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Registered
Join Date: Sep 2008
Location: Rio Rancho, New Mexico
Posts: 200
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The 911S tach gets its signal from the distributor.
It is just expedient to connect the tach wire to the same CD post (pin C) as the distributor input to the CD box.
If you are using an ignition system other than a CD, connect the tach to the output distributor wire. Pulses to ground will control the tach.
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Doug
Was 2.7racer.
'76, 2.7 w/Webers, JE pistons, Solex cams. Elephant bushings front & rear, 23mm & 28mm torsion bars, big brakes front & rear, Pertronix. Track car.
'85 3.2 stock, Orient red, comfy street car.
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