Okay, so I have a 2000 GT. I'm fairly certain that the cam and internals are stock. Anyways, I haven't been able to find any super reliable info on the net about stock specs. I'm trying to figure out Valve Lift for the exhaust valves. So far here's what I've found. Stock cam lift is either 504/531, or 505/534. The stock rocker arm ratio is 1.80:1 or 1.81:1. Using the Valve Lift formula to try to figure out valve lift is giving me this for valve lift:
Lobe lift (exhaust) x rocker arm ratio = valve lift so...
.531 x 1.80 = .9558" valve lift?? I'm seriously doubting this and I would like some clarification. Am i messing up somewhere here? Any help would be great.. basically the whole point of this is I'm trying to calculate proper header primary tube size as close as possible, and for that equation i need valve lift. Thanks again.
Lobe lift (exhaust) x rocker arm ratio = valve lift so...
.531 x 1.80 = .9558" valve lift?? I'm seriously doubting this and I would like some clarification. Am i messing up somewhere here? Any help would be great.. basically the whole point of this is I'm trying to calculate proper header primary tube size as close as possible, and for that equation i need valve lift. Thanks again.