408 hyd roller, too much spring pressure?

They are grossly overrated & they don't like rpm? Another brain surgeon at work.
Speed Talk website, post started on Aug 3.
BH/Conical springs used:
- 0.900" valve lift using dual conicals
- BB Chev Twin Turbo 2.35: int valve, 0.750"lift, 7200 rpm, 135 lb on the seat.
- roller cammed engine, spinning to 8000 rpm
- BB Chev, 2.30"valve 135 ln on the seat, 750 lift, 27 psi of boost, 1800 whp, 7400 rpm.

I do not know how to link the post. If you know how, the date of the post on ST was Aug 3, this year.

There WAS a bad batch of Comp Cams BH springs about 15-17 yrs ago, which Comp acknowledged.