yellow rose said

It's an issue of TIME. We need to account for time. Like the analogy above about the rough road, or it's the same with a dirt bike...faster over the rough stuff can make it smoother. Of course, if you screw up you get some quality sheet time at your local hospital.

That said, at lower RPM's the roller tends to skid rather than roll. Rockers suffer the same issue. As the RPM goes up, everything happens quicker and it tends to smooth thing out...until you get spring surge, valve float or seat bounce.

Also, guys have a hard on to keep oil pressure and flow at idle to damn near nothing. While you may save a few HP, that lack of pressure and flow is a killer on splash fed lifters. Even SFT lifters. I never let an engine of mine idle under 1000 and 1200 is better. Guys also like to brag their stuff with a 270 @ .050 cam will idle at 600 RPM in gear. What they don't get is they are just killing parts.

Splash oiling is ok if you don't monkey see-monkey do like other guys with different requirements than a Chrysler.

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yellow rose said

New, those wheels were .750 diameter

I've never been a fan of using a lifter in a Chrysler with a wheel smaller than .810 diameter.
Even with the same lift as a Chevy small block, the base circl is bigger on a Chrysler cam. So...the wheel has to turn more RPM for the same RPM of crank speed than a Chevy. Did that make sense?
The further around the entire lobe, the more surface feet per minute the roller has to cover. That small diameter wheel has two disadvantages. The first is roller speed is higher than with a bigger wheel. At certain speeds, you can develop a harmonic just like a tuning fork. When I see fretting on the wheel, that's the first thing I think of. You were probably at an RPM for periods of time long enough to induce the harmonic that just eats up the wheel

The second issue with the smaller wheel is you have a smaller axle. The bigger wheel allows a bigger axle. Bigger is always better in high load applications.

That's my .02 on what I'm seeing.
BTW, what I just posted was told to me by Wayne Jesel. If it wasn't for him, I'd have quit drag racing long before I did.

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