what is....

[mity2]

Shotpeened, and knife edged mean?

 

[Stork_]

Shot penned is kind of like sand blasting. It's a process to remove imperfections in the machined surfaces of engine internals. Oh ya it also forges the part making it much stronger than before.

 

[bdcardinal]

knife edging machines the counterweight on the crankshaft to make it more aerodynamic. a slight knife edge will have the forward side of the counterweight rounded off a little. a full knifeedging will have the counterweight look like an airfoil. this keeps oil from sticking to the crank and ends up with a few more hp and more of an ability to rev higher.