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Re: Speedometer

To: "MG List" <>
Subject: Re: Speedometer
From: Max Heim <>
Date: Thu, 12 Aug 1999 10:07:51 -0700
There is a table showing this sequence on Skye's website, The MGB 
Experience, at:

<> had this to say:

>They did not have different speedos for the o/d cars.  All cars I've seen 
>- 74) used the 1280 series speedo.  In 1975, the o/d cars went to 1000 tpm 
>(turns per minute) due to the slight changes in the o/d gearing.  I suspect 
>the change in o/d gearing was due to the fact that the plastic gears on the 
>1280 units wore out fairly quickly.    But, 1975 - 1976 cars (non-o/d) used 
>the 1280.  And I have seen 1975 with 1280 and o/d.  There was some weird 
>stuff going on in 75 & 76.  It all depends upon the o/d unit.  Typically, 
>black label units were 1280 and blue label units were 1000.  From 1977 up, 
>all cars (non-o/d & o/d) used 1000 tpm.  Make sense?  
>Eric Swanger
>So many cars, so little time


Max Heim
'66 MGB GHN3L76149
If you're near Mountain View, CA,
it's the red one with the silver bootlid.

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