Has anyone got quarter mile times with flex fuel?

CXRS · 11-08-2021, 06:05 AM

I'm looking into getting a 330i, and have been trying(with little luck) to find results of a flex fuel tune only setup. Does anyone have any data? I'm mostly curious about the results of a JB4 on map 5 or using a flex fuel sensor.

Thank you!

VipinLJ · 11-09-2021, 11:43 AM

I don't think we can run E85 on our cars. Running a blend is definitely possible. I run around E22-25 in my 330i with a jb4 on map 6.

CXRS · 11-09-2021, 12:10 PM

Quote:

Originally Posted by VipinLJ

I don't think we can run E85 on our cars. Running a blend is definitely possible. I run around E22-25 in my 330i with a jb4 on map 6.

How much should we be able to run? Is the limit around E50 or lower than that?
And also, what kind of times have you seen running that blend? My current daily runs high 12s at about 106-107 so I'm trying to get as close to that as possible.

VipinLJ · 11-10-2021, 10:09 AM

Quote:

Originally Posted by CXRS

How much should we be able to run? Is the limit around E50 or lower than that?
And also, what kind of times have you seen running that blend? My current daily runs high 12s at about 106-107 so I'm trying to get as close to that as possible.

I've tried going upto E30. But without a proper tune (running the JB4 alone with no additional wires/kit), it throws a drivetrain malfunction. Bumping it down to E25 works. With E27, it's a bit or miss (depending on the ethanol content of E85 at the pump I visit). So, without a tune or additional fuel kit, I'd say E25 is probably the maximum we can do.

And my fastest time is 12.95s @106.25mph. I've had three 12.95s runs, one 12.97 and one 12.99. multiple 13.0s runs. Highest trap speed ever was 107.50mph. Best 0-60 was 4.69s.

Knifeedge2k1 · 11-21-2021, 08:49 AM

there are a couple things to think about for running ethanol

there's the tune (if you have an aggressive tune, do u want to run a sensor that makes the tune less aggressive if you forget to mix in ethanol or mix in too little ?)

there's the hardware (pumps/lines), lines should be able to handle E85 in modern cars but the pump may or may not suffer more wear/deterioration (this is dependent on make/model of the car obviously)

11-08-2021, 06:05 AM	#1
CXRS New Member 5 Rep 20 Posts Drives: M550 and some other scheiße Join Date: Apr 2018 Location: Pittsburgh iTrader: (0)	Has anyone got quarter mile times with flex fuel? I'm looking into getting a 330i, and have been trying(with little luck) to find results of a flex fuel tune only setup. Does anyone have any data? I'm mostly curious about the results of a JB4 on map 5 or using a flex fuel sensor. Thank you!
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11-09-2021, 11:43 AM	#2
VipinLJ Petrolhead 1942 Rep 3,521 Posts Drives: ‘20 330i,‘16 X3,‘18 SQ5,‘17 A7 Join Date: Nov 2019 Location: Illinois iTrader: (2)	I don't think we can run E85 on our cars. Running a blend is definitely possible. I run around E22-25 in my 330i with a jb4 on map 6. __________________ Current: 2020 BMW 330i xDrive 2018 Audi SQ5 Prestige 2017 Audi A7 Prestige
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11-21-2021, 08:49 AM	#5
Knifeedge2k1 Second Lieutenant 153 Rep 280 Posts Drives: BMW G30 520i 2019 Join Date: Aug 2020 Location: Hong Kong iTrader: (0)	there are a couple things to think about for running ethanol there's the tune (if you have an aggressive tune, do u want to run a sensor that makes the tune less aggressive if you forget to mix in ethanol or mix in too little ?) there's the hardware (pumps/lines), lines should be able to handle E85 in modern cars but the pump may or may not suffer more wear/deterioration (this is dependent on make/model of the car obviously)
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