MSD 6A (or AL)
Thread Starter
Staging Lane
Joined: Aug 2006
Posts: 66
Likes: 0
From: SE Michigan
MSD 6A (or AL) I'm thinking about putting on an ignition box this winter. As best I can tell, the only difference btw the MSD 6A & 6AL is the built in rev limiter. Should I just go with the 6A, being that there already is a rev limiter in the PCM or is there something I'm missing here?
94 Z28
383 Stroker
PCM for less tune
94 Z28
383 Stroker
PCM for less tune
12 Second Club
Joined: Oct 2007
Posts: 40
Likes: 0
From: Ellensburg WA
The rev-limiter in the ignition box limits via killing spark. The PCM limits via pulling fuel. Pulling fuel creates potential dangerous lean conditions. The ignition box limiter is not only safer, but far more accurate and consistent. And the way it pulls spark is "smart" it will alternate which cylinders it doesn't fire; therefore, you don't have cylinders just loading with fuel repeatedly.
If you plan on reaching limiter often, I would swing for the AL.
If you plan on reaching limiter often, I would swing for the AL.
The rev-limiter in the ignition box limits via killing spark. The PCM limits via pulling fuel. Pulling fuel creates potential dangerous lean conditions. The ignition box limiter is not only safer, but far more accurate and consistent. And the way it pulls spark is "smart" it will alternate which cylinders it doesn't fire; therefore, you don't have cylinders just loading with fuel repeatedly.
If you plan on reaching limiter often, I would swing for the AL.
If you plan on reaching limiter often, I would swing for the AL.
