fuel scalars, mpg gauge and inpa

pwr hungry · 03-29-2014, 11:18 AM

So, when you start messing with the fuel scalars, the mpg gauge accuracy goes to the outhouse...question is:

Do any of you Inpa coding gurus know if there is a way to modify the way the mpg gauge interprets the incoming signal so that it will still be accurate for those running e85, single turbos, etc?

AWTT335i · 03-29-2014, 07:50 PM

Quote:

Originally Posted by pwr hungry

So, when you start messing with the fuel scalars, the mpg gauge accuracy goes to the outhouse...question is:

Do any of you Inpa coding gurus know if there is a way to modify the way the mpg gauge interprets the incoming signal so that it will still be accurate for those running e85, single turbos, etc?

I've never noticed mine becoming more inaccurate then it already is. What issue are you experiencing?

Jeef · 03-29-2014, 09:02 PM

Quote:

Originally Posted by AWTT335i

Quote:

Originally Posted by pwr hungry

So, when you start messing with the fuel scalars, the mpg gauge accuracy goes to the outhouse...question is:

Do any of you Inpa coding gurus know if there is a way to modify the way the mpg gauge interprets the incoming signal so that it will still be accurate for those running e85, single turbos, etc?

I've never noticed mine becoming more inaccurate then it already is. What issue are you experiencing?

Why is yours inaccurate? Mine is off I am trying to figure out a fix!

3000GT MR · 03-29-2014, 09:19 PM

I spent some time earlier picking through the procede maps looking for something. I use a 3D fuel scalar with stock low load scalar and it helped a little, I got 1mpg better. I assume it has to do with pressure sensor calculations and what it feeds the DME on the bus. but during vacuum to 6psi it shouldn't matter. I'll continue to look into it

03-29-2014, 11:18 AM	#1
pwr hungry Banned 42 Rep 1,257 Posts Drives: 335 Join Date: Mar 2013 Location: Amer'ca iTrader: (2)	fuel scalars, mpg gauge and inpa So, when you start messing with the fuel scalars, the mpg gauge accuracy goes to the outhouse...question is: Do any of you Inpa coding gurus know if there is a way to modify the way the mpg gauge interprets the incoming signal so that it will still be accurate for those running e85, single turbos, etc?
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03-29-2014, 09:19 PM	#4
3000GT MR Major 267 Rep 1,392 Posts Drives: 09 335i/3000gt vr4 Join Date: Jun 2012 Location: Sav GA iTrader: (6)	I spent some time earlier picking through the procede maps looking for something. I use a 3D fuel scalar with stock low load scalar and it helped a little, I got 1mpg better. I assume it has to do with pressure sensor calculations and what it feeds the DME on the bus. but during vacuum to 6psi it shouldn't matter. I'll continue to look into it __________________ Have a single turbo and/or tired of burning up O2 sensors? Ask me about the new ADV O2 sensor retro kits! 335i 2010 e92 M-sport Mods: VM Top mount 6466, Aquamist HSF4 w/custom direct port. VRSF IC + Exhaust 335i 2009 e90 665RWHP VFF900 ST RIP .
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