At 08:21 AM 3/20/99 -0800, you wrote:
>JIm,
>
>I may well have missed something in this thread, or am just plain confused,
>but I had the impression that the need to re-calibrate the speedo/odo was
>somehow tied to your installing the new transmission. Thanks for describing
>your calibration procedure. I need to do this with my speedometer too; it
>reads about 10% fast, but I think my odometer reads about 10% slow. If I
>run through the simple math, assuming your speedo/odo is supposed to have
>an input of 980 revolutions per mile, then at 60 mph you multiply by 60 to
>give revs/hr and divide by 60 to give revs/min, so you need to run the
>drill press at 980 rpm and calibrate the speedo to give 60 mph and so forth
>for the other speeds. Is this correct, and is this the procedure you use to
>accurately calibrate the speedo?
Bob,
I have a 15 speed drill press. To make it work for a
speedometer drive I have to twist one drive belt to run the
spindle backwards. I calibrate the speedometer, based on the
drill press speeds that are available. It may not necessarly be
at 980 rpm. It has been a couple of years since I did this the
last time and of course, I don't have the numbers available.
My Tiger II speedometer is labled 1020 on the face in any case.
By the way, I use and old speedometer cable/housing between
the drill press and the speedometer.
James Barrett Tiger II 351C and others
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