lifters
lifters hey guys what lifters do you guys recomend that i could use with non adjustable rockers. I bought the pro magnums from comp, because of their better desing at higher rpms but it turns out that you gotta use them with adjustable rockers. So what lifters would you guys recomend, that could take a beating, and be good anywhere in the rpm range, from iddle all the way up to 6.5 k rpm
Originally Posted by zamboxl
hey guys what lifters do you guys recomend that i could use with non adjustable rockers. I bought the pro magnums from comp, because of their better desing at higher rpms but it turns out that you gotta use them with adjustable rockers. So what lifters would you guys recomend, that could take a beating, and be good anywhere in the rpm range, from iddle all the way up to 6.5 k rpm
Non - adjustable Rockers , use the normal comp replacement lifter
Adjustable rockers , use the Comp "R" Lifters
Originally Posted by 1999T/A
Non - adjustable Rockers , use the normal comp replacement lifter
Adjustable rockers , use the Comp "R" Lifters
Adjustable rockers , use the Comp "R" Lifters
edit::: actually does anybody know if part number 875-16 is the ones that need adjustable rockers? they are the pro magnums but i don't see any r on the box and i thought it was only the R's that needed adjustable rockers
Last edited by zamboxl; Dec 16, 2004 at 03:21 PM.
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Originally Posted by 94form2000z
My new stock lifters have been taking a beating just fine shifting at 6600 at one point.
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Originally Posted by 94form2000z
Yes like stock as in bought new GM lifters. Never read about the bulletin and actually have rarely heard of any issues with stock lifters either.
I had a lifter fail , and another one on the way out when I took the motor apart . The one lifter exploded and I found chunks of it in the oil pan along with a TON of metal shavings and lifter needle bearings from the cam followers . I would NOT put GM lifters in my performance engine, but thats just me . ..
Originally Posted by 1999T/A
I had a lifter fail , and another one on the way out when I took the motor apart . The one lifter exploded and I found chunks of it in the oil pan along with a TON of metal shavings and lifter needle bearings from the cam followers . I would NOT put GM lifters in my performance engine, but thats just me . ..
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
Stock lifters are good till 6800 rpm with mild cams or .570 lifts or less. The proof is in the LS6.
Now when you near .600 lifts that is where Comp "R" come into play.
Stock rockers are some of the best if one an keep the bearings from braking apart. NASTY performance has a kit or does that with a Harland Sharp refurbishing kit (C-clips and new trunions. ~$260
Now when you near .600 lifts that is where Comp "R" come into play.
Stock rockers are some of the best if one an keep the bearings from braking apart. NASTY performance has a kit or does that with a Harland Sharp refurbishing kit (C-clips and new trunions. ~$260
Originally Posted by PREDATOR-Z
Stock lifters are good till 6800 rpm with mild cams or .570 lifts or less. The proof is in the LS6.
Now when you near .600 lifts that is where Comp "R" come into play.
Stock rockers are some of the best if one an keep the bearings from braking apart. NASTY performance has a kit or does that with a Harland Sharp refurbishing kit (C-clips and new trunions. ~$260
Now when you near .600 lifts that is where Comp "R" come into play.
Stock rockers are some of the best if one an keep the bearings from braking apart. NASTY performance has a kit or does that with a Harland Sharp refurbishing kit (C-clips and new trunions. ~$260
Staging Lane
Joined: Jun 2004
Posts: 90
Likes: 0
From: Conway, AR
I just got my lifters in the mail yesterday from LS1speed. I ordered the Comp Hi-Energy R lifters. As far as that I don't know? I dont have adjustable rockers and I was reccomended to get the R's.
Dane
Adjustable rockers , use the Comp "R" Lifters
Dane
Originally Posted by Juiced346
I just got my lifters in the mail yesterday from LS1speed. I ordered the Comp Hi-Energy R lifters. As far as that I don't know? I dont have adjustable rockers and I was reccomended to get the R's.
Dane
Dane
The lifter preload is different for the Comp Rs , you will now either have to get adjustable rockers or a custom length pushrod for correct preload . Of course the pushrods are cheaper , but I would rather do it right with the adjustable rockers . My .00000000000002 cents . . .
Staging Lane
Joined: Jun 2004
Posts: 90
Likes: 0
From: Conway, AR
The lifter preload is different for the Comp Rs , you will now either have to get adjustable rockers or a custom length pushrod for correct preload . Of course the pushrods are cheaper , but I would rather do it right with the adjustable rockers . My .00000000000002 cents . . .
Dane
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
With non adjustable rockers there is 2 ways to adjust lifter preload.
1- Custom length push rods (which is quasi impossible as every valve might require a different legth to achieve recomended lifter preload)
2- Shimming the rocker stands and that requires a shim kit which has all kinds of different size shims
Comp "R" lifters are recommended to use adjustable rockers to get the right amount of preload.
Crane, Comp Cam 850-16 and many "replacement" lifters meet or exceed OEM specifications.
I have Comp 850-16 and i spin to 6600 on 200 shot dry with no ill effects yet on my .581 XER lobes
1- Custom length push rods (which is quasi impossible as every valve might require a different legth to achieve recomended lifter preload)
2- Shimming the rocker stands and that requires a shim kit which has all kinds of different size shims
Comp "R" lifters are recommended to use adjustable rockers to get the right amount of preload.
Crane, Comp Cam 850-16 and many "replacement" lifters meet or exceed OEM specifications.
I have Comp 850-16 and i spin to 6600 on 200 shot dry with no ill effects yet on my .581 XER lobes