Re: Various CL Pickings

Posted by Ross On 2022/11/8 21:31:45

Most flatheads have the plug over the exhaust valve. The idea is that the flame front moves out from there. If the plug is elsewhere then the flame front must move toward the exhaust valve. In that case the pressure wave of the burning mixture may cause the unburned mixture in that very hot corner of the head to explode rather than combust. Knock knock.

Flatheads have very high turbulence on the compression stroke as the mixture is quickly squeezed toward the valves when the flat topped piston comes within a gasket's width of the head.