like i said...forged pistons will eat the FRM sleeves.

power gains:
look at it like 10-1 CR = 190HP
11-1 CR = 220HP

of course the cams are different in the type-s h22 (11-1CR)
but u will have to change them anyway since stock h22 cams dont breath very well above 10.6-1

the other factor here is the nitrous, im not going to make a guess about how much nos ur block can handle when its pushing 11.5-1 CR.
the real issue with nos and (in general) preventing detonation is proper tuning and fuel management.

~kris

 

would you recommend running some type of stand alone management unit, like an AEM? right now I have a walbro high flow pump & an adjustable fpr, i'll also be running a set of high flow injectors (probly RC) Would a Vafc be able to control everything well enough w/ the stock ecu? or should I go w/ an aem unit?

 

www.pgmfi.org
check them out
if u can learn how to tune on your own it will save you at least a grand on EMS.

~kris

 

Don't get an AEM!

 

then should I just use the H22 ecu w/ a Vafc? also, what compression ratio are type-s pistons? what If I went w/ a higher compression non-forged piston? could I then get around having to sleeve the block & still have it run reliably if I ran forged rods??

 

type-s h22 pistons are 11 to 1 CR.

the idea here is that higher compression pistons are forged for a reason.

~kris

 

meaning....what? the Type S pistons should give me a good 220-230 hp in the hybrid build, shouldn't they? will they fit right into the H23 block?

 

These H23 vtec post crack me up, you might as well buy and swap either an H22a1 or H22a(type-s) It will save you a lot of money and heartache in the long run. I have a friend who has done it successfully, so he thought and the engine blew out within a year and a half. It wasn't even fast than my (stock at the time) Factory H22. CAUTION: ITS NOT WORTH IT!!! If you really really need an H23 vtec do this. Ditch the H23 buy an H22 and buy a bore or stroker kit. Walah u've got ur H23 Vtec. Enough of this already!

 

okay, that's nice, but about my previous question.... I already have everything all set & figured out (for the most part) for the build, so i'm going to do it. just trying to figure out the piston/compression/sleeve combination right now.