right ive confused my self this doesnt make any sense at all the instructions say the speedo can work of hall effect sensor with the formula poles on sensor x cable drive revs per mile = calibration number also just found out that my speedo can work off ecu which the formula is number of pulses per mile = calibration number

so i guess if ive got 26 puleses per rev if i work out how manys rev per mile i have the answer?

the revs per mile of my tyres are 921 thats with 195/45/15

so 921x26 = 23946

i know im using the sensor on the gearbox but my gearbox doesnt have cable revs does it so im just assuming that using the ecu mode will work as i know the pulses per mile?

fuck im confused help please :'(