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Posted by: 914Greg Dec 1 2019, 05:06 PM

I have bought a roller without an engine wiring harness, it was a 4 that will be converted to a 6 with MSD and built in alt regulator, would it be just as easy to start from scratch with a harness than mod an old one?

Posted by: mb911 Dec 1 2019, 05:41 PM

Are you speaking of the engine compartment chassis harness? Or an engine harness which is part of the engine..

Posted by: Rosie Dec 1 2019, 08:30 PM

The harness that would go from the 12 pin connector on the relay/fuse panel.

Posted by: Mikey914 Dec 2 2019, 12:05 AM

I have the ignition harness you are referring in several variations as well as the FI one if you need it.

Posted by: IronHillRestorations Dec 2 2019, 07:00 AM

If you are looking for an engine harness for a 6 conversion, I can make one for you. It'll be a few months before I'm back in action, but I've done several for 6 conversions with MSD

Posted by: Mark Henry Dec 2 2019, 10:40 AM

Is it for a /4 or a /6? Carbs or FI?
Do you still have the relay board or has it been removed?

Posted by: IronHillRestorations Dec 2 2019, 12:25 PM

The OP says "will be converted to 6"

Posted by: Mark Henry Dec 2 2019, 02:29 PM

Sorry thought it said "was".

You will have to decide on several things
- to keep the relay board or delete it.
-where you plan to mount the MSD box.
-where you're mounting the fuel pump.
-what extra gauges you will run and how you want to run the wiring.

My engine harness I deleted the relay board and made it a quick conect to the main harness using the proper connector, but I still have a couple connections on the right side where I mounted my regulator and MSD. My MSD I did a stealth install in the stock location by modifying a /6 CDI mount. Then I still have a secondary harness for some of my gauges, again with a quick disconnect.
Using quick disconnect(s) my harnesses stay on the engine for easy R&R of the engine.

Taking the extra time sorting and planning of where everything goes will make for a much cleaner cable harness install.

If you're not that great with wiring and for the proper connectors Perry is you're best bet for getting a clean harness that is custom built to your needs.

Posted by: 914Greg Dec 2 2019, 04:01 PM

Thanks for all the assistance and advice guys, when I get the car shipped I will work out the best way to go.
I'm good with wiring and have just finished reworking a harness on a 2.7 in a 911 from FI to carbs, and msd. I thought i might just start by getting a couple of multi pin connectors but i dont see them listed in the Porsche parts catalogue, are they available anywhere.

Posted by: Tom Dec 2 2019, 05:57 PM

I modified an existing harness for a 3.0 several years ago. The 12 pin connector was sourced by the owner if I remember right and I seem to remember something about Mercedes using the same connectors. His was using carbs. We called Jerry Woods in California to be sure about the hookup with MSD. Nice fellow and very helpful. I kind of dropped out of 914 things after selling my 76 2.0 and haven't kept in touch with the guy I did the harness mods for. I never heard from him either, but his car is running so I guess all was well. I will add a wiring diagram for your use if you want it. I used a couple of Weather Tech connectors to keep everything with the MSD connections water tight.
Hope this can be some help,
Tom


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Posted by: Mikey914 Dec 2 2019, 06:13 PM

We make all the connectors, so if you have a diagram you want to have made, we can do it.
Mark

Posted by: 914Greg Dec 3 2019, 04:04 PM

Thanks again for all for the help and especially the wiring diagran Tom, just looking at how the relay board works and what i need to run i will most likely just bypass it but will make my final decision after the car arrives and i can understand it all more clearly.