I am worried about the cam bearing situation, since I'm going to run a TA210S. I don't want to have any problems with this motor, so I'm trying to get the best of everything. I read something recently on pre-coated bearings? Who sells those? Do the roller rockers take any load off of the cam bearings, as compared to a normal rocker?
You should have no problems with the grooved bearings, coated is also fine. I have been coating bearings since 1993. Make sure your bearings are clocked correctly, If they are the doulble grooved double holed ones, set the one hole at anywhere from 3 to 4 o'clock and the second will be from 7 to 8 o'clock. Make sure the cam spins easily in the bearings once installed. I believe TA sells already coated brgs, or you can have them coated elswhere, If I were you, I'd probably just buy them coated form TA. You have to be careful about resticting oil to the lifters, remember, the passenger side of the engine is also the main oil galley that feeds the block, so any restriction on this side would be bad news. The bigger the rocker ratio, the greater the load will be on the cam lobes and bearings. A 1.65 rocker will put more load than a 1.55 ratio, this is simple physics here and lever action. Jim Burek P.A.E. ENTERPRISES
I just ordered the tefon coated bearings of t/a. i had install stock replacement one last year and they all when so hopefuly that fixes the problem...i'll post a picture of them when i get them i week from monday..
Incidently, the correct name for the coatings on the bearings is moly, not teflon. Teflon is for frying pans, not bearings. Just thought I'd clear that up.:grin: Jim Burek
I thought thats was wrong to but that is what dave at TA told me they were coated with but o'well Mike
Just a FYI, The TA1559-Teflon is in fact coated with a "black" teflon based coating. Moly coating is gray in color. Teflon coating is also used on machinery, like bed ways, bushings etc. We have a surface grinder in the shop that has teflon coated ways. The reason we are using teflon is for start up. The lack of oil at that time is one of the reasons for bearing failure. The teflon can carry higher loads and can run with no oil for a short time during start up if needed. Have more questions feel free to give us a call. Mike
I ran the T/A coated bearings all last year. When I took MY motor apart for a look see they were in great shape Very little wear threw on the coating. I run a flat tappet with 150 LBS on the seats and close to 400 open. I think they have a great piece there held up very good.:TU:
I don't want to get into some big fight here but, all the information I have on coatings is that moly is used for engine parts, teflon is used in industrial machine applications. SO far , all the coating companies I have talked to say their dry film lubricants are moly based, not teflon based. Some of these coatings are also in fact a black color, there are different pigments that can be added to the coatings. Teflon does not have the high carrying load capability as moly. In speaking with coating manufacturers, they claim teflon is not something you want inside an engine. The moly based coatings will often dissapear with use, it does not mean the coating is no longer there, it's just down in the pores still doing it's job. I have been coatings parts since about 1994, while I don't claim to know all there is to know about the subject, I feel I do know quite a bit. So if the cam bearings are in fact teflon coated, that's fine, I just don't feel that teflon is the ideal product to do the job. I have used moly on the bearings in the past with great success. I am simply passing on information that I have and am not in anyway trying to bad mouth a product, such as the teflon? coated TA cam bearings. Jim Burek P.A.E. ENTERPRISES
I can see where a teflon coating would be diffrent in application than a teflon oil additive. There's lots of people out there that still say any coating is snake-oil too (by the way, I believe they work for added protection). It also seems to me that someone on the east coast used a teflon coated bearing a couple of years ago with good success. It came as a suggestion from Federal Mogul or someplace after melting out several regular coated bearings. That in mind, maybe the question should be this: Is there any place we can get more information on the use of teflon as a performance coating in engines?
You can go on line and look up any of the coating manufacturers and coaters for information, there are quite a few of them listed such as Tech line coatings, Swain and others. Teflon itself is an oil shedder, it's good for shedding oil. The following is a quote from a Swain tech on this exact question: "I guess we should just let the ignorance continue. There is so much mis-information and exaggerations about coatings in general that we will just let somebody sell a coated bearing with what would essentially be an oil shedding coating. Great idea!" The new pistons that are coming out with coatings are a moly derivative. I am definately a fan of coatings in engines, they do work, I have proved it and swear by them. Jim Burek P.A.E. ENTERPRISES
if you look at the bearings from duro bond the clearly state fluoropolymer coated cam bearings this is how they use there part number CHP 8 T small block chevy BP 9 T 455 Buick
You found more than me, Jim. I did do a look, including at Swain, and didn't find anything. Well, the internet is a BIG library to search through I guess... Thanks for the follow-up. Of course for dry-startup as Mike mentioned, as well as oil-shedding on a pressurized bearing might not be a problem since the wedge of oil between the bearing and journal is the issue once the engine is running. Anything wrong with that line of thinking?
AThat may very well be the bearing I was thinking about. May have been the person at the time happened to say "teflon", or I inferred it since that was before I had ever looked into coatings.
bearing no matter what coating they claim they have on them in my opion you can not go wrong on useing coated bearings in your engine if you can afored it. mike
i put bronz in my 455 after 2 sets of bearings 1 set from TA backgroved lasted 45 sec. on engine dyno the other set fron duro-bond teflon coated thay are black in color thay lasted 156 miles Bronz is forever peter
