Quote:
Originally Posted by some_other_dave
Huh? The firing order on most Honda I4's is 1-3-4-2. Nowhere do two cylinders fire at the same time.
I can't think offhand of any I4 engines that fire in pairs. Most fire one cylinder every 180 degrees of crankshaft rotation, which is every 90 degrees of camshaft rotation--one quarter of a full two-crank-revolution "cycle". I think you may have gotten confused by the difference between the two (which is regrettably easy to do).
-soD
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A complete cycle (intake, compression, power, exhaust) on all 4 cycle engines is 720 degrees or two revolutions. 4 cylinder engines fire every 180 degrees for a total of 720 degrees. 6's (even fire) -120 degrees, V8s-90 degrees
