Join Date: Aug 2011
Location: Albuquerque, NM
Ferrari Life Posts: 11,881
Rik- If you want to do something, consider using one of John's COP kits to update the car. Remember also that Motronic 5.2 came with a develish alarm system with three matched fobs and two keys, an alarm ECU, and an immobilizer that cost quite a bit . If you put 5.2 DMEs on a 456, the engine will not start without a signal from the alarm/immobilizer ECU.
Sounds like more of a pain than it would be worth, not to mention that the 456M had a unique firing order only used once by Ferrari, I believe.
Late 456s, and not just 456Ms, came with 5.2 DMEs, by the way. If you look at your 456 WSM, you will note there are separate sections for Motronic 2.7 and 5.2.
Present: 575M 135171
Past: Dino 246 GT 02984, 365 GTB/4 14009, 308 GTS 25125
Every day I look around, and if nobody is shooting at me, it is a pretty good day.