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Chuck Norton · 12-03-2007, 11:21 PM

1. Use the pin dimension as listed on the NHRA sheet. Whatever it says is the operative spec.
2. Use the compression height for your application as listed.
3. Use the combustion chamber volume spec as listed. Don't factor in valve notches. It is what it is.

Div 5's information on deck height is the way it was a few years ago. The current rule allows moving the piston/deck height to accommodate the available gasket. If you have to push the piston out of the hole a few thousandths to make up for the fact that the only gasket available is too thick, it will pass.

12-03-2007, 11:21 PM	#3
Chuck Norton Member Join Date: Dec 2001 Location: Covina, CA Posts: 474 Likes: 108 Liked 89 Times in 19 Posts	Re: Recommendations for mopar 383 ss 1. Use the pin dimension as listed on the NHRA sheet. Whatever it says is the operative spec. 2. Use the compression height for your application as listed. 3. Use the combustion chamber volume spec as listed. Don't factor in valve notches. It is what it is. Div 5's information on deck height is the way it was a few years ago. The current rule allows moving the piston/deck height to accommodate the available gasket. If you have to push the piston out of the hole a few thousandths to make up for the fact that the only gasket available is too thick, it will pass.