C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Zero Decking Block-Will SR Base Need Machining ??

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Old Feb 3, 2006 | 09:24 AM
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Default Zero Decking Block-Will SR Base Need Machining ??

That about sums it up
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Old Feb 3, 2006 | 11:18 AM
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Probably not. I have a deck height of 9.005. I also had .025 cut off the heads and run an .039 gasket. Worked out ok.
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Old Feb 3, 2006 | 11:19 AM
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Forgot to mention, I did have an .005 cut off intake just to true it up. Not for port alignment, but for flatness.
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Old Feb 3, 2006 | 11:38 AM
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Originally Posted by AGENT 86
That about sums it up
Generally no alignment issues arise until .030" or more is cut... And if you cut .030" off your block you'd better check piston to head clearance before worrying about intake alignment!
-Jeb
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Old Feb 3, 2006 | 11:39 AM
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Your machinist should have a chart that shows how much to take off of the intake side of the heads and the bottom of the manifold when milling the heads. For these purposes, decking the block is equivalent to milling the block surface of the heads. Of course if the heads have been milled, the amount of head milling should be added to amount taken off of the block, to figure what to take off of the heads and/or manifold.

RACE ON!!!
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Old Feb 3, 2006 | 11:46 AM
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Originally Posted by jburnett
And if you cut .030" off your block you'd better check piston to head clearance before worrying about intake alignment!
-Jeb
Originally Posted by AGENT 86
Zero Decking Block-Will SR Base Need Machining ??
It sounds like it has been checked and that it is whatever the head gasket thickness is. It is very possible it might have taken a .030" cut to zero deck the block.

RACE ON!!!
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Old Feb 3, 2006 | 08:38 PM
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Thanks guys
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