ZDriver96

Basically what makes the cop r lifters better than OEM lifters.

OEM is rated to take up to 155 ft lbs of seat pressure.

Some one give me a summary

Kevin97ss

I dont know any specs like seat pressure, but I do know that there not gonna "pump up" like a factory lifter can at high rpm.

Mikey97Z

I was told that one main difference is that the plunger has less travel so it's sortof like a hydraulic lifter that acts more like a solid lifter. And for some reason that makes them noisier.

Kevin97ss

There not louder than my stockers

a_z28_vance

Have you prices OEM lifters?? I paid $20 more for the "R" lifters(GP) than I did for stock replacements from Advance Auto parts.

ZDriver96

so if they act like more like a solid roller shouldnt you get more power?
The OEM lifters cost 169 dollars
I came across a new set of Comp R's for 165 dollars
Normally i see the comp r's for 250 bucks or so.
What do you consider high rpms?
Most of use with cams rev 6300-6500.

I thought it'd be interesting to bring up this subject since no one ever talks about lifters or if there is performance value out of lifters... not just integrity value.

Dan K

There's some on my credit card right now.
Combination motorsports, in stock and like $219 to my door.

WheelmanZ28

The spring tension is slightly higher, lessening the possibility of valve float and vacuum loss at higher RPM. I switched them out from my stock Lfiters, which were worn, and they made a noticeable difference.