Option B-
Solid flat tappet cam, edm lifters, suitable springs, pushrods. <<< This is the solution
This will require breaking in the cam with inner springs removed, and a high quality break in oil.
The springs that come with the rpm heads aren’t suitable for anything but the mildest of solid flat tappet cams. Ditch the springs for anything more than an old hyd flat grind like a MP .484"
There is an ever growing list of threads, videos, etc, of people who have had less than stellar results with retrofit hyd cam conversions....... enough so they really aren’t something I can confidently recommend any longer........ unless you’re willing to get the lifter bores bushed. Agreed again, haven't built a hyd roller combo in awhile unless it was an LS or G3. Problem isn't really just the lifter bores it is just shitty aftermarket hydraulic rollers being built--maybe counterfeit?
If you’re going to use/using a block that originally came with hyd roller lifters....... you have a better chance of success imo.Agreed see above LS/G3 ref. [/QUOTE]
As usual Dwayne, spot on. I find myself going back to the venerable solid flat tappet in cases where budget and reliability are a priority. J.Rob
