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E85 without a tune?

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Old 04-14-2012, 10:22 PM   #1
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Default E85 without a tune?

Ok, so I've been reading the E85 stuff all day and would like to convert over. can I run it if I don't get a tune for say 1,000 miles? I know the ses light will throw a code and I don't really get into the throttle more than 1/2 at any given time. I mostly drive highway but would like to see how it goes. I alternated tanks in my bird for about 60k miles and put 155k on that engine and still runnng strong. I will get a tune eventually just not possible right now. Also planning other bolt ons so would like to wait till I have those completed for a tune.

Thoughts?
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Old 04-14-2012, 10:44 PM   #2
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it will not run with out a tune it will be to lean.it takes 30% more e85 than gas to run.i doubt it would even start
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Old 04-14-2012, 11:14 PM   #3
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wont work for ****, I run E85 in mine and gas, it wont even make it out of the gas station if I dont load the E85 setup in
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Old 04-15-2012, 07:31 AM   #4
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Alrighty then, I'll line up a tune first. Thanks gang
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Old 04-15-2012, 07:49 AM   #5
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I hope your desire to run E85 is a performance advantage and not as a daily driver to "save gas". I have absolutely no experience with fbodies on E85, but I can say that I ran a tank full of E85 in a "flex-fuel" Silverado I once had while on a trip .... the average mileage dropped by 5 mpg for the tankfull via the trip computer on the highway!

I realize it is 104 octane, so those that do run it on occasion, do you have dyno comparisons. I am curious how much more power you can get out it of a "dual-tune" without a build specific to E85.
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Old 04-15-2012, 10:43 AM   #6
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I wonder if a flex-fuel vehicle increases the timing when you are running the e-85?
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Old 04-15-2012, 11:42 AM   #7
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i believe they do since it usually takes more timing to burn e85 correctly
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Old 04-16-2012, 09:22 PM   #8
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I am looking for the performance increase. As opposed to flex fuel vehicles that may not have the high compression we do, milage suffers more. I'd like to get a set of heads that will give a tad higher compression with the ability to add some boost down the line. Not to mention a cleaner fuel and +1 for American made to boot. In all it just seems to be a better choice for my preference. And of couse if we're going to switch, I'd like to get on it to watch the performance from square one per say....
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Old 04-16-2012, 09:36 PM   #9
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yeah e85 is nice with boost but mpg not so much,im getting 11 city 15.2 highway
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