i installed an MS4 and am waiting on money for PRC stage 2.5 LS6 heads. what hp should i expect with 30# injectors and a ported 90/90 intake? these will be 59 cc chambers. 02 SS M6 with all bolt-ons except EWP. thanks for any help!

 

also how much would the ls6 intake hold me back compared to 90/90?

 

did you install that cam on a factory shortblock

 

If you did you are gonna have to flycut with the 2.04 valves and the 59cc chambers youll run into PTV issues like crazy. So when you get those heads be prepared to do cutting.

 

yes it is on the factory block. i already have everything to flycut out in my garage so that is no problem...anybody have a hp guess with both ls6 and 90/90 intake???

 

Id say 430-440rwhp

 

anybody else??? i expect at least 450rwhp...

 

Not sure what you have for exhaust, but assuming it is free flowing and that you run the .040 gaskets I will guess 460-470 on a dynojet with a great tune with the LS6, another 5-10 hp with a Fast 90/90 or another 20-25 with a ported Fast. For the money I will mot even consider a Fast at least not unless i got a deal on one ported from a reputable source (Tony Mamo, Vengeance, etc.).

 

We have them on sale for 889.00 ported AND shipped.