70GMC Posted April 16 Share Posted April 16 got a 91 superliner came with mechanical tach installed new engine no mechanical tach want to hook up electric tach need how to wire it is it a reduced voltage going to speed sensor ?or can I hook up to alternator? using mack electric tach have pigtail coming out of tach thanks Quote Link to comment https://www.bigmacktrucks.com/topic/75413-91-superliner-electronic-tach/ Share on other sites More sharing options...
Geoff Weeks Posted April 19 Share Posted April 19 The common electronic tachs I am familiar with use a mag pick-up on the flywheel that reacts to the ring gear teeth. They are not "powered" pick up. There are some that run off an ac tap on the alternator. If your engine doesn't have a cable drive, it should have a 3/4" x 16 tpi hole tapped into the bellhousing for a mag pick-up. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75413-91-superliner-electronic-tach/#findComment-574040 Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.