Minimum 51% Ethanol - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

smg1138 · 03-12-2016, 07:44 PM

Recently I've noticed more and more E85 stations in my area posting this sign on their pumps. It used to be 70% minimum, but that seems to be going away. I'm getting concerned about this because I sometimes run the OFT E85 tune which I believe can only handle a minimum of 60% ethanol content. Should I just give up on E85 or is there something that can done to deal with this change? I'm guessing the OFT tune can be edited to compensate, but I'm not sure how to do that. Anybody tried?

Ashikabi · 03-13-2016, 02:16 PM

Quote:

Originally Posted by smg1138

Recently I've noticed more and more E85 stations in my area posting this sign on their pumps. It used to be 70% minimum, but that seems to be going away. I'm getting concerned about this because I sometimes run the OFT E85 tune which I believe can only handle a minimum of 60% ethanol content. Should I just give up on E85 or is there something that can done to deal with this change? I'm guessing the OFT tune can be edited to compensate, but I'm not sure how to do that. Anybody tried?

Flex fuel will fix this. But OFT doesn't support it yet. I thought e85 had to be at least 70% by law?

phrosty · 03-13-2016, 02:46 PM

Pretty sure Shiv mentioned you only need about ~E40 to handle the timing on his E85 tunes.

If that's the case, you might be able to get away with just rescaling your MAF.

smg1138 · 03-13-2016, 10:10 PM

Quote:

Originally Posted by phrosty

Pretty sure Shiv mentioned you only need about ~E40 to handle the timing on his E85 tunes.

If that's the case, you might be able to get away with just rescaling your MAF.

Really? I could have sworn I read somewhere that it was 60%.

Ashikabi · 03-13-2016, 10:18 PM

Quote:

Originally Posted by smg1138

Really? I could have sworn I read somewhere that it was 60%.

Ask shiv

phrosty · 03-13-2016, 10:41 PM

Quote:

Originally Posted by smg1138

Really? I could have sworn I read somewhere that it was 60%.

Quote:

Originally Posted by Shiv@Openflash

...an NA FA20 will only need perhaps 100oct to make maximum power. Anything above that will not help. Which means that in terms of octane/knock suppression, the FA20 does not need to run E85. It could support maximum power by running something closer to E40.

And there are more threads than that mentioning MBT around E40.

In either case, I doubt it'd be unsafe to try a minimum 51% mix. Your LTFTs will just be fairly far negative. Log knock and ease it in to the higher RPMs if you're worried.

COO86L · 03-14-2016, 08:22 AM

Gotta love Australian minimum standards

70% minimum

smg1138 · 03-14-2016, 10:23 AM

Quote:

Originally Posted by COO86L

Gotta love Australian minimum standards

70% minimum

Sportsguy83 · 03-14-2016, 10:59 AM

There's no other way around it...

In order to properly do E85, you need a flex fuel kit and tune.

And its not only for safe power, it's also for cranking fueling and proper idle and fuel trims...

phrosty · 03-15-2016, 01:06 AM

Quote:

Originally Posted by Sportsguy83

In order to properly do E85, you need a flex fuel kit and tune.

Lets keep derailing this thread. What is "properly"? :P

steve99 · 03-15-2016, 02:06 AM

Quote:

Originally Posted by smg1138

actually were even luckier than that.

we also have guaranteed 85% e85 , thats guaranteed mixed with high grade petrol (98 ron) with a resultant octance rating on 107 thats guaranteed and you can buy it at pump in many locations

DustinS · 03-15-2016, 10:33 AM

Hopefully Shiv will comment on what he feels is okay to use with his e85 tune, but I do know he is working on flex fuel for the OFT. He currently has it working on his shop car. Last I heard he just needed to have some local testing done to make sure it is good to release. Shouldn't be too much longer.

smg1138 · 03-15-2016, 10:54 AM

I heard back from Shiv today. He said that the OFT E85 tune is good down to E50. That takes a load off my mind.

cameronjones239 · 03-15-2016, 04:44 PM

If it makes you feel any better I've been running on a min 51% station for over a year no problem

03-12-2016, 07:44 PM	#1
smg1138 Senior Member Join Date: Jan 2014 Drives: 2013 Raven FR-S Location: Nashville Posts: 775 Thanks: 968 Thanked 213 Times in 136 Posts Mentioned: 3 Post(s) Tagged: 2 Thread(s)	Minimum 51% Ethanol Recently I've noticed more and more E85 stations in my area posting this sign on their pumps. It used to be 70% minimum, but that seems to be going away. I'm getting concerned about this because I sometimes run the OFT E85 tune which I believe can only handle a minimum of 60% ethanol content. Should I just give up on E85 or is there something that can done to deal with this change? I'm guessing the OFT tune can be edited to compensate, but I'm not sure how to do that. Anybody tried?

03-13-2016, 02:46 PM	#3
phrosty Senior Member Join Date: Apr 2013 Drives: 2013 FR-S Location: Seattle Posts: 806 Thanks: 202 Thanked 320 Times in 199 Posts Mentioned: 18 Post(s) Tagged: 1 Thread(s)	Pretty sure Shiv mentioned you only need about ~E40 to handle the timing on his E85 tunes. If that's the case, you might be able to get away with just rescaling your MAF. __________________ 2013 Whiteout 6AT FR-S \| Perrin Inlet Tube + 2.75" CAI \| OpenFlash Header \| P&L Catback \| 4.88 Final Drive \| Dialed in OFT 2.0x Stage 2 E85 \| 18x8 Enkei Raijin + 225/40 Michelin Pilot Super Sport \| 17x7 Stock + 215/45 Michelin X-Ice Xi-2

03-15-2016, 10:33 AM	#12
DustinS Senior Member Join Date: Apr 2014 Drives: 2013 Ultramarine FR-S Location: Springfield, MO Posts: 1,948 Thanks: 2,539 Thanked 1,414 Times in 804 Posts Mentioned: 31 Post(s) Tagged: 3 Thread(s)	Hopefully Shiv will comment on what he feels is okay to use with his e85 tune, but I do know he is working on flex fuel for the OFT. He currently has it working on his shop car. Last I heard he just needed to have some local testing done to make sure it is good to release. Shouldn't be too much longer. __________________

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03-14-2016, 08:22 AM	#7
COO86L Senior Member Join Date: Dec 2015 Drives: 2015 86 GTS + Mitsi Lancer GSR Location: Lismore AUS Posts: 215 Thanks: 127 Thanked 93 Times in 68 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Gotta love Australian minimum standards 70% minimum

03-15-2016, 10:54 AM	#13
smg1138 Senior Member Join Date: Jan 2014 Drives: 2013 Raven FR-S Location: Nashville Posts: 775 Thanks: 968 Thanked 213 Times in 136 Posts Mentioned: 3 Post(s) Tagged: 2 Thread(s)	I heard back from Shiv today. He said that the OFT E85 tune is good down to E50. That takes a load off my mind.

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