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Steel Soldiers now has a few new forums, read more about it at: New Munitions Forums!
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Diesels and vacuum....
(most) gasoline engines regulate power by regulating manifold pressure using a throttle valve. At part throttle, the engine is literally choked off. This reduces the amount of fuel going into each cylinder. At idle, most gasoline engines develop about 18" of vacuum. That is 18" of mercury on...