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Not all are made there but also the prior numbers didnt have their country of origin etc on them so its hard to say when it happened. The gm cathedral rockers did change pn and may have changed to china then but hard to say.
The ls7 are still old pn i believe and ls3 intake. Haven't checked country of origin on them. Maybe next week.
Our max effort bodies and bearings and trunions are still made in the USA.
Not all are made there but also the prior numbers didnt have their country of origin etc on them so its hard to say when it happened. The gm cathedral rockers did change pn and may have changed to china then but hard to say.
The ls7 are still old pn i believe and ls3 intake. Haven't checked country of origin on them. Maybe next week.
Our max effort bodies and bearings and trunions are still made in the USA.
i just got 16 brand new ones, says made in china (mainland) right on the bag.
I have seen a few people ask about the letter version of the CHE trunions. What dose that signify? Was there a change or update to the design do to issues?
Each letter is a production run (D, E, etc) and the version number of that run. They keep improving them and I believe the latest CHE version is E-2.
I'm bumping this. After getting failure rate data and a paredo of root cause I'm significantly more comfortable with my Straubs trunions. I also checked mine and everything is still nice and tight and the valvetrain is quiet on a 600+whp setup. Selling as many trunions as they have their failure rate is pretty darn impressive as is the actual manufacturing defects.
Every LS engine main bearing has center groove in it.
A 5.9 Cummins has a center grooved Trunnion. Diesels run many miles
Surface area.....you do understand that only 3 to 4 needles carry the entire load...the 3 to 4 needles at or around 6 o'clock. The rest of them are just "hanging" around.
All parts are going to fail, anyone and everyone on here has modified the stock GM powerplant...this is Hotrodding. The thing is with a bushing in failure mode it is not going to cause catastrophic engine failure. If a needle bearing fails and finds its way to the LS oil pump...you have nothing left!!!!!
Is one better than the other....arguments can be made for either side. Do both work...Yes. Do OEM's use both in stock builds? Yes. So my advice is...go with what you think is best for you and continue hot rodding.
Every LS engine main bearing has center groove in it.
A 5.9 Cummins has a center grooved Trunnion. Diesels run many miles
Surface area.....you do understand that only 3 to 4 needles carry the entire load...the 3 to 4 needles at or around 6 o'clock. The rest of them are just "hanging" around.
All parts are going to fail, anyone and everyone on here has modified the stock GM powerplant...this is Hotrodding. The thing is with a bushing in failure mode it is not going to cause catastrophic engine failure. If a needle bearing fails and finds its way to the LS oil pump...you have nothing left!!!!!
Is one better than the other....arguments can be made for either side. Do both work...Yes. Do OEM's use both in stock builds? Yes. So my advice is...go with what you think is best for you and continue hot rodding.
yes. Parts will fail. It is the premature failure of the bronze bushings that's an issue. With the bushings. It is not catastrophic, but still a failure that overseen by most until they cut open their oil filter. Roller tip rockers will help alleviate the premature failure when running higher spring pressure and higher lift cams.
yes. Parts will fail. It is the premature failure of the bronze bushings that's an issue. With the bushings. It is not catastrophic, but still a failure that overseen by most until they cut open their oil filter. Roller tip rockers will help alleviate the premature failure when running higher spring pressure and higher lift cams.
My CHE bronze bushings have lasted 10k miles of me flogging the car with dual springs. I inspected them at 8k miles (pics are in this thread) and they barely have any signs of wear. I don't think they're going to fail any time soon.
My CHE bronze bushings have lasted 10k miles of me flogging the car with dual springs. I inspected them at 8k miles (pics are in this thread) and they barely have any signs of wear. I don't think they're going to fail any time soon.
yes. Parts will fail. It is the premature failure of the bronze bushings that's an issue. With the bushings. It is not catastrophic, but still a failure that overseen by most until they cut open their oil filter. Roller tip rockers will help alleviate the premature failure when running higher spring pressure and higher lift cams.
you still think the premature bushing wear is from rocker tip scrub? lulz.
and you do have to remember than running a full roller rocker setup requires more thought than running a stock rocker with aftermarket trunnions. they require more spring pressure to provide adequate valve control, should be made from materials that will withstand the the strain of said spring pressure, and need to be setup with the correct geometry. otherwise you will have more issues than just dealing with slightly increased valve guide and valve tip wear.
most cams are fine, most stay under or right at .600 valve lift. valve tip scrubbing happens over .580 i think, but isn't a huge issue until well over .600
I think if cstraub went with a different bushing alloy like CHE has, they wouldn't wear so fast in situations with high spring pressures putting so much pressure on the bottom of the bushing. the CHE kit also has an advantage in the floating bushing design and the oiling setup. In theory bushings are fine, but we have to remember what we're throwing at it.
if someone with a low-lift cam and springs with lower spring pressure ran the cstraub kit, i would imagine it would last much longer. this is largely where the claims of running 10's of thousands of miles with the bushing kit comes in, i think. it isn't a false claim, but what we're not taking into consideration here is that, with doing anything aftermarket, "your mileage may vary."
you still think the premature bushing wear is from rocker tip scrub? lulz.
after talking to Kenny Duttweiller. Yes depending on your cam lift. and spring rate. If you are using the dual. 660 springs. It is going to be an issue. Under .580 lift with single springs should be ok. It also depends on who's bushings. Manton are probably the best if you can afford them. CHE are probably the best in the normal price range. BTR has a new v2 bushing kit. I wiped out the Smith bros. bushing in 4k miles.
I switched to Comp Cams Ultra Pro Magnum rockers as suggested by Kenny since I'm well over .600 lift.
after talking to Kenny Duttweiller. Yes depending on your cam lift. and spring rate. If you are using the dual. 660 springs. It is going to be an issue. Under .580 lift with single springs should be ok. It also depends on who's bushings. Manton are probably the best if you can afford them. CHE are probably the best in the normal price range. BTR has a new v2 bushing kit. I wiped out the Smith bros. bushing in 4k miles.
I switched to Comp Cams Ultra Pro Magnum rockers as suggested by Kenny since I'm well over .600 lift.
Interesting on Smith Brothers...many have used them for much longer intervals without issue.
01-30-2020, 03:53 PM
