I have a H22 in my car right now. I got a H23 block in my garage. I was thinking about putting my H22 head on that block. But I know when you do a ls/ vtec, you cant run big cams unless you change to a piston with a bigger valve releif. Like a vtec piston. Is it the same thing when doing a H23 vtec. Because I have Skunk 2 stage 2 cams. Also the chambers on my head are welded.

 

I don't know the exactly numbers, but claying the motor will definitely tell you.

 

I really dont mind putting the H22 pistons in the H23 block, but I dont want to end up with some 13 compression or something.

 

^ You wont' end up with 13:1 compression. Someone posted up what all the compression ratios would be. jdm h22a pistons i believe came out to aroun 11.5, and the type s were alittle over 12.0. CC your cyclinder head so you can find out what your compression ratio will be.

 

my buddy is doing and h23 vtec in his del sol im thinkin it will be pretty sick, he is runnin stock cams though for now with a ported and polished h22 head and h22 pistons