JB4 Z4 with E85?

GhostyM · 08-29-2012, 03:14 AM

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BES335xi · 08-29-2012, 04:21 AM

Somebody on N54Tech dyno'd a 2011 z4 35i.....With JB4 and DCI and a 60/40 93/e85 mix and got 386whp | 422wtq...As for not throwing mixture codes, just keep trying from 30% - 50% and just stay with what makes you're car happy and not throw codes.

spool twice · 08-29-2012, 06:37 AM

seems like a low # for an E85 N54 with JB4 tune (some owners are 400+rwhp, but they have DCI)

benzy89 · 08-29-2012, 08:33 AM

Not all E85 is created equally

It can be as high as 85% Ethanol, but as low as 70%

A418t81 · 08-29-2012, 10:11 AM

No mixing in slowly. Go add 5-6 gallons of E85 and fill up the rest with 93. Drive it around for 10 minutes or so and then swap to map 5. You will need to do a few 3rd gear pulls to allow it to adapt. The JB4 and stock ECU will continue to adapt as you drive it around and go to wide open throttle. As the JB4 tailors the map to your car, you will see the autolearn level number increase in the JB4 software. I would go ahead and fill up now and give the car some time to adapt to the changes in octane. It will be become noticeably stronger over the next couple of days.

GhostyM · 08-29-2012, 10:19 PM

I'll try it tonight. Does it work right away or do you have to remap for 5?
By remap, I mean put it to 4 or something then back to 5?

spool twice · 08-29-2012, 10:23 PM

just leave it in Map 5 and do 2-3 WOT 3rd gear runs 10-15mins after pumping. You only need to go to the other maps (ex. Map 1) if you run out of the E85/pump gas mixture and refill with 91-93octane only.

08-29-2012, 03:14 AM	#1
GhostyM Major 539 Rep 1,463 Posts Drives: plenty Join Date: Mar 2007 Location: US iTrader: (0)	. .. Last edited by GhostyM; 10-24-2019 at 12:23 AM..
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08-29-2012, 04:21 AM	#2
BES335xi Colonel 83 Rep 2,132 Posts Drives: FBO+ N54xi Join Date: Mar 2008 Location: Queens, NYC iTrader: (4) Garage List 03/07 E90 335xi [1.00]	Somebody on N54Tech dyno'd a 2011 z4 35i.....With JB4 and DCI and a 60/40 93/e85 mix and got 386whp \| 422wtq...As for not throwing mixture codes, just keep trying from 30% - 50% and just stay with what makes you're car happy and not throw codes. __________________ JB4+usb \| P3 Vent Boost Gauge v2 \| BMS OCC \| BMS DCI \| AMS FMIC \| AR xi CL DP's \| BT Tool \| Edibias/NCSExpert/INPA BMW Coding \| Cyba Quad Exhaust tips \| M-Tech Rear & M3 Front Bumper \| Red Cyba Air Scoops \| Blacklines \| Vinyl Overlays \| ACS Roof Spoiler \| Matte Black Grilles \| LED Side Mirrors \| Rear Euro Fogs \| etc.. .
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08-29-2012, 06:37 AM	#3
spool twice Rainbow Racer 1008 Rep 2,539 Posts Drives: BMW M4cs Join Date: Sep 2010 Location: Tampa Bay, FL Area iTrader: (7) Garage List 2019 M4cs [0.00]	seems like a low # for an E85 N54 with JB4 tune (some owners are 400+rwhp, but they have DCI) __________________ -Loe P.- Prior Car:'14 Audi S5 3.0t DSG [ APR ECU/TCU \| Pullies + basic bolt-on mods \| 10.861@127.90mph ] Current Car: F82 M4cs \| TT-RS \| On Order: i4 M50
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08-29-2012, 08:33 AM	#4
benzy89 Banned 79 Rep 2,396 Posts Drives: '08 E90 335i Join Date: Jan 2012 Location: Northern NJ iTrader: (3) Garage List 2008 BMW 335i [7.50]	Not all E85 is created equally It can be as high as 85% Ethanol, but as low as 70%
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08-29-2012, 10:11 AM	#5
A418t81 Lieutenant Colonel 296 Rep 1,515 Posts Drives: Ever changing fleet Join Date: May 2007 Location: Alabama iTrader: (1) Garage List 2013 335is [0.00]	No mixing in slowly. Go add 5-6 gallons of E85 and fill up the rest with 93. Drive it around for 10 minutes or so and then swap to map 5. You will need to do a few 3rd gear pulls to allow it to adapt. The JB4 and stock ECU will continue to adapt as you drive it around and go to wide open throttle. As the JB4 tailors the map to your car, you will see the autolearn level number increase in the JB4 software. I would go ahead and fill up now and give the car some time to adapt to the changes in octane. It will be become noticeably stronger over the next couple of days. __________________ 23 iX M60, 24 GT3 RS Weissach, 22 Rivian R1T, 23 RS3, 13 E92 M3 Competition: Akra Evo, KW V3, etc
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08-29-2012, 10:19 PM	#6
GhostyM Major 539 Rep 1,463 Posts Drives: plenty Join Date: Mar 2007 Location: US iTrader: (0)	I'll try it tonight. Does it work right away or do you have to remap for 5? By remap, I mean put it to 4 or something then back to 5?
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08-29-2012, 10:23 PM	#7
spool twice Rainbow Racer 1008 Rep 2,539 Posts Drives: BMW M4cs Join Date: Sep 2010 Location: Tampa Bay, FL Area iTrader: (7) Garage List 2019 M4cs [0.00]	just leave it in Map 5 and do 2-3 WOT 3rd gear runs 10-15mins after pumping. You only need to go to the other maps (ex. Map 1) if you run out of the E85/pump gas mixture and refill with 91-93octane only. __________________ -Loe P.- Prior Car:'14 Audi S5 3.0t DSG [ APR ECU/TCU \| Pullies + basic bolt-on mods \| 10.861@127.90mph ] Current Car: F82 M4cs \| TT-RS \| On Order: i4 M50
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