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Old 10-18-2015, 04:56 PM   #1
IMPERIALBLUE2SS
 
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Summit racing Trunnion upgrade kit

Has anyone had any experience with the summit racing Trunnion upgrade Kit? Currently researching parts for my upcoming cam install and noticed this on summit racing website. Looks exactly like comp Kit. Just wondering if anybody has used it and their results, opinions, concerns of the Kit. Thx!
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Old 10-18-2015, 07:57 PM   #2
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I used comp cams, and after 10k kms every single trunion is spalled on the bottom side. I'm rebuilding my engine and won't be doing a trunnion bearing again. Going with Che bushings


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Old 10-18-2015, 11:43 PM   #3
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I almost went with CHE bushings, but decided on the BTR micro-polished, cryo- treated rocker set with the BTR trunnion upgrade, which has been shown to be a little better quality than the COMP and other trunnion upgrade variants.
If you plan to run much over 400lb springs, I HIGHLY, HIGHLY recommend the CHE bushing option. It's about $480+core(or send yours in and wait about a week), but you are talking about a GREATLY increased contact area to spread the axial load better. Guys are running 430-450lb open spring pressures on .620+ lift with no signs of wear after 30k miles...
If you're interested in the CHE option, look up west coast cylinder head.
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Old 10-18-2015, 11:58 PM   #4
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It's more expensive but once the trunnion fails and you have to do it again and again it's cheaper in the long run. And don't bother with wcch. They are a 3rd party company. You send yours to them then they send them to Che, they don't do them they just charge you more. Or you could ship directly to Che, and pay less. 420 I think it was. Cut out the middle man.


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Old 10-19-2015, 12:56 AM   #5
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True, but if a guy wants a set in a few days, he can order a pre-made set from WCCH. I agree that direct to CHE with your rockers is the cheapest way. Either way, a nice little unit:
http://www.proheads.com/images/chels1rocker.jpg
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Old 10-19-2015, 06:07 PM   #6
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Thanks I'm going with the Tick polluter cam, I guess I need to see what the open spring pressure will be and decide which avenue to take. Got a kid in medical school so that cuts down on my mod money tremendously! Thanks again!
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Old 10-19-2015, 06:09 PM   #7
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Quote:
Originally Posted by IMPERIALBLUE2SS View Post
Thanks I'm going with the Tick polluter cam, I guess I need to see what the open spring pressure will be and decide which avenue to take. Got a kid in medical school so that cuts down on my mod money tremendously! Thanks again!

i understand you completely. look up used CFD. and see talk to him about how many trunnion kits hes gone through now.! always cheaper to do it right the first time
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Old 10-19-2015, 06:17 PM   #8
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Do it right. Do it once.

http://www.compperformancegroupstore...Category_Code=
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Old 10-19-2015, 06:47 PM   #9
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Exactly, skip the comp stuff and at least get the BTR stuff. Comp isn't that good IMO. Seen way too many of them fail.
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Old 10-19-2015, 11:31 PM   #10
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Decided on btr for now. If I have any issues whatsoever, jessel shaft mounted and be done.
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Old 10-19-2015, 11:31 PM   #11
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Summit racing Trunnion upgrade kit

Jessels wowza, glad you decided against conp


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Old 10-20-2015, 08:42 AM   #12
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T&D or Crower are nicer than the Jessels.
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Old 10-20-2015, 11:50 AM   #13
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The Comp trunion upgrade is fine for stock or GMPP modifications. If your running any kind of agressive lobe or spring pressure you need to invest in quality rocker arms. Comp isn't crap its just people are using the trunion upgrade for the wrong application.
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Old 10-20-2015, 12:45 PM   #14
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But BTR is better for same money. So why even bother with comp.
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Old 10-20-2015, 02:00 PM   #15
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Quote:
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But BTR is better for same money. So why even bother with comp.
Im just saying the correct parts for the application will yield better results.
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Old 10-20-2015, 03:23 PM   #16
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BTR all the way for the price, great products and great support.
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Old 10-20-2015, 04:44 PM   #17
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I think it's more of a design flaw than a quality issue. Years ago when roller rockers hit the aftermarket Harley scene we had similar failures. Most companies went back to bushings but retained the roller tip. It's similar to the problem you get when a drive shaft doesn't have enough angle. Bearings are designed to rotate, when used in a rocker arm there is not enough rotation to the bearings causing more stress than the needles are designed to take, add to that aggressive cams and spring rates and failure is bound to happen. One advantage with the stock rockers is that when the bearings fail they stay trapped in the rocker for a while, when the comp units fail the bearing cage and snap ring fail and everything ends up in the motor rather quickly.

When I do my motor over all most likely be going with bushings, they don't fall apart.
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