Which rocker arms?
Which rocker arms? 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?
.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?
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.
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!
Thanks!
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?
.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?
http://www.briantooleyracing.com/com...union-kit.html
http://www.briantooleyracing.com/btr...union-kit.html
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Glenn ***
Sales Tech
www.bmrsuspension.com
813.986.9302
Find a Quality alignment shop near you!
Glenn ***
Sales Tech
www.bmrsuspension.com
813.986.9302
Find a Quality alignment shop near you!
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!
Thanks!
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.
We stock the Comp Cams Trunion Upgrade Kit for $134.95 + s/h.
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!
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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.
You are correct, he also says DO NOT shim the stockers for a better wipe.
TECH Fanatic
Joined: Aug 2004
Posts: 1,373
Likes: 4
From: Auckland, Nth Is, New Zealand.
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
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
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.
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.
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.
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.
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.
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.
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.
I never had any issues with the upgraded stock rockers... bronze guides as well.