What is actually scary is I still feel the same way! When I finally think I have a solid handle on something--Wham! An example comes along and turns almost everything I know on its head. Back to square 1. J.Rob
I should be more clear. Cams: LSA trumps duration when considering things like vacuum- vacuum equals = part throttle tip in, mileage, ease of tuning, part throttle torque under peak torque, and a much wider and user friendly power band.
Also again:Increasing LSA has a much greater impact than reducing duration in order to achieve a certain idle/power curve/drivability.
Corollary : Narrow LSA will negatively impact idle vacuum, narrow/abrupt power curve and make driveability/tuning difficult--To a MUCH GREATER DEGREE than a wider LSAwill.
Look all of this is in countless publications and all over the place. All I am saying is what I said in post #1----Cam 2 cam and duration 2 duration the cam with the wider LSA will be the better choice for the street bound crowd. Also given the choice I would prefer to widen the LSA than reduce duration to target a given HP goal AND retain any kind of manners. J.Rob