Spring Pressures. Solid roller lifter on a hyd roller cam.

dart19666 said

I agree since I design these profiles for a living These pressure above would beat the crap out of most and all solid roller profiles above 5,500rpm. The roller would simply just lose contact with the cam over the nose and slam down on the base circle. I will work "Run" but for how long. The top two cars at this years rocky mountain race week had Crower cam, lifters, rockers and spring set up from me. Both running well over the minimums I listed above.

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It would skip across the lobe ...on an aggressive solid roller...not a hyd profile though.
I run a Doug Herbert 575 [email protected] 108
K motion K800 springs 225/485 , morel street .750 wheel roller lifters stay put. Maybe at 7200+ they wouldn't....but I dont run it there.
Imo 675 is a TON. But if you're talking about .640-.720 lift... I agree with that.
'Enough' is what you want, 'too much' is just a drag.
Again, it depends on the grind and its wheel.
Crower likes a lot. Got it. I'll run whatever the cam grinder tells me, so if I ever run a crower... I will follow your recommendation and expect you to have the parts to make that happen. :)