Interesting The Clevite 77 CB-1453AL are bimetal aluminum. the Sealed power
ones 4-4175CP that Napa appears to consider equivalent because they sticker
them with the clevite part number are tri metal copper lead with a plating of
some sort.
Bob
----- Original Message -----
From: Ray Ayala
To: Bob Bundy
Cc: miatapower@miatapower.net
Sent: Sunday, August 03, 2008 5:46 PM
Subject: Re: Dana Clevite vs. Federal Mogul Sealed Power rod bearings?
I prefer the harder aluminum alloy for high boost motors and the softer
aluminum for low boost or NA with high compression or other high risk of knock.
----- Original Message -----
From: Bob Bundy
To: Ray Ayala
Cc: miatapower@miatapower.net
Sent: Sunday, August 03, 2008 5:29 PM
Subject: Re: Dana Clevite vs. Federal Mogul Sealed Power rod bearings?
Any opinion on what I should do for rod bearings? should I just put the
Sealed Power bearings in and forget about it? originally Napa wanted to sell me
ACL bearings I asked for Clevite. There all inexpensive compared to the King
ones.
The ACL is listed as there Race series witch uses a lead alloy both Clevite
and Sealed Power are aluminum/tin as near as I can tell. ACL also has an
aluminum/tin line but they rate it as having a much lower load capacity and it
is more made out of that material to be environmentally friendly than be
better. I'm thinking ACL race bearings are best choice. Made in Australia I
believe.
Bob
----- Original Message -----
From: Ray Ayala
To: Bob Bundy
Sent: Sunday, August 03, 2008 2:22 PM
Subject: Re: Dana Clevite vs. Federal Mogul Sealed Power rod bearings?
Even when the oil film performs properly it still passes the compression
load on to the bearing and soft bearing materials will still extrude.
----- Original Message -----
From: Bob Bundy
To: Ray Ayala
Sent: Sunday, August 03, 2008 12:46 PM
Subject: Re: Dana Clevite vs. Federal Mogul Sealed Power rod bearings?
The bearing that failed looked like it was torn by the oil hole in the
crank journal. the rod was still fairly tight on the crank but the middle 1/3
of the bearing was gouged away. Seems like high rpm would crate tremendous
loads like high torque but I don't know what happens to the oil film
lubrication changes with RPM. Twice with this motor I broke the transmission at
5000 to 5500 rpm. full throttle full torque to sudden zero resistance I have no
Idea what the rpms hit when it does that. People said it let out smoke when it
did it though.
Bob
----- Original Message -----
From: Ray Ayala
To: Bob Bundy ; miatapower@miatapower.net
Sent: Sunday, August 03, 2008 9:10 AM
Subject: Re: Dana Clevite vs. Federal Mogul Sealed Power rod bearings?
The soft material bearings are not particularly suited to high-torque
(boosted or diesel) motors because the soft material will extrude out from
between the journal and the shell. And it can also extrude into the oil holes
in the crank and plug them up.
----- Original Message -----
From: Bob Bundy
To: miatapower@miatapower.net ; Ray Ayala
Sent: Sunday, August 03, 2008 12:19 AM
Subject: Re: Dana Clevite vs. Federal Mogul Sealed Power rod
bearings?
I think with the Timken wheel bearings it was a material issue. 8
identical bearings on a GTX two per corner I replaced them all with Timken
didn't look at them other than Timken was stamped on them I had two failures
and I got to looking closer. The two that failed on different corners were
stamped Timken Mexico. Two were stamped Timken Australia and the other 4 were
stamped Timken Japan. They all came out of boxes labeled Timken USA but its
really getting so nothing gets made in the USA any more. The GTX is notorious
for killing wheel bearings and just about everybody who has put in a Chinese
bearing has had infant mortality as well. I think the German ones do well.
The bearings that FM puts in are King which cost 3 times as much
are made using a single layer of proprietary bearing material on the steel
backing rather than two separate layers.They look like there machined inside
and out to really high tolerance. I think the material is softer and thicker
and will tolerate impurities a little better and be less likely to damage
journals. There like $89 for a set of 4 bearings. The Cleveite mains I have
are also machined looking inside and out but the machining on the back side
doesn't look like it was done with tools of as much precision as the King ones.
The Federal Mogul ones look like the final coating on the bearing surfaces was
sprayed on and not machined afterward to me the back side looks as stamped.
I only have 1 rod bearing that looks bad I just don't want to have
any issues because of using this bearing in a motor that is putting out over 3
times stock.
Bob
----- Original Message -----
From: Ray Ayala
To: Bob Bundy ; miatapower@miatapower.net
Sent: Saturday, August 02, 2008 8:10 PM
Subject: Re: Dana Clevite vs. Federal Mogul Sealed Power rod
bearings?
Ball & roller bearings have different kinds of problems than
half-shell bearings. The cheap ones have one less ball or roller (in the same
cage space) than the good ones. That reduces their life expectancy by more
than 50% because of the geometry involved. The ball or roller surfaces crumble
prematurely. With main & rod bearings it's more a matter of the material used
and the skill of the assembler in setting up the clearances.
----- Original Message -----
From: Bob Bundy
To: miatapower@miatapower.net
Sent: Saturday, August 02, 2008 3:08 PM
Subject: Dana Clevite vs. Federal Mogul Sealed Power rod
bearings?
I ordered Clevite rod bearings from Napa. what I got was a box
of sealed power Federal Mogul bearings with a "Napa Number" sticker over the
part number that is the Clevite part number.
Should I be concerned about this?
They say made in Mexico, where as the box of Clevite main
bearings say made in Japan.
My previous experience with wheel bearings made in Mexico was
not good. Timken wheel bearings of the same part number some made in Japan some
in Australia but the ones made in Mexico always died an early death on the 323
as did any bearings that come from China.
Bob
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