Comp "r" yay or nay
TECH Enthusiast
Joined: Mar 2004
Posts: 647
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From: Australia
comp-R lifters here too. Seem to work OK. 212-220 high lift cam and crane 1.8RRs. The engine is a little noisier due to the lift and acceleration rate of the valves, but otherwise it runs sweet. No high RPM valve float at all.
918s + crane 1.8RRs are holding up well.
918s + crane 1.8RRs are holding up well.
Well from the comments that have been made in here and a few other forums i think im gonna go ahead and use them.It makes sense that if you have the lifter preloaded correctly there should be no contact with the plunger to the retainer, that holds the plunger in the lifter, when there is no load on the plunger sorry if that sounds wierd!!Therefor there should be no stress on that clip to break,Thanks for your guys opinions and suggestions 
I have run these for 30k miles in my LT1 car with 1.6RR Comp Magnum rockers, Comp pushrods, Comp springs, and the Comp Cam 306. I have never had any issues with them. As a matter of fact, those are the only lifters that my engine builder uses.
So I bought a set for my LS1 car last year and I was planning on putting them in with my Comp Cam this month. But now after reading some of this, I am not so sure. With the talk of Aluminum Block expansion rates vs cast iron, and quality control, I'm pretty weary.
How much are the Morel's and who sells them?
Jeff
So I bought a set for my LS1 car last year and I was planning on putting them in with my Comp Cam this month. But now after reading some of this, I am not so sure. With the talk of Aluminum Block expansion rates vs cast iron, and quality control, I'm pretty weary.
How much are the Morel's and who sells them?
Jeff
Last edited by FRDnemesis; Jan 11, 2006 at 09:03 AM.
Originally Posted by FRDnemesis
I have run these for 30k miles in my LT1 car with 1.6RR Comp Magnum rockers, Comp pushrods, Comp springs, and the Comp Cam 306. I have never had any issues with them. As a matter of fact, those are the only lifters that my engine builder uses.
So I bought a set for my LS1 car last year and I was planning on putting them in with my Comp Cam this month. But now after reading some of this, I am not so sure. With the talk of Aluminum Block expansion rates vs cast iron, and quality control, I'm pretty weary.
How much are the Morel's and who sells them?
Jeff
So I bought a set for my LS1 car last year and I was planning on putting them in with my Comp Cam this month. But now after reading some of this, I am not so sure. With the talk of Aluminum Block expansion rates vs cast iron, and quality control, I'm pretty weary.
How much are the Morel's and who sells them?
Jeff
I'm with ya on this issue. I don't want to be a band wagon jumper but I will not take a chance like that on a set of lifters I paid 150.00 for.
I have a NIB set of comp "R"s 850-16's I got off of a guy on here. They might have to hit the market.
Originally Posted by SAM98WS6
You know..I used these parts without issue...but if I was doing it again I would use something else and not risk it...obviously making these exact valvetrain components work properly is not easy.
I would use Morels and jesel if I had the money and wouldnt use stock if they were the last parts on earth.
I would use Morels and jesel if I had the money and wouldnt use stock if they were the last parts on earth.
Thats funny because if you post a new thread saying who uses stock lifters and what kind of results have you had I guantree the feedback is more positive then the feedback in this thread.
Stock lifters 99% of the time work great. There are 100's of combo's using bigger cams like the T rex/G5X3/ G5X4/G5X2/Juggernaut/ etc that use stock lifters with no problem.
I myself have done over 25 H/C installs this past year alone with not 1 single lifter problem. But your right stock lifters suck.
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I don't see why most couldn't just use the COMP stock replacement lifters and not have to sweat the R's. I wouldn't touch the R's, with all the horror stories and extra $$. I don't see how it's worth it.
Yes, the point of all of this seems to be that the much more pain in the *** of the R lifters (rediculous pre-load range of only .002-.004), even without suggesting the possibility of a faulty piece, is just not necessary as the stock lifters are putting up with some big rpm and some very agressive hydraulic lobes.
TECH Fanatic
Joined: Jan 2002
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From: harrisburg, pa
Originally Posted by JZ'sTA
Thats funny because if you post a new thread saying who uses stock lifters and what kind of results have you had I guantree the feedback is more positive then the feedback in this thread.
Stock lifters 99% of the time work great. There are 100's of combo's using bigger cams like the T rex/G5X3/ G5X4/G5X2/Juggernaut/ etc that use stock lifters with no problem.
I myself have done over 25 H/C installs this past year alone with not 1 single lifter problem. But your right stock lifters suck.
Stock lifters 99% of the time work great. There are 100's of combo's using bigger cams like the T rex/G5X3/ G5X4/G5X2/Juggernaut/ etc that use stock lifters with no problem.
I myself have done over 25 H/C installs this past year alone with not 1 single lifter problem. But your right stock lifters suck.
Id use stock lifters if I was doing a cheap rebuild and my cam wasnt too wild.