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OD speedometer requirement

To: spitfires@autox.team.net
Subject: OD speedometer requirement
From: Dale M Osterndorf <osternd@juno.com>
Date: Wed, 2 Jun 2004 08:47:19 -0400
I'm looking to soon install a J-type od in my '78 Spitfire and was
wondering if the od requires a different ratio speedometer.  I know I can
get the speedo recalibrated, but I would rather have the correct one for
it.  Could someone please tell me if this is the case, and if so what is
the ratio number on the speedometer (I believe the standard is a 1000)

TIA

Dale O
'78 Spitfire
'76 TR6





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