No more needles!
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FormerVendor
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From: Mcleansville, NC
I can also say that every single part of this trunion kit is manufactured in America.
Thread Starter
FormerVendor
iTrader: (2)
Joined: Oct 2015
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From: Mcleansville, NC
I will check, but I doubt it honestly. Each kit is ordered to be sold as a full set, and if we pirated a half set from a full set, then there would only be a half set left.
That said, I will check for you and see if your needs can be accommodated.
That said, I will check for you and see if your needs can be accommodated.
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Thread Starter
FormerVendor
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Joined: Oct 2015
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From: Mcleansville, NC
The load with a bushing is spread out over a much larger surface area which reduces wear since that contact load is spread out. With a needle bearing the load is concentrated on just a few needles and those same needles are loaded over and over again.
Although the load that the bushing sees is concentrated on the same area over and over again, the key is that it is spread out over a larger area which reduces wear compared to a needle bearing.
One thing I'd also like to mention, anyone using these bushing trunion kits should invest in a good oil that has high amounts of ZDDP. Most of your shelf oils like Royal Purple, Mobile 1, etc. have 800 or less PPM ZDDP. IMO this is not enough to keep a push rod motor happy with higher lift camshafts, more aggressive lobe designs and higher spring pressures. For example, VR1 has 1300 PPM ZDDP and some oils like Brad Penn ($$$) have 2000 PPM or more.
Even if you don't use these bushing trunion kits, IMO if you have an aftermarket camshaft with more lift than stock, aftermarket springs with more spring pressure than stock, or any other internal engine modifications I'd recommend an oil with high levels of ZDDP.
Vavoline VR1 is one of the best oils to use in these situations IMO. I like VR1 because it's cheap ($6.00-$7.50 a quart depending on where you live) and it has worked extremely well in every engine I have used it in.
Let me ask a question here since the one in the FI section didn't get answered 
Longevity is what I was concerned with, but here's another take:
We're all well aware of the LS7 guide issues. Do you think these might have ANY bearing whatsoever on possibly extending the life of those valve guides or helping in the slightest?
You've got my attention Martin. I hate the damn needles myself. My ONLY concern is if the bushings rotate around so different parts see loads at different times
(kinda like how a dual valve spring will spin around on it's own at higher RPM... why stock locks are recommended over say Super 7's that absolutely lock the retainers in place and don't allow movement)
I guess I want to know will the same 30% be seeing the load the entire life cycle?
Longevity is what I was concerned with, but here's another take:
We're all well aware of the LS7 guide issues. Do you think these might have ANY bearing whatsoever on possibly extending the life of those valve guides or helping in the slightest?
You've got my attention Martin. I hate the damn needles myself. My ONLY concern is if the bushings rotate around so different parts see loads at different times
(kinda like how a dual valve spring will spin around on it's own at higher RPM... why stock locks are recommended over say Super 7's that absolutely lock the retainers in place and don't allow movement)
I guess I want to know will the same 30% be seeing the load the entire life cycle?
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Thread Starter
FormerVendor
iTrader: (2)
Joined: Oct 2015
Posts: 576
Likes: 14
From: Mcleansville, NC
Let me ask a question here since the one in the FI section didn't get answered
Longevity is what I was concerned with, but here's another take:
We're all well aware of the LS7 guide issues. Do you think these might have ANY bearing whatsoever on possibly extending the life of those valve guides or helping in the slightest?
You've got my attention Martin. I hate the damn needles myself. My ONLY concern is if the bushings rotate around so different parts see loads at different times
(kinda like how a dual valve spring will spin around on it's own at higher RPM... why stock locks are recommended over say Super 7's that absolutely lock the retainers in place and don't allow movement)
I guess I want to know will the same 30% be seeing the load the entire life cycle?
Longevity is what I was concerned with, but here's another take:
We're all well aware of the LS7 guide issues. Do you think these might have ANY bearing whatsoever on possibly extending the life of those valve guides or helping in the slightest?
You've got my attention Martin. I hate the damn needles myself. My ONLY concern is if the bushings rotate around so different parts see loads at different times
(kinda like how a dual valve spring will spin around on it's own at higher RPM... why stock locks are recommended over say Super 7's that absolutely lock the retainers in place and don't allow movement)
I guess I want to know will the same 30% be seeing the load the entire life cycle?
To my knowledge the valve guide and exhaust valve issue with the LS7 engine is not caused by an issue with the rocker arm. I am not an expert on the LS7 issues, but my understanding was a poor choice in the design of the exhaust valve opened the door to guide issues and the issues the LS7 has experienced.
The needle bearing that encapsulates a rocker arm trunion does not rotate 360* around the trunion during engine operation, and neither does the bushing in my kit. It's not like a needle bearing in a roller lifter that has a wheel. The needle bearing only rotates as far as the rocker is actuated. In this instance for the needle bearing to rotate 360*, the entire rocker would have to also rotate 360* like the wheel of a roller lifter.
So in this same instance no matter needle or bushing, the same needles or the same area of the bushing sees the same load over and over again. In a needle bearing application, only a few out of all those needles see load which means that load is concentrated in a much smaller area than with a bushing which spreads it out over a larger area.
This is where the bushing is superior in terms of handling load and wear. Since the area that the load is being placed upon is greater, the actual load that the part sees is significantly less leading to less wear and tear on moving parts.
I've also sold 30 kits +/- so far personally, so there will a lot of them out there making the rounds very soon.
I saw Chris post this on Yellowbullet in regards to the bushed lifters:
Can the same be said for the rocker bushing?
Can the same be said for the rocker bushing?
Thread Starter
FormerVendor
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Joined: Oct 2015
Posts: 576
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From: Mcleansville, NC
The only way to know for sure when the best time to change oil would be, is to conduct an oil analysis.