Studying this closely I think I may have to provide more clearance between the #5 cap rear and the "deflector" on the crank. The black squiggle is where I could machine .057" off. It may do the trick. I really don't think there is any issue with the seal itself. I am leaning towards a severe oil/pressure buildup that NO seal can handle. I'm also starting to think the windage tray should be left out to provide more room between the rear counterweight and the cap. J.Rob
Here is how the cap looks after machining. There is about double the room between the back of the cap and the deflector now. I figure it can't hurt. Also I am going to try Monte's method of seal installation. Also reassembling WITHOUT windage tray. Back on the dyno later today. J.Rob