I have searched every combination of words trying to find this answer, and I am just wanting a simple straight up answer. I have a new job and am going to start the build on my Evo from the daily driver it is now. I want to run dual maps so in the cold winters I can just run 93 and in the summers I can run e85.
I have fathouse fabrications going to run my e85 tune as they already took care of me originally for 93.
What is the EASIEST way to have both readily available and switch whenever I feel the need (and have an empty tank of course)

Please and thanks!

 

Tephramod will allow you two fuel maps within the ecu, can be switched by holding in the automatic intercooler sprayer button for about 5 seconds

 

'05 has no intercooler button

 

With Tephra V7 you can either wire up a switch, or set your gas peddle to trigger map switching before you start the car.

 

He is right . The TPS method would be the best and easiest for you . Off course you need Tephra do be able to do it . Then you go in Tephra option and you activate alt map by choosing 3 for TPS .

Now you need to floor the gas pedal for 5 second before starting the car . CEL light will then flash rapidly for alt map and slowly for normal map .

 

Is it similar setup for an Evo 6?