There has been so much talk about the superiority of trimetal bearings, and
I agree, but are there any actually available for the TR3 - 4 from any
vendor? Who? Maybe I missed that detail in the messages.........
At 01:32 AM 4/2/2004, Guyots3@wmconnect.com wrote:
>In a message dated 4/1/04 11:15:08 AM Pacific Standard Time,
>lang@isis.mit.edu writes:
>
> > The Glaciers that you can buy from TRF and Moss are in fact Al bearing
> > material. The design of these bearings is the same as the old ones, but
> > the babitting is different (Al) and more "modern". The hard core racers do
> > not like these bearings because they will fail rapidly if there are oiling
> > problems (even short duration events) and they wind up siezing to the
> > crankshaft.
>
>Bob, Bill, John et al,
>
>Re the Clevite bearings,
>
>I spent some time today at work, studying the 2002 telephone book sized
>Clevite catalog(ue).
>
>They spend two full pages therein, extolling the virtues of their much
>vaunted Clevite 77 TriMetal bearings:
>
>eg: Clevite 77 TriMetal engine bearings outperform & outlast all others.
>Designed specifically for the aftermarket engine rebuilders. TriMetal
>bearings are
>a rare combination of strength & flexibility. A sturdy steel layer provides
>maximum support. then, a copper/lead alloy provides strength as well as
>durability for extended life, even under harsh conditions. Finally a
>Babbitt layer
>provides the embedability and conformability that no Bi-Metal bearing can
>achieve. With Clevite 77 engine bearings, it all adds up to a superior
>performance.
>It takes three layers to be number one.
>
>They further invite question to be directed to them at Clevite Engine Parts,
>(Dana Corporation), 1350 Eisenhower Place, Ann Arbor, MI 48108-3388.
>
>Website Address : www.engineparts.com
>
>I then looked up Triumph in their catalog, (and ignoring their listing for a
>mysterious 1998cc 4 cylinder 2.0 Liter Engine), I note that for the 1998cc 6
>cylinder 2.0 Liter AND the 2498cc 6 cylinder 2.5 Liter engine, they list the
>following:
>
>Main Bearing Set: # MS-1112P [ALUMINUM AL-3]
>
>and
>
>Con-Rod Bearing Sets # CB-982P [ALUMINUM AL-3] in std, 10, 20 and 30 thou
>oversized.
>
>The Thrust Washer Set is # TW-229S [material unspecified]
>
>CSK list prices are $111.99 for the Main Bearings, $15.99 for the Con Rod
>Bearings and $21.99 for the Thrust Washers.
>
>Note that these are full list prices and sizeable discounts are available via
>partsamerica.com and also by competitive price matching against other parts
>houses.
>
>It seems more than a tad hypocritical of Clevite to extoll the virtures of
>their own TriMetal bearings and then only quote Bi-Metal Aluminum bearings
>for
>our Triumphs!
>
>I wonder what their reasoning is?
>
>Why do other makes get the TriMetal bearings but we do not?
>
>I suppose that the best we can do is to use High Quality Oil, such as
>Valvoline's Synpower, and perhaps a tried and tested friction modifier,
>(preferably
>without Teflon and/or Molybendum), change it regularly, and use really
>good oil
>& air filters such as K&N.
>
>Anyhow those are my findings.
>
>Best Regard 2 All.
>
>Leon
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