Hello. I´m rebuilding a GM 3.1 V6 engine and I need to replace only one piston with a new one. The new piston is about 40 grams (1.4oz) lighter than the original and I need to add some weight to this new one. I´m figuring out if I could put a some kind of pressure fitted hollow insert (steel pipe) into...

Ok, I have a 98 GM 2.2L block and all internals, with a 97 head on it. Both motors came from S-10s. From the research I did, with the 98 block and 97 head, I have increased the compression ratio by about 1.5-2 points, which puts me in the 10.5-11:1 range. Pretty high for a non-modded motor. Here's...