[Fot] Center main support

[fubog1]

 The center main strap is often used on some high-revving engines, ie Spit & A-series, but I've never seen the need for it on the Tractor engine.If it's well balanced & not run at stupid RPM, the mains will last a long time.Glen
 
 
-----Original Message-----
From: Phil Gott via Fot <fot at autox.team.net>
To: Friends Of Triumph <fot at autox.team.net>
Sent: Fri, Nov 22, 2019 4:58 pm
Subject: [Fot] Center main support

Has anyone seen the need to add extra support to the center main on the TR wet sleeve engine? We have an engine that has a steel bridge cross-bolted underneath and supporting the center main cap. Is this needed? Just took 3 factory cranks to the machine shop and all three were bent about .002 in (.002 run out at center main when supported on first and last mains.) Two of these were raced, the third was removed from a tired street engine. note: None of these cranks came out of the engine with extra support at the center.
Curious as to the need for the extra support.
Thanks,
Phil Gott
114 TR4A

Sent from my iPhone
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