What is Proper CAM & TAPER MEAN????????

[SlowPed]

I just baught and special coated piston from ADA, it says it has PROPER CAM AND TAPER!!!!! Whats that mean?

[Slimcandy428]

All you need to know is that when the engine is at running temp the piston is perfectly round (like the cylinder) for max performance and best clearances between the piston and cylinder. This is unlike zenoah pistons which are made perfectly round, and as you know the piston at certain places Ie Exhaust and intake skirts will vary in temperature. This means the hotter side will be expanded more then the cooler side.