Forgive me if this is known information but I could not find any other threads on the subject. The thought occurred to me when I was reading some information on getting an ecu flash and the comment was made about putting beta maps on an alpha ecu, presumably because the beta’s maps are more aggressive. If this is in fact the case I thought to myself why not just use a beta ecu? The only thing that could have a negative effect on performance would be the injector sizing. If my information is correct the alpha X3 injector is 158cc and the beta1 injector is 225cc. Also the horsepower for the X3 alpha is 92 and the beta1 is 136. This gives us a .7-1 ratio on injector sizing and .68-1 ratio on the horsepower which would lead me to believe the both the alpha and the beta1 ecu would send out similar injector pulse widths. I may have bad information or even over looked some things so the best thing to do is to actually test it. I happen to have a 1996 Accent and also happen to have a 1997 2.0 Tiburon ecu. I installed it; the car fired right up and idled nicely. Once I got the engine to about 180f I drove it around the block for about 5 minuets and it seemed to drive just fine, no cel's or anything. I couldn’t drive it on the highway because the car is currently not tagged. Also I can’t really say if I felt any performance gains because I haven’t had any real seat time in it for the past 6 months. When I get some more time I’ll get a data log for the beta1 ecu and compare it to the one I have of my alpha. I data logged the alpha a while ago so I could have some data to put into my megasquirt which is currently in the car also. Please let me know if I’m missing something here or if any of my info is incorrect.