deck height:

[Jeff Lee]

Originally Posted by art leong

Jeff how confidant would you be with a zero deck height spec? Can you be sure the bearing didn't wear a bit, or the rod didn't stretch a touch? And as far as piston to head problems won't a thicker head gasket achieve the same thing?
If you can't build in a little safety margin you are going to get tossed for stuff that won't help performance one bit.

Then pull the deck height spec out of the books. Just list a tolerance for gasket and deck height combined.

I'm at a loss to figure out how all those zero deck engines made it through tech for 35+ years before NHRA changed this rule. Guess those old engines did not have bearing wear or rod stretch?
Still trying to figure out why a rocker ratio is so important when using this issue as a comparison.