David Jenkins
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| posted on 6/6/06 at 07:45 AM |
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Speedo sender options
I've decided that I need to fit a conventional speedo sensor instead of the smart-arse one that I made myself - it's no longer working,
could possibly be fixed, but it's totally inaccessible! It's an engine- & gearbox-out job to get at it...  .
I have 2 choices - the standard "magnets and a sensor" jobbie, or a hall-effect motion sensor.
What experiences have people had with either of these?
With the first sort, how close does the sensor have to be to the arc of the magnets?
With the second sort, how close does the sensor have to be to the propshaft knuckle to work properly?
Any other things I need to know?
David
P.S. It's a CAI/Smiths electronic speedo.
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Syd Bridge
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| posted on 6/6/06 at 08:28 AM |
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When I've done this setup with VDO speedo and vdo hall sender, I've got a short cable made up, by Speedy Cables, with the transmission
fitting at one end and the sensor fitting at the other.
You can then make the cable as long as you like, and put the sensor where it is easily accessable.
Not the cheapest way, but certainly the most sensible in the long term. Well, to me anyway. 
Cheers,
Syd.
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David Jenkins
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| posted on 6/6/06 at 08:31 AM |
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I don't think that would work for me - the speedo cable oulet is 50mm from the nearest panel!
I was thinking about the other kind of hall-effect sender, where the end is close to a propshaft knuckle joint where it can sense the metal bits
flying past.
David
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tks
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| posted on 6/6/06 at 08:44 AM |
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i used a siemens sensor
it was a 8mm one M16 threaded for industiral use!
i have builtint electronics sow it gives a nice 12volts signal if a bolt is there.
i just would make sure you can adjust the Smith sender right? does it has adjustments? what is the minimum bolts you need to count? what is the
maximum?
etc..
then you could search the best place to mount and also know the best sensor?
Tks
The above comments are always meant to be from the above persons perspective.
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