MSD has recently released the new digital 6AL # 6425 to replace its older brother, the non-digital 6AL # 6420. This article will explain the differences between the two units.
RPM Control At Your Finger Tips
One of the first things you’ll notice when you take the Digital 6AL out of the box are the rotary dials tucked away in a stealth-like manner atop the box. The 6AL required the use of RPM modules, which came in a variety of RPM ranges. Instead of having multiple different chips to plug into it, you have the rotary dials where you can just set it and forget it. Or if you need to, you don’t have to rummage around for the pills; you just set it right there on the box. Rev limiter adjustments are right there under the dash, just a turn of the dials away and ready to adjust in just seconds and on the spot in 100 RPM increments.
Enthusiasts are continually squeezing more and more horsepower from their engines through the use of superchargers, turbochargers, and nitrous oxide. But these combinations demand increased spark output, and for many years the 6AL and its 480 volts and 115 millijoules of spark energy satisfied the demands of these performance upgrades. But like anything, it was only a matter of time before the 6AL was improved upon. The Digital 6AL delivers by producing an increased 530 volts and 135 millijoules of output. And it does so at a lower power requirement at just 0.7 amps per 1,000 RPM’s compared to the 1.0 amps per 1,000 RPM of the 6AL. More juice is always a good thing!
MSD Digital 6AL Highlights
• Integrated rotary dials eliminates the need for pills
• Same mounting foot print as the previous 6AL
• Weather-proof connector utilizes some wire color coding has previous generations
• Must use new digital two step box – not compatible with older pill-style versions
• 135-145 mJ per spark — 115 mJ on previous 6AL
• Primary voltage of 520-540 Volts – 480 Volts on previous 6AL
• Secondary Voltage of 45,000 Volts
• Works up to 15,000 RPM with 14.4 volts
• Current draw of .7 amp per 1,000 rpm – 1.0 am per 1,000 rpm with previous 6ALWhen viewing the wiring diagram for the 6AL and Digital 6AL, you’ll notice they share a striking resemblance to one another. The only, difference between the two is the sealed and locked connector on the new model that routes all of your wires out of one side of the module with one simple connector. Thus, if for any reason you need to remove the module from the car, the connections will snap right back in and you’re ready to go.