deck height:

[art leong]

Originally Posted by Jeff Lee

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.

It was a stupid no common sense rule if the piston was specified to be .001 down the bore if you were 1 inch down it would be fine. If the specification were .001 out of the bore 1 inch out would be legal. What purpose did the old rule serve?
It wasn't a problem as long as there was more clearance than less. Till I drove my car to Maple Grove, set the record with a motor that had never had a head removed. And had .034 to little deck height. Then curt leshure had a problem, and I had a bigger problem.
As far as tolerance goes my motor had 134,000 miles on it was never out of the car (or had the head off) and it was .034 from the stock (listed) specs.
And on some motors adjusting the rod length is not possible.