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ok, after much thought and irritation i have decided to rebuild a GSR block. Now i'm trying to figure out why on a turbo build one would use a lower compression piston. Say 12.5:1 N/A as compared to 9.1:1 turbo. My thinking was the higher compression one would need less boost to produce more...

Ok, here is the low down. I had to rebuild the motor due to a spun bearing back in 8/08. After going over my options I decided the best choice was to do an OEM rebuild with a few aftermarket parts. Here is the build: B18c piston set w/ rings 81.5mm B18c engine gasket set B18c OEM oil pump B18c...