Originally posted by Motorman
I would only use ceramic on the piston crown, stay away from anything on the skirts and cylinder bore. Diamondlike (the great JP,RB secret)works well on the crankpin and wristpin though you will need to resize the bushings to compensate, and teflon benefits other areas.
Yes the ceramic coating is only for the top (crown) of the piston... after its applied you can take a torch and heat the top of the piston and the underside stays cool... amazing stuff. I thought it would help keep the air/fuel mixture in the crankcase cooler... I know it really lowers oil temp in our racing motors.