Thanks for the info. I was asking cause I was thinking about using them in a turbo gasoline engine application. I was trying to figure a strong set of rods/pistons I could get from the scrap yard and diesels are probably the only things forged there. Cast pistons don't seem to tolerate detonation well. I was thinking if they handle 21:1 plus boost they might be able to handle 8.5:1 plus boost. 8.5:1 with 20psi in a gas motors give about 20:1. Any thoughts on this? Thanks again