Quote: After reading a fair amount about rocker geometry. I settled on the theory that the center line of the rocker arm should be at a 90 degree angle to the valve stem at mid lift. What happens is when there is more valve lift the rocker pivot in relation to the valve tip needs to be moved up. It's simple math to figure it out. Doug
There's a little more to it than that. The valve is not on the same angle as the stand so it must be offset as well. Now how do you accomplish moving the shaft up without major surgery?
That's a good question. You can shim the shaft. That will not address the shaft center line to valve stem dimension. In my case I have individual shaft T&D. I actually offset the rocker stand mounting holes in the head. The most common solution would be to mill the stands and replace them with blocks that have the rocker shaft hole in the right spot. Can you elaborate where your theory is on rocker to stem location? Thanks Doug
