4WOFURY

iTrader: (2)

In need of some rockers, and wanted to get some input and direction. Looking to keep stock ratio (1.7, correct?)

.610 lift cam on XE-R lobes
862 (5.3) heads

Car is a weekend warrior/grudge type car, so not looking to fit into any classes. It does see the occasional cruise however.

I have a fairly open budget, so looking to get something durable and nice.

I've been leaning towards stock rockers with trunion upgrade, but is there better available?

Always2Slow

iTrader: (8)

I really like the comp ultra pro magnums if your on a budget. They are 1.8 ratio though and your cam wouldn't work with them. Many people will tell you Yella Terra Lites but they are aluminum and won't hold up in the long run and are known for breaking mostly for improper installation or used in a conjunction of parts that loft valves and lifters.

Mercier

iTrader: (15)

Hi, I was curious about this as another option for budget rollers. I looked on Comp's site and could not find an application for LS-type motors. I just saw things like "Chevy V8, x00-400" (and other brands). Is the rocker setup on the LS similar enough to SBC or am I looking in the wrong place?

Thanks!

BMR Sales2

iTrader: (40)

I really like using the factory rocker arms with trunion upgrade. I use them in both of my LS powered vehicles and have never had one issue. Both Brian Tooley Racing and Comp Cams make nice trunion upgrade kits. The nice thing about the trunion upgrade is it is super easy to do, it is affordable, and they just plain out work well. I really see no reason to use expensive (and often times heavy rocker arms) unless you are building a more extreme motor that will see crazy RPM. Here are a couple links that will help you out:

http://www.briantooleyracing.com/com...union-kit.html

http://www.briantooleyracing.com/btr...union-kit.html

Always2Slow

iTrader: (8)

http://www.jegs.com/i/Comp-Cams/249/1675-16/10002/-1

Beau@SDPC

iTrader: (14)

My vote also goes to factory rockers with trunion upgrade. They are lighter than most aftermarket setups and with less weight on the tip, you will better valve train stability.

We stock the Comp Cams Trunion Upgrade Kit for $134.95 + s/h.

Mercier

iTrader: (15)

Oh snap! Nice. Comp's site is PIA and slow so I probably just clicked too fast.

What's the deal on going to studs? What kind of studs and does that mean the rockers have to be adjusted? Once or periodically?

I am shamelessly hijacking as I think the OP might want to know these things if they were to follow your recommendation.

Thanks!

mjs1012

iTrader: (36)

+1 for stock rockers with trunion upgrade. It took me like 20 minutes to do.

vettenuts

iTrader: (4)

I didn't think Brian Tooley supported the use of stock rockers on that high of a lift cam due to the scrubbing (he has numerous posts on this). I know I couldn't get a good geometry out of the stock rockers and finally gave up.

LsF-150

iTrader: (2)

You are correct, he also says DO NOT shim the stockers for a better wipe.

ls1 1990 VN

I had bad stability with my Harlan sharp rockers while using my new Tick SNS stg 3 cam, engine wouldn't rev.
Changed back to my stock rockers & added the Truunion upgrade & it works well.

When I was cam only with a TSP 231/237 cam the Harlan Sharp rockers worked well, I was changing gear at 6800rpm

4WOFURY

iTrader: (2)

I really like what I've read on those, but like you've said, I'm looking for a 1.7 rocker.

The engine doesn't see crazy rpm, as it's limited by the stock rod bolts... generally 6800 on motor and 6500 on nitrous. It does get street driven occasionally, some times taken on cruises for a few hundred miles; it also sees lots of track time, typicallly hundreds of passes a year (I've had a few days where I was trying to get something dialed in and ended up with fat stacks of slips... oops)

I keep seeing failures from aftermarket rockers, trunion upgrades, stock rockers, etc. There are so many horror stories available!

I don't mind going aftermarket, and up to ~$500 is acceptable (can't quite justify $1200 on some Jesels), but I'm thinking that stockers with trunion upgrade may be the way to go. If the best option just happens to be cheap, I'm all for it.

Brian Tooley Racing

iTrader: (13)

Valve tip damage can occur with too much lift and too much open spring pressure when using stock rockers. So we recommend a maximum of .630" valve lift and 400 lbs open spring pressure when using stock rockers.

Paul Bell

iTrader: (9)

With 155 Lbs on the seat pressure an .638 lift, I went with the Crower shaft rockers. Several features the others didn't have made me go that way.

vettenuts

iTrader: (4)

Any links to those rockers? Would like to take a look at them.

Paul Bell

iTrader: (9)

I ordered mine with the optional roller tips.
http://www.crower.com/rocker-arms/al...chevy-ls1.html

Paul Bell

iTrader: (9)

The Crower rockers have a shaft oiling hole the Jessels don't and they're closed across the rocker tip making them stronger. And the slot guides oil to the tip. I felt like it was a better design. And less costly than the Jessels.

JakeFusion

iTrader: (7)

But will they blend?

How is the weight at the tip, Paul?

I would vote for stock rockers and trunion upgrade for the XE-R lobes. As Brian stated, .630" lift and 400lbs of spring pressure and you're good. The downside is if you end up with a big heavy stainless steel valve might need more pressure to handle. So if you're running stock valves or hollow-stem aftermarket/LS3, then you'll be more than good with some BTR springs or PAC 1904s.

Paul Bell

iTrader: (9)

I have no clue how it's tip weight compares to other rockers. I would imagine the slightly added weight bridging across the tip is offset by the slightly removed weight in the slot that starts at the shaft oil hole.

dr_whigham

iTrader: (49)

I went with just a hair over 400# open, 160 on the seat, and my lift was .631 (numbers are approximate. I shimmed my BTR Platinums to 1.750 installed height)

I never had any issues with the upgraded stock rockers... bronze guides as well.