I installed the Bluetooth unit on my 1911cc, webcam, dual IDF 40s s week. Took a couple days to get it sorted out as I had a few DAO-induced problems. Took it for a drive and head temps seemed to run cooler than usual on this particular drive but I may have been taking it easy. Very happy with the way the car runs and features of the distributor. Here’s what I learned:
1. The 123 wires up to MSD ignition exactly like the old Pertronix unit
2. MSD Blaster 2 coil resistance is too low (<1 Ohm). I installed a new Bosch blue coil
3. There are 10 video tutorials on the 123 website. I found them very helpful for my understanding how it works.
4. You can only change the curves with the ignition ON and engine NOT running
5. You can see what the unit is doing and make temporary advance changes via the Tune feature with the engin running
6. Follow the manual for paring the unit to your device the first time. Once pared here’s how to use it
6a. Turn ignition on first then open the App if you want to change curves. You can start the car after changing the curves without cycling power or reopening the App. Change the curves per the manual but when you are finished hit DONE and then WRITE or the 123 will not see the new data. If you futz with the curves and want to go back to what you started with hit DONE and then READ and the App will display what is stored in the 123
6b. Start engine first then open App if you want to drive and use the Tune feature.
7. When you open the App, make sure it connects AND reads the distributor data. You’ll see it on the App when connecting/reading.
8. To use Tune, hit Tune on the dashboard screen and use the arrows to advance or retard up to 10 degrees. This shifts the entire curve, kinda like changing the basic timing from, in my case from TDC to +/- 10 degrees. The Tune data is not stored in the 123. Once you hit TUNE again to get out of tune mode your changes disappear.
9. My curves are below. I set my timing to TDC and use the 123 to set the advance
10. Be careful handling your phone when the dashboard is open. I accidentally got into TUNE mode and retarded my timing 10 degrees TWICE during a 90 minute drive. I highly recommend a copilot to operate the device while driving.
I’m sure there’s more. If I think of anything else I’ll edit this post.
Cheers
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