Paul2010
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| posted on 25/6/10 at 10:22 AM |
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Speedometer Help
I aquired this speedo with a box of parts with my part built car. Can anyone tell me anything about how it works. It say AST on the front. Any help on
wiring, do I need any other bits etc. Thanks
 
Rescued attachment speedo.JPG
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BenB
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| posted on 25/6/10 at 10:52 AM |
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Yup. It's the one I've got. It used to be sold by Rally designs as their "Racetech" one even though it's branded AST.
It uses a variable reluctance sensor which needs a ferrous trigger wheel.
It does have a little adjustment via the black dial on the back but basically requires a 833Hz trigger signal @ 100mph. I made up a trigger wheel (CNC
laser cut) which clamps under the rear Lobro bolts.
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coozer
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| posted on 25/6/10 at 10:52 AM |
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The clues on the back there.....
1972 V8 Jago
1980 Z750
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BenB
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| posted on 25/6/10 at 10:54 AM |
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Trigger wheel
Sensor mounted
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