greenmachine Posted April 2, 2012 Share #1 Posted April 2, 2012 I have a 1971 240Z, stock and original L24 with 1983 280ZX dizzy, E12-80 module, and MSD Blaster 2 coil, and no ballast resstor. I am installing a later model 3 wire tach. Do I need resistor inline with the wire from the coil? If so, what ohm/amperage is needed?I appreciate any and all advice! Link to comment Share on other sites More sharing options...
5thhorsemann Posted April 2, 2012 Share #2 Posted April 2, 2012 I have a 4 wire early tach, wanna trade? Link to comment Share on other sites More sharing options...
zKars Posted April 2, 2012 Share #3 Posted April 2, 2012 (edited) The inline resistor on the 75-78 280z's between the trigger terminal on the 3 wire tach and the (-) side of the coil is a 2200 ohm resistor (2.2K). 1/2 watt size should be plenty. I am using that resistor with my E12-80 module and that same tach and it works fine. Edited April 2, 2012 by zKars Link to comment Share on other sites More sharing options...
greenmachine Posted April 2, 2012 Author Share #4 Posted April 2, 2012 From what I have heard that tach will not work with the ZX ignition. Thanks anyway! Link to comment Share on other sites More sharing options...
greenmachine Posted April 2, 2012 Author Share #5 Posted April 2, 2012 Thanks! Glad to hear it works with your setup. Link to comment Share on other sites More sharing options...
olympianZ
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