[peterd]

I am using a FAST (Fuel Air Spark) ECU with my custom EFI. I have a MSD distributor and am required to provide 50 degrees advance for the ECU. The ECU takes the 50degree and determines what the advance should be at all RPM. 50 degrees is used because max advance is 40 degrees, the extra 10 degrees is needed be the ECU to calculate the actual advance. The problem is that the distributor assumes that the spark advance = the time at which you wish the distibute the spark. With the advance at 50 degrees the ECU may determine not to produce a spark until 20 degrees, by which time the rotor has already passed the plug lead. I need to change the rotor arm position relative to the magnetic pick. Is there a distibutor available to do this or do I have to modify my MSD.???