I agree, piston slap doesn't sound that way.
As far as the high octane fuel, how is that going to help get rid of valves kissing the piston domes? Do you think it's pinging we hear? I'm pretty darn sure its metal to metal contact.
Maybe if you have a different interpretation you can explain it?
I'm just curious, not trying to be a Diick by any means.
warmonger
