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anyone ever have any issues with a autometer pro comp recall tach and a msd hei pro billet distributer working together? my tach reads fine untill im racing and its dancing all over the place while im racing, i can see it out of the corner of my eye down the straightaways. plus it will read like 6000 rpm for a second while cranking engine to start, so then when u hit the recall button, it will read 6000 or 7000 or whatever it jumped to while cranking. it said 8000 rpm after a race, and i know it wasnt spinning that fast, i have a 7500 rev limit set in the dist. i do have the new style msd that doesnt have the dreaded dial rev, mine has the wire u ground to set it.
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Do you have an MSD ignition? Do you have your tach wire run right along with the MSD Ignition wiring? Do you have them grounded to the - side of the battery or just a screw/bolt to the metal of the chassis? -
no msd box, the pro billet hei has a internal module, and a ground eyelet, which is grounded to chassis. double checked dist ground, and tach ground, have less than a tenth of a volt for voltage drop to ground circuits from neg terminal at battery.Comment
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That tenth volt is that with it running under load or just the switch on?Comment
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