It stalls sideways because the wheels have stopped turning ! It’s lost its forward momentum, at low rpm you have practically no torque available from the motor, it’s not a diesel engine & you have a huge flat spot in the power.
It’s a traditional manual transmission. When the clutch is engaged you can’t just stop. I know he put that Revo transmission in but that doesn’t change the direct drive nature of the setup.
No, the carbs are losing their prime because there's no tank pressure. The diaphragm pumps on the carbs depend on intake pulses to function, and at high rpm the pulses are too close together to provide sufficient volume. That's why you have run a line from the muffler to pressurize the tank. This is done on a lot of RC planes as well for the same reason.
For curiosity sake since I'm not a mechanic or engineer or mechanically incline... would a check valve "back flow preventor" work similar to plumbing applications?
It would actually reduce the engine RPM; plus he's already burning out clutches on the flywheel he has, so this might not be a good idea. The comments above about pressurizing the fuel tank with the exhaust is probably an easier solution and won't require any additional modification. Seems to me like the system is losing fuel flow to the dual carb setup in a tilted position which is very indicative of low fuel pressure.
@@someonesomewhere_777 A heavier flywheel will not reduce engine RPM. It WILL slow engine response due to more inertia, which is why a lightened flywheel is a common performance modification. The downside to a light flywheel is a tendency for the engine to lose RPM quickly...sometimes so quickly that it dies. Which is what might be happening here. Slowing engine response will not hurt the clutch. If anything, it will increase clutch life due to more gradual changes in RPM. Johnny has a lathe and a mill - adding weight to the flywheel shouldn't be a big deal (if that in fact is the problem).
Same, he's very talented with everything he makes for these cars. The new engine he just showed, the orange one that made by a different company, seems like it would be way better in this.
If you think it’s fuel sloshing make baffles in the tank to reduce the liquid movement. And also the low rpm if you throw the drift tire with a plastic sleeve you can draw your conclusion of fuel loss and or rpm being to low
The effort and determination of this guy is insane. Every time I see one of your video's in my for you page I don't even hesitate to click on them. I am proud to be one of your 1.87M subscribers!
My guess is rotor shaft flex and the tolerances of the supercharger synchro gears: -That tri-lobe rotor looks to be a 3D ratio, with 3 segments I doubt it has the rigidity to stay straight under boost. -The synchro gears would need to have insanely tight tolerances and sub tenth backlash to maintain the lobe seal with such small gears/rotors. Even operating with a wet seal design. -If you do decide to make your own rotors, may I suggest a helical tri-lobe.
U could cut a two slots into the metal, to maintain balance of the clutch and into the friction material, and use two dowel pins plus a lil glue to keep it from delaminating!! Just a thought!! Keep it up, love the Vidz!!!!
i think part of the reason it stalls when u slide is causee the engine just doesent have enough energy to keep going when the wheels slow down after a slide. real cars do the same if u spin and dont disengage the cluch
I would love to see new rotors for the supercharger!! There's so many videos out there with little superchargers and turbochargers for micro engines like this and none of them ever work. it's so sad I want to see one that works. you can do it!!
The scoring on the inside of the supercharger housing looked like it was towards the center, so the rods holding the rotors might be bowing from a slight imbalance when they spin fast enough. Someone mentioned one-piece rotors, so that might help a rigidity issue. If that's what's actually happening.
At first I was worried JohnnyQ90 wasn't devulging that he is sponsored by Toyan or Sterling Kit, and that he actually gets all these engines for free. You're supposed to let people know if you're sponsored. To be honest, though, I think these videos have made me want these small engines less and less the more of them I see. Imagine spending $1700 on this "supercharged" V8, plus everything else needed to get it to run (and even more if in an RC chassis), and the thing just breaks almost immediately because of terrible manufacturing and tolerances. I'll stick with enjoying watching someone else spend tons of money on getting them to work right.
I don't mind he's sponsored or not. I love the creative process in his videos. I think he does a great job. I love watching all of the unique machining parts and 3D printed parts. Those engines seem on the surface really awesome but I can tell they break catastrophically really easy, the tolerances in the machining process are probably not good at all even though it "looks" good. Being sold extra attachments like superchargers that actually hinder and hurt the motor instead of actually giving more power. You would have to have a bunch of expendable income and enjoy this as a hobby because these motors seem like they're really low quality and horribly made and unreliable.
I agree with a lot of these comments about the stalling issue. I’m leaning towards the idea that was mentioned about the clutch being still engaged while the car comes to a complete stop. That would definitely stall my car at least. That also probably played a roll in the clutch breaking. If it’s a fuel issue though, my suggestion is try a bigger fuel line, and a carb bowl if they don’t already have one. The bigger line will keep it from hydro locking, and the bowl will help with whatever air still gets through. As for the super charger I’m on team solid rotors lol. Those have to be one, solid, smooth piece to get rid of the slap. They have way too much wiggle being three pieces each. In other news; line lock? Totally unnecessary and would probably destroy the transmission but man would it be cool if it worked. Just sitting there roasting the tires and then turning it off and peeling away. As always, love the video. Keep up the awesome work, and I can’t wait for the next one.
Real cars also can stall during a slide like that; if you let off the gas when it's fully sideways, the wheels aren't rolling forward, so the engine will stall. You need to put in the clutch when the car gets too sideways or else keep the throttle on so the wheels don't stop turning.
I've been waiting for this video for so long and I'm glad it's finally here. But also I can see it needs some refinements in the power band, especially in the low rpm, knowing your potential it would be amazing to see you make turbos like you did for the twin cylinder 4-stroke, but have two different sized turbos and connect them in a compound setup so that way you can get the most torque down low and horsepower up high.
Dry sump tanks in race cars are tall to prevent the oil pick up in the bottom from being uncovered. You need to do the same with your fuel tank; taller talk will prevent the pick up from pulling air. Great work!!!
Johnny, on nitro engines, we have to apply pressure to the fuel tank via a line from the exhaust. The impulses form the exhaust muffler pressurize the fuel tank.This will keep fuel flowing to the carbs and prevent leaning out due to fuel slosh.
It would be interesting to spin the supercharger at operating RPM without the engine, to see how much air it moves. I think these tiny engines are too small for forced induction to work properly. And I think the tolerances are probably just good enough for them to run, I think any substantial level of boost would bend things or just end up being lost as blow by. I'd love to be proven wrong, though. "2 Stroke Stuffing" gets an astounding amount of power out of a 50cc engine, but that's only one cylinder, and it's actually designed for vehicular use.
It has a terrible understeer, the car doesn't want to turn. And if you apply too much power, it immediately oversteers. I suggest you check your differential (if exists) . This issue causes extra load to your engine and clutch while turning. The car came from a long way, and I love how you build it with great effort and create quality content. Keep on, friend across the pond!
its been more than 2 years followed you and i'v seen this little thing grew and now its 90% finished i am so proud of you. gg and continue let's go to the 2mill
can you please explain why you measured the rpms when determining if the supercharger actually did something? shouldn't they stay the same due to the gearing? i'm genuinely curious, i'm new to the world of rc cars
Obviously adding any kind of boost, will not increase the rpm of an engine. What I did, was to show how easily the engine performed N/A (1,100rpm), but with the supercharger it reached slighly lower rpm, which to me, is an indication that it didn't actually do anything, as it should have the same rpm as in N/A form. Even if the supercharger was adding any power, it wouldn't be for too long, as it started self destructing.
So freakin cool bud. That definitely has some power. It sure is nice to have that starter on the remote. I used to have to run up and pull start mine lol. But it was also a 1 cylinder tiger 21 motor. I think thats what it was called. This is just too cool bud. Well done.
@JohnnyQ90 - just a thought: set up the throttle and clutch actuations on the same servo (or multiple servos from the same channel) - as you give it more throttle, the clutch starts to engage, and as you let off, the clutch disengages. This would take an incredible amount of fine tuning, but I’d imagine would work extremely well, but still provide that realistic functionality you’re looking for.
Also, it shuts off becasue you need a baffle in the tank(possibly even the carburetor bowls). The G forces involved in that turn are preventing fuel from feeding the carb.
I think the stalling is many things at the same time. - low torque at low rpm. You either need to have the clutch slip or do a burnout to maintain enough engine rpm. Your lose all speed forward which forces the wheels to stop. You don't have enough gears in the gearbox to help keep the engine rpm. - add some baffles in the tank - consider some exhaust to add fuel pressure. Great video. But maybe not so great for the supplier of the compressor. It did have issues even before you installed it, being silent in only one direction. They need to step up their manufacturing quality and testing.
I'd add a baffled fuel cell to the list too, maybe put some foam in there and or make something custom with a baffled swirl pot built into it, the sort of thing you see on drag cars. The sudden direction changes and inertia were visibly causing the fuel to climb up the side of the tank which as the fuel goes down are probably starving the feed line.
It seems like there is a lot of hope for this project to actually come all the way through. Looking great so far and I can see it getting the last 25 percent improvement and then it probably will be the best rc car of its type on UA-cam. It starts, the throttle is responsive and its fast enough to warrant the effort.
The comment about the tank needing to be pressurized is correct. They flow a lot of fuel at WOT, and the diaphragm pumps in the carbs can't keep up with it unless you have some tank pressure. You might look into sintered bronze for your clutch basket. The hotter it gets, the better it works. You may need a bit stronger return spring though.. Other than that, pretty good run for the 'first' time out!!😄👍👍
Using the exhaust to pressurize the fuel tank is good. Putting partitions with small holes into the fuel tank might help with stalling when sideways. that way the fuel doesn't slosh around as much.
stalling- could be fuel pickup location on your tank you are using, also can play with the length of the hose from the exhaust to the tank to help keep constant pressure in the tank.
Rotors misaligned as you pointed out 1:10. They are 5mm holes in those rotors, get yourself 6 lightweight dowels of equal length and loctite into those holes.
So exciting to see that beast off the chain and thrashing about! Just like any scratch built DIY project, things are going to happen. I have 100% faith that you will work out the bugs. Looking forward to the next update!!
If you add a pressurized fuel rail system with like even 2 or 3 psi it would prevent it from shutting off when starved of fuel. I noticed its fuel delivery when it didnt fully die after turning and when you throttled it, it was already leaning out and it was to lean to get the fuel to create combustion again.
It would be interesting to see if teflon spray in the supercharger would help any. I understand that it wouldn't be a big improvement, but I'm curious as to how much, if at all, it would help. Might reduce friction and create a beter seal. Plus, it would be easy to try. Anyway, that is an incredible machine you have built, and the problem solving aspect of it must be extremely rewarding. Great job, man.
Fantastic model !!! Can’t wait to see it with the supercharger working and a flat out run for top speed. Not much into drifting and burning up the tires. Would love to have one of these, first one I’ve seen with the actual engine being used in a vehicle.👍🏻
The stalling issue could be due to being lean on the low end mixture. Try opening the low end needles 1/8 each, test and repeat. Also it doesn’t look like you have the exhaust linked up to your fuel tank? Most glow engines have a back pressure line to the tank or even a pump with regulator. This keeps positive pressure in the fuel system. These are the first things I’d check, could also be stalling due to change in wheel speed. Transmission wise, you can get 3 speed setup with metal gears. That would be cool and probably last lost than your current gearbox. Keep up the amazing work 😊
2:09 keep in mind that adding a supercharger for more power doesn’t mean the RPM will go up. The engine should rev to the same RPM but have more available torque across all RPM thus also improving horsepower levels. Unless you tune it or remove a governor it won’t show a higher wheel speed. I’ve been watching for a while and you seem like you know what you’re doing, but just something to keep in mind^
I think the problem with that blower might be that it’s not creating enough boost and has too many issues. You should try centrifugal instead. Lots of ones already out there that you can make fit and work fine.
I can only imagine how long it took you from concept, to making this video of it driving. R&D is an unimaginably arduous task of success & failure, until you get to the point of consistant successive runs of pure V8 stomping runs of smiling, until your face hurts. Some people think making these "toys" is a waste of an adult's time, energy & resources. What low brain wattage floofs don't understand is, this is the very type of activity which gives some of us a reason to wake up on the weekend mornings. Never stop researching, developing, assembling, testing, & succeeding!
I would have thought centrifugal force places the fuel in a position inside the tank that the engine starves itself. Split the fuel line to draw fuel from the lowest position in opposing corners of the tank. Also dividers inside the tank like a petrol tanker would ease the sloshing about. What an amazing thing. The comment below makes sense but I thought I’d contribute for the algo. Cheers MBL
I can tell a difference with/without the supercharger. With, the throttle is quicker. As you said in the other video it is crisper so it is working. A supercharger doesn't increase RPM, it increases power within the same RPM range. Checking rpm on the tire is only different based on how much throttle that you provide
Just my 2 cents, Im guessing your engine stall at low rpm due to engine load. Maybe alter your clutch or for temporary try to increase the engine idling and see if it makes any difference. Such a cool thing to build. Impressive!
The blower needs helix shaped impellers to avoid jamming up. This is doe to deflection of the straight cut rotors under load. The port shap on the SC discharge side needs to be triangle shaped for better airflow and efficiency. Those little holes will just choke the engine. If you look at a full size Eaton automotive SC like an M90, you can see what I'm suggesting.
Sorry if this is random but I was wondering about getting a mini lathe (more like micro) I saw some for sale on stirlingkit and was wondering if they are any good, or could be upgraded to be good. The website shows your channel name so I thought I’d ask you. Thanks
You could always try porting it as well as a low pressure fuel pump so it never starves. also larger jets if you wanna commit to the super charger, more air needs more fuel (you could've already done that but I'm a lil dumb)
the motor shutting off when skidding could be something like the oil going to one bank of cylinders instead of staying in the pan? but then itd start running way rougher so idk. maybe you can add one of your older centrifugal superchargers to it instead of the roots blower? with only the one turbine it shouldnt have any collision issues.
through some dowels through the rotors so they stay put. thread the ends so you can secure them. It might help the rotors not contact the housing since it won't be able to deform the aluminum at high rpm.
For the clutch how about making a flat flywheel and using mountain bike hydraulic disc brake pads as clutch pads using that pivot you already got to push 3 or 4 pads against a flywheel.
Sweet! So glad you're at the testing phase. I've been watching the build process and am REALLY IMPRESSED! I don't know if anyone has mentioned it yet or I may grant forgotten if you already thought about this, but have you implemented some runaway protection? You know, how to make the car stop if it loses contact with the radio while under full throttle. Always an issue with nitro RC cars.
I'm glad that you looked at that supercharger.... Very difficult on small-scale to get any form of pumping efficiency... Ratio of size 2 clearance.. Plus friction of the belt... but perhaps you could just run the supercharger with a motor and measure the pressure at different RPMs..... As well as getting an idea of the flow rate...before connecting it back to the engine...
So I know that by taking the super charger off vs having it on will never change ur RPM on the wheels. But it does increase power. For the engine. And I think to keep the rotors in line u should mill something out that goes into the rotors so they done become miss aligned again.
well for the fuel issue maybe you can attach a small camera that sit watching the fuel line see if it its sucking air in and losing the pressure as fuel sloshes. or make a small tank with baffles in to so the sloshing is not as bad. this has seriously been a dream of mine since i was a kid to see a V8 RC car heck even a inline 4 would be awesome, i just hope my states banning of small engines this year wont count for these because i really want to build one.
Johnny, you should mill out some 1 piece rotors for that blower and open up the ports so it actually flows air.
And if he gave them some twist they would probably be smoother.
There's a reason nobody does forced induction on RC engines. It doesn't work.
real screw/roots blowers have Teflon strips to help seal. i dont know if he could do that too.
@@1one3_Racing rc airplaned have been using superchargers for a long time lol
@@everettstormy is this an aeroplane?
It stalls sideways because the wheels have stopped turning ! It’s lost its forward momentum, at low rpm you have practically no torque available from the motor, it’s not a diesel engine & you have a huge flat spot in the power.
I'm sure this has a one way bearing preventing that issue
@@andruwmartinez4129it stalled In the beginning of the video when he engaged the clutch then had to give it gas to take off running
It’s a traditional manual transmission. When the clutch is engaged you can’t just stop. I know he put that Revo transmission in but that doesn’t change the direct drive nature of the setup.
No, the carbs are losing their prime because there's no tank pressure. The diaphragm pumps on the carbs depend on intake pulses to function, and at high rpm the pulses are too close together to provide sufficient volume. That's why you have run a line from the muffler to pressurize the tank. This is done on a lot of RC planes as well for the same reason.
For curiosity sake since I'm not a mechanic or engineer or mechanically incline... would a check valve "back flow preventor" work similar to plumbing applications?
You need to ensure the fuel tank remains pressurised by feeding exhaust pressure into it. this way, fuel is always forced into the engine.
Very nice way to blow things up.
@@GeomancerHT Thats how nitro engines work, do your research lol
@@GeomancerHT All RC nitro engines do this, pretty much.
@kynghype9715 Geomancer probably thinks EGR valves are a good thing too 😂😂
@@mattinwinkymg Lol... oddly enough I got into an argument with someone about that and PCV systems too!
The sound never gets old, and hearing it on a moving chassis outside is just fricken amazing
Yes & I'd crank up the volume on "Copperhead Road" by Steve Earle EVERY time I do routine maintenance on mine!
A heavier flywheel may help with the shutoff problem.
Why??
@@fra5724more inertia, but the problem there is it wouldn’t be as rev happy. It should still rev plenty though because it’s a
@@goosebox9064 ty
It would actually reduce the engine RPM; plus he's already burning out clutches on the flywheel he has, so this might not be a good idea. The comments above about pressurizing the fuel tank with the exhaust is probably an easier solution and won't require any additional modification. Seems to me like the system is losing fuel flow to the dual carb setup in a tilted position which is very indicative of low fuel pressure.
@@someonesomewhere_777 A heavier flywheel will not reduce engine RPM. It WILL slow engine response due to more inertia, which is why a lightened flywheel is a common performance modification. The downside to a light flywheel is a tendency for the engine to lose RPM quickly...sometimes so quickly that it dies. Which is what might be happening here. Slowing engine response will not hurt the clutch. If anything, it will increase clutch life due to more gradual changes in RPM. Johnny has a lathe and a mill - adding weight to the flywheel shouldn't be a big deal (if that in fact is the problem).
I have dreamed of seeing a V8 RC car since I was like six thank you for making this I couldn’t stop smiling
Same, he's very talented with everything he makes for these cars. The new engine he just showed, the orange one that made by a different company, seems like it would be way better in this.
@@frankierzucekjr same...
If you think it’s fuel sloshing make baffles in the tank to reduce the liquid movement. And also the low rpm if you throw the drift tire with a plastic sleeve you can draw your conclusion of fuel loss and or rpm being to low
Review how gas RC PLANES do it. They go inverted and still have power.
Full size car our fuel cell has foam in it to prevent sloshing may be easier than making baffles
That rc has 4 more cylinders than my Subaru 💀
The effort and determination of this guy is insane. Every time I see one of your video's in my for you page I don't even hesitate to click on them. I am proud to be one of your 1.87M subscribers!
I am a here as well....Count me in on this comment
I myself! I had raced Car, Motorcycle, and RC!
100% agreed. This man has the best channel on UA-cam.
One hell of a smart man
That is becoming some serious automotive design, i mean that colling and exhaust, you grow my man!
Colling?
My guess is rotor shaft flex and the tolerances of the supercharger synchro gears:
-That tri-lobe rotor looks to be a 3D ratio, with 3 segments I doubt it has the rigidity to stay straight under boost.
-The synchro gears would need to have insanely tight tolerances and sub tenth backlash to maintain the lobe seal with such small gears/rotors. Even operating with a wet seal design.
-If you do decide to make your own rotors, may I suggest a helical tri-lobe.
U could cut a two slots into the metal, to maintain balance of the clutch and into the friction material, and use two dowel pins plus a lil glue to keep it from delaminating!! Just a thought!! Keep it up, love the Vidz!!!!
I'm just impressed with how well it starts, I've seen lots of others struggle with these.
i think part of the reason it stalls when u slide is causee the engine just doesent have enough energy to keep going when the wheels slow down after a slide. real cars do the same if u spin and dont disengage the cluch
I’ve been watching since you got the V8 and I’m stoked to see it driving and skidding around bro, well done 🙏
Φίλε Έλληνας είσαι σε βλέπω τόσο καιρό και δεν με πήγε ο νους ότι είναι Έλληνας. Μπράβο ρε φίλε συγχαρητήρια, τέλεια βιντεάκια
Φίλε και εγώ έπαθα πλάκα τον βλαιπω πάνω από 2 χρόνια και δεν μου είχε περάσει ποτέ από το μυαλό 😮
Ναι ισχύει παιδιά ο τύπος είναι πολύ μυαλό!
I would love to see new rotors for the supercharger!! There's so many videos out there with little superchargers and turbochargers for micro engines like this and none of them ever work. it's so sad I want to see one that works. you can do it!!
make it loud
He should learn to drive it first!
@@mrtambourineman6107 no, make it loud first
Best v8 rc ive seen running an driving so far on UA-cam....❤
I will like to shrink myself so I could drive it. Dispite the repairs it needs I still find it perfect and awesome. Great work Johnny.
This thing is so dang cool! Thanks for sticking with it and continuing to share!
The scoring on the inside of the supercharger housing looked like it was towards the center, so the rods holding the rotors might be bowing from a slight imbalance when they spin fast enough. Someone mentioned one-piece rotors, so that might help a rigidity issue. If that's what's actually happening.
I think it stalls because it's loading the engine to much and bogs, either from being to lean or to rich, to test if it's slosh tilt it sideways?
Excellent stuff! I think you might benefit from a baffle or two (or foam) in your fuel tank.
At first I was worried JohnnyQ90 wasn't devulging that he is sponsored by Toyan or Sterling Kit, and that he actually gets all these engines for free. You're supposed to let people know if you're sponsored. To be honest, though, I think these videos have made me want these small engines less and less the more of them I see. Imagine spending $1700 on this "supercharged" V8, plus everything else needed to get it to run (and even more if in an RC chassis), and the thing just breaks almost immediately because of terrible manufacturing and tolerances. I'll stick with enjoying watching someone else spend tons of money on getting them to work right.
I don't mind he's sponsored or not. I love the creative process in his videos. I think he does a great job. I love watching all of the unique machining parts and 3D printed parts. Those engines seem on the surface really awesome but I can tell they break catastrophically really easy, the tolerances in the machining process are probably not good at all even though it "looks" good. Being sold extra attachments like superchargers that actually hinder and hurt the motor instead of actually giving more power. You would have to have a bunch of expendable income and enjoy this as a hobby because these motors seem like they're really low quality and horribly made and unreliable.
@@OhHeyItsBilly I don't mind if he's sponsored either, but you're supposed to disclose it.
bit rude i do say
You can literally buy a real roadworthy car with a real motor for that price. Most of mine have cost less
I know right here I’m Australia it’ll cost me about 2.5k for just the engine
I agree with a lot of these comments about the stalling issue. I’m leaning towards the idea that was mentioned about the clutch being still engaged while the car comes to a complete stop. That would definitely stall my car at least. That also probably played a roll in the clutch breaking. If it’s a fuel issue though, my suggestion is try a bigger fuel line, and a carb bowl if they don’t already have one. The bigger line will keep it from hydro locking, and the bowl will help with whatever air still gets through. As for the super charger I’m on team solid rotors lol. Those have to be one, solid, smooth piece to get rid of the slap. They have way too much wiggle being three pieces each.
In other news; line lock? Totally unnecessary and would probably destroy the transmission but man would it be cool if it worked. Just sitting there roasting the tires and then turning it off and peeling away.
As always, love the video. Keep up the awesome work, and I can’t wait for the next one.
I bet youre so happy to see it coming together. I know your viewers are. Way cooler than normal RC cars nitro or battery. Well done.
Just get the four- stroke sound is amazing. Phenomenal piece of engineering all around!!
Imagine showing up to a car meet and whipping out the V8 RC car. Coolest guy at the meet :'D
Real cars also can stall during a slide like that; if you let off the gas when it's fully sideways, the wheels aren't rolling forward, so the engine will stall. You need to put in the clutch when the car gets too sideways or else keep the throttle on so the wheels don't stop turning.
I've been waiting for this video for so long and I'm glad it's finally here. But also I can see it needs some refinements in the power band, especially in the low rpm, knowing your potential it would be amazing to see you make turbos like you did for the twin cylinder 4-stroke, but have two different sized turbos and connect them in a compound setup so that way you can get the most torque down low and horsepower up high.
Pulling air bubbles into the fuel line. Add a splitter with 2 inlets inside the tank.
Or a piece of fuel filter foam to stop the sloshing.
A felt or ceramic fuel clunk may help if fuel is aerating or sloshing air causing it to die.
Dry sump tanks in race cars are tall to prevent the oil pick up in the bottom from being uncovered. You need to do the same with your fuel tank; taller talk will prevent the pick up from pulling air. Great work!!!
Johnny, on nitro engines, we have to apply pressure to the fuel tank via a line from the exhaust. The impulses form the exhaust muffler pressurize the fuel tank.This will keep fuel flowing to the carbs and prevent leaning out due to fuel slosh.
Sounds just like a V-8, only smaller ..
Nice Talent you have sir .. Please continue to share that talent with the world ..
Wonderful progress Johnny sounds like a nascar
Right on!!!
very exciting V8 sound! great work!
It would be interesting to spin the supercharger at operating RPM without the engine, to see how much air it moves. I think these tiny engines are too small for forced induction to work properly. And I think the tolerances are probably just good enough for them to run, I think any substantial level of boost would bend things or just end up being lost as blow by. I'd love to be proven wrong, though. "2 Stroke Stuffing" gets an astounding amount of power out of a 50cc engine, but that's only one cylinder, and it's actually designed for vehicular use.
glad to see it finally roam free on the ground! all that work!
I think a 7.5cc nitro engine 1 cilinder wil outperform all those toyan engines. Sad but treu. I still love it that you try making them work!!😍
It has a terrible understeer, the car doesn't want to turn. And if you apply too much power, it immediately oversteers.
I suggest you check your differential (if exists) . This issue causes extra load to your engine and clutch while turning.
The car came from a long way, and I love how you build it with great effort and create quality content.
Keep on, friend across the pond!
its been more than 2 years followed you and i'v seen this little thing grew and now its 90% finished i am so proud of you. gg and continue let's go to the 2mill
can you please explain why you measured the rpms when determining if the supercharger actually did something? shouldn't they stay the same due to the gearing? i'm genuinely curious, i'm new to the world of rc cars
Obviously adding any kind of boost, will not increase the rpm of an engine. What I did, was to show how easily the engine performed N/A (1,100rpm), but with the supercharger it reached slighly lower rpm, which to me, is an indication that it didn't actually do anything, as it should have the same rpm as in N/A form. Even if the supercharger was adding any power, it wouldn't be for too long, as it started self destructing.
@@johnnyq90 ooohhh ok, that makes sense. Love the project btw, keep improving the car 💜
So freakin cool bud. That definitely has some power. It sure is nice to have that starter on the remote. I used to have to run up and pull start mine lol. But it was also a 1 cylinder tiger 21 motor. I think thats what it was called. This is just too cool bud. Well done.
@JohnnyQ90 - just a thought: set up the throttle and clutch actuations on the same servo (or multiple servos from the same channel) - as you give it more throttle, the clutch starts to engage, and as you let off, the clutch disengages. This would take an incredible amount of fine tuning, but I’d imagine would work extremely well, but still provide that realistic functionality you’re looking for.
I bet that felt great getting it out for a spin congrats bud awsome work
Thank you good sir for making our dreams come true! 🙏🙏🙏 A V8 RC... 😍 What a great set if skills you have!
wow, amazing how much it drives and sounds like a real car!
Very impressive setup. It's hard to believe a V8 could be so small and well deigned. It looked so cool drifting and spinning tires. 👍🏁🏆
creating a body for the car once it is mechanically sound would be so cool! , it would literally be a mini car! , great vid once again!
This guy is smart and clever to figure it out, he knows his car well. Dude built it from scratch
This dude and these builds inspire me to go learn how to do stuff. So freaking cool. Thanks for documenting this for us, Johnny!
Also, it shuts off becasue you need a baffle in the tank(possibly even the carburetor bowls). The G forces involved in that turn are preventing fuel from feeding the carb.
Круто получилось, осталось только корпус подобрать и будет пушка 👍
Круто я не один русский смотрю этот канал
I think the stalling is many things at the same time.
- low torque at low rpm. You either need to have the clutch slip or do a burnout to maintain enough engine rpm. Your lose all speed forward which forces the wheels to stop. You don't have enough gears in the gearbox to help keep the engine rpm.
- add some baffles in the tank
- consider some exhaust to add fuel pressure.
Great video. But maybe not so great for the supplier of the compressor. It did have issues even before you installed it, being silent in only one direction. They need to step up their manufacturing quality and testing.
Agreed. I still think a centrifugal clutch like a typical nitro car would be the best option.
@@N301RCSTREETOUTLAWS Yes, having automatic clutch slip at low rpm makes life easier.
I'd add a baffled fuel cell to the list too, maybe put some foam in there and or make something custom with a baffled swirl pot built into it, the sort of thing you see on drag cars. The sudden direction changes and inertia were visibly causing the fuel to climb up the side of the tank which as the fuel goes down are probably starving the feed line.
It's amazing that you got this to work as well as it did. Well done.
It seems like there is a lot of hope for this project to actually come all the way through. Looking great so far and I can see it getting the last 25 percent improvement and then it probably will be the best rc car of its type on UA-cam. It starts, the throttle is responsive and its fast enough to warrant the effort.
That sounds awesome dude holy fuck. This is like the next level in realism. Hearing it pass you even at those low speeds is insane
How loud is it? Is it painfully loud like a typical nitro engine?
You could fill the gas tank with race foam it prevents the fuel from sloshing around
The comment about the tank needing to be pressurized is correct. They flow a lot of fuel at WOT, and the diaphragm pumps in the carbs can't keep up with it unless you have some tank pressure. You might look into sintered bronze for your clutch basket. The hotter it gets, the better it works. You may need a bit stronger return spring though.. Other than that, pretty good run for the 'first' time out!!😄👍👍
Using the exhaust to pressurize the fuel tank is good. Putting partitions with small holes into the fuel tank might help with stalling when sideways. that way the fuel doesn't slosh around as much.
stalling- could be fuel pickup location on your tank you are using, also can play with the length of the hose from the exhaust to the tank to help keep constant pressure in the tank.
Rotors misaligned as you pointed out 1:10. They are 5mm holes in those rotors, get yourself 6 lightweight dowels of equal length and loctite into those holes.
So exciting to see that beast off the chain and thrashing about! Just like any scratch built DIY project, things are going to happen. I have 100% faith that you will work out the bugs.
Looking forward to the next update!!
Increible, el récord, qué dejaste en Londres.
esperó que tarden mucho en superarlo!!!!
FELICIDADES!
If you add a pressurized fuel rail system with like even 2 or 3 psi it would prevent it from shutting off when starved of fuel. I noticed its fuel delivery when it didnt fully die after turning and when you throttled it, it was already leaning out and it was to lean to get the fuel to create combustion again.
It would be interesting to see if teflon spray in the supercharger would help any. I understand that it wouldn't be a big improvement, but I'm curious as to how much, if at all, it would help. Might reduce friction and create a beter seal. Plus, it would be easy to try. Anyway, that is an incredible machine you have built, and the problem solving aspect of it must be extremely rewarding. Great job, man.
the compressor is making more power, not more rpm. redline wont change with a compressor.
Very Cool!!! Such a unique sound for an rc!
Fantastic model !!! Can’t wait to see it with the supercharger working and a flat out run for top speed. Not much into drifting and burning up the tires. Would love to have one of these, first one I’ve seen with the actual engine being used in a vehicle.👍🏻
The stalling issue could be due to being lean on the low end mixture. Try opening the low end needles 1/8 each, test and repeat.
Also it doesn’t look like you have the exhaust linked up to your fuel tank? Most glow engines have a back pressure line to the tank or even a pump with regulator. This keeps positive pressure in the fuel system. These are the first things I’d check, could also be stalling due to change in wheel speed.
Transmission wise, you can get 3 speed setup with metal gears. That would be cool and probably last lost than your current gearbox.
Keep up the amazing work 😊
That clicking sound made EVERY car guy wince. Anytime something mechanical makes that noise it's normally not a good thing.
2:09 keep in mind that adding a supercharger for more power doesn’t mean the RPM will go up. The engine should rev to the same RPM but have more available torque across all RPM thus also improving horsepower levels. Unless you tune it or remove a governor it won’t show a higher wheel speed. I’ve been watching for a while and you seem like you know what you’re doing, but just something to keep in mind^
this is one of the coolest things ive ever seen
I think the problem with that blower might be that it’s not creating enough boost and has too many issues. You should try centrifugal instead. Lots of ones already out there that you can make fit and work fine.
I can only imagine how long it took you from concept, to making this video of it driving. R&D is an unimaginably arduous task of success & failure, until you get to the point of consistant successive runs of pure V8 stomping runs of smiling, until your face hurts.
Some people think making these "toys" is a waste of an adult's time, energy & resources. What low brain wattage floofs don't understand is, this is the very type of activity which gives some of us a reason to wake up on the weekend mornings.
Never stop researching, developing, assembling, testing, & succeeding!
I watched your build fantastic job BEAUTIFUL RC❤
thing sounds SOOO good man! Id go to a positive pressure fuel system like nitro cars run normally where it gets some exhaust air to pressurize it
I would have thought centrifugal force places the fuel in a position inside the tank that the engine starves itself. Split the fuel line to draw fuel from the lowest position in opposing corners of the tank. Also dividers inside the tank like a petrol tanker would ease the sloshing about. What an amazing thing. The comment below makes sense but I thought I’d contribute for the algo. Cheers MBL
I can tell a difference with/without the supercharger. With, the throttle is quicker. As you said in the other video it is crisper so it is working. A supercharger doesn't increase RPM, it increases power within the same RPM range. Checking rpm on the tire is only different based on how much throttle that you provide
Just my 2 cents, Im guessing your engine stall at low rpm due to engine load. Maybe alter your clutch or for temporary try to increase the engine idling and see if it makes any difference. Such a cool thing to build. Impressive!
The blower needs helix shaped impellers to avoid jamming up. This is doe to deflection of the straight cut rotors under load.
The port shap on the SC discharge side needs to be triangle shaped for better airflow and efficiency. Those little holes will just choke the engine. If you look at a full size Eaton automotive SC like an M90, you can see what I'm suggesting.
Sorry if this is random but I was wondering about getting a mini lathe (more like micro) I saw some for sale on stirlingkit and was wondering if they are any good, or could be upgraded to be good. The website shows your channel name so I thought I’d ask you. Thanks
You could always try porting it as well as a low pressure fuel pump so it never starves. also larger jets if you wanna commit to the super charger, more air needs more fuel (you could've already done that but I'm a lil dumb)
the motor shutting off when skidding could be something like the oil going to one bank of cylinders instead of staying in the pan? but then itd start running way rougher so idk.
maybe you can add one of your older centrifugal superchargers to it instead of the roots blower? with only the one turbine it shouldnt have any collision issues.
Δεν περίμενα ότι θα έβλεπα τέτοιο διαμαντάκι στην πόλη μου! Πολλά συγχαρητήρια!
what's your city?
through some dowels through the rotors so they stay put. thread the ends so you can secure them. It might help the rotors not contact the housing since it won't be able to deform the aluminum at high rpm.
For the clutch how about making a flat flywheel and using mountain bike hydraulic disc brake pads as clutch pads using that pivot you already got to push 3 or 4 pads against a flywheel.
One thing I'd say, is the forced induction from the supercharger should improve the torque throughout the rev-range, but not the top-end of it.
Sweet! So glad you're at the testing phase. I've been watching the build process and am REALLY IMPRESSED!
I don't know if anyone has mentioned it yet or I may grant forgotten if you already thought about this, but have you implemented some runaway protection? You know, how to make the car stop if it loses contact with the radio while under full throttle. Always an issue with nitro RC cars.
Maybe it’s a fuel delivery issue or the rotors binding either way I still think it’s dope having it on there.
Need a locking slot or slots for the clutch lining or something. Really neat project!
I'm glad that you looked at that supercharger.... Very difficult on small-scale to get any form of pumping efficiency... Ratio of size 2 clearance.. Plus friction of the belt... but perhaps you could just run the supercharger with a motor and measure the pressure at different RPMs..... As well as getting an idea of the flow rate...before connecting it back to the engine...
So I know that by taking the super charger off vs having it on will never change ur RPM on the wheels. But it does increase power. For the engine. And I think to keep the rotors in line u should mill something out that goes into the rotors so they done become miss aligned again.
This thing's gonna burn some rubber 🔥🔥🔥
You could make a custom fuel tank with baffles on the inside to prevent the fuel from sloshing to either side. Cheers!
With NASCAR bodywork that would be a sick RC car
well for the fuel issue maybe you can attach a small camera that sit watching the fuel line see if it its sucking air in and losing the pressure as fuel sloshes. or make a small tank with baffles in to so the sloshing is not as bad. this has seriously been a dream of mine since i was a kid to see a V8 RC car heck even a inline 4 would be awesome, i just hope my states banning of small engines this year wont count for these because i really want to build one.