I got around to installing and the unit this weekend. For reference, I have a 1971 Mach 1, 351C 4V, with a 4 speed toploader. The installation was simple and straightforward. Drop in the distributor, connect the vacuum line, then wire it up. As far as wiring, there are only 3 wires to connect the harness (4 if you wire in a tach), negative & positive on the coil, ground, and the optional tach output. Once you are good to go, crank up the engine and set timing to 10 degrees BTDC.
Below is how I setup my curve:
And here is the resulting table:
I didn't tweak any of the values at all in the table above. But as you can see, you can customize each field or section as needed.
Something I noticed right away, I have a manual choke carb and no longer need to use it during a cold start. As you can see by the table above, when RPMs drop below your idle range, timing is bumped up which then increases idle back up. Also, the unit ******* timing to 10 degrees BTDC during cranking, so starting is a breeze. As far as driveability, I would say it is a noticeable improvement over my old Duraspark I setup. The engine just feels like it wants to take off at all times, even applying minimal throttle.
Eventually I'll play with the timing a bit to see what limits I can push. But I'd like to cycle through the old gas that's been sitting in the tank all winter first. I must say, it's nice to be able to make on the fly adjustments from your phone, without the need to pop the hood. Especially for those folks that have AC, adjusting the timing can be a PITA.
One other thing worth mentioning, the distributor *just* fits under a stock Ram Air setup. I also have a 1/2 inch spacer under my carb, which is about all you can get away with having Ram Air. Without the spacer, I would not have had enough clearance.
Let me know if you have any questions. I'll have more feedback once I get to test it out more.
