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HEI Conversion wiring hook up...

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Old Nov 16, 2004 | 08:56 PM
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Default HEI Conversion wiring hook up...

I am installing a 79 vintage HEI in a small block. I know that I need to hook up a 12 volt source and a ground to the connector at the cap. My question is what to do with the three wire pig tail connector comming from the base of the distributor. I think this was a ECU hook-up? Do I need to jumper any of these wires?

Thanks, Garson
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Old Nov 16, 2004 | 08:59 PM
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Originally Posted by Garson
I am installing a 79 vintage HEI in a small block. I know that I need to hook up a 12 volt source and a ground to the connector at the cap. My question is what to do with the three wire pig tail connector comming from the base of the distributor. I think this was a ECU hook-up? Do I need to jumper any of these wires?

Thanks, Garson
Those three wires should plug into the cap of the distributor, right behind where the 12 Volt+ and the tach hooks up.

For 12V+ you want to hook up to the ignition circuit. It should be a line that has 12 volt + when the key is in the on / run position and while the engine is cranking.

You don't have to hook up a ground.
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Old Nov 16, 2004 | 09:10 PM
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Seery you changed your image!
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Old Nov 16, 2004 | 10:57 PM
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From: eville in
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One wire ????

Last edited by comp; Nov 16, 2004 at 11:01 PM.
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Old Nov 17, 2004 | 12:11 AM
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Originally Posted by comp
One wire ????
Yep. HEI has the coil in the cap. The three wires from the distributor body (from the internal pickup) connect to the cap and into the coil. You only need to give it 12 V + to work, and hook up the tach if you want to see what's going on.

That's it.
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Old Nov 17, 2004 | 12:12 AM
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Originally Posted by SanDiegoPaul


Seery you changed your image!
Yeah, I will keep it for a while - I liked the movie. I will put the AZ flag back in a while.
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Old Nov 17, 2004 | 04:11 AM
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From: eville in
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Originally Posted by BSeery
Yep. HEI has the coil in the cap. The three wires from the distributor body (from the internal pickup) connect to the cap and into the coil. You only need to give it 12 V + to work, and hook up the tach if you want to see what's going on.

That's it.
that should help a few
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