I ran my MMC supplied and fitted Stage 1 exhaust and air cleaner upgrade on the stock ECU for about 14,000 miles with no ECU/check light problems.
As I don't have power where I store the car in I disconnect the battery each time (using a Battery Brain remote controlled disconnect). It's never been a problem restarting and runs fine straight away.
Krazy Horse changed it to an unlocked ECU when upgrading to the 596 cams. Based on their dyno testing the 569 are on the limit of the stock ECU adaptive range so the fuel map needs to be tweaked.
Re the cams, the stock and 569 are both Easy start.
Last edited by Chris99; 28/05/19 10:38 AM. Reason: Corrected cam to 569
