Small-Block Chevy Test Engine - Danger Mouse Part Two
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Powerhouse upgraded the 461 GM castings with new valve springs and new 1.94/1.50 stainless valves. The heads were milled to a 62cc chamber volume, which puts DM right at 9.4:1. That's too high for 87-octane gas, so we ran all tests on 92-octane premium 76 Performance unleaded. View Related Article
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