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Smiths speedometer telemax- recalibration


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Posted

Afternoon all, 

I need to recalibrate my smiths speedometer, I've got a pre 2004 telemax type. 

I've measured that it does 69 inches  per full wheel rotation. You then somehow need to turn that figure into a number on the speedo, which i can access!

Instructions on caerbont automotive website are somewhat confusing (to me) 

Can anyone simplify the process for me. 

Posted

Hi Richard.

Does the below help at all? 

 

Screenshot_20250705_184518_Google.thumb.jpg.8c6cb098489fa1451e3b7d8fdbe8b95b.jpgScreenshot_20250705_184527_Google.thumb.jpg.e0cc14c88508154039af20325daea944.jpg

Very similar process to my raceline speedo. 

 

Gary.

 

 

Posted

Need a little bit more information.

Where is the sensor mounted .

How many pulses (bolt heads passing the sensor per wheel rotation)

Possibly diff ratio

 

 

Posted

Hi PK

Sensor is mounted on the drivers side wheel

bolt heads passing the sensor per wheel, i don't know - is it a case of just watching it? 

Dif I believe is standard 3.62

Posted
14 minutes ago, snowy892 said:

Hi PK

Sensor is mounted on the drivers side wheel

bolt heads passing the sensor per wheel, i don't know - is it a case of just watching it?  

Dif I believe is standard 3.62

Yes . it should be fairly obvious what passes near the sensor just need how many in one wheel rotation  

Posted

If it's pointing at the disc, it'll be four bolts per revolution. 

By my reckoning, your tyre turns 918.2 times per mile.

918.2 x 4 = 3672.8 or 3673.

The table shows the switch settings for 3672 which will be close enough. 

 

Screenshot_20250705_222548_Chrome.thumb.jpg.6c71bdcea91c4882c3bf0c6045ba3d75.jpg

 

Set the switches to the settings above for 3672 and follow the rest of the instructions. 

That should do it. 

Posted

Assuming the drivers side wheel you refer to is the front wheel?

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