I'm running the 88 turbo ecu. I already have a burned chip in it and running. I'm planning on TT injectors and possibly playing around with the z32 afm. I'm sure you guys do a great job and there is no doubt the stock ecu can be tuned to perfection. By educated guess I meant extrapolation. What I 'm really interested in is to find out what tables/values you actually change and in what steps. I'm sure the ecu's you are tuning and the z31 ecu are very similiar with the exception of the code and addresses. As far as I know JWT is the only person that does tunes for the z31 so I'm trying to find some information on the process in general so I can do it myself. Let me know if this is a bad subject for you to talk about. I dont want you to give away any secrets.