| Re: My Jesel Saga
Dan,
Someone has hijacked your screen name over on NMRA apparently. I thought it was you, but I hadn't looked at their profile. Assuming did it to me this time.
Bill,
Actually the Jesel kit comes with an adjustable pushrod length checker and very complete instructions for getting the proper pushrods. They obviously push you towards theirs, and there are a lot worse ways to go, but the basic information is universal and accurate. If you happen upon the article you mention or know exactly where it is, sure go ahead and send it to me. One can never know enough!
As far as setting the geometery of the rockers, I will probably just shoot for a compromise: Jesel says the plane through the center of the rocker axle and tip axle should reach 90º to the valve stem at ~.75 lift. This puts the max mechanical advantage in the area of valve lift where spring pressures are the greatest. The mid-lift theorists basically ignore this aspect and only focus on efficiency of motion, or fidelity of the transference of the cam lobe profile to the valve tip, and try to reach the orthogonal point at .5 lift. So, if I can get the 90º position any where in between .5 - .75 lift without having to machine the stands or the set of shims that came in the kit, I'll be a happy camper.
Regards,
Lynn |