Yeah no return or sensor is required unless you want the flex fuel capability, which I don't believe uprev has the software for that.

 

I'm actually heading to the dyno this weekend for a retune with ART pipes installed (had z1 HFC) and e85 map.

My fuel system includes:

600cc Bosch ev14 injectors

DW200 255lph e85 compatible pump

Fuel pump housing modified siphon jet and FPR according to walbro install suggestions.

I'll have a good 93 octane vs e85 dyno plot to share this weekend.

 

Reminder this is a mustang dyno so numbers are low.

Dyno plot shows 93 Oct with HFCs vs e85 with ART test pipes.

Art pipes gave 9-10hp over the entire curve (93 0ct) and e85 another 9-10.