Why can't I4bangers really go above 2.5l? Wasn't there

>>16929045
There was a 4 cyl bus engine with like 8 liters of displacement.

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>Why can't I4bangers really go above 2.5l?
They can.
>Wasn't there some GM I4 that was like 3 or 3.5l?
IDK but here you have an I3 2.3l.

Balance becomes and issue. Adding more cylinders solves this.

>>16929048
Good lord, can it fit in my Honda?

Most countries base their tax and insurance systems on engine displacement making certain sizes more cost-effective.

That's all there is to it.

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>>16929052
>I3

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>>16929055
No but you can put this 20 something liter in

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>>16929045
Balancing four cylinder engines larger than 2.5l gets very difficult to balance. The only way to overcome this is by having fuckhuge leves of displacement or not worrying about reving over 5k.

some shitty porches have 3.0l inline 4s

>>16929068
i literally thought the thumbnail was some guy in a kitchen with a crockpot

>>16929045
what about V4s, OP?

>>16929074
That would be the 968 whose engine was literally the 928S engine cut in half

>>16929068
you can tell that sucker's old from the split cylinder/crankcase

>>16929076
>what about V4s, OP?
My motorcylce is a 1.1l V4. This particular one has an odd firing order where both cylinders on one bank reach TDC at the same time.

It's an earthquake at mid RPM, also in overdrive it's practically bouncing along the road.

I too remember hearing about an old GM produced I4 that was horribly inbalanced. Can't remember what tho.

>>16929045
my 'yota has a 2.7L 4cyl. Didn't porsche build a 3.0L 4cyl for the 944 or some shit?

>>16929045
Are you referring to the super 4 based off the iron duke?

>>16929105
See
>>16929080

>>16929109
The Pontiac engine?

>>16929116
Yeah, it was in some special versions of the Fiero and was used in racing

>>16929121
That may be what i was thinking of then.
Part of me wants to try driving one.

Most i4s above 2.5L end up vibrating and sounding like shit

>>16929130
They're rare as fuck but apparently an outfit in Kansas has some of the engines and parts to build one

https://en.m.wikipedia.org/wiki/Fiat_S76_Record

>>16929105

Same here.

The 2TR-FE Toyota 4 banger that they put in the Tacoma (and some others I think) is 2.7L

It also has balance shafts though. In addition to the crank there are 2 gear driven counterweight shafts to smooth things out.

>>16929139
>ywn have a 46l V12 bmw with rocker arms the size of your fist

>>16929045
Didn't the porsche 94/968 have a 3.0 4 banger?

All you had to do was Google 4 cylinder and see that they can go much larger.

>>16929076
>V4s
Only if they're 90 degree V4s

Even a balanced 60 degree will blow itself to shreds in a low number of hours

>>16929045

There are tons of 3.0L 4 cylinders out there, mostly older diesels (I think practically every nip manufacture has one) and there's the 2.7L 2TR-FE.

>>16929045
the scion tc has a 3.2l I4

>>16929152

The 2TR-FE is the most common Toyota gasoline engine used in their body on frame vehicles

Hilux, hiace, Prado, fortune, light dyna, etc.

Normally the poverty trims

>>16929285
No it doesn't you absolute fucking retard

t. tC owner

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This (and the 944 S2) had a 3.0l inline 4.

i have a 2.8 i4

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>15B-FTE

4,104 cc

>>16929045
Detroit 4-53T
>I4
>2 stroke diesel
>3,4L/212 C.U
https://www.youtube.com/watch?app=desktop&persist_app=1&noapp=1&v=x5Fx2FDjtqU

>>16929285
Holy shit no lol it has the same 2.4l as a Camry, didn't you lease one of these things or something? How are you so retarded

>>16929363
How are you supposed to jake a 2 stroke?

>>16929387
I think Detroits use compression release brakes but I've also heard that Jacobs has exhaust brakes specifically for Detroits

>>16929429
Neat, i know SAE has a paper about the function of engine breaking and compression release braking on 2 stroke diesels but it costs $27 to read so fuck dat

>>16929045
Because the holy grail of compustion chambers is 500cc.

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>>16929474
>implying

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>>16929485
>

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>>16929513
no

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>>16929513
>>

>>16929518
>pontiac
luh mayo

>>16929521
>has one more cubic inch
but none of the cred

>Why can't I4bangers really go above 2.5l?
the relation of the position of the pistons in relation to one another changes, so the center of gravity of all 4 changes. This causes vibration. The bigger the pistons and faster they move the more vibration you have.
There are some very big 4 cylinders, but they rev very slowly.

>>16929074
Kek 968 is a great car
>>16929080
The 968 engine was an updated design based off the 944, not the 928.
>>16929105
>>16929114
The 3.0 I4 was used in the 968 and was designed as an update to the 944, which itself was a successor to the 924.

>>16929530
>but none of the cred

Kek LS is more legendary than Hemi could ever be

>>16929549
3.0 was in some 944s

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>>16929557

>>16929363
sounds like a dirt bike
>frei: on this episode of roadkill we put THIS tiny little 2 stroke in THIS 1950s pickup!
>fin: what can go wrong?
>frei: what can go right?
>both laugh, cut to intro PRESENTED BY DUUUUUUUURGE

>>16929080
There was no stock 6 liter 928 engine.

>>16929581
That engine never crossed 3k rpm desu.

>>16929562
This is true but if I remember correctly the 3.0 in the 968 was not the same as the 3.0 in the 944.

where are the memes?

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>>16929615
Gotcha boi

>>16929605
because its 2 stroke it sounds twice as fast as it actually is rotating

>>16929565
Hemi fags btfo

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>>16929653
Wrong. Everyone will remember your engine as the trash people would swap because it's the only thing that fit.

>>16929666
>426ci
What's that for, a bicycle?

>>16929713
Superior Chrysler engineering knows how to make more power without burning more gas.

>>16929098
The one that was literally a v8 cut down the middle

The Pontiac Trophy 4 was more or less half a Pontiac 389 V8, giving it 3.2L displacement and making it the largest displacement petrol I4 in a post-war production car. However with increasing displacement, especially in engines with inherent imbalances, the balancing becomes and exponentially worse issue.

The Trophy 4 was a budget solution through and through and there was no money for adding balancing shafts, so they tried to counter the ridiculous shake with absolutely marshmallow soft engine mounts and a slightly soft, bent driveshaft contained in a tube meant to absorb vibrations. Even so the Tempest was noted by reviewers for its exceptional shakiness, and you could infact see the engine sway about by several inches in the engine bay.

Even when balancing shafts are utilized their weight soon becomes so high that they start making the engine uneconomical.

>>16929815
want

>>16929808
That would be a v3.5 though

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>>16929849
Mickey Thompson force fed one and presumably used it in lightweight class drag racing for a while.

>>16929863
W-what? That would be a v7 cut in half.

>>16929880
Imagine winning races then cracking the hood to reveal a 4 banger. Honestly that's just salt in the wounds at this point.

>>16929740
Kek the only good thing FCA ever made was the viper but it's engine is wildly inefficient for its size.

Hemi fags stay btfo

>>16929666
>Your engine is bad because it makes top tier power for minimal price and size

Yep, sure sounds like trash to me.

Stay btfo faggot

>>16929262
Why is that? I've heard this a few times and I am honestly wondering.

>>16931958
Funny you should say that because FCA didn't exist when the 426 was being produced

>muh modern hemi
Isn't a Hemi.

>it's engine is wildly inefficient for its size.

It's a wedgehead after all.

>>16931971
I'm saying it's the only thing you can pull out of a junkyard that makes more power than your 300k mile 4 cylinder.

lel, a junkyard motor.

>>16932466
Kek you must be poor.

I've done engine swaps and people don't just use the LS and derivative because they are inexpensive they also use them because they're great engines. They dominate the power market in terms of price, size, and reliability.

There's literally no argument

>FCA Hemi cuck faggots staying btfo

>>16929064
The rocket is the shit nigger.

https://www.youtube.com/watch?v=rla9KU0m808

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>>16932501
>they're great engines
The only thing they dominate is mild performance. The only thing worse than an LS is a mod motor.

>GM fangirls think polishing a turd makes chocolate

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>>16929045

My work truck has a 3l diesel 4 banger.

4 cylinder plane engines are pretty big (6l+). If you put one in a car would it drive like a diesel?

>>16932561
I can tell you it'd overheat in minutes without a propeller.

>>16932563

But isn't an air cooled 911 engine basically just a small plane engine?

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>>16932574
Not really, there's a lot that goes into keeping an aircooled car engine from overheating but you could prolly put a Porsche engine into a plane if you wanted.

You need a combination of shrouds and fans to constantly keep air moving. Plane engines were designed around having a gigantor fan in front of them and flying around in ice cold but thin air.
You could probably make it sustainable after many hours of labor.

Even watercooled plane engines have historically had trouble staying cool in cars for some reason.

>>16929052
w8
isn't this a VR6?

>>16932551
Kek sorry anon but there's no better way to high end hp

>>16933667
Besides the Hemis dominating high end HP motosports like top fuel.

Toyota has 3 liter 4cyl diesel engines