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pysical pysical is offline
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Default Flex Fuel - 09-12-2017, 06:07 AM

Anyone know what the latest on Flex Fuel is? I am going with some GC turbos and want to take advantage of E85 on these but I don't want to go through the hassle of 50/50 mix and such. I know MHD was working on doing something that would take a 100% E85 tune and scale it according to the E content but wasn't sure. Does this exist for us yet?

And, if this does not exist and I have to get a tune specific to a E85 mix.. What sort of E85 blend can I run with PI, stage 2 LPFP, and running GC turbos.

Thank you.
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Default 09-12-2017, 07:41 AM

With the JB4 you can run its internal virtual flex fuel sensor, or add on a Fuel-IT physical sensor, and the JB4 will use either to rescale port injection as needed for the specific mixture.

With a Stage2 low pressure pump probably starting with a 50% mix is good and then evaluate from there.


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pysical pysical is offline
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Default 09-12-2017, 07:45 AM

Quote:
Originally Posted by Terry @ BMS
With the JB4 you can run its internal virtual flex fuel sensor, or add on a Fuel-IT physical sensor, and the JB4 will use either to rescale port injection as needed for the specific mixture.

With a Stage2 low pressure pump probably starting with a 50% mix is good and then evaluate from there.
Will JB4 modify timing, fuel, boost, etc to run higher HP based on the fuel-it physical sensor? I just want to run whatever fuel and let the car tune based on the E85 content. I don't want to have to mix 50/50, and do all sorts of different tunes.
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Default 09-12-2017, 11:19 AM

We have not tied the E85 value to the boost/timing mapping yet on the normal maps, but you've got map5 there which does that using an auto-tuning technique. We'll be adding another flex fuel auto tuning map in the near future though that relies on the E85 value.


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It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
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Default 09-12-2017, 12:47 PM

Quote:
Originally Posted by Terry @ BMS
With the JB4 you can run its internal virtual flex fuel sensor, or add on a Fuel-IT physical sensor, and the JB4 will use either to rescale port injection as needed for the specific mixture.

With a Stage2 low pressure pump probably starting with a 50% mix is good and then evaluate from there.
As far as I understand, this does not work in many N54 335i cars.
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Default 09-12-2017, 02:06 PM

What does not work in many N54 cars?


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Default 09-14-2017, 02:15 PM

He probably is referring to the KLINE cars.


07 335i AT/CUSTOM 6870 GEN2 ST/VAC ENGINE AND STAGE 3 HEAD/FABFACTORY INTAKE W/PI/1000HP AD FMIC/JB4 G5/FUEL IT STAGE 3 LPFP/HKS BOV/OKADA COILS N GROUND/DUAL OIL COOLERS/RB EXTERNAL PCV/TRANY COOLER/FITCH FUEL CATALYST/M3 FRONT N REAR SUSPENSION W/ROUGE BEARINGS/HOTCHKIS ADJUSTABLE END LINKS/ADUSTABLE REAR TOE ARMS AND CAMBER LINKS/EIBACH SWAYBARS/BC RACING BR COILOVERS AND CAMBER PLATES/AKG REAR SUBFRAME, DIFF, REAR SHOCK BUSHINGS/POWER FLEX BUSHINGS/WAVETRAC REAR DIFF WITH DEFIV BRACE
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bnk bnk is offline
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Default 09-20-2017, 12:08 PM

Quote:
Originally Posted by Terry @ BMS
What does not work in many N54 cars?
These flex fuel features that you talk about. I was about to buy JB4 for getting flex fuel, but I was told that it requires a specific D-CAN bus. I don't know anyone in my neck of the woods who would have that.
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