Quote:
Originally Posted by baldlobo
any 4 cylinder over 2l creates a secondary harmonic, that can distroy engines; harmonic balancers are needed along with heavier crankshafts.
where as the 6 cylinder needs none of that.
gm engines
2.5l I4 110hp; 2.5l v6 145hp; 2.5l I6 154hp
195ci pontiac I4 vs buick 3.0l v6
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Can you explain further the secondary harmonic issue?
Also, on the GM engines, how does the 2.5l V6 and I6 get better HP? That is what I was trying to get at with the original question.