philUK Posted June 17, 2003 Share #1 Posted June 17, 2003 Just an idea - is the input signal to the tach / rev counter simply a 12v square wave? The reason I'm asking is because at present my tach is not attached, which is quite annoying! The Haltech E6K engine management system provides a 5v square wave from its tacho output (as far as I am aware), so I'm thinking it may just be possible to boost this signal and use the standard tacho?I have a 1971 240z btw, HS30-00829If not it looks like having to go the autometer route... Link to comment Share on other sites More sharing options...
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