Is that 0.075 at the rocker thread? If so, with stock rockers, you need to multiply by 2.54/1.54 to get the actual preload at the lifter.

 

The best way to get the proper preload on these lifters, is to install the lifter as normal, then drop in an adjustable pushrod length checker, then, install your rocker and trq down to 22ftlbs. Then adjust the pushrod till you have zero lash at the rocker base, remove, then measure. Then add .030 to that measurement. That got me to .035 preload, so its a good method.

Adrian

EDIT: forgot to mention that you have to make sure you're on the base circle of the cam lobe you're measuring on...

 

holy hell!
They made you an extra special set of variable length pushrods. I bet you feel really special.

 

I was a lil surprised by it to say the least! I expected more I guess! They were truely custom though!

 

WHAT??? I have never seen that yet....

 

Here is my figuring. The rocker tip is on the valve spring. The valve spring won't compress (assuming you are on the base circle of the cam all of the preload will be at the lifter). As you tighten the rocker, it will pivot on the valve spring through the lever ratio because you have two similar triangles, so the ratio is the distance from the valve tip to the pivot point and the distance from the valve tip to the pushrod. The stock rocker is about 1.54 rocker ratio at rest, so the ratio is 2.54/1.54 or approximately 1.65 times the rocker movement.

Hope this explains it, but it makes sense that if you tighten the rocker down the pushrod will move more than the rocker pivot point.

 

I can check again when I get home next week, but honestly not sure right now.

Whats the operating range of the Morels?

 

They say .025-.035 cold. Much tighter than stock or comp replacement.