestic metering, from 250 cfh to 1000 cfh, we usually use positive displacement diaphragm meters that use internal diaphragms to inflate and deflate, measuring the gas volume and turning a counter to show usage. This is then billed to a customer at a known pressure, adjusted for temperature. At higher volumes, 2m cfh to 56m cfh, we will use Roots style meters. They still work off of the positive displacement principle, yet the rotating assembly has a higher volume permission than a diaphragm design and do well at measuring large volumes of gas. They also aren’t restricted to the lower pressures of diaphragm meters, and some are used at upwards of 200 psig. This allows high pressure/volume through the meter, which a customer can then regulate down for their specific applications.
This channel has been exactly what I've been missing due to seeking more understanding in the field which I'm most passionate about. Most automotive pages brief upon many subjects but go on to say this is a basic understanding. This information is digestible and in depth , thank you
I have too spracharged cars and one turboed. I learned a lot and will tell all my other friend in 6 October to watched and learned!!
What a wonderful presentation and information- since the beginning of your channel I knew you’re a car guy , now I’m sure 👍🏼 keep em coming
How does this channel not have more than a million subscribers? New Mind has some of the best content on UA-cam!
Engineer for a major engine company here- best presentation on forced induction I’ve seen.
I wish i knew this channel when I actually studied these things in engineering. this is the most detailed yet lucidly explained video I have seen till date. kudos!!
This is single-handedly the best video that explains boost supercharging turbocharging hyper charging whatever charging you like
Great vid champ! 🍻
The animation at 5:10 is wrong, the rotors spin backwards compared too the airflow
that's not true
Maybe you need to hold your phone upside down
Indeed! This is a better animation ua-cam.com/video/r4v2AxUPLsY/v-deo.html
i was about to comment on it. The air pases throught the outside (close to the wall) so in that animation it goes up
Also 6:55. I swear, even later with centrifugal superchargers and turbochargers; the impellers illustrate correct vane geometry, but appears the same backwards rotation. It's all a clever ploy to drive comments.
I’m super impressed by the animations. Looks so goood.
You got the roots supercharger pump rotation backwards
I had an Olds 442. It had the standard ring air filter that pulled air from the engine bay. Very inefficient. I installed a K&N cold air box that pulls air from the outside and uses a high flow filter. The difference in performance was stunning. I would wager that I gained 30 or more HP and just a smoother running engine. Amazing
Thanks very much, I have searched all over for an overview of what makes modern small turbos in automobiles different from their predecessors. This is the only overview I’ve ever found. Thanks! Would be very interesting to see an overview of one particular engine, such as a budget compact car like the Chevy Aveo for example.
It's a shame this channel has not more subs/views. I just cannot get enough of this
It’s a damn shame this video didn’t perform better. This video is amazing. I’ve always been fascinated by forced induction and I’ve never seen such an in depth, well put together video. I throughly enjoyed it.
This is literally the gold standard for educational videos on FI
big car nerd here, glad to see New Mind cover this. i think the worksmanship of this video can be summed up by the almost 4 minute intro. excellent stuff
Problem solved: The animation crisis portion was filmed on a mirror.
that doesn't solve anything
@@w0ttheh3ll Check the rotation of the rotors and you will figure out why this vid is nonsensical.
Bejeez! I only had two beers! I thought I was totally drunk! Everything was working opposite to an apple falling off a tree.
@@bryankirk3567 I know that the video is wrong. My statement was that mirroring wouldn't make it right.
Sincere thanks for this amazing material
23:45 that's backwards. The large turbo feeds the small turbo. The compressed inlet charge increases the flow capacity of the small unit. Also a small nuance, you said that lowering the compression ratio decreases the thermodynamic efficiency of the engine. While it's true that high boost levels require lower static compression ratios, the dynamic compression ratio is much higher so the thermodynamic efficiency of the engine is higher. Think of it as the air gets compressed, then cooled, then compressed again, meaning you can have a much higher compression level before detonation temperatures are reached. Otherwise this is a surprisingly accurate video. You've clearly done your research.
Agreed Brian. One could also think of it like a gas turbine like a twin or triple spool turbofan. N1 is larger than N2, and N2 is larger than N3 (if a triple spool engine).
Wastegates, externals, and blow-off valves explained in a scientific level not seen before. Outstanding!
oh my god these videos are so good. one of the most under rated content on yt.
5:05 the air is actually going in oppostie direction than in this model.
Haha, I didn't catch that at first. Nice.
now makes sense
Yeah I don't know why so many supercharger animations are backwards, the rotors go away from each other from the perspective of the intake 🤷♂️. worked and all types of drag racing, literally and never saw one spin backwards- the weird part is I have heard people did that are running or working on a screw blown / roots blown applications and say they spent towards each other when they clearly don't on the engine they are running.. not too many but too many LOL
the way you present it,,, man, u're absolutly briliant.
i really admire you, a lot.
Ive been binge watching your videos all Sunday morning. They are second two none 👍
Love the whine of a roots blower!!
BOOST = LIFE
Thank you soo much for making this wonderful video. One of the best examples I have seen.
This is a superb content. Before this I was a noob not even knowing what turbo means in engines.
Obvously a turbo guy, I have a Twin Screw sitting a few feet away from me and am a little sad it got the least attention.
Im glad you mentioned volumetric efficiency.
the air is going the wrong way in the animation at 5:40.
Appreciate you kindly allow this review.
As a rider with a charge cooled aftermarket belt driven centrifugal supercharger (hayabusa/rotrex) I found your video extremely informative.
Many thanks for detailed explanation.
Add 1 sub from England 🇬🇧
Easily the best video I've seen on this topic.
Powerband explained in the first minute. Thank you.
the chad jet turbine engine: when your entire engine is one giant turbocharger because you want ALL the boost
I’m fascinated by this. I also find it interesting the technology that’s come along recently. Direct Injection and Exhaust Gas Recirculation can make efficient and powerful modern engines.
Those are old technologies as well... EGR is around since the 1970s. Direct injection since WW II (airplane engines) if not before.
The animation at 5:30 is backwards. That's a twin screw supercharger. A roots spins the other way against the case.
Well, to me, this explained a lot of the technical terms used in Initial D;
thanks mate.
Great explanation thanks. There is even more to describe twin charged setups please. I have done it and its awsome! Complex yes, but zero lag!
This was actually very well done. Bravo. Only critique: 17:10 - Turbos are not just RPM dependent. They are also load dependent. This is why redlining in neutral builds no boost but flooring it at low RPM can. For best results, it takes both.
Love the videos! Always great for a long watch!!
Great video, easily the best on youtube covering all bases except the new electronic wastegates
Realy nice animations you have, the quality is really good.
the people who wrote the book on boost, especially on gasoline engines were aircraft engine designers in WW2. Money was no object, and they threw everything at getting boost up to its maximum while managing detonation and fuel consumption. They invented two stage supercharging, intercoolers, super high octane fuels ( 130 octane at end of war) and then ventured into water/methanol injection in some cases. Allison even mated a supercharged engine to a power recovery turbine to reach amazing efficiencies and power output.
Twin Scroll and GMs recent Twin Volute systems are great advancements in TC. Toyota/Lexus uses both port injection with direct injection and VVT to operate in a modified Atkinson cycle at times. The tech that is going into these modern 4 cylinders is truly remarkable. They are compact efficient powerful and simpler in some ways.
This is damn near encyclopedic! Very impressive.
The turbo corvair went form late 62' until 66", which I think is a bit more then a year. The complaint that really killed it was not its reliability but its cost.
It's weird that I simultaneously feel like a supercharger/turbocharger expert and also like I don't know anything about anything.
This comment is on point
This guy did his homework for sure!!!! Just wish my brain could absorb half of this information lol,,,,, great video!!!!!!
Exceptional quality as always
3:59 OMG THAT WAS JUST THE INTRO!!! HOLY CRAP THAT'S AMAZING!!!!!!!! I GIVE YOU MAD PROPS
The narrator and producer of this vid have likely never turned a wrench or had grease on their hands. Go see Richard Holdener's channel if you want to learn about forced induction from someone with years of actual experience, he has a multitude of hands on video's and tests along with years of dyno tests and numbers for every engine and combination imaginable.
Like the old knuckle draggin street rodders used to say: "Injection is nice but I'd rather be Blown".. Now you can get the best of both worlds! : )
That was awesome! What a great learning experience this was for me!!!
Imagine how many more technology interested people there would be if presentations of this quality would have been shown in highscool history lesson? They should show a variation of this every week. for instance the history of transistor, or some kitchen appliance and so on.
I am addicted to your videos
the best video for the beloved turbo amazing work .
i want to add a couple of things the split turbo and the electic turbo ,the first has has the cold side and the hot side of turbo splited and the benefit is the hot side doesnt increases the temp of the cold air that is coming in the cold side so way more air can come to the system(first manufacturer is Mercedes ) and the second is a small turbine that is driven by electricity to send air to the way bigger normal turbo so it doesnt have lag(first manufacturer Audi/VAG) :)
25:03 that subie is literally falling apart 😂
Most sophisticated video on forced induction on youtube. Many thanks
Brilliant complete video. So much info.
The roots animation is spinning in the wrong direction
Mo powa baby!
Beat me to it haha
Pop up and down headlights!
one of the best channels on youtube
Wow! More Air + Fuel? Science! Brilliant.
Excellent training video to show students 👏
Wow, great explanation and history
Why can't I like this more than once 😭
In the animation of the supercharger, the air (or vanes) is (are) moving the wrong direction relative to each other. In the animation you have, if the vanes were turning as shown, the air would be moving up (discharge would be on top)
For once an utterly brilliant lesson 🙏🙌
Exceptionally documentary very well presented top work and quality
More than I was curious about
Awesome, beautiful!!! Not a better explanation of this out there!
Great video!!
Wrong way airflow in demo threw me off
This was actually interesting. Good work!
5:10 and 7:07 the air is flowing backwards given the rotation direction depicted in these models
7:35 also
And at 29:14 that housing is for clockwise flow but the impeller is for counter clockwise flow. at least you got the air moving in the right direction that time lol
the animation of the roots rotors spinning is spinning backwards. they spin the other way and air is compressed between the casing wall and the lobes and not each other. this is why the higher volume is achieved
I loved this video brother. Post another! Please amplify on the terms "Compound", and especially "Turbo-Compound".
The four minute title pop, it’s like a movie!
Very good video with a solid cross-section of engine boost tech and narrated succinctly! Great job!
Except almost every example is running backwards,
in some way.
steve
Your roots supercharger is spinning backwards. The air travels around the outside of the case.
Awesome in depth explanations!
With all due respect.. fuck the people who are complaining about animations. Make your own video if your this big of an expert
Rotary engines (naturally aspirated) can be up to 130% volumetric efficiency due to the dynamic charging of the rotors' intake ports opening and closing.
very good video,plenty of information
just one small nitpicking - twin turbo setup is a pair of idential chargers- and a pair of smaler and biger turbos are called biturbo
Extreamly well done!!!