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

I am an engineer for Crower and design cam masters for a living. The ramp rates between a Hydraulic and a solid are completely different. Solid roller masters are very slow from 0.005" to about 0.020" of cam lift, this is to take up the lash, then exponential ramp up up from 0.020" to max lift. A hydraulic roller master ramp in much faster right at 0.005" and steadily ramp up to max lift. Also most solid rollers need ALOT more spring pressures than a Hydraulic. All our solid rollers need Minimum of 250# on the seat and 650# over the nose for a street solid roller. The pressures that you have are perfect for a Hydraulic roller. Now I have seen people do this before and make it work by tightening up the lash to say 0.008" - 0.010" but I would ask the cam manufacture what the ramp velocity is and adjust from there. The reason for the tighten up of the lash is because the ramp are ramping much sooner than on a solid and this will keep it quieter. Now for the final question "Will it make more or less power" I can say that we have tested this hundreds of times on our company dyno and the power is with in 10-15hp with the hydraulic on a hydraulic making more power 95% of the time over a solid on a hydraulic, once again this all depends on the ramp rates. If you have any questions please just ask. I hope this helps.