Join Date: Jan 2007
Location: far and away
Ferrari Life Posts: 6,192
I would be hard pressed on this particular item to produce pictures as my mechanic, the well respected and well known Brian Crall [Brian on this site] performed the procedure. I had burned out two of the four exhaust manifolds, which resulted in the respective CAT being fried. He researched and found the only difference was the extra sensor [The map and use of the sensor was in bed to the computer] was an easy weld over to modify to my earlier GT series. Losing that sensor posed no problem for adaption to the older, but migrating an older CAT to the M series would of course been more a problem.
I have tons of pics related to the Mondial T 348 rebuild etc. but very little regarding the 456. The only reason, and I don't know why else you are attempting this modification, to back fill the M series to the older GT is availability or a reliable part and/or cost. M has a greater number of parts vs older. They modified the engine timing to be old school method rather than use the pattern in the older GT: has zero issue with the hardware of CAT and Manifold.
Seems an expensive modification to me, to convert this way when IF the CAT is the only problem a new core, to the older M CAT used shell can be performed.
Perhaps I'm missing something....is the conversion supplying some other perceived need?
Guide to the Galaxy: Don't Panic
Rik -- LAH !
1990 Mondial T Cabriolet SN 86247 : Red/Tan
1995 456 GT 2+2 SN 99987 : Roso Metalizzato [Fer 311/C] & Tan