or nistune. Years ago I put a nistune mother board into my ecu, I had a existing tune that was running the car transferred into the nistune m/b, the tune was done by carl 90ttz..it worked well but I'd always intended that tune get me to point where I could have the engine fine tuned by a nistune shop. Well that hasn't happened, instead I've looked into and ended up buying a czp eprom to suite. Im going to check out the base timing on the czp eprom,and anything else I can with datascan and if I don't like it, (say the timing is advanced to much) I'm thinking of buying the nistune software. The ? is who is using the nistune s/w, and if you do what is the verdict, good bad easy just get it, all comments welcome.