Comp "R" Lifters
10-17-2005, 08:25 AM
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Please Help Comp "R" Lifters ok i have comp r lifters in the motor. have checked p/v clearance, had the rockers off, checked clearance on evrything. But when first started the engine makes kinda of a hollow popping sound. but when u give it gas it goes away. also after u drive it for a while it goes away. until u let it set at an idle for a while then it will do it again everyonce in awhile? everyone ive talked to said its just that they bleed off so much oil they dont pump up at idle and that we r hearing the lifters? anyone else have any info? just wanting to check and make sure that the consensus is right b4 i go pushing the bottle on it. has a decent sized cam. about as big as the magic stick but not quite
Last edited by 10secopcar; 10-17-2005 at 09:44 AM.
10-17-2005, 09:22 PM
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My comp Rs are dead quiet. .010" preload cold. Not sure how to help you.
242/250 .598/.598 109 cam
how do u measure the preload? torqued them to 24ft./lbs. stock length pushrods. mine tick really bad and as i said b4 make a hollow popping noise when u first start. then as it gets heated, the noise goes away? so can this b my lifters?
242/250 .598/.598 109 cam
how do u measure the preload? torqued them to 24ft./lbs. stock length pushrods. mine tick really bad and as i said b4 make a hollow popping noise when u first start. then as it gets heated, the noise goes away? so can this b my lifters?
10-18-2005, 07:13 AM
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Dial indicator on the rocker tip...snug them up...turn the nut about 1/5 turn for .008-.010". That is the only and proper way to adjust them cold. Not sure what the preload is warm.
Yours are adjusted incorrectly. You must use adjustable rockers. Call Comp Cams if you need more info.
Yours are adjusted incorrectly. You must use adjustable rockers. Call Comp Cams if you need more info.
10-18-2005, 08:27 AM
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not doubting what u r saying but there are several people around here using comp r with stock rockers. so this is the reason they tick then? because veryone around here there cars tick like crazy. what kinda of adjustable rockers would you suggest?
10-18-2005, 09:10 AM
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I am using stock rockers but not a stock length push rod. With a stock push rod, it was .020 too short. See if you can spin your pushrods with the valve all the way closed.
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10-19-2005, 06:35 AM
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I use Comp Pro Magnum 1.7 Roller Rockers but any adjustable will do. You will have to clearance the valvecovers.
You guys are making two big mistakes...you are building more horsepower and using lifters that the manufacturer requires adjustable rockers and then on top of that you are using the JUNK stock rockers. Wait until one breaks and dumps the need bearings through your motor like it did DOZENS and DOZENS of people on this board alone...but I realize..until that happens...you are ok.
You guys are making two big mistakes...you are building more horsepower and using lifters that the manufacturer requires adjustable rockers and then on top of that you are using the JUNK stock rockers. Wait until one breaks and dumps the need bearings through your motor like it did DOZENS and DOZENS of people on this board alone...but I realize..until that happens...you are ok.
10-19-2005, 06:50 AM
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Originally Posted by SAM98WS6
I use Comp Pro Magnum 1.7 Roller Rockers but any adjustable will do. You will have to clearance the valvecovers.
You guys are making two big mistakes...you are building more horsepower and using lifters that the manufacturer requires adjustable rockers and then on top of that you are using the JUNK stock rockers. Wait until one breaks and dumps the need bearings through your motor like it did DOZENS and DOZENS of people on this board alone...but I realize..until that happens...you are ok.
You guys are making two big mistakes...you are building more horsepower and using lifters that the manufacturer requires adjustable rockers and then on top of that you are using the JUNK stock rockers. Wait until one breaks and dumps the need bearings through your motor like it did DOZENS and DOZENS of people on this board alone...but I realize..until that happens...you are ok.
10-19-2005, 06:55 AM
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Originally Posted by 2001 Pewter WS6
They are not requiring special rockers, just the proper preload which can be done by shimming the rockers or a specific length pushrod. Stockers have proven to be more than reliable. Sure there have been a few failures but it is not that common.
we've done a fair share at the shop with no issues at all. and theres actully less stress on the rockers being less pressure on them . the sdjustable rockers are nice but the just make it a little easier to get the preload right on the money
10-19-2005, 08:11 AM
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the motor was originally built by MTI. the rockers were already shimmed. we are just putting a diff cam in it. so in theory and i know its only theory but if you put it back together the way they say then u should be ok no? but for now just trying to get it running. i just had shoulder surgery so for now it just needs to get me back and forth to therapy. and wow what a diff a good MAF will make. mine was junk and the car felt like a dog. put a new maf on it and holy crap!!!!!
10-19-2005, 08:19 AM
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LOL...how many broken stock rockers makes it common...a dozen?...3 dozen...hundred?..come on...be serious...
Comp literature says adjustable rockers...and thats what the tech said when I talked to him.
Comp literature says adjustable rockers...and thats what the tech said when I talked to him.
10-19-2005, 08:27 AM
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Im not arguing with you...just stating whats recommended...
http://www.compcams.com/Technical/Cu...ML/279-282.asp
http://www.compcams.com/Technical/Cu...ML/279-282.asp
10-19-2005, 11:49 PM
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Originally Posted by 10secopcar
the motor was originally built by MTI. the rockers were already shimmed. we are just putting a diff cam in it. so in theory and i know its only theory but if you put it back together the way they say then u should be ok no?
fwiw, my friend has probably the biggest hyd roller cam anyone is running on an ls1 and he used comp r's with stock rockers and has no problems.
10-20-2005, 01:14 AM
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Originally Posted by 2001 Pewter WS6
They are not requiring special rockers, just the proper preload which can be done by shimming the rockers or a specific length pushrod. Stockers have proven to be more than reliable. Sure there have been a few failures but it is not that common.
10-20-2005, 02:23 AM
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ok well like i said not saying i dont want adjustables. but r they like the old adjustables that u have to adjust once or twice a month? or is it a once u set it type of deal it is set? any info on this would b appreciated.
10-20-2005, 09:48 AM
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sam how long have u had your adjustables? and what brand were they? and r there any good rockers out there for a decent price. im not made of money but if i need to start savin i guess i can.