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Semi Closed Cmbustion Camber


Dave Patten
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This head started out with a closed combustion chamber. I call it semi closed because typically there is a quench area on both the spark plug side and the port sides of the head. The chamber has been modified on the spark plug side to remove the quench area on that side. The combustion chamber volume is 45cc. The valves are also over sized 44mm intake and 38mm exhaust.

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Barn Find 510 in NH

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