[Cliff R]

The tight lash solid roller lifter on the HR camshaft works pretty well for us. I have two engines out of our shop that use this set up with zero issues anyplace. I have several customers running engines prepared here with the same deal, zero issues anyplace.

We have settled on .005" lash, dead cold. Working fantastic and these engines are very quiet. Something I'm not used to, as every single engine I've every owned that had a hydraulic cam in it, had one or two "clickers" someplace.

What we are essentially doing here is using a true "anti-pump up" lifter. No hydraulics to come into play at high rpms, and the lifters are much lighter than their hydrauilic roller counterparts.

We use the Crower HIPPO lifters with the positive oiling feature. No block restrictors are required, they are self metering.

I would add here that it is difficult, if not near impossible to get oil up to all the rockers on the engine stand (unless you want to smoke your 1/2 drill) by turning the crank and running the pump with a drill at the same time.

In use, the Crower lifters do an EXCELLENT job of oiling the top end of the engine, while keeping plenty of oil in the bottom end where it counts.

I can't remember the springs Dave set up my heads with, but they are the same ones he uses for HR camshafts. I'll ask him about the pressures again, I was thinking he said they were up near 380-400 lbs open.

In any case, the biggest difference I notice between this engine and my last one that used HR lifters, is that this one races right past 5800rpm's so quick you can't move the shifter fast enough. The old engine was pretty much done at 5800rpm's, either by being a smaller cam with smaller runner heads, or loosing some lift/duration due to the hydraulic lifters, not sure?.....Cliff