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Old 10-21-2008, 02:12 PM   #20 (permalink)
some_other_dave
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Quote:
Originally Posted by roflwaffle View Post
Straight fours fire in pairs every 180 degrees...
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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