I'm thinking about trying ethanol in my cars (evo X and evo 8) to help with only bad gas being available in my area and trying to get more performance and knock in check.

Not sure if going flex fuel since there are easy to install plug and play kits on the market at least for the X, or just doing dual tunes since I have tephra mods in both.

I'm only trying to use maybe 10-20% mix of ethanol, not 100% full on ethanol. I already have aem meth safe pump but original fuel lines, 1200cc injectors on the 8 and 1000cc on the X, VP racing ethanol is what would be used, no e85 pumps available.

Is the dual map the best way to acomplish a little more performance and keep the engine safe from knock?

What should be changed in the tune?

* injector size?
* what Afrs should be the aim spooling and fully spooled?
* add some timing?

Thanks for your help / opinions

 

If your worried about bad gas in your area just get a product called heet. It is pure methanol and it will take the water out of the gas if thats what your worried about. Plus its much cheaper then trying to get a race e85 and its available anywhere. If your using only light 10 to 20% I wouldn't worry about changing anything. Its just going to be like an octane booster and for what little you would be using it wouldn't make that much of a change in your afts. Car would run maybe a point richer then what it normally would.

 

Ive been on the most basic dual map (no flex) setup for 13 years, but in todays world, maybe a true flex fuel setup is the best?

Cant help w/any expert advice w/tuning but depending on your power goals, the bare min injector size would be a 1200cc setup. I would go larger if it were me!

I see you noted no E85 in your area but you have access to VP fuels

On the EvoX i know there is a post showing how ethanol damaged the in-tank fuel pump lines where the Evo 8 & 9 seem to be Ok w/the fuel lines and ethanol (look into that!)

Anyway, just wanted to chime in to say hello & hoping more of us will post up

Cheers, Joe

 

Another thing I will add is VP fuels aren't 105 octane fuel like regular pump gas is. I know some go up to 112 and 117 so you would need all new lines for that being its nasty. Keep that in mind as well.

 

I already tried using methanol in tank, and did not like it, started to have other problems so it did not work for me

Dual map would nbe the cheapest since I only have to do some tuning and not buy anything else

About the VP fuels, I'm thinking on going with the VP ethanol X85 or C85, maybe I could use some higher octane fuel like C12 and mixin a % as a octane booster

 

IIRC C85 has MTBE in it. If so you need fuel injectors rated for it.