Lets talk Roller Cam Lifters.

Cudafever said

Ok maybe it's the way the cam is ground????
I found it by the way and here is the post.

many of us were thinking of a conversion to a mech flat tappet so ignore all the lifter size stuff
what matters is what was said on my post 79 about the torque advantages of an inverse flank roller cam- no one else takes the time to final grind and spark out with a 5" wheel
several other "inverse" series are barley inverse - as much as can be obtained with the standard 18 " wheel which is not much
Mikes program takes all this into account
cheeers
Maybe a little bit more explanation on this.

Click to expand...

Right...it's an inverse radius on the lobe. It works, but. AFAIK, the only cam grinder doing it correctly is Mike Jones. Others offer an inverse radius, but if you don't use some incredibly small diameter grinding wheel on the cam grinder it doesn't really work that well.

I've said before back in the mid 1980's I tried an inverse radius lobe from Crane. That thing was a spring killer.

I will say that maybe today, with better springs those lobes may have worked better. Valve spring technology has jumped up by several orders of magnitude since then.