I know this has been covered before but I can't seam to find anything. What would be necessary in order to run a series 4 engine in an S5 using the stock ECU. Would it be possible to retain the OMP?

 

http://rotaryresurrection.com/2ndgen...o_s5_swap.html

 

I didn't remember seeing that on RR website. Oh, well. Sorry for the trouble.

 

Another Q, is possible to do the swap without swaping the front covers?

 

Yes. I've seen it done. You will need to do something about the S5 OMP though. If you are using the mechanical one, the S5 ECM still needs to see the electrical one there or else it will go into limp mode.

Josh

 

Nice, thanks. I probably won't use an OMP for now. Once I install the haltech I'll just use the S4's.