I've noticed the new Civic 1.5T's are getting some great power gains from using ethanol blends of 30-40%. The flashpro preset tunes can accommodate a wide range of ethanol concentrations by added a single sensor to the fuel line as far as I can tell from reading. I know the RDX needs fuel delivery upgrades to use E85, but can flashpro for RDX easily take advantage of say E30 in the same way? This would help cool the intake charge and thrn maybe we won't have trade more boost for less timing?

 

I don't know about the added sensor and E30-40, but I've got my RDX running on E85 right now. All I did to make the change was bigger fuel injectors, bigger fuel pump, and a custom tune from Vit Viper for E85. LOVING my RDX right now with E85.

Although I think even with just E30-40 you would need to upgrade your injectors. Right now with my 800cc injectors, they are running at 81% duty.