does any one know where the ecus are located in a 200 s4 and a 1997 a4...probably the same area...but also, is this a tough job to do, swapping the ecus...i need to put in the s4 ecu into my a4, for the motor swap...or do i??any suggestions?

 

personally, i think it would be a huge waste of money to do the swap you want. just buy an s4. but i guess if you wanted to do all the custom work, yes you would need to swap ecu's, you cant run a single turbo ecu on a biturbo engine/vice versa. not to kill your vibe, but my suggestion is: dont do it.

 

standalone anyone Yes they are prolly in the same location

 

which is in the rain tray drivers side in the little black box

 

would a standalone system work...and what kind...i need some input, b/c im putting an s4 into an a4....i no, i no, i have the experience to do it my self, and all the parts im getting for dirt cheap...but besides that, i think a standalone would be good.

 

well i honestly would use standalone unless u were gonna upgrade the turbo to say 2 gtseries turbos...one day I'll do this. If you did want to I would use o34efi stg2c. Check out www.motorgeek.com for more info