Question for those who have flex fuel kit - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

stlgrym3 · 07-05-2018, 09:41 AM

I will have mine installed soon. What percentage of different types of mixed fuel (all petro, mix of petro and ethanol, all ethanol) would you have in the tank after installing the kit? Is a certain percentage of mixture of the fuel type that is best for the kit and my car? Or is it really up to me, there’s no harm whatsoever of the fuel mixture?

PhyrraM · 07-05-2018, 03:42 PM

100% gasoline (of appropriate octane) to E85 or anywhere in between. I usually drive easy for a mile or two after a fill up for the sensor to read, but in reality it's almost instantaneous.

stlgrym3 · 07-06-2018, 11:22 AM

Let’s say initially u filled up the tank with all petro, at the half way mark u filled it up with half tank of ethanol, can you feel the performance difference?

RallySTI · 07-06-2018, 11:30 AM

Quote:

Originally Posted by stlgrym3

Let’s say initially u filled up the tank with all petro, at the half way mark u filled it up with half tank of ethanol, can you feel the performance difference?

Yes, as long as you have a tune for the ethanol.

For my car anything above 50% Ethanol content feels the same power wise... going by my anecdotal ass dyno opinion.

stlgrym3 · 07-06-2018, 11:35 AM

Quote:

Originally Posted by RallySTI

Yes, as long as you have a tune for the ethanol.

For my car anything above 50% Ethanol content feels the same power wise... going by my anecdotal ass dyno opinion.

I’m getting the Delicious Tuning FF kit and their tune.

PhyrraM · 07-06-2018, 12:47 PM

Quote:

Originally Posted by stlgrym3

I’m getting the Delicious Tuning FF kit and their tune.

That's exactly what I have (albeit w/Harrop supercharger too), and the difference is very noticeable.

07-05-2018, 09:41 AM	#1
stlgrym3 Senior Member Join Date: Nov 2011 Drives: 2017 Subaru BRZ Limited Location: socal Posts: 562 Thanks: 72 Thanked 51 Times in 44 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Question for those who have flex fuel kit I will have mine installed soon. What percentage of different types of mixed fuel (all petro, mix of petro and ethanol, all ethanol) would you have in the tank after installing the kit? Is a certain percentage of mixture of the fuel type that is best for the kit and my car? Or is it really up to me, there’s no harm whatsoever of the fuel mixture?

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07-05-2018, 03:42 PM	#2
PhyrraM Senior Member Join Date: Aug 2012 Drives: '17 BRZ PP, old Legacy SSs and SVXs Location: Redlands, CA Posts: 119 Thanks: 34 Thanked 85 Times in 49 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	100% gasoline (of appropriate octane) to E85 or anywhere in between. I usually drive easy for a mile or two after a fill up for the sensor to read, but in reality it's almost instantaneous.

07-06-2018, 11:22 AM	#3
stlgrym3 Senior Member Join Date: Nov 2011 Drives: 2017 Subaru BRZ Limited Location: socal Posts: 562 Thanks: 72 Thanked 51 Times in 44 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Let’s say initially u filled up the tank with all petro, at the half way mark u filled it up with half tank of ethanol, can you feel the performance difference?

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