Lifter plunger in the 59 deg toilet

it can be made better by going to a solid roller. No hydro preload BS, no incompatible ramp rates, just a little sewing machine noise during normal operation and some routine quarterly valve adjustments. you can keep your hydro roller cam too.
"...It is possible to run ..mechanical roller lifters on a hydraulic-roller cam. Putting solid lifters on a hydraulic cam will gain about 500 rpm on the top-end over hydraulic lifters due to the solid lifters' improved valvetrain control—unlike the hydraulic, solids have no bleed-down/pump-up problems. Some hydraulic-roller cams—particularly smaller grinds with 220-240 degrees duration at 0.050—are quick off the seat, but this tends to cause more instability on top. Using solid lifters, even with the existing hydraulic springs, enhances top-end stability and fights the onset of valve float.


Successfully running solid lifters on a hydraulic profile requires some amount of valve lash (a solid lifter cannot run at zero lash or be preloaded). This lash effectively reduces cam duration, especially at low lift off the valve seat (see table below). With less duration, peak torque and power occur at lower rpm than would normally be the case for the given combo when running a hydraulic lifter. In other words, the cam acts smaller."

DURATION VS. LASH
This table shows the change in effective duration at the valve from different valve-lash settings on a Comp Cams Xtreme Energy No. 3315 hydraulic-roller lobe profile. It assumes a 1.5:1 rocker arm ratio.
VALVE DURATION AT LASH
LIFT 0.004" 0.008" 0.012"
0.006" 279.7 273.6 268.6
0.020" 262.5 258.9 255.6
0.050" 240.9 238.6 236.5
0.200" 183.2 181.9 180.6

How-to Run Solid Lifters on a Hydraulic Cam).