[Mg-t] TC speedo in a TD

[Bob Donahue]

I took the TD for a spin today along with my GPS. The S461-1675 Jaeger (TC)
speedometer was spot-on. This makes me wonder if the proper S561-1600 (TD)
would have read too high!

By the way, my GPS claims a speed accuracy of 1/10 mph.

Bob Donahue (Still Stuck in the '50s)
Email - bobmgtd at comcast.net
Cars:       52 MGTD - #17639
               71 MGB - #GHN5UB254361
Member:  NEMGTR #11470
               NAMGBR # 7-3336
               Hoosier MGB Club
               Olde Octagons of Indiana

----- Original Message -----
From: "Bob Donahue" <bobmgtd at comcast.net>
To: <mgbob at juno.com>
Cc: <mg-t at autox.team.net>
Sent: Sunday, August 05, 2012 6:50 PM
Subject: Re: [Mg-t] TC speedo in a TD


>   I found a web page that said the TC speedo is S461-1675 and the TD is
> S561-1600. http://ttypes.org/ttt2/mg-tc-dash-instruments The page says the
> second number is the "cable turns per mile". To me, the extra 75 turns of
> the TC speedo means the miles and speed will read low by 4.7% in a TD.
> This
> is not a horrible error in my opinion. Heck, my B reads 5% high with the
> correct speedometer.
>
> I will take my GPS for a little ride and find out what the real error is.
> With the cost of these instruments, I can put up with a small error.
>
> Bob Donahue (Still Stuck in the '50s)
> Email - bobmgtd at comcast.net
> Cars:       52 MGTD - #17639
>               71 MGB - #GHN5UB254361
> Member:  NEMGTR #11470
>               NAMGBR # 7-3336
>               Hoosier MGB Club
>               Olde Octagons of Indiana