02b4ccamaro

iTrader: (3)

is any one running these lifters and if so what do you think? im on my second set of ls7 lifters and they suck, they work for about a 1000 miles and then start ticking.

SOMbitch

iTrader: (8)

There is nothing wrong with the lifters it how you have them set up. 30k here and still quiet on XFI/X-ER lobes. The comps have a much tighter "sweet spot" for preload and are even less forgiving. IIRC they want .010 preload. An LS7 will work well in the .050-.080 range.....

99blancoSS

iTrader: (115)

^^^ All depends on the rpms he is driving the engine at as well. If your setup properly and still killing them then its time for a true upgrade.

Its the material used in the construction of the lifter that makes the difference.
A true upgrade would be to Morel lifters not a Comp r.

The price difference is huge: Comp R's are like $215 a set and I sell the Morels for $525 a set. (* best price you will find on them). But if you go through another set of lifters and have to replace them you've just spent more than if you went with Morels in the first place.

I would go straight to the Morel and stop wasting money.
http://estore.websitepros.com/212053...tegory=Lifters

quick346

iTrader: (4)

If you are haveing problems with the ls7's with the 230 cam in youre sig something is wrong. I run the ls7's on a 243/251 lsl lobe'd cam with zero problems.

I have ran the same set for 3 years on the afr 8019 springs set at .040 from bind.

try to run a little more preload. go up around .100 and see if it helps. i think they have like .180 of plunger travel . i run mine around .110 and have zero ticks for the most part.

When i had adj rockers i kept preloading more till the noise went away and thats what it took. some will say its too much but it worked for me

02b4ccamaro

iTrader: (3)

the preload is .080 on the money. so i dont see what im doing wrong, i never over rev the motor, it has never been over 6500rpms. heres a dumb question im running the ls2 lifter trays is there a certain way they go in because they look nothing like the stock ones

99blancoSS

iTrader: (115)

how often is it at 6500 rpms?

quick346

iTrader: (4)

Even when my gto was stock with less than 8k miles on it at any time it would drop a lifter or 2 and then go away. I even brought it back to the stealership and he said " it is the nature of a high hp engine"

I really wanted to respond with a punch to his face but didn't i was like sweet i paid 25k to listen to a junkyard moter.

one thing i did do that may have helped that i forgot about is i run the slp oil pump and it has insane oil pressure over 5k rpms. it pegs my mech gage at 120psi over 5k rpms.

but i would first try more preload you wont hurt anything like i said the plunger has .180 of travel and i think the spec on preload is .080 -.120 from gm i think but could be wrong but more preload fixed mine.

also the more aggressive ramp you have the more likely to have valvetrain noise

SOMbitch

iTrader: (8)

IDK what to say........Set up properly you should have no probs on that cam..... Are the lifters coming apart or just getting noisy. Are the cam lobes OK? Post a sound clip if you can....

02b4ccamaro

iTrader: (3)

it only saw 6500rpm for 5 pulls on the dyno

02*C5

iTrader: (1)

Unless you have an adjustable valve train stay away, the preload is very tight and YOU NEED an adjustable valve train as per Comp.

quick346

iTrader: (4)

I spin my engine to 7200 every time i drive it. rpm has nothing to do with it as long as you have the right valve springs. up the pre load and the problem will go away

It is that simple

quick346

iTrader: (4)

yes the comp r lifters are a very tight lash and need to be right on.if you are not willing to try more preload on the ls7's then stay away from the comps.

on top of that you dont need them .can't say it enough times up the preload and the noise will go away

butler

I'm running the R lifters. Yes their preload has got to be close. I am still using the stock rocker arms. When I tightened them down checked to see if pushrod was loose and then ran to 22 ftlbs. About 3/4 turn or less. I have run them last year for two months and now with afr225 heads. Spun them to 6900 rpm. No valvetrain noise. Maybe not as good as morels. But so far so good.

eamador11

Same here..running Comp R for 5 yrs now, no issues with stock rockers. I dont know what the pros at ECS set the preload at but it appears to be dead on.

99blancoSS

iTrader: (115)

Yes RPM has everything to do with it. Not saying this is what his issue is and I would think not if he only touched 6500 a couple times but your are wrong to say rpm has nothing to do with it.

Morel recommends their Ultimate lifter for engines seeing a constant 5500+ rpms. Its made with thicker body walls to resist collapsing and cost $750 vs the regular Morel at $525. They also offer a limited travel. All these features are for a reason.... RPM's !

printmanjackson

iTrader: (1)

could the valve springs have anything to do with the problem? maybe not enough seat pressure is causing the valve and lifter to bounce.

02b4ccamaro

iTrader: (3)

I have prc golds in it right now, this is a dumb question but im running ls2 lifter trays can they be installed upside down and that is causing all my problems. i would post a sound chip but you really can not hear it out side of the car you have to be driving and and it happens from 1500 to 2300ish