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04-10-2014, 08:16 PM | #1 |
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E85 possible issues?
Does anyone here have any issue when mixing in E85 and getting close to running on empty?
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04-10-2014, 10:09 PM | #2 |
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04-11-2014, 09:41 AM | #4 |
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04-12-2014, 01:38 PM | #6 |
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04-15-2014, 12:20 PM | #7 |
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My strange issue was that somewhere around 1/10th of a tank left I got a strange warning light..looked like the same check engine light in my Audi... The turbos would not spool at all, as if they didn't exist. I was wondering becuause when I fill up (not all the way of course), I stop at the 93 octane pump put in 4 gallons, then inch over to the e85 and put in 2 gallons.. Comes out to 33% E85.. Wondering if it was somehow not mixing correctly and at the end of the tank I was running on pure e85 or something weird. Once I filled up again, it went away..
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04-15-2014, 01:17 PM | #8 | |
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04-15-2014, 10:07 PM | #9 |
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anything above 35% e85 without adjusting fuel scalar will give you problems.
over 65% without upgraded lpfp will also give you trouble.
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04-16-2014, 12:09 PM | #10 |
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even with JB4 on map 5 and all the upgrades?
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04-16-2014, 02:22 PM | #11 |
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Piggybacks are awful at controlling fuel since they cannot interact with the DME outside of biasing things. It doesn’t matter what map you run, you need a flash to properly manage fueling, and a secondary pump to handle it on the hardware side.
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04-16-2014, 05:55 PM | #12 |
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Teach me the way...
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04-17-2014, 11:30 AM | #13 |
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I have an N55 with Flex Fuel wires and I have no problems with Jb4 controlling fuel on Map 7, Map 5, and Map 3 with Meth. I have a Inline fuel pump though so I can run 50/50 e85. Plus I am upgrading turbo this summer. You will be perfectly fine.
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04-17-2014, 01:45 PM | #14 |
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I've had that problem. Just figured that maybe the mix wasn't great and that towards the end of the fuel in the tank there may be a lot more e85 than 93 oct. Just stop by a gas station and fill up with more 93 or whatever the highest octane is where you live and it'll even out the mix or "dilute" the amount of E85.
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04-17-2014, 02:10 PM | #15 |
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what's the best way to go from where i'm at now to running a higher % of E85 safely and effectively gaining more power? Flash and a LPFP?
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04-17-2014, 02:13 PM | #16 | |
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I have been running between 40-45% E85 mixed with 93 octane for 8 months with no issues in the logs (JB4 map 5). I dont really understand the whole "backend flash" process, so I need to get educated on that |
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04-17-2014, 07:35 PM | #17 | |
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04-18-2014, 12:05 AM | #18 | |
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Anyone running an ethanol mix PLEASE, PLEASE, PLEASE be careful and be dutiful in your logging. Simply going by how the car feels is not good enough. The N54/N55 are very good at keeping things in check but things can happen and the last thing that anyone wants to do is have to shell out a few grand for a new engine. |
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04-18-2014, 12:43 AM | #19 |
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I see ethanol mixtures posted two different ways in this post. One way is a e85 ratio, for example 2 gallons e85 plus 4 gallons 93 is 33% e85 mixture (which works out to be e28ish), and the other way is e30, e35, etc. I have not seen tunes described as 33% e85 mix. I do do have an e30 tune from protuningfreaks and my car runs great. When I want to switch back to 91oct I run the tank as far empty as possible, usually with 1.5 to 2 gallons left in the tank, before I fill up and never had any issues.
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04-18-2014, 03:38 AM | #20 |
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I like to run E26 ethanol, mixing in California 91 & E85 to run the Cobb Stage 2+ Aggressive map.
Unfortunately, my clutch slips on the actual Cobb E30 Race Maps. Google: Ethanol Mix calculator, I use the top link every fill up. Keep an eye out on STFT's. Make sure they stay under 32%, otherwise I believe our engine will be seeing lean conditions. |
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04-18-2014, 09:36 AM | #21 |
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I usually fill up once a week. On my fill up day things work out perfect because I'm always by the station that sells E85 on Wednesdays (my Fridays). With an almost empty tank I always do 3.5 gallons of e85 and the rest 93 oct.
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