Is the rocker trunion upgrade worthwhile?
Thread Starter
Instructor
Joined: Dec 2012
Posts: 191
Likes: 23
From: Louisville KY
Is the rocker trunion upgrade worthwhile?
Like many gear heads I would like to keep my 03 Z as reliable as possible. I've read some posts about the Comp Cams trunion upgrade kit, and would like to know if it is really necessary? Do that many engines really have problems? Is it a mod more geared for track cars or will most all benefit?
Lastly, will it help with what I think is the standard LS6 valve train noise?
Looking forward to your feedback.
Lastly, will it help with what I think is the standard LS6 valve train noise?
Looking forward to your feedback.
Melting Slicks
Joined: Mar 2002
Posts: 2,203
Likes: 63
From: Staten Island NY
I believe the trunion upgrade is beneficial for higher lift cams and non stock valve springs.
When I changed my heads and cam I was advised to include the trunion upgrade for having a reliable valve train that can handle up to 7000 rpm.
I don’t recall hearing its needed for a stock engine.
Accurate push rod length was critical in minimizing the dreaded sewing machine sound of the LS valve train for me.,but I doubt there is much that can be done to reduce it on a stock LS engine.
When I changed my heads and cam I was advised to include the trunion upgrade for having a reliable valve train that can handle up to 7000 rpm.
I don’t recall hearing its needed for a stock engine.
Accurate push rod length was critical in minimizing the dreaded sewing machine sound of the LS valve train for me.,but I doubt there is much that can be done to reduce it on a stock LS engine.
Last edited by warren s; Dec 10, 2013 at 09:49 PM.
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From: Dear Karma, I have a list of people you missed.
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Drifting
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Probably going to send them in January, one less thing to cause issues
Team Owner
Joined: May 2001
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From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
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American Heritage Performance
http://www.americanheritageperformance.com/
We provide top tier work at a very reasonable price.
We have been servicing, building and modifying LS engines since 1997
Team Owner
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From: Western NY
The CC kit is $140-150, and the HS rockers are something like $350-400, aren't they? Plus, the CC kit is remove the rocker, press out OE "junk" trunnions and quasi-bearings, then press in CC's real bearings and real trunnions. Reinstall rocker, torque bolt. No worries about lash, pushrod length, etc....
Drifting
Joined: Mar 2011
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From: East Aurora NY
When your ready consider us.
American Heritage Performance
http://www.americanheritageperformance.com/
We provide top tier work at a very reasonable price.
We have been servicing, building and modifying LS engines since 1997
American Heritage Performance
http://www.americanheritageperformance.com/
We provide top tier work at a very reasonable price.
We have been servicing, building and modifying LS engines since 1997
Thread Starter
Instructor
Joined: Dec 2012
Posts: 191
Likes: 23
From: Louisville KY
Are you serious?
The CC kit is $140-150, and the HS rockers are something like $350-400, aren't they? Plus, the CC kit is remove the rocker, press out OE "junk" trunnions and quasi-bearings, then press in CC's real bearings and real trunnions. Reinstall rocker, torque bolt. No worries about lash, pushrod length, etc....
The CC kit is $140-150, and the HS rockers are something like $350-400, aren't they? Plus, the CC kit is remove the rocker, press out OE "junk" trunnions and quasi-bearings, then press in CC's real bearings and real trunnions. Reinstall rocker, torque bolt. No worries about lash, pushrod length, etc....
Thanks for the feedback so far. Does anyone know more detail about specific years that possibly less susceptible to failures?
Race Director
Joined: Sep 2005
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From: Pasco WA
Are you serious?
The CC kit is $140-150, and the HS rockers are something like $350-400, aren't they? Plus, the CC kit is remove the rocker, press out OE "junk" trunnions and quasi-bearings, then press in CC's real bearings and real trunnions. Reinstall rocker, torque bolt. No worries about lash, pushrod length, etc....
The CC kit is $140-150, and the HS rockers are something like $350-400, aren't they? Plus, the CC kit is remove the rocker, press out OE "junk" trunnions and quasi-bearings, then press in CC's real bearings and real trunnions. Reinstall rocker, torque bolt. No worries about lash, pushrod length, etc....
Team Owner
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I got mine for free, and the last time I saw a set for sale was a few years ago. I used the 7.9" PRs that Trickflow supplied, and set them just like the stock rockers. About 7 years ago. I use the stock valve covers, too. The HS rockers don't have needle bearings. No machine work to install. Just sayin', it's an option.
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From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
I also like Harland Sharp's products and quality, but unless there's something I'm missing, they DO in fact, use "needle bearings" in their design.
Harland Sharp:
Harland Sharp:
"Our heavy-duty roller bearing
wall thickness provides the maximum strength that you can rely on. All Harland Sharp Roller Bearings are hand assembled. Each assembly contains 27 needle bearings. These assemblies are knurled to achieve a precision press fit. In addition, they are heat treated and black oxidized to achieve maximum strength and durability."
wall thickness provides the maximum strength that you can rely on. All Harland Sharp Roller Bearings are hand assembled. Each assembly contains 27 needle bearings. These assemblies are knurled to achieve a precision press fit. In addition, they are heat treated and black oxidized to achieve maximum strength and durability."