ECU recoding

[Paul]

I have reflashed 7.8 DMEs as recently as last month and as I said above a PST-2 with the latest version of software only asks what model of Porsche it is and what part of the world the car is being used. It does not ask for the displacement.

[JustinS]

Originally Posted by thstone

Yes. Both DME's run Motronic 7.2 but since the displacement is different, you'll need to change the maps.

Yes, a PST2 or PIWIS is needed. Some indy's and 3rd parties can do this also like Softronic.

Originally Posted by Paul

I have reflashed 7.8 DMEs as recently as last month and as I said above a PST-2 with the latest version of software only asks what model of Porsche it is and what part of the world the car is being used. It does not ask for the displacement.

Can someone comment with maybe some updated info? I am swapping a 3.2L into a 2.7L and I keep getting conflicting answers.Thanks! I understand that with the 3.4L 996 engine you definitely need to have it remapped.

[SoloPierre]

Originally Posted by JustinS

Can someone comment with maybe some updated info? I am swapping a 3.2L into a 2.7L and I keep getting conflicting answers.Thanks! I understand that with the 3.4L 996 engine you definitely need to have it remapped.

You just need to update the map in the DME with a PST2 or PIWIS like thstone and PAUL mentioned. It’s really easy. I have done this over a dozen times with 996 3.4 swap into a 986, ROW map upgrade, and S motor into a base car like you are doing. Just get the programming codes from your dealer and find someone with a PST2 or PIWIS. Only takes 2 minutes to enter the DME programming code and pick the the right map and 7-8 minutes to update the DME with the map. 10 mins total time to do the map update.