Blueprint specs.

[Rsmith38]

Originally Posted by Greg Reimer 7376

My 327 calls for .002" tech height and a gasket thickness of .018" for a total deck with gasket of .020". We all know you would NEVER set an engine up that close. It would'nt work over 3000 rpm without clearance issues.This is nothing but a legal minimum. It's OK to have more deck height and gasket thickness than the minimum. Long ago, I built a 283 with a standard bore used block(try finding one now),and after getting the block and the assembly back from the machine shop, I trial assembled it without rings just to see what we had.We had .050"on one bank, .038"on the other, and that was without gaskets. I never remember hearing of the tech team measuring anybody's gasket thickness in a tear down situation. Anybody have their deck height checked,either?

Yes - Both NHRA and IHRA checked deck height and gasket thickness on my Jeep when I set the records - both were very professional -

[Michael K]

Thanks for the replies. The important thing seems to be how NHRA goes about this in a tear down. I wondered why the specifications include the gasket thickness.

[Bob Mulry]

Hi,

Just adding some info............................

Measure used and prior compressed gaskets when calculating total deck....

NHRA measures the gasket that was on the engine in the area that was compressed.........

If you measure a NEW gasket that wasn't compressed you will come up short on your desired deck height.....

Gaskets will compress a bunch.....

Just sayin',
Bob

[Tom Moock]

Micheal K, Stock only, they also measure on the side of the piston how far down the top ring is on the piston. Tom