Contributed Custom Curves for your 123
We cannot be responsible for what you load into your 123ignition. Too much advance coupled with pinging or a rattling sound can cause catastrophic damage to your engine. These curves can be modified once installed. You are responsible for what you load into your individual ignition.
You will need to manually enter the values into your TUNE or TUNE+ software
Please Note: Limit your curve to as few points as possible. Usually 4 to 6 work best. Always use a timing light to confirm your timing is correct.
Here are a couple ways to help you sync the app with the motor. Applies to programmable units
1) Set a program in your app to 20* across all rpm's. Start the motor and verify that you have 20* at the crank. If you do not, simply loosen the distributor and adjust it until you do. Once you have 20* at the crank, tighten the distributor down. The app is now synchronized with the motor and you can now confidently add a program of your choice and know that it is accurate.
These examples are from the TUNE software
Example 1 (This curve should never be used)
Example 2 (Volkswagon Bosch-distributor 0.231.170.034)
Example 3 (Mercedes 250SE, 250SL Bosch-distributor 0.231.116.051 Negative Vacuum)
Example 4 (Idle control and gearshift retard)
Example 5 (Porsche 4 cyl Tuned Engines Bosch-distributor 0.231.129.009 No vacuum)
Following Examples are contributed
MG MGA MGA 1622 (?) Lucasnr. 40510 ( DM2 ) static setting : - 10 degrees before TDC for all engines until number 4003 - 10 degrees before TDC for high compression engines after number 4003 - 05 degrees before TDC for low compression engines after number 4003
VW 0 231 129 009 Tuned VW engines with vacuum