Does anyone make an ignition system with a timing retard function for mod motors?
MSD makes the DIS-4 which has 2 types of timing retard functions. It’s retard functions are based on RPM instead of boost pressure like the MSD-BTM. You can pull a set amount of timing after any rpm after 4000rpm, or use the High Speed retard feature which will progressively pull timing from any point after 4000 rpm to redline linearly. For example the first feature can be set to pull 7* of timing at 4000 rpm so your timing would resemble this: 3000 27* 4000 20* 5000 20* 6000 20* With the high speed retard it progressively pulls the timing depending on RPM. The higher you rev the motor the more timing it pulls.
