CamaroSS22

iTrader: (1)

im looking for a good set of strong rocker arms for my 2001 ls1 camaro and i was looking at the yella terra shaft mounted and the comp cams aluminum shaft mounted. is there any real advantage to having all the rockers mounted on a single shaft and are the comp cams ones really worth the extra money? also is it possible to adjust valve lash on either of these rocker arms?

zamboxl

iTrader: (1)

i think comp cam adjustabels are the promags only don't know about yella

DAPSUPRSLO

iTrader: (14)

Its not that all rockers are mounted on a single shaft, it is the way the rockers are retained to the heads. Take one look at the yella terra style and the Jessel, Comp, or T&D and there is no comparison. The yella terras rely on a shaft and bolt for each pair and have individual pivot bearings. The others rely on a huge cradle that runs the entire length of the head which each pair of rockers pivoting on a shaft. The true shaft systems are lighter over the valve tip as well which is very important.

gojo

iTrader: (12)

Shaft mounted rockers reduce the problems pedestal mounted rollers can experience if the pedestals are not all exactly the same.

SSINFUL

Bingo. But, this can be overcome w/ shimming. The Comps aren't that expensive. Neither are the Cranes. Depends on what "expensive" is...

Any/all are better than stock.

gojo

iTrader: (12)

That's a picture of my stock rocker. Notice the wear spot is off center. It probably is a good indication that pedestal roller rockers will be a problem. I had my stockers rebuilt by HS after I noted the wear on my HS RR's. They are a good alternative to shaft mounts.

DavidNJ

The Yella Terras are an interesting setup. They pin the stud. So the roller is axially fixed. Like a shaft. A mini-shaft. No guideplates.

However, other than price, I would use a real shaft unless I was doing a budget setup. Then I would use a stock setup.

I believe stock setup would work with an XE-R or equivalent (Crane has equivalents) with aftermarket springs, lifters, timing chain, and pushrods. Less than $1000 total. Add in a set of headers with X-pipe ($1500-1800 on a Z06 with cats), LS1Edit, and that would be a budget setup. IMHO. Most people would add an intake and maybe an underdrive pulley to that.

If heads (say AFR205s), intake (FAST), 90mm tb, bigger injectors, are added, I would add the shafts also. And if the bottom end cam apart, shafts would be a small part of the budget.

V8er

iTrader: (2)

DavidNJ, do you think the Jesel SS rockers would suffice for most applications or are you talking about the $1000+ shaft rockers?