[Anthony]

I was considering a hydraulic roller, but kept on reading that the engines could never rev to or much beyond 6000 rpms due to reasons as listed above, heavy valve train, high spring pressures, bleed down of lifters. I often thought whether it would be safe to adjust the valvetrain to collapse the lifter to about .020" from bottoming out, so as to limit the distance the lifter can collapse. I know back in the '60's, Royal Pontiac used to do this to the GTO's, adjust the valva train to collapse the lifter near bottoming it out, to get higher rpm's out of a hydraulic lifter engine. BUt with a hydraulic roller, with greater lifts, faster ramps, higher spring pressures, I don't know if it would be safe to do so. I'll let someone else experiment first.

The roller gives you an advantage over flat cams at higher rpm's, so if you are limited to rpms by a hydraulic roller, it is not as beneficial as if you went to a solid roller, that you can take to higher rpms and make more top end power, where you need to be if you want to make big hp.

I just went with a solid roller, at about .660" lift. With a mechanical flat cam, you have to adjust the lifters anyways, so it's no different other than a bigger expense up front. It takes about an hour or so to do. No biggey.