destroyerSS

iTrader: (2)

Ok i'm getting ready to install my new heads,LSX, H/S roller rockers, plus more and my ? is should i shim my H/S RR's for these comp r lifters or sell them and get a adjustable RR's. BTW my new heads have Comp 977 springs. Please help Thanks Shawn

felton316

It depends if you have too much preload, then yes you will need shims. I'm running Comp R's and milled heads, and I did not need shims.

Squintz Palladoris

iTrader: (1)

I have seen this debated many times on here before. The guys who shim them are hit n miss but the guys with adjustables have no problems whatsoever. These lifters are designed to work with an adjustable rocker.

I am running comp R lifters with crane 1.7 adjustables. They were easy to adjust and since its a hydraulic there is no need to adjust them again.

I got mine from VINCI they call them "Accelerated lift" and say they are a 1.79 ratio. At full lift they are 1.7 Here is a link http://www.vincihighperformance.com/
Give them a call they are great to do bussiness with.

Brad

Nasty N8

iTrader: (33)

There is absolutly no need for adjustables you just need to get the preload correct for the Comp R`s. They are still hydrolic and require 1/4 to 3/4 turn preload.

Nate

destroyerSS

iTrader: (2)

Nate it sounds like you have done a few of these set up's! Where did you get shims from and how do you set such a slight preload with the shims. Any help is great.

Z06PSI

iTrader: (33)

Hey Nate or anybody else. I have a question. Are the Comp R's the only ones who need to be preloaded.. the reason I ask is that I found some other roller lifters and was wondering if they are going to need to be preloaded or just tightened to 19 ft lbs..????????

Z06PSI

iTrader: (33)

ttt Anybody

Unaffliated Racing

iTrader: (15)

Nate your information is incorrect. The R series lifter requires .002"-.004" of preload. These guidlines are here for a reason...use them. Comp also now offers pushrods for the LS-1's in .025" increments for these problems

7794-16 5/16" 7.325"
7795-16 5/16" 7.375"
7796-16 5/16" 7.425"
7797-16 5/16" 7.475"