I am thinking about going to E85. My question is in the winter it changes to E70 Even tho you will probably not know. Will i have to retune when it goes E70 or it isnt that big of a deal?

what temperature does it normally go to E70 also?

 

depends on how aggressive your E85 tune is

 

Well if its snowy in your area you more then likely wont be hot rodding it so as long as you daily drive it normal I dont see a problem.

 

if you run an aggressive e85 tune its pretty important to know how much ethanol is in the fuel. if it changes over and you dont know, it could end up bad for you

 

yupp that is what im worried about

 

do you know what temp. it turnes to E70..

it is earthier E70 or E85 correct?

 

I don't think it cahnges at an actually temp, I asked the guy that manages one of the e85 places near me (It's like a farm place, so its kinda funny to see the Evo fillin up on E85 next to a bunch of tractors and farm trucks at this little farm gas station down a dirt road.) and he told me that change around October but it really depends on how fast they go thru fuel. He said it can be 85% up until december if it sells slowly, and inversly can stay 70% all the way into March.

But it may vary from place to place.

 

get a Zeitronix ECA to pinpoint percentage and adjust boost from there. Seems to work for this guy. http://www.youtube.com/watch?v=wsWZVrdpSRI

 

I was wondering about that my self, in CO we get cold winters and i wanted to know also if e85 will effect my tune.

Subscribed.

 

Well as stated before it depends on the tune, if you have a high boost aggressive tune then it will affect it more then a safe daily driver tune.

 

Where did you get the Zeitronix ECA?

 

http://www.zeitronix.com/Products/ECA/ECA.htm You still need a flex fuel sensor as well.

 

^yeah I just looked at it on the sight and the sensor is more then the reader! $359 for the sensor and $199 for the Reader!

 

Yeah Ethonal content sensors arnt cheap. I'm looking to go to te ProEFI standalone with the Ethonal content sensor so it can bleend my mape based on the % of ethonal in the system and its about the same price for the sensor alone.

 

Unfortunately E% varies much wider than 70-85%. We have seen as high as E92 and as low as E40 at pump where is suppose to be 70-85%. Engines were detonating badly on E40 with E85 tune.