Ok, I think we all agree that if we take a 2.0L 4g63 and stroke it to 2.3L it will spool the turbo faster and create higher peak torque, but peak HP will be the same for both stock 2.0L and 2.3L.

https://www.evolutionm.net/forums/sh...hlight=2.0+2.3

If you see the chart in this thread, you can see 2.3L merely shifted the powerband to the left compared to 2.0L.

I'm talking about when EVERYTHING is equal, such as mods, tune, boost pressure, revving to stock 7600rpm, why does 2.3L make NO MORE hp than 2.0L?

I would like vendors or anyone who is familiar with this to come in here and explain please.

Thanks.

 

I think strokers dont work to good in evos because of such a long stroke 100mm Stroke to bore relationship is far from square,
in practice I had a 2.0 reving to 9000, strokers I think only do like 8000. So turbos like more the 2.0 because they can give more rpm and generate more boost,
maybe a real expert can answer this.

 

First of all, the 2.3L in that thread has WAY MORE power through the RPM range than the 2.0L. It's not even close. Peak horsepower and torque are exactly that, PEAK.

They both make the same horsepower because their torque is the same (look between 6500 and 7500 RPM). Since horsepower is a calculation based on torque, they make the same horsepower. This may sound like a quote from Captain Obvious, but it's true. Here is how horsepower is calculated:

Horsepower = (torque x RPM) / 5252

Either engine will have to produce more torque at the higher RPM range to produce more HP.

 

wut??????

generate more boost????????

 

Yea this dude is off base, a 2.3 is moving more air, and therefore more gas, therefore more exhaust.

It takes less RPMS for a stroker to generate more boost out of the same turbo all else being equal.

Scorke

 

But why is this happening?

Why doesn't stroker make higher torque than 2.0L all the way to the redline?

 

On that setup your probably using all of the turbo and or efficiency and regardless of a 2.0 or 2.3 the turbo cannot flow enough cold air to satisfy the engine to make power up top.

Scorke

 

So if you use big enough turbo, even though it wouldn't be feasible in real life,

2.3L should make more peak power compared to stock 2.0L? given that they rev the same.

 

Yes.

It SHOULD, but it usually doesnt. Depending on what your rev limit is on the stock 2.0 vs the 2.3 it could vary.

Scorke

 

I see. But shouldn't 2.3L's VE be higher than 2.0L at any rpm?

What about this,

Instead of stroking the motor, if you increase the bore to 2.3L would the result still be the same?

I want to know the science behind this.

 

The 2.3 runs out of rpm, to where the piston speeds start getting the best of it and it cant physically make anymore power past a certain rpm. It would be like spinning a 2.0l past 11k, its not safe and at this point your out of the engines efficiency. Thats why if you notice at around 7500-8000rpm on a dyno graph the stroker starts to nose over.

 

So, is it safe to say in general, stroker of any kind does not yield anymore peak hp than its oem motor? given that they rev the same.

 

https://www.evolutionm.net/forums/sh...hlight=2.0+2.3

that thread indicates exactly what I have seen several times on several different size turbos. 20g, 25g, 35r, 67mm. The 2.3 is a larger motor and simply makes more power. I get tired of the old 2.0 2.3 debate. when will these threads end?

 

Tell me why peak hp is same then.

If you can't provide scientific explanation of what's happening up there in the upper rpm range as far as VE or whatever goes, then stop posting please.

You don't have to repeat what we already know.

 

I define power as power under the curve for a 2500rpm band. This is what is needed to a have a car that is easy to drive fast. I dont understand how someone can look at that graph and say the 2.0 makes same power as 2.3. the average hp between 5000-and 7500 is 487hp for the 2.3, and 446hp for the 2.0. even if you extent the hp comparo to 8500. the average under the curve for the 2.3 is still the winner. Ad to the fact that a stroker needs cams with larger duration and dont suffer rough idle like a 2.0 would. Proper bigger cams for the 2.3 would make the comparo even more brutal. and this is when the peak HP for the 2.3 will become the winner for those who only care about bragging rights of peak numbers.