IDK.
but IMO,
A roller cam just moves the pressure point from a short narrow line on the bottom of the flat tappet to an even shorter narrower line, on perhaps two atta time of the the little tiny needle bearings, and the axle. So now the needles/axle see all the pain.
IMO tho it is easier to replace lifters when the needles give up, than to swap out a cam when the lobes fall off.
The part I have trouble with is lifter maintenance. Until you have inspected your roller lifters several times, you cannot know how fast the needles are wearing out in your particular combo. If the needles shatter on you,do the parts stay together, or travel throughout the engine? And if the parts do travel, what kind of damage are they gonna do?
I'm not into pulling the intake to have a look-see.Especially not several times.
So for at least the foreseeable future, I'm sticking with what I know works, namely, FTH and ZDDP.
I run enough spring pressure to turn 7200 reliably, with a Hughes HE3038AL and 1.6 arms. This is 276/286/110 and .549/.571 lift,so admittedly not too serious.
At one time,I was interested in a bushed-roller lifter with a large diameter axle. But the Hughes has been in there now since 2004 or so, and still going strong.
