We just got 2 custom ground Comp billet hyd. roller cams, for a marine application, Pro-Charged 548's, the magnumn hyd. roller lifters, that do not seem to pump up, and will pull 7000 rpm, with the right combo of pieces, but, comp said, without even asking, they brought it up, and, if you ever wanted, you could even run solid rollers on these cams, and it would TOTALY change the dynamics, the cam would actualy be much more radical, as in aggressive. I know one other guy, that runs solid rollers on a hyd roller, and, it works, but, I wouldn;t do it,
Frank
Advanced Performance
www.get-ap.com