Spring pressure for hydraulic roller cam?

If you’re considering one of those cams, you should see what they recommend for spring load, and see how close what you have is, compared to their recommendation.

They will certainly work up to some rpm point.
Then the question becomes do the springs have enough load to allow the motor to achieve a high enough rpm to find the limit of the lifters?
Or, high enough to where you’ve reached your own predetermined limit.