||to make the ethanol content sensor obsolete? Or can you do that now? New flex fuel vehicles do that now. Measuring dielectric constant of the fuel, from this, inferring the ethanol percent then using lookup tables to adjust fuel mixture seems to be quite a round about method to get the correct fuel air mixture when you could just use feedback. That would be pretty slick, and seems like it would be the proper way to use a standalone.
For me, most safeties, knock control, boost control, aren't really necessary since I usually to run E in the 80's. Sensors might be useful at times but I just plug in Nissan Datascan, or ecutalk...protection setting might be nice. I don't want traction control, but maybe if I had a lot more hp. I've heard that MAP is problematic in that there are a lot of scenarios that can be a pain to program for.
Standalone sounds like a clean solution, but expensive in terms of tuning time.