E85 Tune

_BSMM5 · 07-20-2019, 02:18 PM

Considering an E85 tune, but the only E85 station near my home is about a 10 minute drive and there is not one close to work.

What are the consequences of putting in 93 on and E85 tune if you can't flash your car back?

On the BM3 platform will it affect the car to go back and forth between E85 and 93 multiple times in the same week?

hellokitty · 07-20-2019, 05:12 PM

I bring 5 gallon gas tanks with me every time I fill up and keep spare E85 in the garage to last. The closest station is 20 minutes from me.

Continental02 · 07-20-2019, 05:24 PM

The car will not run properly if you don't have E85 on an E85 tune. It gets super choppy and basically undrivable. Get some VP fuel jugs and keep some E85 at the house. I was in the same situation and found that worked really well for me. I'd fill up 3-4 jugs and just top off as needed/when I was too lazy to drive to the station.

Fast4d · 07-21-2019, 02:39 PM

5 gal and 3 gal VP fuel jugs!

I map out all the E85 station if I do a trip. gas buddy app works well

Spoolin Montego · 07-21-2019, 04:37 PM

my car runs completely fine on 91 octane when i have my e85 tune loaded...just dont hit the gas and keep the revs low.

Bluer2 · 07-21-2019, 05:35 PM

Is it safe to keep jugs of gasoline in the garage? Will my house explode? Asking for a friend.

hellokitty · 07-21-2019, 05:39 PM

Quote:

Originally Posted by Bluer2

Is it safe to keep jugs of gasoline in the garage? Will my house explode? Asking for a friend.

Get a quality container that seals property (no plastic) and you’ll be fine.

Chris@VargasTurboTech · 07-21-2019, 07:05 PM

Boost and timing targets for E85 are typically far too aggressive for 93 octane to handle. Additionally, you have to (roughly) flow 20-30% more ethanol vs. gasoline for the same power levels, meaning your fueling and a/f targets are going to be wrong. Bottom line, don't do it.

If you had an ethanol map and in an emergency situation *had* to put 93 octane in, you could limp the car home, she'd be running excessively rich (by a large margin) and you'd have to stay out of boost, but it could be done. Personally? I'd simply never let it happen. Find your stations, get a routine, keep 5-10 gallons at home, if you want to make it even easier pick yourself up a transfer pump to you're not juggling around a bunch of weight, or keep your device in the car for a simple flash to pump gas when necessary.

Chris

SflBimmer8484 · 07-22-2019, 08:20 AM

Ive had this situation unfortunately and drove home 20+ miles on 93. Just cruised at 60mph and did not accelerate at all.

mike@x-ph.com · 07-22-2019, 11:54 AM

Quote:

Originally Posted by hellokitty

I bring 5 gallon gas tanks with me every time I fill up and keep spare E85 in the garage to last. The closest station is 20 minutes from me.

Same here

blockdoc · 07-22-2019, 08:07 PM

Quote:

Originally Posted by mike@x-ph.com

Quote:

Originally Posted by hellokitty

I bring 5 gallon gas tanks with me every time I fill up and keep spare E85 in the garage to last. The closest station is 20 minutes from me.

Same here

Same for me. Works fine

_BSMM5 · 07-23-2019, 02:29 PM

The car is a daily - I think I will get the E85 tune but keep my flash ready to go when I need to switch to 93. I live in a building so don't really have an option to store tanks at home and not sure about storing it inside my place lol. I could keep some at work though.

nbennettksu · 07-26-2019, 09:35 AM

Quote:

Originally Posted by Spoolin Montego

my car runs completely fine on 91 octane when i have my e85 tune loaded...just dont hit the gas and keep the revs low.

This! It's only going to run like shit if you WOT.

07-20-2019, 02:18 PM	#1
_BSMM5 Second Lieutenant 124 Rep 238 Posts Drives: 2015 M3 Join Date: Sep 2017 Location: Somewhere in Texas iTrader: (0) Garage List 2007 BMW 335i [0.00]	E85 Tune Considering an E85 tune, but the only E85 station near my home is about a 10 minute drive and there is not one close to work. What are the consequences of putting in 93 on and E85 tune if you can't flash your car back? On the BM3 platform will it affect the car to go back and forth between E85 and 93 multiple times in the same week?
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07-20-2019, 05:12 PM	#2
hellokitty Brigadier General 2896 Rep 3,726 Posts Drives: '17 M3 ZCP DCT Join Date: Jul 2010 Location: Southern California iTrader: (2)	I bring 5 gallon gas tanks with me every time I fill up and keep spare E85 in the garage to last. The closest station is 20 minutes from me.
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07-20-2019, 05:24 PM	#3
Continental02 Enthusiast 248 Rep 304 Posts Drives: M3 CS Join Date: Dec 2016 Location: Las Vegas iTrader: (1)	The car will not run properly if you don't have E85 on an E85 tune. It gets super choppy and basically undrivable. Get some VP fuel jugs and keep some E85 at the house. I was in the same situation and found that worked really well for me. I'd fill up 3-4 jugs and just top off as needed/when I was too lazy to drive to the station.
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07-21-2019, 02:39 PM	#4
Fast4d Captain 267 Rep 885 Posts Drives: 325 Join Date: Jan 2012 Location: So cal iTrader: (0)	5 gal and 3 gal VP fuel jugs! I map out all the E85 station if I do a trip. gas buddy app works well __________________ SAFE-GUARD tire/wheel/windshield/paint protection is a FRAUD! do not waste your money!
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07-21-2019, 04:37 PM	#5
Spoolin Montego Captain 602 Rep 871 Posts Drives: 16 m3/20 x5m/23 m3 Join Date: Mar 2012 Location: Orange County iTrader: (1)	my car runs completely fine on 91 octane when i have my e85 tune loaded...just dont hit the gas and keep the revs low.
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07-21-2019, 05:35 PM	#6
Bluer2 Captain 533 Rep 916 Posts Drives: F80 Join Date: Feb 2017 Location: Houston iTrader: (9)	Is it safe to keep jugs of gasoline in the garage? Will my house explode? Asking for a friend.
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07-21-2019, 07:05 PM	#8
Chris@VargasTurboTech Lieutenant Colonel 1932 Rep 1,532 Posts Drives: All Things TurboCharged Join Date: May 2016 Location: Bay Area iTrader: (0)	Boost and timing targets for E85 are typically far too aggressive for 93 octane to handle. Additionally, you have to (roughly) flow 20-30% more ethanol vs. gasoline for the same power levels, meaning your fueling and a/f targets are going to be wrong. Bottom line, don't do it. If you had an ethanol map and in an emergency situation had to put 93 octane in, you could limp the car home, she'd be running excessively rich (by a large margin) and you'd have to stay out of boost, but it could be done. Personally? I'd simply never let it happen. Find your stations, get a routine, keep 5-10 gallons at home, if you want to make it even easier pick yourself up a transfer pump to you're not juggling around a bunch of weight, or keep your device in the car for a simple flash to pump gas when necessary. Chris
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07-22-2019, 08:20 AM	#9
SflBimmer8484 Brigadier General 1467 Rep 3,157 Posts Drives: . Join Date: Dec 2011 Location: Florida iTrader: (5)	Ive had this situation unfortunately and drove home 20+ miles on 93. Just cruised at 60mph and did not accelerate at all.
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07-23-2019, 02:29 PM	#12
_BSMM5 Second Lieutenant 124 Rep 238 Posts Drives: 2015 M3 Join Date: Sep 2017 Location: Somewhere in Texas iTrader: (0) Garage List 2007 BMW 335i [0.00]	The car is a daily - I think I will get the E85 tune but keep my flash ready to go when I need to switch to 93. I live in a building so don't really have an option to store tanks at home and not sure about storing it inside my place lol. I could keep some at work though.
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