I think he will maybe get about 10hp max from the header and exhaust. You guys froget that the headers he will be testing out are good mainly for midrange power gains, and only minimal if none on the top end. The exhaust is what is going to open up his higher rpm power. I am hoping for the best for him though.

 

I believe that is what all of us are doing at this point. unless you know for a FACT that he will get exactly 20HP with exhaust plus the Test-pipe,

 

Oh, I agree. We're all guessing, however, folks in this thread tend to be a wee-bit optimistic.

 

I agree with you also, but its been done so many times its hard not to be optimistic....... exhaust makes power. period

minus, the DC header he is going to test, possibly the megan too, has yet to be tested 3rd party.

 

Wildcardtrd, cut a piece of cardboard so that it can lay from the chassis cross brace infront of the, to the top of your radiator and all the way to each of the inner fenders. This will make your passes much more consistent. Then I reccomend fabricating an aluminum piece roughly the same size to mount permenently on the car. I promise you consistent pulls and more power if you do this.

 

do you think the heat will still hurt his power even though he is already running ITB's with a vented hood?

 

Well, consdering Ive tested for this, with the same stuff he is running, absolutely. This is in my opinion based on 14 hours straight on the dyno a MUST DO mod if you have ITBs, at the 260hp level its worth 15hp proven.
IATs are dramatically affected by the radiator (ironically radiating heat ) and makes dynos completely in consitent especially when you are trying to tune.

Oh and by the way here is some DUH factor for you: ITB cars are MUCH faster then a dyno will ever allow you to believe, aside from the pumping loss advantages the super cooling effect of the vehicle in motion has a HUGE effect on actual power at speed. Dynos mask this effect hugely. You look and the numbers and go "wow, I didnt gain but a lick and a tick" but the car is genuinely faster at speed. Heat management is HUGE, almost as huge as getting your cam phasing and grind right.

 

[QUOTE=MINES13,Jan 31 2007, 10:13 AM] Well, consdering Ive tested for this, with the same stuff he is running, absolutely.