I think it would be quicker for me to just have an E85 and a gas tune maybe a 87 octane tune as well. Then just switch them out manually. I just figured that there must be something out there.
That is an idea to switch from one to the other. I've made redundant PLC control panels for critical applications, and it only takes 1 relay for each set (1 normally open and the other normally closed) and an A/B switch, but for the PCM that would take a relay bank 20" by 10" and heaven forbid a relay goes out lol.
Jeff
