MSD ignition wiring help needed
 

Can anyone help me by telling me where the diffrent wires from the MSD6AL and tach adapter 8910eis plug into my original wiring. I have been having troubles with this and MSD techs aren't really any help either because they only have wiring diagrams for the older turbos.

Hi Relkcab,
What year? Did you check this Pelican Article? Lotsa info on this, just search.

http://www.pelicanparts.com/techarticles/mult_MSD_install/mult_MSD_install.htm

[snip]

NOTE: Disconnect battery ground while installing MSD unit. The heavy red wire should be connected directly to your positive battery terminal connector. I found the best place to connect the heavy black ground wire was the chassis lug! located behind the battery, where the battery ground strap connects. A disconnect on the ground lug of the battery is handy to have. In both cases, dress the wires neatly and cut them to length, replacing the lugs with new crimp-on terminals.

Other Connections:

The wiring of the MSD unit is well illustrated in the excellent manual which accompanies the unit, but for the record:

Red wire: Red wire formerly on + side of coil Also connect to one side of 8910 tach adapter (use splicer in kit to attach directly to red wire)

Black wire: - side of coil

Orange wire: + side of coil

White wire: (green) wire from points, wire from tach (black/purple). (You can fashion a one to two wire adapter or use a splice co! nnector here) Also connect other side of 8910 tach adapter (use splicer in kit to attach directly to white wire)

When attaching these wires, I recommend sticking with the connectors already in place and using jumpers to make the female-to-female connections. In the event of an unlikely failure of the MSD unit, it is a trivial matter to drop back to standard spark but reconnecting the red coil wire (+), green point wire (-), and black/purple tach wire (-) back onto the coil and drive off.

[snip]

Here's an old drwaing of my set up.

http://forums.pelicanparts.com/uploa...1116149784.jpg

Cheers,
.Steven
1980 911SC

Thanks, Steven I forgot to post that my car is a 87 930. this looks like it should work for me but I wanted to make sure.

I use the main starter lug to tap 12v power.