JoshCarz Posted May 13, 2012 Share Posted May 13, 2012 I just recently installed a 350 into my 240z. I'm stuck on connection the tach. the JTR manual states that the tach wire will be the black with white stripe without the protective cover but both my black and white striped wires don't have any covering. They also both seem to output 12v when the key is on. Has anyone ran into something like this? Any help would be greatly appreciated. Quote Link to comment Share on other sites More sharing options...
beermanpete Posted May 13, 2012 Share Posted May 13, 2012 The tach on the early Zs is connected to the positive side of the ignition. The black/white wire runs through the tach. If you are using points type ignition with your 350 it should work. Connect the black/white wire to the positive side of the coil. The RPM will be off due to the 8 cyl. vs 6 cyl. There is a calibration adjustment on the back of the tach that should have enough range to allow your to calibrate the tach properly. If you are using electronic ignition it might not work in which case you will need to get an aftermarket tach. Quote Link to comment Share on other sites More sharing options...
Miles Posted May 13, 2012 Share Posted May 13, 2012 You could try tracing the wire from the back of the tach to the engine bay with a volt meter or test light. Quote Link to comment Share on other sites More sharing options...
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