[Scott Roberts]

Originally Posted by mgarblik

Just happened to catch your post. Believe it or not, we are still on our first set of head gaskets from 2011!. 10 head studs, 9/16". The secret is the solid, billet head. Thick and uniform around the studs, Eric did a wonderful design job leaving lots of clamp column around each stud. It's clamped down tight and doesn't move. Pistons, well, that's an entire different story. The fuel guys just call them "fuses" and we do go through a bunch of them. The Darton sleeves are super tough. We can destroy a piston and put a new one right back in the same sleeve, not a scratch most of the time. The sleeves get torn-up if the piston damage is bad enough to twist the hell out of an oil ring. Then the oil ring acts like a stainless steel cutting tool. We have killed only one sleeve so far. Main bearings need tons of oil and tons of clearance. Then they seem to live OK. But I am always concerned.

If you dont mind sharing, curious what kind of clearances you run..we ran .005 on mains and .004 on rods with alcohol with 140psi. Never had any issues bit not running at your hp level either