combustion chamber volume

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Originally Posted by Bobby Zlatkin

sbc 76cc head.

Approx. how much needs to be removed from the deck surface to reduce the chamber volume 1cc? I know it's not an exact ratio as when you get deeper into the chamber you have to cut more to remove a cc. Just looking for a general rule of thumb.

Trips back & forth to the machine shop are both costly and labor intensive.

Thanks

Bobby,
It is difficult to pin down an exact figure but I have found it usually takes .006"-008" to remove 1 cc when the head is virgin. I realize that the word virgin is never used around the drag strip but I am using it anyway.
thanks, Roland