Ok guys,

New to this board, but not new to performance. I'm looking for you engineering-minded guys that use numbers and logic to ascertain reality.

What is the power potential of the 2.4-liter with bolt-ons based on various dyno results. Let's standardize and talk in terms of Dynojet numbers. Sample modded car might be intake, custom straight through exhaust, header, pulleys, lightweight forged wheels. Are there other bolt-ons that produce power for the car? What is the max and the average seen power one can expect from bolt-ons on this motor? AFAIK there are no cams or ECUs for the engine, but please let me know if that's not the case.

Thanks!

 

In terms of a dynojet, the most power you're going to see from a full bolt-on set up is about 160 to 165 peak whp.

This isn't some V8 or a high revving four cylinder. The stock pistons are relatively low compression so to get power, you'd probably want to force some air into your engine or swap for higher compression pistons.

There really isn't any cheap way to get significant power from this car.

 

^ you can get more than that from bolt ons.

Import tuner got 149fwhp stock and added I/H and axle back exhaust and got 16fwhp and 7lb/ft torque. I'm hoping they update the car later on and add other mods. 165fwhp isn't that bad.

 

TAke with a grain of salt those magazines.

 

well depends what you consider bolt ons.... There is a new Throttle body available that will only enhance the effects of our cold air intakes. Replacing the header, s pipe, midpipe and axleback has showed a DYNO PROVEN 22 whp with a mmw header. Thow in a port n polished head which I technically consider a bolt on has been shown to give 21 whp with a mile port n polish job and not tuned AT ALL.

So with the I/H/E (Intake header exhaust) combo you're good for say 20 whp (again dyno proven by monster motorworks) and say 25 whp (21whp again dyno proven but with NO TUNING and this is only a mild port and polish job) right there you have an extra 45 whp with no tuning what so ever and a TB unaccounted for...

 

U can't just add the numbers like that, but that may be some what it, remember that the dyno for the head was with stock intake I believe, and that affects a lot for the head, for it has the space but it was not used to the max, also remember the dyno with the head I think also didn't have no GREAT exhaust, so it is all relative, I think that in complete combo u would see gains of maybe 30whp IMO. maybe a little more.

 

Why do you believe they would lie about the #'s? Sounds about right to me, they got 6-7 hp from the CAI, 3 from the exhaust and I think 6 or 7 from the header.

 

Well, What I doubt is the stock whp they got, so... I think it was 148whp or something like that.

 

Yeah I intentionally show low with the head for argument purposes. Minimally I think our car will gain 45 whp but with tuning and a very well done port and polish job IMO i think we could see 50-55 whp but again I used low numbers so that its a minimal number, resulting in less arguing over 5-10 whp...

But yes you're right I think a ported in polished head on our car could show HUGE improvements... But I'll know for a fact here veerrrrryyyy shortly

 

I see I see, keep us posted then, please.

 

for you mr. soros... the world

 

hahaha

 

Thanks, guys. So am I missing any bolt-ons that can be used? Any gains from the pullies? Also, does the DC header make good power?

Oh, and very curious about getting some documented results from this headwork that is spoken of. One other consideration if you really are able to get another 45 whp out of the motor. Will the stock injectors, FPR, and fuel pump accommodate that? What is the flow rate of the stock injectors?

 

yeah... a lot of staga 0 turbo guys run stock injectors...

 

Ummm I'm not a fan of CRANK pulleys, none out as of now have a dampener to lessen harmonic vibartions so do what you want with that info: Now about the other (alternator and water pump) pullies, yes they provide a bit more power to the wheels. They don't cause the engine to produce any more power it just makes the drive line more efficient therefore producing more whp.

And yes the DC header makes decent power, for the most part headers are even across the board with minor differences. I chose Alphawerks since it makes a bit more power in lower RPMs. The only header that stands above the rest is the Monster Motorworks due to its 4-2-1 design as compared to the other companies who utilize a 4-1 design...

I believe factory injector size is something in the ballpark of 340-360cc, actual numbers are available I just don't know them off hand. The stock fuel pump and fuel rail are good for something crazy like 700cc injectors. Again actual numbers can be found by searching thats just off the top of my head, I KNOW for a fact its enough as some of the guys puttind down over 300 whp are still on the stock pump and rail...

 

I believe the stock injectors are 372cc.

 

wow... bigger than i though lol

 

yep :D

 

for some reason the song "fatty Girl" is running through my head now lol

 

never heard of it, but that's okay.