Quote: Maybe some of you guys should look at that guys kit, it moves the shaft up to correct geometry and back to center the contact patch, the only compromise I see is the PR geometry will get worse, not a big deal on a BB but a SB is already bad. Of course a W2 is worstest yet and they can rev good so
The CAD drawings I've done say the shaft has to move down to correct geometry with a high lift cam. Moving the shaft up makes things worse on every simulation that I've run.
If you have a perfect sweep with a .600 lift cam, and then change to a .800 lift cam, the wheel will move closer to the rocker shaft at full lift. I agree, the shaft needs to go down. I moved my T&D 1.8 sep. shaft setup down 1.2mm and still got more scrub after the wheel starts to roll back( against the rockers shafts).
Of course! If your geometry was correct with a given rocker and you increase the lift the shaft will have to go down. The problem is the cast in stands in factory type heads and adding longer valves or roller rockers or both, and the shaft has to go up, not down.
Mike Beachel
I didn't write the rules of math nor create the laws of physics, I am just bound by them.
