Quote: Let me pose this question a little differently... What would be the result of using a cam with more exhaust duration than was necessary? Obviously, we would have a bit more overlap and contaminated charge but how would the engine react?
I can tell you Comp's thumpr line of cams make great power, wide powerbands and work with low and high compression. The have at least 18° more duration on the ex. side advertised, then at .050 it gets closer to the intake side, and by .200 they are almost equal. This works really well with the tight lsa and recommended 5° advance. Big Joe thinks it's the tight lsa that makes the power but I think it's a combination of tight lsa, 5° advance, and smooth long lazy exhaust lobe. And they sound nasty.
You know, there is not a single man or company that has it all figured out to the point where they can spec the PERFECT cam for an engine without some type of compromise. This could be debated for ever and ever...and probably will be...LOL!!!!!
