Re: GPS Speedometer
Posted: Fri Jun 11, 2021 11:10 pm
gjz30075 wrote:1owner, unfortunately those details I don't know. I simply brought *a* speedometer that has the same
input size as the one installed and the Speedbox to a local speedometer repair place with the required
speedometer cable length I needed and told them to make a cable to fit. As I recall, whatever size that
was required for the speedo end, also fit the Speedbox end. They, of course, also fit the necessary
nuts for tightening the sheath to their respective ends,ie, speedo and Speedbox. Nothing was out of the ordinary.
So, I have ordered the Speedhut Speedbox unit without cable. Speedhut confirmed that all that was needed for their unit to work in the Elan was a custom cable.
Custom cable ordered from Vintage British Cables (http://www.vintagebritishcables.com) as follows:
End 1: into the SpeedBox. 7/8"x18 female nut with 0.105 square end on the cable. This is standard American Ford specs.
End 2: into the original Smiths mechanical speedometer. 12mm nut with 0.125 square end. This is standard specs for the Smiths gauge in the Elan.
Note: the different size square ends.
Length: to suit. In my case I specified 35". I am placing the unit (as with previous unit) just under the bonnet skid plate on the left side (LHD car). Completely hidden and just wedges in. The new unit is even smaller than the old one. Also seems to have a faster sampling rate (10 Hz vs 5 Hz) and purported to be quieter, although I can't hear anything above the engine noise anyway.
Vintage British Cables (no affiliation) uses original Smiths tooling and IMHO provide the most robust and authentic cables. As well as accommodating custom needs as in this case. Turnaround, 2 days from order.