Same thing that happens to all of us that boost more than recommended all the way to redline without timing retard. You think you're engine is not detonating because it's hard to tell on these engines and when you race you tend to attempt to squeeze every last ounce of HP out by taking it to redline where your timing is waaayyyyy to advanced. If you're blowing all your oil out.. I'd put money on it that it's your pistons. Right where the rings sit their cracked. And yes, if it's making that much noise.. you're bearings must have been spun also. Way back when I had stock pistons and rings I used to boost more than 10 psi all the time at the races.. Actually took to to 14 from time to time. But.. I've had 450cc injectors and the MSD-DIS2 ignition (retarded ignition at top end as much as it can go) and I used "TRICK" high octane racing fuel. With proper tuning conditions.. you can boost more pounds per square inch more frequently. Like HRC, I've taken our engine to the limits and beyond with trial and error. All I know is that it's not gonna happen again. I'm keeping it at 12psi with a built motor and I'm gonna work on the show aspect.