[Jack Gifford]

Originally Posted by Armadillo

... From what I can piece together, you should not go over 6000 rpm on them...

Pdude! Listen up! Quit spinning that thing to 6,800!

[PONTIAC DUDE]

Originally Posted by pontiac jack

Pdude! Listen up! Quit spinning that thing to 6,800!

Bwahahahahahahaha. Don't want to........ but I just give it what it wants. Yes I am using Comp Cams hydraulic roller lifters. Beehive springs. H.S. rockers

I shift it at 6500 with the CV-1's.

I am expecting to go faster with the re-worked intake so I'm pulling the 4.10's out and putting in my old 3.90's.

I don't know off hand but I think I have over 50 or so hyd roller engines out there, just in Pontiacs. I do know there are 14 IA 2 hyd roller combos floating around. From 525 to 625hp.

Back when I first starting messing with them in my 535 I was buzzing the ole engine 7000 and running 10.50's. It is posted up here somewhere back about 3 years ago. Slowly brought the rpm's down to 6000 and ran the same number. But had stock E-heads. Took it to the dyno and the curve was flat from 5600 to 6200.

Same deal now. The stock e-heads flattened out at 6200. The higher flowing CV-1's it keeps pulling past 6500.
But like anything else i will play with it till i find that RPM sweet spot. Be it 6000 or 7000.

Will it break. Maybe. But not because of the combo. Sh*t happens. But like I tell my customers.

The only way to not tear anything up is stay home and watch it on ESPN.