Subject	Re: It seems at some point the ethanol content needs to be known
Posted by	Bad Fish on June 08, 2018 at 10:07 AM
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In Reply To	It seems at some point the ethanol content needs to be known posted by LitlElvis on June 07, 2018 at 11:57 PM
Message	Wideband O2s don't care what fuel you are running. They will measure stoich ratio no matter the fuel. Thus, when running the same injector duty cycle a switch to E85 from E15 will show lean and the ECU can adjust for that to get back to stoich (or whatever ratio in Lambda that is required). It is true, however, that if you want to run closer to stoich on E85 at full boost versus when on E15 you would need the sensor to inform the ECU of mix used. It is much easier looking at AF in lambda as stoich will always be 1:1 no matter the fuel. The O2 sensors are only seeing a Lambda value that we are then converting to AF ratio, which varies depending on the fuel.
Follow Ups	Standalone aem unit vs stock chip/tune ECU - jessethehitman 19:37:16 06/05/18 Re: Standalone aem unit vs stock chip/tune ECU - Bad Fish 09:54:19 06/06/18 This. - MixManMash 13:48:23 06/06/18 Why doesn't Haltech use wideband O2 feedback - not4resaleZ 17:23:29 06/06/18 Different strokes for different folks. - MixManMash 19:00:25 06/06/18 Re: Why doesn't Haltech use wideband O2 feedback - Bad Fish 08:45:57 06/07/18 Re: Why doesn't Haltech use wideband O2 feedback - freak152000 21:40:09 06/07/18 If the sensors find residual oxygen, fuel is added to burn - not4resaleZ 07:02:03 06/08/18 The O2 sensors don't really determine ethanol content - not4resaleZ 09:10:32 06/08/18 Re: The O2 sensors don't really determine ethanol content - Bad Fish 10:00:49 06/08/18 I'm familiar with the concept of MBT and the fact that - not4resaleZ 10:16:48 06/08/18 Re: I'm familiar with the concept of MBT and the fact that - Bad Fish 10:55:03 06/08/18 People road tune all the time. It may not be as accurate - not4resaleZ 11:07:52 06/08/18 Re: People road tune all the time. It may not be as accurate - Bad Fish 11:16:21 06/08/18 Larry larson doesnt use a dyno and I dont see - michaell32 (FL) 19:02:58 06/08/18 Re: Larry larson doesnt use a dyno and I dont see - Bad Fish 20:36:53 06/08/18 Re: Re: Larry larson doesnt use a dyno and I dont see - Bad Fish 20:40:09 06/08/18 Agreed 100 % (n/m) - ztunerz 23:26:39 06/10/18 Not true, you can make a z32 knock on E85 or E70 if you wish - ztunerz 23:24:50 06/10/18 Re: The O2 sensors don't really determine ethanol content - freak152000 10:39:11 06/08/18 I doubt there is any published info, - not4resaleZ 11:02:01 06/08/18 Wideband sensors have 3 sensors in them - BlackholeZ 14:04:30 06/09/18 Re: Re: Why doesn't Haltech use wideband O2 feedback - Rob260 21:54:40 06/09/18 It seems at some point the ethanol content needs to be known - LitlElvis 23:57:23 06/07/18 In my opinion Haltech needs to up their game. (n/m) - not4resaleZ 09:12:19 06/08/18 Re: It seems at some point the ethanol content needs to be known - Bad Fish 10:07:26 06/08/18 You're right - I tend to ignore Lambda because AFR - LitlElvis 12:00:21 06/08/18 Re: You're right - I tend to ignore Lambda because AFR - Bad Fish 15:44:03 06/08/18 using the O2 sensor to determine Eth content rather than - LJZTT 11:28:27 06/08/18 The point is...Who cares what the actual percent ethanol - not4resaleZ 12:12:20 06/08/18 it is if you want to tighten up for LTFT and STFT range>> - ztunerz 23:23:43 06/10/18 Tune a content sensor right and E% "doesn't matter" either - dogpile 17:55:06 06/12/18 you need complete closed loop for that to work correctly - ztunerz 23:21:52 06/10/18 keep in mind this pertains to fuel only >>> - ztunerz 10:08:06 06/11/18 I'd call it "TCL-FTBS". - not4resaleZ 11:00:49 06/11/18 that does not currently happen on any oem cars (n/m) - ztunerz 13:38:56 06/14/18 That's like driving a car by looking at the rearview mirror - sparkie 00:25:29 06/12/18 What if the ECA goes bad? There’s no way to do in a - not4resaleZ 07:16:19 06/12/18 Failed sensor would put the flex fuel vehicle into - BlackholeZ 15:05:21 06/12/18 Every high end race car "road tunes" to some effect.... - induetime 18:27:21 06/08/18 I love my EMU Black I got from Dogpile, it's been flawless - puchy 10:56:22 06/11/18 Re: I love my EMU Black I got from Dogpile, it's been flawless - Bad Fish 15:03:58 06/11/18 Im running dbw you know. Single motor pulling on both tbs... (n/m) - kickerzx 13:37:33 06/12/18 I'll be using both throttles independently of each other - dogpile 17:18:37 06/12/18 Yes. I made a big point to make it apear stock. (n/m) - kickerzx 00:03:49 06/13/18 Btw. Whats your motive behind making a true dual DBW setup? - kickerzx 07:20:43 06/13/18 Traction control, idle control, throttle body size upgrade - dogpile 07:54:42 06/13/18 I did it with the P&P adapter which they have and - puchy 16:41:32 06/12/18 Traction control is up to the user/tuner right now. - dogpile 18:06:45 06/12/18 Re: Traction control is up to the user/tuner right now. - Bad Fish 19:17:34 06/12/18 Didn’t you come to the SZ tuning we had a couple of - puchy 19:34:56 06/12/18 Mine should be ready by late summer / early fall - ni[X]it 07:37:04 06/19/18 Woot! (n/m) - dogpile 13:42:17 06/22/18 Not via written format in a public space, sorry. - dogpile 20:28:28 06/12/18 I would take it to you in Denton instead of the other guy - puchy 19:24:30 06/12/18 Zach doesn't have a dyno. Hell, the 1st year we were the US - dogpile 20:24:28 06/12/18
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