What pump?

What block?

What lifters and is the block bushed? What is the lifter to bore clearance? Any changes made to block to assist in oil return?

All that said, I often start with .045, and typically will reduce from there. I would not go much below .030 usually though. The beauty is, its a very fast and easy change to make, and then check it. Has the engine been down the track yet? Need to see how it acts up at speed, RPM and under motion.

Pull the valley center plate, and prime with a drill. Will probably see everything you need to know, along with same on rockers.

Last edited by CompWedgeEngines; 04/08/18 12:16 PM.

RIP Monte Smith

Your work is a reflection of yourself, autograph it with quality.

WD for Diamond Pistons,Sidewinder cylinder heads, Wiseco, K1 rods and cranks,BAM lifters, Morel lifters, Molnar Technologies, Harland Sharp, Pro Gear, Cometic, King Engine Bearings and many others.