What if you install FIVE flywheels onto an engine?

hey there fellas all right so we got a lot of requests to take a car with a fully operational motor of course remove the gearbox take a bunch of flywheels and proceed to start adding them on one at a time attach a large amount of flywheels to a motor and see how it operates anyway so i've got myself these here flywheels these are resurfaced which is to say that we didn't make them any lighter here's our car which is packing a motor so we remove the box cut out the transmission tunnel so that we can get a better view without having to lift the car then we try this out and see what changes occur let's do this [Music] what if you were to install 5 flywheels onto an engine translation and voice over by bmi russian we are looking very good we've bolted on a second flywheel we just needed to use some longer bolts they were way longer than we needed so we had to put a few washers in there too these do need to be bolted down tight we've got them perfectly centered right here you've got the pins that center the clutch pressure plate these are high quality so everything worked out very nicely they're perfectly on center okay so we've got two of them on there why don't we bring her down fire up the engine and give it some gas see whether the engine is smoother to operate or perhaps it'll be tougher to start we don't know yet bring her down start the car let's give it some throttle at a quick first glance nothing seems to have really changed the difference is actually quite tangible i'm sure you can hear it it's very slow to build them revs very lazy and it takes a longer time for the revs to come down than if it were to have just the one flywheel though we assumed that after installing a second flywheel without fitting a clutch disk and pressure plate or anything else for that matter we thought that nothing would really change but the change is pretty evident with that added weight the engine is having a tougher time revving it requires way more energy to get the revs up there is more power going to that than usual fuel and everything else also the engine speed drops much slower than it used to and that drop seems to be smoother i think it's time for us to add another one and see what happens after that [Music] check this out fellas we are looking very good indeed we successfully got that third flywheel on there we centered it using those pins just like we did the first time plus we removed the washers from underneath those long bolts the bolts are too long no more that third flywheel effectively offsets the lack of washers naturally we've gained a bit of weight three flywheels i'm guessing the crankshaft will still be able to handle them all right it's time we start the engine and see what's up how it operates how it even starts in the first place all right let's do this we're about to see it all for ourselves let her rip man so after letting the engine warm up slightly it's running nicely that's full throttle right there the revs are barely climbing it's taking quite a while [Music] and all because of the extra weight and they're pretty slow to drop too [Music] now in terms of operation this no longer reminds me of a lot of motor i mean to say that now it's very different in how the engine speed goes up and down like it's a completely different animal what's interesting is that i can hear some kind of weird noise it doesn't even seem to be a knocking sound more like it's rubbing perhaps it's because the crank is bearing so much load on one side and that messes with the clearances or maybe i'm hearing things see how long it takes everything happens very slowly let's throw the fourth one into the mix and see what that does we doing this [Music] fellas check out this sandwich that we made using four flywheels we're currently at four and it looks pretty how do i even say this honestly that looks pretty dodgy i mean seriously more flywheels that's just so much weight seven kilos yum seven times four is 28 kilograms oh my god 28 kilograms then you've got those six bolts 28 and a half kilos let's just leave it at that we've got the four flywheels on there time for us to do some testing okay so that's four flywheels 20 kilos can the starter even spin them that was a joke well it started and it's running at idle let's see where them revs are at nothing seems to have changed the engine is still vibrating like it always used to it's not that bad of course now what if i [Music] this is taking forever this is full throttle look [Music] what yes that's just what you get with a really heavy flywheel it just takes the longest time for the revs to climb though it's even more pronounced on the way down so you get it up to max rpm release throttle and it [Music] so when the revs almost reach idle there seems to be some kind of weirdness going on with the timing chain my guess is that the tensioner has fallen apart so the point of this experiment was to see how much of a change there'd be and indeed we're seeing some pretty dramatic changes in engine operation even when you add just one extra flywheel you can already tell that there's a big difference [Music] it's as if someone's inside the car and slowly letting off the gas pedal okay so that's four flywheels let's install number five so we found a bit of hardware for these flywheels all of which seems to be what we need meanwhile the main problem is this stuff these bolts with their 1.25 millimeter thread pitch they're not meant to be made from soft metal so it's a 10 by 1.25 out of soft metal as i'm sure you can imagine a bolt like this can easily stretch out bend break lots of bad things can happen to it what a bummer man well there's really nothing we can do so ultimately this is what we decided to do before we were observing to see what changes occur in engine operation how slow it would be to build revs or come back down and it turned out to be really slow anyway how about we fit a clutch to those four flywheels attach gearbox and drive around that'll give us an even better understanding of how things change i'm expecting this to be pretty good fun let's do this [Music] okay so here's the situation the gearbox is in place it wasn't even terribly hard to mount so when you're moving the gearbox away you're going to have to slap on a few spacers right which is exactly what we have done i mean we could have chopped the bell housing off of one gearbox and welded it onto another one but what's the point it's not that big of a change and so instead we fitted a few spacers that we made out of some metal tubes now if we look at the clutch i mean the hydraulic line that's routed to it we did have to chop the bracket given that the line is pretty short so yeah we moved that back it all works that's what matters this spacer right here it was already there before we chopped it in order to mount the starter motor here the spacers are a bit smaller we've got some aluminum in those spots or attaching the starter motor so all of this fits together like a dream right so we moved the gearbox back meaning that we had to shorten the prop shaft we actually have our very own machine which makes quick work of that sort of job and you even get a quality result we did all the necessary cutting and welding everything is where it needs to be i guess we're ready to head out and do some testing see how the car behaves on the move okay so i'm inside everything is good time to start the engine nice turn on the heater just in case we are going outside after all right let's roll no oh it does set off i'm also gonna drive that way [Applause] oh i really feel it now we are obviously experiencing some wheel spin but if i were to press the gas a bit harder the engine really hesitates to rev it gets there but it's not what you're accustomed to it's not nearly as snappy as it's supposed to be this is a very different thing then again i mean no surprises okay we got some wheelspin so one tire is not going to propel this thing we're not running a welded diff in this car come on move the steering wheel is at full lock [Applause] [Music] [Applause] we're just used to running welded dips and plowing through absolutely anything thanks to those come on now it's not necessarily a bad thing that we've got wheelspin it's actually quite convenient to rock the car back and forth on this setup no need for a ton of throttle input since even at low rpm those flywheels are giving you plenty of useful inertia so in that sense they're actually pretty helpful i'm not sure if you guys noticed or not but there wasn't a single moment when i felt that the car was on the verge of [Applause] stalling okay so when you let off the gas everything becomes clear as day it feels like we've lost compression in the cylinders you completely let off the gas and the car just keeps on rolling forcing you to break even this is quite unusual typically when you ease off the throttle you immediately get an engine braking effect not here though it just keeps on going like completely unfazed [Applause] and when you give it the full beans it takes a while for it to pick up boy now that was steam okay so the exhaust is touching the snow that creates steam which then makes it into the cabin so nothing to worry about them looks like someone's stuck no i'm curious to try something out okay so if you can it well isn't that a lovely effect it is having quite a hard time in third gear though i'm off the throttle third gear and we are just rolling it is decelerating slightly but not like it should you can tell that the engine breaking is much less effective the car no longer really has that ability setting off is quite pleasant though everybody who's taking driving lessons in a manual car absolutely needs to have an engine with this amount of flywheels so we're running 28 kilos worth of flywheels and an entire clutch assembly that's 30 plus kilos right there seems like the clutch isn't keeping up here's what's happening i bring the revs up really high i have the engine at high speed i change from second to third gear release the clutch see the revs haven't dropped yet they're still pretty high so when i release the clutch the pressure plate and the gearbox are trying to reel that motor in [Applause] you can feel the clutch slipping in that moment there's just too much weight oh my [Applause] it just keeps going and going and going we'd have already stopped on a regular flywheel let's discuss the results of today's experiment we fitted a few flywheels to this motor and it takes a considerable amount of energy to get that sandwich spinning given it weighs 30 kilos so it does get there slowly but surely now when you shut off the butterfly valve the revs are supposed to pretty much immediately drop to idle here though that's simply not the case it takes a long time for them to drop when you're running this kind of setup since weight translates to inertia that sandwich is going to continue to spin for quite a long time if you hear that [Applause] this just takes forever first of all setting off in this car is very simple again with that kind of weight you just ease off you don't get that effect when the engine is jerking around and almost installing you know what it's like when a beginner doesn't give it enough gas on a normal flywheel if you let off the clutch early you stall but here you don't get any of that because of all that weight that's what's propelling the car forward and since it is the winter you do get some wheel spin that said you do get moving the car just doesn't even care that's a nice bonus so the purpose of a lightweight flywheel is to make the engine snappier even if you remove so much as 200 grams you're still gonna feel like you're driving a race car all of a sudden the problem being that you're constantly riding the gas pedals you just give the gas one hit and off you go and there's no need to blip the throttle when shifting gears either that's something i quite like when you can shift gears and not have to think about whether you give it some gas or let off when you can just ease off or release the clutch and the car keeps moving without any sort of jerkiness shuttering and so on when it just keeps on going well at least when you're in second gear and higher and that does it for this one oh yeah and one more thing i'd like to share with you now i was actually expecting the crankshaft to snap what with one end of it having to bear so much weight it is made of iron after all and as far as the balance is concerned there didn't seem to be any sort of horrible imbalances so that's pretty nice okay i'd say we're looking at a 107 success rate here everything works beautifully nothing fell apart and that's all i have for you watch us subscribe send in those comments and suggestions give us a big thumbs up alright catch you later

Channel: Garage 54

Views: 965,293

Keywords: garage, garage54, flywheel balancing, flywheel balance, flywheel car, flywheel engine, flywheel experiment, flywheel heavy vs light, heavy flywheel, heavier flywheel benefits

Id: 0M92bfoJZMo

Length: 18min 46sec (1126 seconds)

Published: Sat Mar 13 2021