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Recommended B20 Head Gasket bore size? 120-130

posted by  Gregxster on  Sun Jul 13 09:56 CST 2014
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last visit: Mon Jul 14 08:15 CST 2014
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I have a B20, recently rebuilt, that I am getting some "ping" under acceleration (~3200rpm). I did not "zero deck" the block. I have 0.014" deck height. The calculated CR is 10.3:1. I used a stock 0.035" thick head gasket. I am using 91 octane (California) gas and have reduced my max advance to 32degs. I am looking at getting a Cometic 0.027". The block was bored and fitted with new +0.030 Mahle pistons.
My question... What bore size should I use 90mm or 92mm?

Thanks,
Gregg






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