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-   -   Minimum 51% Ethanol (https://www.ft86club.com/forums/showthread.php?t=102796)

smg1138 03-12-2016 08:44 PM
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?

Ashikabi 03-13-2016 03:16 PM
Quote:
Originally Posted by smg1138 (Post 2578953)
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 03:46 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 11:10 PM
Quote:
Originally Posted by phrosty (Post 2579487)
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 11:18 PM
Quote:
Originally Posted by smg1138 (Post 2579796)
Really? I could have sworn I read somewhere that it was 60%.
Ask shiv

phrosty 03-13-2016 11:41 PM
Quote:
Originally Posted by smg1138 (Post 2579796)
Really? I could have sworn I read somewhere that it was 60%.
Quote:
Originally Posted by Shiv@Openflash (Post 1388796)
...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 09:22 AM
Gotta love Australian minimum standards :D 70% minimum

smg1138 03-14-2016 11:23 AM
Quote:
Originally Posted by COO86L (Post 2580056)
Gotta love Australian minimum standards :D 70% minimum
http://cdn.meme.am/instances/500x/27345857.jpg

Sportsguy83 03-14-2016 11:59 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 02:06 AM
Quote:
Originally Posted by Sportsguy83 (Post 2580183)
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 03:06 AM
Quote:
Originally Posted by smg1138 (Post 2580137)

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



http://www.unitedpetroleum.com.au/im...rsn=4&size=940http://www.themotorreport.com.au/con...27-920x544.jpg

DustinS 03-15-2016 11:33 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 11:54 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 05:44 PM
If it makes you feel any better I've been running on a min 51% station for over a year no problem


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