the original compression suppose around 10.5 and now the compression is 10
r u sure ur measurement is correct way to do it? go ask some workshops on how to measure ur current compression ratio and dont be surprised if they tell u they need to use water to get a proper and accurate compression...
also theres the dynamic and static compression thing too
now heres the most important thing... after the high compression pistons.. did u get ur car
PROPERLY TUNED? with compression increase dont be surprised ur ignition timing chow...coz thats wat happened to me
before with VAFC and stock B20 bottom got 185whp n 18.8kgmm ... after install high comp pistons... and tuned with VAFC got 186whp n 20kgmm...VAFC no ignition tuning... just a/f ratio...n everytime i go dyno the tuner will say my car engine is very rough... coz the graph is like earthquake graph...
then i got Crome which has a/f and ignition tuning... same setup...just change tuning hardware only... 200whp and 22kgmm. n a much smoother graph too.
if u havent gotten it properly tuned... do it.. then come back n see if theres anything to complain or not...
also, one more thing my sifoo has mentioned before...basically to make proper use of high comp... should get high cams