04-24-2016, 07:37 AM
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CC Member
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Join Date: May 2006
Location: St. Louisville,
Oh
Cobra Make, Engine: A&C 67 427 cobra SB
Posts: 2,446
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Not Ranked
I have read that on highly forced induction engines, they groove a circle, I think on the block deck, but I doubt it would matter if it went on the head, just outside the bore. Then they lay a wire in the circle. The head gasket then partially crushes the wire, but end up with a higher pressure point, making a better seal.
I'm sure there is a detail in material, and thickness of the wire, and the shape of the groove. I have had some experience with gear pumps where the aluminum gaskets on the end plates crush and that affects the side clearance on the gear set. In fact, I wanted to change this design to a wire in a grove, but the bean counters wouldn't spend the money to save a known cost. No risk in staying with the status quot. They could predict the cost. But I digressed....
I'm curious why some type of crush material, such as the groove and wire is not put on top of the sleeves, in a sleeved engine. It allows some forgiveness. I may be somewhat remembering a diesel tractor designed this way, but I cannot trust my memory.
Anyway it was a thought.
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