The proper way to Wire up a Msd 6AL BTM.

[1WheelWonder]

After personally searching for the correct way to wire an MSD ignition I realized there was not a straight forward answer, it was always links to links. Just do a search on MSD BTM and you will see. I just finished mine tonight and it runs great, better than ever. I have a 91 DOHC, so this may or may not work on 89-90 or 95-98.

-Thick red goes to the positive battery terminal-Thick black gets grounded

-Thin black will go directly to the negative terminal of the coil which will replace the exisiting green and black wire (stock or aftermarket) I'm using a MSD coil-Orange wire will go directly to the positive coil terminal which replaces the Black and Red wire (stock or aftermarket)

You will need to use the White wire on the Msd box instead of the magnetic pickups.-The White wire will tie into the Green and Black wire-The Red wire will tie into the Black and Red wireSo basically the original coil wires runs to the Msd, gets amplified then powers the coil by means of the White and Red wires.

Hopes this helps

[Jookmasta]

so any descriptions as to where u felt the improvement? throttle response wise? boost wise? rpm wise? just want to know as i was considering an msd 6al for a while

[1WheelWonder]

Idle quality and throttle response were improved. Boost seems to come on a hair quicker nothing dramatic. But when it hits it pulls significantly harder, possibly due to base timing being back at 20 degrees .It revs a whole lot quicker, and cold whether driveabilty was improved as well. Before in cold weather it had a bog in partial throttle, it's gone now. The rev limiter is rock solid on it. I highly suggest the 6al/Btm for everyone, especially for us guys that are just using the Safc.