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Guest Message by DevFuse

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Dialing in an aftermarket tacho....

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#1 jono


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  • Southern Hemisphere - AUS

Posted 19 October 2017 - 02:13 AM

I recently discovered after an engine swap that my tacho was reading a bit too high. The 1400 idle did not sound or feel like 1400 and the power coming on at 6000rpm was pretty wicked up to 8000rpm

A chat with one of the company's tech guys explained there can be a few factors to cause a tacho to tell fibs.

I was told an inline resistor between coil and tacho may fix it, so I hooked up my little resistor wheel to the tacho and mounted up my old L Series tacho to the dash top on its own as I had pulled it from the gauge set.

Took it for a run, and sat about revving it like a tosser a and in no time at all my after market tacho was calibrated to match the ea82 tacho with a 6800 Ohm resistor inline

Never heard of this process before but was pretty simple to resolve. And cheap, like was it eight resistors I had to buy for total cost of 55 cents!

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