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Re: GPS Speedometer

PostPosted: Fri Jun 26, 2020 1:07 pm
by My72Sprint
Reached out to Caerbont Automotive Instruments about Smiths speedometers availability.
https://www.smiths-instruments.co.uk/lotus
Received back:
SN6207-10 speedometer (mechanical, 980 turns per mile) - £211.11
SN6207-10CB speedometer (electronic, programmable) - £185.00
EMP34-1KIT inductive sender (M8 x 35mm) - £57.20
GPS01KIT GPS sender - £111.27

GPS for Smiths was new to me.
I’m going with electronic, programmable & GPS. Accurately unaffected by tire size & 5 speed conversion etc.
Tim

Re: GPS Speedometer

PostPosted: Fri Jun 26, 2020 2:33 pm
by gav
Tim

That’s interesting - I have the electronic programmable speedo and when I enquired about the GPS sender they said that whilst the two are compatible, they cant be switched between modes, they have to be reset each time.

Gavin

Re: GPS Speedometer

PostPosted: Fri Jun 26, 2020 4:34 pm
by My72Sprint
I not sure what "switched between modes" means from your post.
If I'm fixed with GPS only unable to use inductive sender no problem

My understanding electronic is programmable during manufacturer only.
They are working on user programable setting for odometer etc.

Tim

Re: GPS Speedometer

PostPosted: Fri Jun 26, 2020 4:48 pm
by gav
Hi Tim

I meant that you could have inductive or GPS but if you wanted to switch from one to the other, that could be done but the unit would need to be recalibrated each time. That said, once the calibration number is established it is simply a case of re setting the reference number each time.
I was looking for a switch on the dash that could change from GPS to inductive and back at will and this is what they said I couldn’t do.
I think I’m going to find a calibrated mile and set the inductive and leave it there.

Hope that makes sense

Thanks
Gavin

Re: GPS Speedometer

PostPosted: Fri Jun 26, 2020 5:34 pm
by My72Sprint
Got it now..
To your point they should allow GPS or inductive selection @ install.
Odometer total values should also be user changable.

They didn't have an avaliabliity date for upgraded software.
Tim

Re: GPS Speedometer

PostPosted: Sat Jun 27, 2020 9:47 pm
by wolfchen
I have tried to fit various GPS speedo units to my motorcycle and found a distressingly high failure rate on the cheap circuits used, almost always the vibration of road use destroys the circuit board when I most need it, Also GPS signal strength can be problem , I like an electronic rally style that drive of front wheel had better luck with these

Re: GPS Speedometer

PostPosted: Tue Jun 30, 2020 6:18 pm
by gav
While I have been sorting out the calibration of my speedo, I made a little bracket using the tonneau cover clips and am using a portable GPS unit. It works quite well there and hasn't rattled apart yet but that might be famous last words-

Re: GPS Speedometer

PostPosted: Fri Jul 10, 2020 4:04 pm
by My72Sprint
Received Smiths speedometer with GPS from Caerbont Automotive.

Elan is under restoration ...
I temp wired / plugged speedometer/GPS into a cigarette lighter port another vehicle.
Drove to a nearby radar speed check location and speedometer matched radar reported values.
Speedometer 40 MPH = 40mph radar display.

Tim