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Re: Speedo and Tach question
Speedhut sells a speedometer drive called a SpeedBox that takes either a GPS signal of input from a CAN bus to drive a stepper motor that turns a conventional speedo cable.
I have a transmission that doesn't have an electronic signal or a speedo gear drive, so I use the SpeedBox to drive my factory speedometer.
As for your tach for a magneto, Autometer makes a tach adapter that produces an electronic signal for a tach off of a magneto - Autometer part number 9118.
You can get your checkbook out and save yourself a lot of hassle with some Dakota Digital RTX gauges. The speedo is driven off of a signal generator that hooks to your transmission cable, but I think there's a GPS option too. I'd guess you'd still need the magneto adapter from Autometer to get the tach to work
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