Quote Originally Posted by Batlground
and when will people realize that CTR pistons are MUCH HIGHER COMPRESSION that whats published on the internet.

P72 head/B18C Block

STD = 12.924594026551906
.25 OS = 12.989047869209281
I calculated the compression to be 12.042422511586593:1 using the fact that CRT pistons have a 8.63cc dome, using the B18C1 piston to deck height of .030, P72 head combustion chamber of 41.60cc, oem B series head gasket thickness of 0.0290, and of course 81mm bore, 87,2mm stroke. I don't know where you are getting 12.92:1... I do my own math, but I do use some measurements found on the internet (combustion chamber cc, piston to deck height). The only reason I can figure that I am wrong about the compression ratio is if one of these measurements is wrong. Tell me what I'm doing wrong so I can fix it. Dont just say I am wrong.