I would rather no do it that way as your then fudging the tacho itself to read what you want, the tacho has a preload when it gets a voltage feed as you may be aware, although there is no actual signal from the ignitor or ecu it still gets a power source which causes it to shift the needle to a position being either marker 1 or 2, I have had to change this as my old n/a one does not work the same as the tt as the signal is from the ecu not the ignitor, and with it being a new engine it does seem to be idling higher than usual as i can tell from the engine note once the thermostat has opened at warm idle, im gonna get her tuned anyway so i dont want to fudge the reading as it were.
As i never saw the tickover before on this motor i just wanted to know where the rev counter sits when the ignition is turned on and the preload is activated, the engine must not be running though.
any helpers please