07-27-2003, 12:49 PM
I have run a 6AL in my Cobra replica for about 18 months with no problems. This past weekend, I ran my first track day at TMS. In the last couple of minutes of the first 30 minute session, my car sputtered going into turn 3, cleared out and then quit completely in turn 4 (At about 110mph). I coasted into the pits, the car wouldn't restart, but would "Hit" about 3 times, then not fire. With the coil wire disconnected, the spark looked good. After checking all that I could think of, someone suggested replacing the rpm limit chip. So I did that. The car restarted and ran fine. During the second 30 minute session, the Cobra ran great for about 25 minutes, and then started misfiring above 4500 rpm, so I came into the pits and loaded it up. The MSD is mounted on the inner fender well. I am using a Blaster SS coil and a ford Duraspark distributor with the 6AL on my 351 Cleveland. The car runs fine on the street, in traffic, at the dragstrip, etc. Is my problem probably heat related? I realize that running at top speeds in 99 degree heat is pretty extreme. I believe I will mount the 6AL under the dash, but would like to know, if I send the unit to you, can you test it and see if it is possibly damaged? Is there another MSD model better suited to my application? I can't use the MSD distributor because the cap (And the large Duraspark cap for that matter) interferes with my dual quad carb setup, so I am running a standard Ford cap and rotor.