JPR

Dos anyone have concrete proof that the Comp "R" lifters make more power over the Crane replacement lifters?

TIA!
Joe.

MastaAce98

iTrader: (1)

and what exactly would make one lifter make more power than another lifter? The only POSSIBLE thing I could see is perhaps weight, but even then the difference would be so small it wouldn't matter.

BurnOut

iTrader: (1)

What could make a difference in power is the ability of the lifter to avoid pumping up or bleeding down (if it pumps up, the valve can hang open a little bit; if it bleeds down, the valve won't see full lift).

JPR

Exactly! Thats my question, thanks Burn Out..

Any other input here?

TIA
Joe.

horist

I don't have any proof that the comp Rs work better... but one thing I can say is that the Comp Rs appear to be reworked more than the Cranes...

I have a set of stockers, Cranes and Comp Rs (Comp Rs in car now)... the stockers and Cranes looked identical, whereas the CompRs had different clips in them, and a different body..

But dunno which is better

Pro Stock John

iTrader: (34)

S/E guys run bushed stock lifters which have less travel in them, like .025 I heard.

I have been running Comp R lifters and have no supporting evidence that they work but my dyno sheets have typically shown no valve float or other weird problems.

JPR

Thanks PSJ, One of the reasons why I was asking is because the Comp "R" lifters are actually a little heavier than the stock replacements so I was hoping that there was something else to them that was preferd over the Cranes. I can understand if your running high spring pressures 120 seat + that there less likely to bleed down under high RPM's I just thought that someone had some proof positive that they were worth some more power.
Thanks
Joe.