Trunion Upgrade
Thread Starter
Drifting
Joined: Oct 2005
Posts: 1,257
Likes: 4
From: North Carolina
Trunion Upgrade
I am doing an engine build. I have a lot invested. I just recently started looking into these. Think they might be a nice safety net instead of using stock rockers. I need a set that aren't going to change the Pushrod geometry as I just ordered new pushrods and don't intend on measuring them again. Looking for a quality set; easy home installation. If I can fit it in the budget and its a worthwhile part I will do it. Which ones are the favorite on here?
DG
DG
Track Junky
Joined: Jun 2007
Posts: 4,074
Likes: 36
From: Orlando Area
Tech Contributor
Most everyone I have seen (including myself) are using the Come Camp trunion upgrade. The stock needle bearings aren't captured well and are pretty sloppy. Comp Cams are a nice and easy replacement, took me about an hour once off the car with basic tools. Good peace of mind for the money IMO.
Safety Car
Joined: Dec 2009
Posts: 4,754
Likes: 303
Most everyone I have seen (including myself) are using the Come Camp trunion upgrade. The stock needle bearings aren't captured well and are pretty sloppy. Comp Cams are a nice and easy replacement, took me about an hour once off the car with basic tools. Good peace of mind for the money IMO.
Track Junky
Joined: Jun 2007
Posts: 4,074
Likes: 36
From: Orlando Area
Tech Contributor
A couple were more snug than others. I tapped the trunion side to side a hit and rotated it by hand until it loosened up - they all did. Just need to pay attention on how hard the bearings are pressed in and where the snap ring is in relation to other components. Not difficult, just use common sense.
Safety Car
Joined: Aug 2006
Posts: 4,347
Likes: 25
From: Apache Junction AZ
A couple were more snug than others. I tapped the trunion side to side a hit and rotated it by hand until it loosened up - they all did. Just need to pay attention on how hard the bearings are pressed in and where the snap ring is in relation to other components. Not difficult, just use common sense.
BJK
Last edited by 07MontRedcp; Sep 26, 2012 at 12:22 PM. Reason: Clarification
Track Junky
Joined: Jun 2007
Posts: 4,074
Likes: 36
From: Orlando Area
Tech Contributor
Not in either one that I did. If you have ever done machining or assembly, it takes a certain feel. Just don't go crazy pressing in the bearings. You can feel and see when they bottom out, the goal is to be consistent.
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Pro
Joined: Oct 2011
Posts: 695
Likes: 94
From: NC
The GM "stock" trunions are a real P.O.S. and have a lot to be desired!
Safety Car
Joined: Aug 2006
Posts: 4,347
Likes: 25
From: Apache Junction AZ
They probably will, but you would have to re-check after awhile. I did mine at about 4k and the stock rockers were not scuffed too bad. I really wanted a "full" roller rocker, but was not that impressed with what is affordable. If I would do them it would be the Jessel set up. I did my Comp Cams trunions in the lathe as you do not need much of a press and pressing the bearings in as straight as possible is "very important". The kit I got comes with hardened flat washers to seat the bearings and the snap rings are only a safety measure as they are no where near anything. If anyone is interested in how to do it in the lathe, I would be more than happy to explain. If I used a vice or a press, I would use a good machinist vice with ground jaws that track very flat. Or an Arbor Press so you have some "feel".
The GM "stock" trunions are a real P.O.S. and have a lot to be desired!
The GM "stock" trunions are a real P.O.S. and have a lot to be desired!
BJK
Thread Starter
Drifting
Joined: Oct 2005
Posts: 1,257
Likes: 4
From: North Carolina
Well I think that pretty much answers all my questions without me actually having to ask any of them. Thanks 07MontRedcp!
I will order them up and we will add it to the build thread!
DG
I will order them up and we will add it to the build thread!
DG