Billy Bad WS7

I've got the F1 cam, 918's, hardened stock length rods, and now i'm adding the comp "r" lifters, any suggestions on which rockers to go with. I've heard adjustables are better with these lifters can anyone confirm or deny that? Thanks.

LS1x2

iTrader: (11)

Adjustables would be better, but you can shim the stock ones and get em working. That is what I did.

SSInnovations

iTrader: (8)

Go adjustable, the comp pro mags are a nice set and for around 450 you can’t go wrong. I would be uneasy shimming the stock ones, although it has been done.

LS1x2

iTrader: (11)

Y uneasy? It's not much different than going to a shorter pushrod if you mill the heads/etc?

Country Boy

iTrader: (24)

+1

JaSSon

iTrader: (11)

What about with YTs? Im using comp r's on my new H/C set up and was going to check pre load as per YT instructions like I did when I put them on. Is this gonna work?

DOC OTIS

iTrader: (9)

Shouldn't matter what rocker set-up you use as long as you run .012 - .015 preload - which is what the comp r lifter is supposed to have. I just put my YT rockers on tonight and followed jmx's how to directions and they came out perfect.

Jason99T/A

iTrader: (21)

Shimming the rocker stand will effect your valvetrain geometry. If shimmed enough, you may have some major valvetrain issues. You "can" reduce lifter preload by shimming the rocker stand, but the proper way is through pushrod length.

I have used Comp Rs in the past with stock rockers. It can be done, but it will take some careful setup. Adjustable rockers would definitely make the job much easier, though.

tollway bandit 1

iTrader: (2)

i have a t1 with .o30 cut heads. mti told me to sim it and it would be, if they do i say its cool.

GTBMad

Have seen them fitted with non adjustable rockers, there technical notes say they should be fitted with adjustable rockers and preload is .002 - .004


http://www.compcams.com/Technical/Ca...ML/282-289.asp

DOC OTIS

iTrader: (9)

Think thats for a different lifter. Gonna call Comp and find out for sure what the pre-load is supposed to be.

eallanboggs

iTrader: (1)

If you going to consider CC Pro Mags don't forget to give the Jesel shaft mounts some consideration as well.

GTBMad

I have Comp Rs and if you check the sponsors websites that is the part number 875-16. If you read the litreature it also states they are for LS1 use.

The 850-16 are there standard replacement lifter for the LS1

Country Boy

iTrader: (24)

This man is right on

I had mine setup with the stock rockers and stock preload and talk about noisey?! I could hear the valvetrain over the car and exhaust while driving!

taqwache

that is how i am going to run them. stock rockers, PRs and unshaved heads. is it loud enough to cause any KR? i dont care about noise, i just dont want it to cause problems.

383ss

iTrader: (14)

I have YT's with Comp R's and they are fine. I didn't install them, so I don't know what the preload was.

LS1x2

iTrader: (11)

You can shim up to .04" with no problems at all. They make pushrods in .05" increments. You can say what you want, but I've done this and know it to be fact.

Nasty N8

iTrader: (33)

They work great together I have done it many times with Comp R and YT or Harland Sharp`s. You just need to get the preload right. Shimming the rockers causes no problems with your valve train.

Nate

Jason99T/A

iTrader: (21)

If you read what I posted, you will notice that I said "if shimmed enough" you will may have valvetrain issues due to your valvetrain geometry being incorrect. I never once said it couldn't be done, as I have shimmed the rocker stands in the past as well. You just need to be very careful when shimming as it does effect valvetrain geometry. If everything checks out fine after shimming, then you are all set. I just didn't want people to think they could shim their rockers .500" to get the correct preload. Get it as close as possible with your pushrod length and then only use the shims to make small changes.

Jason

Billy Bad WS7

So it's easier to set up (more fool proof) if i get the adjustables correct?