[TR] speedometer calibration

[Carl TR]

Thanks Bob - very useful

Just to see what to expect...   I followed the 'how to calculate' 
instructions.

My Dunlop SP20 A/S (165/[80/]15) = 25.39 calculated diameter and I measured 
it at 25.5.  The tire is no longer available so I couldn't find 
manufacturer's data.   TPM (loaded) would be 815.7-819.2  depending on which 
number I use.  Given the way I measured it, the calculated diameter is 
probably closer to actual.

@819.2 Theoretical calibration = 1213.  I have a 1216 speedometer (original 
to the car) so by my calculations for every 1000 miles (on the speedometer) 
I drive it would actually be 1002.4
(or would it be 997.6)

I can live with either and unless actual is way off from the calculated - no 
need to have the speedometer recalibrated.

Now to get the car on the road and see....

It should be back from the painter next week.  I am working on the seats, 
dash & cappings this weekend.

Next weekend - all of the little bits start going back on the car.... 
finishing up the wiring install as I go.

Carl
1961 TR3A BRG/Tan
TS81802LO -
I can almost taste the first drive...


----- Original Message ----- 
From: "Bob Danielson" <75tr6 at tr6.danielsonfamily.org>
To: "Alexander Delis" <ols at bcdef.net>; "Triumph List" 
<triumphs at autox.team.net>
Sent: Friday, October 22, 2010 11:37 PM
Subject: Re: [TR] speedometer calibration


> The  whole process is outlined on my site 
> http://tr6.danielsonfamily.org/SpeedometerCalibration.htm  and if you're 
> smart you'll send the speedo and cable (most cables aren't within spec) 
> off to Morris at West Valley Instrument. That's who the 6-Pack guys use 
> and who Moss recommends.
>
> Bob Danielson