Both have their merit. Stock ECU works without any modifications to the stock loom or ignition system.RRR said:Ok. Would it be easier to use the MS then?
If you have the luxury of a dyno to map on, the stock ECU is easy to map.
If you want to do the mapping in the field, you really want a datalogger to assess the progress, something that can record EGTs on all cylinders and air:fuel ratio along with engine speed and throttle position. I am accomplishing this with a solution from Innovate Motorsports.
If you get MS, well, you can datalog from the ECU to a laptop or mobile phone for everything except EGT, MS2 has only two free channels that could be used for EGT. I think MS3 has more channels and internal logging but it also costs as much as an AEM so I don't know if it's really a good option.