Bonneville America Forums Forums Technical Forums Performance Mods Huge Performance Increase the Easy Way

but it's from how much the engine can compress the fuel before it's ignited. The biggest problem with compressing an air/fuel mixture is that if you squeeze it TOO far it'll ignite all on its own. This is what causes "pinging" or "knocking..............................Vaporization drawn from compression and the heat of the engine? correct? Speedmasters don't have restrictor plates do they or at least if they do they are fiber- form fitted like the rest of the airbox or rather formed as part of the box itself? Speed.