Question for those with trunnion upgrade
Thread Starter
Burning Brakes
Joined: Jul 2002
Posts: 1,137
Likes: 100
From: Nova Scotia
Question for those with trunnion upgrade
I've been reading a lot about trunnion upgrades lately and I see a lot of people who go with the bushing style report less valvetrain noise. Have people who have gone with a needle bearing style also noticed less valvetrain noise? Thanks
PS: I know to stay away from comp, but there are some other companies that make what looks like good needle bearing style trunnions.
PS: I know to stay away from comp, but there are some other companies that make what looks like good needle bearing style trunnions.
Safety Car
Joined: May 2011
Posts: 3,807
Likes: 508
From: Oshawa, Ontario
Another type of needle bearing is still a needle bearing and may still end up falling into your engine.I use the CHE manganese bronze trunion bushings that are capable of carrying 300 times the weight of a needle bearing spread across a much larger area to prevent this issue.My valve train is whisper quiet.Good luck with whatever you choose.
Melting Slicks
Joined: Jan 2017
Posts: 2,707
Likes: 897
From: CONCORD CA.
i recently did a cam upgrade ( Texas speed stage 2 ). i did upgrade the lifters & springs but, kept the stock rockers.
these were very noisy at idle. just off idle they quieted down a lot.
after some other unrelated head work, i had the rockers switched to a trunnion bearing.
that made all the difference. their was no valvetrain noise.
these were very noisy at idle. just off idle they quieted down a lot.
after some other unrelated head work, i had the rockers switched to a trunnion bearing.
that made all the difference. their was no valvetrain noise.
Thread Starter
Burning Brakes
Joined: Jul 2002
Posts: 1,137
Likes: 100
From: Nova Scotia
i recently did a cam upgrade ( Texas speed stage 2 ). i did upgrade the lifters & springs but, kept the stock rockers.
these were very noisy at idle. just off idle they quieted down a lot.
after some other unrelated head work, i had the rockers switched to a trunnion bearing.
that made all the difference. their was no valvetrain noise.
these were very noisy at idle. just off idle they quieted down a lot.
after some other unrelated head work, i had the rockers switched to a trunnion bearing.
that made all the difference. their was no valvetrain noise.
Race Director
Joined: Mar 2011
Posts: 13,262
Likes: 3,151
From: SW Florida
2021 C6 of the Year Finalist - Modified
I read a bunch of reviews on the various trunnion upgrade kits .... Seems like the bronze trunnion bushings hold up better than the steel trunnion bushings.
I know the CHE Precision trunnion upgrade uses the bronze bushings and has good reviews.
________________________________________
Also the Smith Bros / Straub trunnion upgrade also uses the bronze bushings . . . . . .
I know the CHE Precision trunnion upgrade uses the bronze bushings and has good reviews.
________________________________________
Also the Smith Bros / Straub trunnion upgrade also uses the bronze bushings . . . . . .
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Burning Brakes
Joined: Nov 2019
Posts: 885
Likes: 43
From: Newport, south Wales
Here is a before video of one of my stock rockers on stocker bearing after 140k miles.
i will be upgrading shortly to 1.9:1 ratio rockers, and btr needle bearings, plus a comp cams valve spring kit. More to follow.
i will be upgrading shortly to 1.9:1 ratio rockers, and btr needle bearings, plus a comp cams valve spring kit. More to follow.
Instructor
Joined: Jul 2017
Posts: 120
Likes: 2
I've been reading a lot about trunnion upgrades lately and I see a lot of people who go with the bushing style report less valvetrain noise. Have people who have gone with a needle bearing style also noticed less valvetrain noise? Thanks
PS: I know to stay away from comp, but there are some other companies that make what looks like good needle bearing style trunnions.
PS: I know to stay away from comp, but there are some other companies that make what looks like good needle bearing style trunnions.
I had a trunion failure I thought my engine was knocking. This was a few years ago my c6 only had 50k miles when it failed . A must fo mod in my opinion you don't want little needle bearings in your engine . Only took about a hour to do.
