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General Diesel Tachometer fitting to a 200 TDI with alternator

Khriss

Khriss

Accelerating Away
It can be done but need a cleverer man than I, put a 200 TDI in my Series but thinking of a tacho to give ideas on gearing. Tacho clocks are inexpensive but how to get a pulse to them 🤔 and calibrate ? I have heard a lead off the alternator or a magnetic sensor on flywheel but anyone done a clever fix ? Thanks in advance.
 
Khriss said:
It can be done but need a cleverer man than I, put a 200 TDI in my Series but thinking of a tacho to give ideas on gearing. Tacho clocks are inexpensive but how to get a pulse to them 🤔 and calibrate ? I have heard a lead off the alternator or a magnetic sensor on flywheel but anyone done a clever fix ? Thanks in advance.
Click to expand...
Most modern alternators have a ‘W’ terminal which can feed pulses to a tacho.
Calibration isnt rocket surgery if you take your time.
 
I do have a Lazer Tachometer to get started with. But W terminal ? Is that the smaller one of the three ?
mikeau said:
Most modern alternators have a ‘W’ terminal which can feed pulses to a tacho.
Calibration isnt rocket surgery if you take your time.
Click to expand...
 
Depends which alternator you have, but most of them are marked 'W'.

Yours is most likely an A127...

1800737107_LucasA127Alternator.jpg.2ebfd023da965dae28ff9fa854572f82.jpg


Post up a pic if you arent sure...
 
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