Looking to boost my compression and did some calculations with kb399 pistons. These domed pistons would put me at 9.75:1 static compression. Would this cause me detonation problems on 91 octane with open chamber iron heads? Current cam has intake closing @0.050 38 ABDC and at 400 feet above sea level which according to the Wallace calc gives me 9.04:1 dynamic compression. Let me know what you think.
