With 2.4L of displacement a AMS GT35R turbo kit can reach 20psi by 3600rpm. That's only 100rpm later than stock.

https://www.evolutionm.net/forums/sh...no#post3950702

 

the thing is if you get 470 on 91 with an evogreen you're not gonna see much at 7k.

if you get a 3076 you'll see more... how much, iunno but it would give you the most balance that you're lookin' for.

 

Can you give us more specifics on your 2.4 build? What will the static compression ratio be? What brand of 280 cams? Will you be using the Crower 2.4 kit? When you say "built head", do you mean full ported & polished with oversized valves, etc.? How high will you be revving this 2.4L.?

I don´t know why people want to go with such dinky turbos on big displacement Evos. IMO, even a 20G-LT will just be a bottleneck device creating unwanted backpressure, preventing adequate combustion chamber scavenging.

With a 2.4L. I wouldn´t go smaller than a 3065. I mean the 2.4 is almost a 25% increase in displacement and the 20G-LT is just a stock sized replacement turbo. You should be able to get any turbo, within reason, to spoolup with a 2.4, given a good tune and a set of cam gears.

 

If you have a built 2.4 it would be a waste to go with any turbo smaller than the 35r. But you should definitely run alky.

 

So how would you make this work (legally) in CA? Just curious . . .

450-475whp on 91 octane with a turbo that won't be laggy (even for 2.4L) is a tall order. The answer however, is a no-brainer IF you are willing to undergo a little more effort than a typical bolt-on turbo kit. You'll need to make a couple of minor changes to your hardware planning as well.

If you are seriously interested, I'll elaborate further.

 

I hadn´t noticed the 450-475 WHP on 91 part. Especially hard, on a smallish bolt-on or 30R, I´d think.

 

i love my 50 trim awesome power

 

I would like to have a turbo on my 2.4 respond in a fashion as my oem turbo responds to my 2.0L engine
please do, either here or pm

I have basically decided on a 3076r, i am not certain which exh. manifold.....I prefer the stealth look.....have people made decent power with the hafe exh manifold?

RRE /SBR use's them on their turbo kits.

 

If those power figures are truly important to you, this is going in the wrong direction. I'll PM you.

 

Thanks for the link ....you got me thinking about a 35r ams kit.....

 

My thinking behind my power numebrs are based on engine capacity.

The numbers below are general & basic, so dont get to worked up over the small stuff ( some viewers know who you are).

so i am currently putting down 360 whp / 180whp liter on a DJ....Whats that @ the crank??? ~425 +/- 7?

so 180 * 2.4 = 432. On top me rubbing on the engine before assembling it, the head will have +1mm valves, porting by me, ( i have +20 years in IMSA, CART, IRL & ALMS engine building & tuning w/18 manufacturer championships), aftermarket intake manifold, in addition to some friction reducing items i plan to put into my engine.

so 450-475 whp shouldnt be out of reach

 

Those numbers are not too important to me, but what is, it's transient boost response.

 

Agreed. That's why I went the route I did. My power target is higher, but the effect is the same.

 

3037s/3076r is a great turbo

 

anyone wanna elaborate in the thread?