On his website he claims it should work. I asked him about it since the program is larger than the address range he provided. We'll see where it goes, I dont care too much about the dual tuning functionality so much. If I can just get it so I can program it and have the ECU read it that would be great. Its still a 27SF512 chip so I don't see why I couldnt.

So is he wrong when he says it was originally a 256K chip? I dont understand