Deck height variance

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Re: Deck height variance [Re: Since1822] #2744713 02/19/20 08:12 PM 02/19/20 08:12 PM
Joined: Mar 2003 Posts: 9,100 Rogue River, OR Jeremiah master
Jeremiah master Joined: Mar 2003 Posts: 9,100 Rogue River, OR	Originally Posted by Since1822 Wondering what acceptable deck height variance is after machine work is done? 505" stroker and the variance is .004 between lowest and highest. Good or no good?? Another question, I have the icon 842 inverted dome pistons, eagle crank and 7.1 scat Rods- pistons in the hole .010-.014 with 440 source heads- Question is what Head gasket thickness recommendation? I'm guessing use the .027 or .030? Thanks It depends on how they measured the deck. If it is cut off of the crank c-line or if it was measured with the crank, 4 rods and a piston in 1/7/2/8 using a bridge and height mic. In short you either blueprint the block arbitrarily to 9.980 or whatever or you deck it with respect to where the pistons are in the block. One of the professionals can probably explain this better. FWIW on my stock, undecked 400 blocks with Diamond 1.32" CH pistons every corner hole had a different measurement from the block deck to piston height. The fellow that did my machine work cut the deck based on those measurements. Make sure to label the pistons to the correct cylinder number in case you want to remeasure, etc.

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