All mods are in my sig pretty much. Basically its a H/C car, full exhaust and everything already. It has a 58mm TB on it right now, When I get my port-matched intake on how much HP will it free up? 10-25 rhwp I was thinking??
The heads flow very well, 284/225 @ .6", I want them to flow to their potential

 

anyone documented this gain??

 

Your going to need some porting of the intake by someone that knows what their doing, not just port matched. Even then I would think your setting your hopes a little high.

 

maybe 10hp

 

I've heard gains of around 10hp float around alot. A gain of 25 may just be expecting a bit too much.

 

Probably about 10-12 rwhp. There is a post where a guy added a ported intake and E-waterpump to his LE1 setup and gained about 22 rwhp. The waterpumps are usually about 8-10 rwhp so i'd assume the intake made up the rest of the gain.