Panic, very interesting about the “triangle”. Makes a lot of sense to me that to a point at least, the overlap amount would would be a big factor in how much vacuum that the exhaust wave could pull on the intake port. Too much overlap could in theory at least, pull part of the intake charge right out the exhaust pipe! Please forgive me for asking a question, when I try to figure my triangle do I multiply my overlapp in degrees a .050 lift x valve lift at that point? Jay
