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By the way, you can have up to four channels of "tacho" drive, so you could very easily install two tachos and have fully redundant circuitry for them, except the ECU itself, of course.

Another thing that you'll probably want, just for safety sake in case of a bug of glitch, is a reset button on the dash. This will allow the ECU to start fresh no matter what happens to the software (except broken tuning data, though I try to protect against that anyway).

Fred.

More sensor data,
This all relates to the same sensor, only different Housing

More sensordata Bosch and American zetler.
Did use the American Zetler TS502F3470RC (duo-sensor) but the temp went out of range on the aircooled cillinderhead.
So used the one mentioned in the earlier post on the cillinderhead and kept the little one as airtemp sensor.