Quote:
Originally Posted by P_Carfahrer
I have performed this mod in the last weeks. I had planned on using the 987 MAF tube and getting a tune from either a local tuner or Evo motorsports. My car is a 2001 S with the 7.2 DME. Both tuners said they can't make the 987 MAF tube in the 7.2 DME work as the map table size in bytes is larger for the 987 7.8 dme and they can't compress the map to work properly in the byte size table allotment in the 7.2. Enlarging the byte size map would change other addresses and cascades into an mess.
I cut the 986 MAF tube off and grafted it onto the 987 tube like in the thread. The id of the 986 MAF tube is still larger than the 997 Throttle Body. You just need to install larger hoses as the 986 hose restricts it even more.
If you have 2003-2004 with the 7.8 dme then the 987 tube can work.
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you can use a 996 tune on your car if you want to keep the larger maf tube.
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