piston out of my h22a









best part, cylinder walls = spotless...

if i had my camera charger id show you better pics, its broken right off almost like it was jus t a bad cast. you would think a 10.5:1 compression piston would be able to handle a little more compression.

 

just pulled the other 3 pistons... ALL of them have cracked or broken ringlands... still no scores in the cylinder walls and all of the rings are still in awesome shape.

 

boosted or no? ive seen that a couple times on boosted b series with stock pistons. what were you runnin for psi?

atleast the cylinder walls are good. All you gotta do is get a new set of pistons and rings and maybe a light hone. would be a good time for forged though.

 

Most broken lands I have seen is from a lean mixture causing detonation, and you don't always hear it either. Excess Cylinder wall clearance can do it to. Just some thoughts.