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Smiths Electronic Speedo Accuracy?

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#1 chuee

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Posted 01 March 2024 - 06:34 PM

How accurate can the new retro SMith's  speedos be calabrated,I wonder?

 

Can it take into account  both the speedo drive,and gear box ratio? AND;

Can it be fine adjusted beyond that?

And how accurate can it be set?

 

OR ELSE,

 

Is there a sure and decent way to get an electronic speed sensor  fitted?

 

Cheers.

John


Edited by chuee, 01 March 2024 - 06:34 PM.


#2 Midas Mk1

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Posted 01 March 2024 - 07:11 PM

Haltech gps sender unit, highly recommend.

#3 PoolGuy

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Posted 01 March 2024 - 07:20 PM

Mine reads 1mph (I could set it to read exactly just as easily) over from 20-90mph, very easy to adjust to whatever you want. I used a bespoke sender from https://sailesmarket...x4h-transducer/



#4 Spider

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Posted 01 March 2024 - 07:37 PM

They can be set very accurate, but keep in mind, there's always the variability of tyres and road conditions if a wheel driven pick-up of what ever type is used. While a GPS pick up can be more accurate, these too will be out if there's overhead obstructions, like building or trees, even on grades, if the unit can 'see' enough satellites, it will under read. They are also utterly useless in a tunnel, which is why they aren't legal in all countries. Personally, while it has the above mentioned short comings, I prefer a wheel driven pick-up (via the gearbox, from the normal speedo drive). If it was good enough and legal for the car as produced, then it's much less likely to get you in trouble.

While I haven't tried that pick-up of Poolguy's the issue I have found over the years with such a pick-up is there doesn't seem to be anything decent and medium term (let alone long term) reliable for the Mini. I've give up in recent years and made my own. It reads down to 0.25 kph and is super accurate & so far, 100% reliable.

Another great feature of the electronic speedos is it's very easy to change their calibration say for a change of tyres, wheel sizes or final drive ratios.



#5 Cheeser

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Posted 01 March 2024 - 09:22 PM

This doesn’t really address the question being asked, but I use a cheap cycle computer in my old open car which can be accurately calibrated for gearing, tyre size etc and in my case the trip is very good substitute for the lack of a fuel gauge!! Also has clock, average speed, maximum speed etc which can be interesting.



#6 stoneface

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Posted 01 March 2024 - 10:55 PM

Post No. 10 might be of interest for possible pickup location

https://www.theminif...iring-question/


Edited by stoneface, 01 March 2024 - 11:01 PM.






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