Openflash FLEXFUEL OTS Tunes! - Page 6 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Aussie · 10-13-2016, 04:21 PM

Thanks Steve,

So the formula should be:

Ethanol_Percentage = round(max(0, min(100, (V_in - Voff) * 100 / Vrange))))

Where Voff would be ~ 0.5 Volts
Vrange would be 4 Volts
V_in is the input from the flex fuel kit
The min and max functions clamp the results to lie within 0-100 percent
The round function would add a small amount of hysteresis to cope with sampling noise.

ztan · 10-14-2016, 05:19 AM

Quote:

Originally Posted by Aussie

@ztan thanks so much for the work you did in helping to create the flex fuel kit for the OFT community. I will be installing the OpenFlash/FFTEC XRP Flex Fuel Kit on the weekend and am looking forward to stress free flex fuel driving.

I am also currently building a simple Arduino based climate control system that will toggle the A/C on and off to maintain a user defined temperature for my 2013 FR-S. As that system will include a small LCD screen I was also wanting to display the current fuel ethanol percentage. I understand the output from the kit is a 0.5v to 4.5v voltage level. My question is:

Is there a formula between voltage and ethanol content that I can use? If it is a linear equation (EthanolPercentage = xV + y) I can easily find x and y by looking at the percentage displayed on the OFT with a couple of different fuel mixtures, if it isn't it will take a bit longer. I'm hoping this information is something you can share.

Thanks

Hi mate,

The relationship is linear. You can either decode the frequency coming out of the ethanol sensor, or the voltage being sent to the ECU pin A35-20 from the sender. The relationship will be in the ROMRaider .xml file (multiplier + offset values under "Ethanol Sensor Scaling").

Hope everything works well for you.

Aussie · 10-16-2016, 07:58 PM

Quote:

Originally Posted by MaxxCann

Has anyone started the custom tune process yet?

Yesterday I installed my kit and loaded the base tune from Shiv. I just sent him a couple of logs - 91 Octane and after filling with a half tank an E58 log.

Wayno · 10-21-2016, 11:30 AM

http://datazap.me/u/wayne/stg2-ace-f...2&zoom=853-971

scubie.brz · 10-21-2016, 07:11 PM

I can help im local in the bay area too if it helps I have high flow air filter and supertek intake pipe with tomei type 80 exhaust.

Sent from my HTC One_M8 using Tapatalk

Aussie · 11-07-2016, 01:22 AM

I just posted a guide for building and installing a system that will display the current ethanol content as read by the OFT flex fuel sensor.

(It also automates the manual AC system)

http://www.ft86club.com/forums/showthread.php?t=112702

infinitewhiskey · 11-10-2016, 02:53 PM

Sent Shiv an email a few days ago, still waiting for response. Is this still available?

Synkopy · 11-16-2016, 08:45 PM

Quote:

Originally Posted by Aussie

I just posted a guide for building and installing a system that will display the current ethanol content as read by the OFT flex fuel sensor.

(It also automates the manual AC system)

I used some of what you were saying to confirm my calculations. Set 0v parameter to -12.5 and 5v parameter to 112.5 on my P3Cars display. Tapped the signal from the ethanol analyzer. Works like a charm.

Aussie · 11-16-2016, 08:52 PM

Quote:

Originally Posted by Synkopy

I used some of what you were saying to confirm my calculations. Set 0v parameter to -12.5 and 5v parameter to 112.5 on my P3Cars display. Tapped the signal from the ethanol analyzer. Works like a charm.

The P3Cars display looks very cool. I'm glad you were able to display the ethanol content.

phrosty · 11-24-2016, 03:26 PM

Has this been ported over to AT yet? My finger is on the trigger, especially with it on sale @ OpenFlash right now.

Wayno · 11-24-2016, 05:39 PM

Quote:

Originally Posted by phrosty

Has this been ported over to AT yet? My finger is on the trigger, especially with it on sale @ OpenFlash right now.

Months ago

MaxxCann · 01-05-2017, 08:30 AM

I've been trying to get my e-tune since this promotion started and have recieved no response in three months. Did anyone get their files?

Lonewolf · 01-05-2017, 11:10 AM

Quote:

Originally Posted by MaxxCann

I've been trying to get my e-tune since this promotion started and have recieved no response in three months. Did anyone get their files?

Files from Shiv?

Aussie · 01-05-2017, 04:01 PM

Quote:

Originally Posted by MaxxCann

I've been trying to get my e-tune since this promotion started and have recieved no response in three months. Did anyone get their files?

I got my base FF tune for my car from Shiv in October. I then sent him the logs he asked for. He was able to confirm that the base FF tune was fine for my car.

10-21-2016, 11:30 AM	#74
Wayno Senior Member Join Date: Apr 2014 Drives: Toyota 86 GTS Location: Australia Posts: 1,129 Thanks: 453 Thanked 895 Times in 424 Posts Mentioned: 211 Post(s) Tagged: 0 Thread(s)	http://datazap.me/u/wayne/stg2-ace-f...2&zoom=853-971 __________________ rom downloads, information and examples Toyota 86 GTS OFT - Guide To Dialling In OTS Base Tune OFT - Example Alternate Maps for AT, 98RON, E85, MAF Scales

11-10-2016, 02:53 PM	#77
infinitewhiskey Member Join Date: Mar 2016 Drives: 2016 Oceanic FR-S Location: Los Angeles Posts: 47 Thanks: 22 Thanked 14 Times in 10 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Sent Shiv an email a few days ago, still waiting for response. Is this still available? Last edited by infinitewhiskey; 11-10-2016 at 06:58 PM.

11-24-2016, 03:26 PM	#80
phrosty Senior Member Join Date: Apr 2013 Drives: 2013 FR-S Location: Seattle Posts: 806 Thanks: 202 Thanked 320 Times in 199 Posts Mentioned: 18 Post(s) Tagged: 1 Thread(s)	Has this been ported over to AT yet? My finger is on the trigger, especially with it on sale @ OpenFlash right now. __________________ 2013 Whiteout 6AT FR-S \| Perrin Inlet Tube + 2.75" CAI \| OpenFlash Header \| P&L Catback \| 4.88 Final Drive \| Dialed in OFT 2.0x Stage 2 E85 \| 18x8 Enkei Raijin + 225/40 Michelin Pilot Super Sport \| 17x7 Stock + 215/45 Michelin X-Ice Xi-2

01-05-2017, 08:30 AM	#82
MaxxCann Member Join Date: Mar 2015 Drives: 2013 Scion FR-S Location: Stockton, ca Posts: 38 Thanks: 6 Thanked 7 Times in 5 Posts Mentioned: 1 Post(s) Tagged: 1 Thread(s)	I've been trying to get my e-tune since this promotion started and have recieved no response in three months. Did anyone get their files? __________________ 2013 Asphalt FR-86 (badge conversion) \| TRD wheels \| TRD CAI \| TRD exhaust \| TRD lowering springs \| TRD front strut tower brace \| TRD door stabilizers \| TRD member brace kit \| TRD spoiler \| TRD quick shifter \| TRD door speaker panels \| TRD seat gap fillers \| GT86 Armrest \| Red Perrin Lightweight Pulleys, Drift Button, and Reverse Lockout \| Winjet Foglights \| Full LED swap \| Custom dash and HVAC LEDs

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10-21-2016, 07:11 PM	#75
scubie.brz Member Join Date: Jan 2016 Drives: hyper blue BRZ Location: San Jose, CA Posts: 44 Thanks: 6 Thanked 1 Time in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I can help im local in the bay area too if it helps I have high flow air filter and supertek intake pipe with tomei type 80 exhaust. Sent from my HTC One_M8 using Tapatalk

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