MSD offroad-6, MSD 8366 Distributor, Holley 950 ECU - Hot Rod Forum : Hotrodders Bulletin Board -- Hot Rod Forum

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Old 09-06-2004, 02:16 PM
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MSD offroad-6, MSD 8366 Distributor, Holley 950 ECU

The engine is a new GM 383 Crate motor.

Distributor is MSD 8366.

It has connections for two plugs, one is four wire, and that goes thru a cable, Holley Adapter 534-138, to the Holley 950 ECU. (700 CFM TBI).

The other plug on the distributor has, (I think) two wires. I don't know if I need to use this plug.

In the Holley 950 instruction manual, it shows that two-wire plug going to the MSD 6-series ignition white wire (points input) and a powered red wire.

The Holley instruction manual also shows the MSD 6-series violet and green wires not being used.

But if I understand it correctly the 8366 distributor uses a magnetic pickup and that should go to the violet and green wires on the ignition box.

Also on the schematic for the Holley 950 ECU it shows a plug called "IPU" which has Purple, White, and Green wire. The legend says the Purple is IPU (+), the White is Points Out, and the Green is IPU (-).

But it doesn't say anywhere in the instructions for the 950 ECU where that "IPU" plug is supposed to attache to.

It would make sense to me that the IPU plug on the Holley 950 ECU should go to the MSD 6-series ignition box, but it doesn't show it that way on the installation instructions.

If anyone can tell me what the 6 wires on the distrubutor (MSD 8366) specifically do, maybe I could figure this out. There are two plugs, one with 4 wires, one with 2 wires.

And also should I be using the white points trigger to the MSD 6-series ignition box, or should I use the Green and Violet(purple) magnetic trigger wires.

This is really giving me a headache. I live in Oklahoma, and the jeep is at my brother's in Arkansas, about an hour and a half away, so I don't have the parts with me to look at right now. I get over there on the weekends to work on it.


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