Roller cam and FE engine

[Bunkie314]

I'm running a crane custom grind solid (305 dur, .665" lift) with lunati solid roller lifters, CM push rods, sharp roller rockers, billet shafts, new supports and end supports. Broke the Cam in on Crane's recommended running spring and its going great (850 miles and its just starting to run like a swiss watch.

Some areas need to be looked at when you get into the roller cams. Push rod clearances is likely the most overlooked and if you have any lift over .550" there can be tight spots at the intake, mind you not always. I seen one on here that the upper pushrod pocket broke off due to clearance to the intake. Examine all clearances on every lobe, not just a few.

Another area that gets overlooked is the rockerarm geometery. Binding can happen here as well and requires work to correct.

I have to add this last comment since every body is adjusting their flat tappets and rollers all the time, well there is a problem. Maybe twice a year or if you hear noise. I have yet to readjust since I put mine together, I have checked them once after 500 miles and all I got out of it was a persistant valve cover leak on one side.

If you're adjusting them constantly two things come to mind:
1. THey were never adjust properly to begin with.
2. You have some part that is wearing out or bent and needs to be replaced. Evaluate the entire system for worn parts or buy some good quality equipment and just replace them.

Just my two cents worth.