Quote:
Originally Posted by blykins
Why such a big duration split? Hardly ever necessary at all.... Kinda counterproductive to have a longer LSA but such a large degree of overlap.
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Possible the cam designer feels the AFR exhaust port needs help with greater duration? Especially with 'only' .560" lift??
That was the thinking (years ago) in my Ultradyne 244 / 255. And in my case that was right. The original iron MR exhaust was weak.