Comp Cams rocker arm trunion upgrade!!!
04-20-2010, 04:49 PM
#28
While needle bearings and roller bearings are similar the needle bearing is open on one or two sides and only held by a cage where a roller bearing is held by a middle cage and an inner and outer casing. while needle bearings are just that they look like needles. Roller bearings can be made out of ball, needle, or any type of bearing as long as it is encased thus "rolling" on the casing.
Roller bearing
Needle Bearing
Hence as you can see the is greater ability to loose a needle bearing than there ever be of loosing a bearing out of a roller bearing. Also you can see the where the rocker is making contact directly with the bearing itself in the needle bearing where the rocker on the roller bearing is actually moving on the casing itself. Therefore failure being less likely with a roller bearing than with a needle bearing set up.
Roller bearing
Needle Bearing
Hence as you can see the is greater ability to loose a needle bearing than there ever be of loosing a bearing out of a roller bearing. Also you can see the where the rocker is making contact directly with the bearing itself in the needle bearing where the rocker on the roller bearing is actually moving on the casing itself. Therefore failure being less likely with a roller bearing than with a needle bearing set up.
04-20-2010, 05:58 PM
#29
http://www.compcams.com/information/...yID=1508422545
Unless I'm reading this incorrectly, the new design doesn't seem to use needle bearings.
Unless I'm reading this incorrectly, the new design doesn't seem to use needle bearings.
04-20-2010, 10:57 PM
#32
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Wow look at all the quotes.
Sorry for the delay guys, I was out in the field today.
I'm going to try to clear up the confusion.
Buckle your seat belts.
Below is a thread about the older caged bearings that harland sharp was using. As you will see the older caged bearings were causing scoring issues on the trunion itself.
https://ls1tech.com/forums/generatio...cs-inside.html
I myself was unlucky enough to purchase a set of Harland rebuild rockers with the older style caged bearings. I never had issues because I didn't have them on long enough.
Rather then send the rockers back to Harland sharp ( because I was kind of pissed at the time. ) I decided to buy the Comp trunion upgrades about 6 months ago. These were a brand new item from Comp at the time. I wonder if they are made by the same company.
When I received the kit I noticed they didn't have the washers like the Harland sharps did and still do. So basically the Comp vs Harland kits look identicle other then the lack of washers on the Comp kit.
Both the Comp and Harland newer style bearings have a lot more needles bearings in them with nothing but the outter race and trunion to keep them in place. Since I had all the little thin washers from my old Harland Sharp rockers, I used those when I installed the Comp trunion kit.
I see those washers as an additional safety measure in an attempt to keep those tiny needle bearings contained in the event of a bearing-case or trunion failure. Plus you won't have the retaining clip against the bearing shell itself.
.
Sorry for the delay guys, I was out in the field today.
I'm going to try to clear up the confusion.
Buckle your seat belts.
Below is a thread about the older caged bearings that harland sharp was using. As you will see the older caged bearings were causing scoring issues on the trunion itself.
https://ls1tech.com/forums/generatio...cs-inside.html
I myself was unlucky enough to purchase a set of Harland rebuild rockers with the older style caged bearings. I never had issues because I didn't have them on long enough.
Rather then send the rockers back to Harland sharp ( because I was kind of pissed at the time. ) I decided to buy the Comp trunion upgrades about 6 months ago. These were a brand new item from Comp at the time. I wonder if they are made by the same company.
When I received the kit I noticed they didn't have the washers like the Harland sharps did and still do. So basically the Comp vs Harland kits look identicle other then the lack of washers on the Comp kit.
Both the Comp and Harland newer style bearings have a lot more needles bearings in them with nothing but the outter race and trunion to keep them in place. Since I had all the little thin washers from my old Harland Sharp rockers, I used those when I installed the Comp trunion kit.
I see those washers as an additional safety measure in an attempt to keep those tiny needle bearings contained in the event of a bearing-case or trunion failure. Plus you won't have the retaining clip against the bearing shell itself.
.
Last edited by bearcatt; 04-20-2010 at 11:06 PM.
04-20-2010, 11:23 PM
#33
Well damn.
My plan was to assemble a stout setup when I really tear into the motor next month. Rod bolts/trunion upgrade, dual springs, etc. I'm on the fence now as to whether I should go with the Comp upgrade, the Harland Sharp upgrade (which is considerably more expensive - even the DIY), or just stick with the stock-style rockers (I'd prefer to upgrade, but don't plan to shell out $400+ for new rocker arms entirely).
My plan was to assemble a stout setup when I really tear into the motor next month. Rod bolts/trunion upgrade, dual springs, etc. I'm on the fence now as to whether I should go with the Comp upgrade, the Harland Sharp upgrade (which is considerably more expensive - even the DIY), or just stick with the stock-style rockers (I'd prefer to upgrade, but don't plan to shell out $400+ for new rocker arms entirely).
04-20-2010, 11:39 PM
#34
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Well damn.
My plan was to assemble a stout setup when I really tear into the motor next month. Rod bolts/trunion upgrade, dual springs, etc. I'm on the fence now as to whether I should go with the Comp upgrade, the Harland Sharp upgrade (which is considerably more expensive - even the DIY), or just stick with the stock-style rockers (I'd prefer to upgrade, but don't plan to shell out $400+ for new rocker arms entirely).
My plan was to assemble a stout setup when I really tear into the motor next month. Rod bolts/trunion upgrade, dual springs, etc. I'm on the fence now as to whether I should go with the Comp upgrade, the Harland Sharp upgrade (which is considerably more expensive - even the DIY), or just stick with the stock-style rockers (I'd prefer to upgrade, but don't plan to shell out $400+ for new rocker arms entirely).
Another thing about the Comp upgrade is that it doesn't come shipped with the rocker arm bolts either. You can use the stock bolts. With the Harland upgrade the stock rocker bolts wont fit.
EDIT: Brian from SpectacleSolutions has them with rocker bolts.
The rockers that are real popular on here are the Yella Terras.
A little pricey though.
Also for valve springs.
The PAC nitrided beehives are supposed to be the big buzz.
http://www.corvettefever.com/techart...nfo/index.html
Plus dual springs get noisy when they expand from the heat.
They drove me nuts when I had them.
.
Last edited by bearcatt; 04-20-2010 at 11:54 PM.
04-20-2010, 11:44 PM
#35
04-20-2010, 11:54 PM
#38
Wow look at all the quotes.
Sorry for the delay guys, I was out in the field today.
I'm going to try to clear up the confusion.
Buckle your seat belts.
Below is a thread about the older caged bearings that harland sharp was using. As you will see the older caged bearings were causing scoring issues on the trunion itself.
https://ls1tech.com/forums/generatio...cs-inside.html
I myself was unlucky enough to purchase a set of Harland rebuild rockers with the older style caged bearings. I never had issues because I didn't have them on long enough.
Rather then send the rockers back to Harland sharp ( because I was kind of pissed at the time. ) I decided to buy the Comp trunion upgrades about 6 months ago. These were a brand new item from Comp at the time. I wonder if they are made by the same company.
When I received the kit I noticed they didn't have the washers like the Harland sharps did and still do. So basically the Comp vs Harland kits look identicle other then the lack of washers on the Comp kit.
Both the Comp and Harland newer style bearings have a lot more needles bearings in them with nothing but the outter race and trunion to keep them in place. Since I had all the little thin washers from my old Harland Sharp rockers, I used those when I installed the Comp trunion kit.
I see those washers as an additional safety measure in an attempt to keep those tiny needle bearings contained in the event of a bearing-case or trunion failure. Plus you won't have the retaining clip against the bearing shell itself.
.
Sorry for the delay guys, I was out in the field today.
I'm going to try to clear up the confusion.
Buckle your seat belts.
Below is a thread about the older caged bearings that harland sharp was using. As you will see the older caged bearings were causing scoring issues on the trunion itself.
https://ls1tech.com/forums/generatio...cs-inside.html
I myself was unlucky enough to purchase a set of Harland rebuild rockers with the older style caged bearings. I never had issues because I didn't have them on long enough.
Rather then send the rockers back to Harland sharp ( because I was kind of pissed at the time. ) I decided to buy the Comp trunion upgrades about 6 months ago. These were a brand new item from Comp at the time. I wonder if they are made by the same company.
When I received the kit I noticed they didn't have the washers like the Harland sharps did and still do. So basically the Comp vs Harland kits look identicle other then the lack of washers on the Comp kit.
Both the Comp and Harland newer style bearings have a lot more needles bearings in them with nothing but the outter race and trunion to keep them in place. Since I had all the little thin washers from my old Harland Sharp rockers, I used those when I installed the Comp trunion kit.
I see those washers as an additional safety measure in an attempt to keep those tiny needle bearings contained in the event of a bearing-case or trunion failure. Plus you won't have the retaining clip against the bearing shell itself.
.
04-21-2010, 12:03 AM
#39
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So comp is lying and they have to be called out because a true "roller bearing" as they state they use will never be open like this. This comes from am man that has had his nose to the use of bearings for the last 38 years my dad. I contacted him because he is the closest professional I know in this area and I wanted to be right not misinform. He informed me that what is on the other thread is an encased needle bearing not a roller bearing in any way shape or form.
This is a fairly new product from Comp. I think it's just a lack of understanding or perhaps ignorance on thier part. They should be made aware. They need to cross the " t "s and dot the " i "s on this matter.
I've had mine on for about six months... so far so good.
I do have a mild cam and plus I don't drive to often or real hard.
If someone revs hard and fast all the time, that might be a different.
In my case, I think they should be ok.
.
04-21-2010, 12:04 AM
#40
No need to throw Comp under the bus on the wording. A needle bearing IS a roller bearing. That would be like saying a ball bearing isn't a roller bearing. They are both roller bearings, just different types. This type of bearing just uses the trunion as the inner race. Just like a roller cam bearing.... its needle bearings also....