Originally Posted by Richard@WCCH

This engine had oil consumption problems, a serious cause for detonation. Also the pistons had a perfectly round dish and they're not quench friendly.
I think when added together these factors led to the detonation problem. This go around we're backing the cr down slightly.

As far as cam split is concerned, I'm not a big fan of reverse split grinds because the off boost response suffers slightly and EGT's are elevated due to the early closure of the exhaust valve. Street driving offers many challenges and compromises and in Chris's case I feel his new grind will balance off boost driveability and max boost performance. I did make an adjustment in the final decision for his cam. I tightened up the split to within 2º. This cam will combine a respectable idle with nice street manners and still allow for a broad power band that will pull beyond 6000rpms.

Richard