Jim only some eec 4s are mappable, however the reason is to move to coil pack as rs2000s run edis 4 .
Wondering if it could retard to to run turbo engine, as for fueling i only need a little extra squirt so i use a MSD 5th Injector.

Looking at megasquirt but some people are ify but it is fully mappable, other alternative is to spend the money and go MBE