working on my buddys gsr build and i was havin a hard time finding the centerline because the cam dwells at peak lift, i was wondering if i could take a reading of the degree wheel when the cam reaches max lift less than 0.003 inch before and after peak lift. and then find the middle of those two positions and it would be the centerline?

and when degreeing a cam im making sure that i rotate the crank in the direction the engine normally runs. because i dont want to over shoot the position the crank is supposed to be in, so i wont rotate the engine backward. i figured it would throw off my numbers because the tensioner only works properly in one direction i think.

 

Honestly i would post this question in the all motor forum...lots of smart guys in there

 

It's pretty common to use .050" before and after peak lobe lift and split the total for lobe center line.If you have the cam card you can go by opening and closing numbers also.