Ok, this will probably be a very stupid question here, and Yes, I have used the search function but didn't see quite what I was looking for. So heres what I'm trying to understand, is the difference between them, only the bin on the chip it self, otherwise they are pretty much the same thing? I was wondering because I was looking at getting another P28 for my Ex, and maybe start getting into tuning at some point, but getting it like ready. I would like to start out small and just learn how to do data logging just to see what I will see and start with the basics and get to learn that first then, move on from there once I've mastered somewhat, reading the data logs. HaHa. But the reason I ask is because in the near future would like to get a B16A and if possible reuse the ecu and hopefully by that time I would be knowledgeable enough on how to burn a new chip and convert it from a D16Z6 over if it would work. Make sense? My other question is, my friend has a 97 EX with the D16Y8 and if we were to get the crossover cable would a P28 work for his car also since the motor is almost the same just OBD-2 vs OBD-1? All input is much appreciated, and any criticism won't be shut down because it helps me understand both sides. But like I said, I would like to start small and learn how to read the data log and look and see what you would normally see, so I can get an idea of what I need to watch for. Thanks -Gary