Originally Posted By: intergrated j 78
Mitch, for what it's worth my 1980 stock truck engine has a chamfer also. Please correct me if I am wrong but won't the increased compression height and lack of dish help some with compression? Mitch were the pistons that came out of the engine chamferd? Another question that hopefully someone with more knoledge than me can answer, does a chamfered edge kill off quench even at 0 deck height? Jay 6155


As I understand quench, the chamfer will kill it just like a dish since the air/fuel mixture will squeeze out between the flat top and head, but at the chamfer the lack of squeeze will counteract it. So you can't get the extra dynamic compression out of it, most sources estimate that you can go between 8.25:1 and 8.5:1 with proper quench.