Hi guys,
I'm trying to replicate Funola's DIY tach on my 1983 240D with Manual tranny.
DIY tach for 240D w EGR- easy!
I am assuming my 83 has EGR (gotta check that)
Funola used a tach/clock out of a same model year (83) 300D with automatic.
He was able to very simply swap in the tach and run a signal wire from the EGR controller.
I have found a source for either an 82 or an 84 tach.
However, in testing the tachs, here's what he said:
The calibration appears to be quite different between the two model years.
Results:
1982 5000 rpm at ~80 Hz
1984 4500 rpm at ~10 kHz (seems to have different pickup signal vs. 1982)
I suppose that I should simply pick up an oscilloscope and figure out what signal is coming from the EGR controller, but do you guys happen to know which of the tachs I should get?
Thanks much,
PE
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83 240D - 4 speed manual - Manilla Beige
189K miles, Tachometer mod, cool wooden shift knob from PeachParts, CocoMats, Original factory paint, manual windows, manual sunroof. Starting to add AudioWrap to this car too!