Most of my mods are in sig, and I'm currently somewhere around 10psi making somewhere around 350 whp on a dynojet. My question is: Is there any more power to be had short of having the motor built?

My short-term plan is to get a 3 bar map sensor and up the boost to around 13 psi, but other than that I'm not sure.

Will I see significant gains with a AEM C2DI? A different manifold? Am I running enough boost to warrant an oil cooler/radiator? Or would it just be a waste to do anything short of opening up the motor and spending lots of money?

 

The exhaust is very restrictive on the stock head. A proper porting with oversized valves should give you another 12-15% or so. I'm running an Alaniz head and it is good for at least 50-60 hp.

 

You need bigger injectors.

We've got no clue what manifold you're running.

Those 4.77's will not help you with traction at all.

 

Get a 3' Exhaust and a Header

 

I swear I love reading you posts, it's like comic/ignorance gold

He's got a 3" exhaust and he's turbo...lol

 

 

Maybe you mean downpipe! Turbos don't have headers

 

Although it won't give you a lick of power, I've cracked and broken enough engine parts to suggest to anyone with the means to pick up block sleeves, head studs, rods, and other "bulletproofing" parts. Because you can't enjoy 400hp if you only have it for a few moments.....

 

Thanks for all the replies guys.

Sideways - I have to admit I haven't even thought of this. My only problem is that technically this is my only car, and although I could go without it while the head gets worked on, I'd rather not. I actually know someone local who could do it, but it's a part-time thing for him, and hes got other priorities right now.

Kane - I completely agree, I actually ordered a comptech diff from ricks2k a few days ago and plan on cryo treating my old 4.10's and putting them in there. And, yes, I know I'll probably need bigger injectors if I turn the boost up anymore. As for the manifold, I'm not sure who made it, but its just a plain old vanilla log style.

Which is something I have been thinking about. I realize the turbo has a lot to do with it, but I've noticed a few people posting some impressive numbers (higher than mine) and for some reason I can't help but think its because of their manifold. Can someone explain to me how/why a manifold can make more power with same turbo/boost?

Spaceman - I'm hoping that with a good tune and 13 psi that none of that will be necessary since I have the 2mm HG. Although, I will admit I have been worried about temps lately. I might just upgrade the radiator before I turn up the boost more, or before next summer at the latest