Hey guys,
Im doing a full engine overhaul on a 911E 2.0 from 1969 and moving towards an electrical fuel injected setup instead of a mechanical setup.
But now I come to the task to get the tacho working again, with no luck so far.
I found this post on the topic:
https://forums.pelicanparts.com/porsche-911-technical-forum/280714-tachometer-compatibility-chart.html
So I have found this diagram:
all the hardware is removed so only the wire to the tacho is left. And according to the post the tacho want a "11 volt square wave.". I was using a Highside driver to make a 50% duty cycle with 12V. But with no luck.
I was hoping someone here as some tips on how to get the tacho going.