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mark houghton mark houghton is offline
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Join Date: Jul 2008
Location: Central Washington State
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Originally Posted by A930Rocket View Post
I installed one in my car several years ago. Here's what I came up with:

I don't think there is any differnce between a 911 and a 930 install. I've done both and they were the same for me. I would get the compatible MSD blaster coil. The extreme or heavy duty one is encased in epoxy (IIRC) and can be mounted upside down.

I've installed mine in the passenger compartment and the engine bay (on the right rear firewall). Maybe the MSD6AL-2 is small and will fit the original CDI location better.

I've not had a problem with any of the rotors I've used with my MSD, but others have have. Removing the resistor and replacing with a copper wire seems to fix it for them.

MSD Installation Instructions On A Porsche 911

Here's some question and answer info I got from Steve Weiner who owns Rennsport Systems:

1- The large red wire goes to the battery. I used the Positive lug on the starter solenoid as it comes right from the battery
2- The large black wire goes to ground. I used the trans to body ground lug
3- The small orange wire goes to the Positive side of the coil
4- The small black wire goes to the Negative side of the coil
5- The small red wire goes to switched Pos
5- The white wire is used to trigger a MSD shift light
6- The violet wire connects to the violet wire to the shield
7- The green wire connects to the green wire to the center conductor

The violet & green wires conduct the trigger voltage to the MSD. This is phase sensitive and must be connected correctly otherwise the car will not start or run poorly.

I didn't want to cut any of my harness up, so I unplugged the wiring harness off the CD and connected my wires there (the ones from the distributor).

EDIT: Others have said they didn't need the tach adapter.

NOTES: In addition, to make the tach work correctly, the tach adapter is used and:
1- The red wire is to switched Pos.
2- The black wire is to ground.
3- The white wire goes to the tach output on the MSD unit itself.
4- The violet wire is run to the tach input (the purple and black wire by the CD unit).
That's one hell of a tutorial Rocket Man!
I wonder why it is that some don't need a tach adapter (I didn't on my '87).
Mark H. 1987 930, GP White, Wevo shifter, Borla exhaust, stock everything else. The result of a massive Pelicanite good will fire recovery effort. Truely an open book, ready for the slippery slopes to modification.
Old 03-17-2010, 02:33 PM
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