im planing to go straight pipe. im debating on the pipe size. anyone have an input?

 

You need to provide more information. If your running a high boost FI set up, i think 3'' would be fine. However if your not boosting IMO 2.75'' or 70mm 2.73'' or so is better.

 

So far theres only 2 OTS test pipe sizes, 63mm and 70mm. Only a select few companies make a 75mm test pipe.

What other exhaust mods do you have? Header? Exhaust?

 

im either ordering a buddy club race header or making a custom header myself, i have a comptech supercharger. and im planing to get a 10lb pully.

 

3 inch.

 

Do you have any proof of this? Or did you just hear this from someone, who heard it from one, who heard it from someone, who heard it from someone. The internet has turned me into a realist, due to this. I believe nothing until I see proof; in this case a dyno graph.

It has been dyno proven that 3" makes HUGE gains on Honda motors. It has also been proven that open header yields the biggest gains. After seeing countless dyno's proving this, I've come to the realization that everything after the collector is a restriction. After the scavenging, which takes place in the collector, their is nothing else for the exhaust to do to effect flow positively. The few tuners I've talked to about this, agree with my 100%.

 

So where are your dyno graphs? so where are these HUGE gains on the s2000? last time i checked bolt ons do not give you HUGE gains. what WHP is huge gains to you? also F20C and F22C motors are WAY different than other honda motors. you might get 15-10 whp on exhaust on a civic but u wont get more than maybe in a rare occasion MAX 5-10 whp. And thats pushing it a little up...

 

LOL, ditch the header and get a 14lbs pulley with a headgasket and aem and make 450whp.

 

what else should i do with a 14lb pully? like beefing the motor up. dont wana blow it.

 

All u need is a 2mm or 3mm gasket and u can make that power. Its all in the tune. Our motors can make 500+ stock.