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Tach-wire BMW E30
Posted: Fri Mar 03, 2006 2:53 am
by Vezzel 309 GTI16
We have MegaSquirted (2.2 with Xtra-code) a BMW E30 2,7, but the original tachometer got its signal from the now removed Motronic box.
Can i just hook the tachometer directly to the negative side of the ignition coil?
Posted: Sun Mar 05, 2006 6:49 am
by darki325i
no, use tacho output from MSnSE MT 2.25
Posted: Sun Mar 05, 2006 11:05 am
by mops
i got the same issue...
what tacho output ? which pin on ms connector ? can you be more specific ? can i connect it directly or do I need to wire it through resistor/diode ?
Posted: Sun Mar 05, 2006 4:53 pm
by thedge
Posted: Sun Mar 05, 2006 5:12 pm
by mops
easy for you to say.
I run MS2, so i dont have tacho pin out (AFAIK)
basically i need to know what kind of signal e30 tacho needs. is it +ve every TDC or every single crank revolution or what.... or is it getting grounded or d'oh! ?