I have done VEMS PnP on several Porsches:
Motronic 55pin:
1. 1989-1994 Porsche 964 Carrera 2/4
2. 1994-1998 Porsche 993 Carrera
3. 1987-1988 Porsche 944 S 2.5 16v 190 hp
4. 1989-1991 Porsche 944 S2 3.0 16v 211 hp
5. 1992-1995 Porsche 968 3.0 16v 240 hp
Motronic 35pin:
1. 1983-1989 Porsche 924S/944 2.5/2.7 8v 150-165 hp (this kit also has German TÜV approval)
2. 1985-1991 Porsche 944 Turbo 2.5 8v 220/250 hp (it additionally has 25pin KLR ECU)
3. 1983-1989 Porsche 911 3.2 Carrera 231 hp
For photos etc see http://www.facebook.com/vemsporsche