e85 questions

[jojo4711]

I did use the search function, just have a couple questions that will also go to my Lund tuner. Just trying to get quicker response here.

I have an E85 tester on the way from Amazon. Looks easy enough. My main question is, how low on an E85 tune can I run my car safely? E80? E70?

Second question, if I test the pump fuel and its E70, what can I use to bring it up to E85? Do you just buy pure ethanol from Autozone or similar and add it to the tank?

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[turnswrench]

I did use the search function, just have a couple questions that will also go to my Lund tuner. Just trying to get quicker response here.

I have an E85 tester on the way from Amazon. Looks easy enough. My main question is, how low on an E85 tune can I run my car safely? E80? E70?

Second question, if I test the pump fuel and its E70, what can I use to bring it up to E85? Do you just buy pure ethanol from Autozone or similar and add it to the tank?

Talk to your tuner about the ethanol level you will be using. Personally, if it isnt e85 or better, it's not going in my car. I keep pails of One Ethanol in the garage if the fuel is testing low

 

[xXoVrKiLLXx]

Talk to your tuner.

 

[jojo4711]

So what do I use to increase say E70 to E85? Where do I buy it?

 

[AZ18yote]

If e quality is low run a flex tune that can adjust based content. That is your safest bet. Typically a flex will only sacrifice some of the immediate down low timing but top end will be just as good.

 

[IrishStallion]

I run e70 all the time with my corn tune. Send your tuner logs. I do not know of any E boosters that increase ethanol content specifically.

 

[jojo4711]

So I need to test the E85 in my area to see what is available before I go forward. Makes sense. I figured there was a way to buy pure ethanol and add it to low grade E85 to bring it up. Thanks for all the replies.

 

[bluebeastsrt]

Which tune do you have? A flex tune or a dedicated e85 tune? If your an N/A car running a flex tune. You don't have to do anything.

 

[jojo4711]

I don’t have anything besides the 93 tune right now, but want to run E85. So seeing what my options are. The tuner at Lund said to test the gas near my house and see what’s available. Then I guess he can build a tune around what’s there.

 

[jojo4711]

Which tune do you have? A flex tune or a dedicated e85 tune? If your an N/A car running a flex tune. You don't have to do anything.

Will there still be a big difference between a flex tune and 93?

 

[AZ18yote]

Will there still be a big difference between a flex tune and 93?

Huge if running flex and have e85 in the tank.

 

[bluebeastsrt]

Will there still be a big difference between a flex tune and 93?

Absolutely there is. Your car will run smother and you'll likely gain 20-25whp on a bolt on car. A flex tune just takes all the worry out. Knowledge is power. So it's good that your testing your e85 from time to time. But the tune will accommodate for differences in the percent of ethanol. So you don't have to worry about being dead on 85%. I've been as low as 70% (winter) when I ran a flex tune. And still made significantly more power than 93 octane. Once you get into big power boosted cars. That percentage becomes alot more important.

 

[Zrussian13]

Lund told me keep the ethanol content with in 15% so you could run e70 on an e85r tune and should be fine as long as it's no lower than that but personally I don't go lower than 75% with out switching to flex tune.

 

[jojo4711]

Ok so I’ll probably just go ahead and pay for the flex tune and fill up with “E85” every time. Then I don’t have to worry about testing correct? And if E85 isn’t available, I can run 93 gas on the flex tune?

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