Lambda VS AFR - Jay's Tech Tips
ฝัง
- เผยแพร่เมื่อ 4 ต.ค. 2015
- Do you understand what the display on your Wideband AFR Gauge is telling you? does it get confusing when you switch back and forth between E85 and Gasoline? This week's tech tips will help simplify things for you.
- ยานยนต์และพาหนะ
personally, I love these videos! I find them very interesting even though I'm familiar with most of the content. keep em coming!
Thanks Jay, you explained this in manner that anyone could understand and you did it without being condescending.
These video's are excellent. So awesome to get a different perspective on things even though you may already be familiar with the topic being reviewed. Thanks for the information TRC/ Jay!
I enjoy these videos as Jay knows his shit. Anytime a professional takes time to explain things, you sit and listen. Whether we are familiar with the topic or not. Can usually gain some bit of knowledge.
This is exactly what a newby who has a turbo car needs to hear. Thank you so much. You are the real mvp
Wow... Just cleared up my whole misunderstanding with afr gauges and different fuel types. Thanks!
that was a good video, and is extremely helpful to someone wanting to learn more about wideband gauges. thanks for sharing TRC.
Love Jay's Tech Tips. Thanks for the info - keep 'em coming!
Love the Tech Tips! Great work and perfect explanaitions. Even on the subjects that I have good knowledge, I feel that I learned a lot. Good Job!
Honestly the info you gave just gave is from experience. Its worth more then just about any book can explain.
That explains the difference perfectly with not one bit uncovered great job
Love these videos, keep em coming!
Thank you , Just understood AFR - LAMBDA .... so confused for me , now is clear ..... THK Subscribed and liked already
Thanks for making clear that the sensor itself will report the same output level as Stoich no matter the fuel. Few commentators nor WB sensor sellers make that clear and that leads to confusion about AFR calculated by the gauge head unit and its indirect relationship to tuning math. Lambda and 1/Lambda (or Phi) makes table correction super simple.
Case in point that using AFR is routinely misleading, is that most gas these days is E10 (and getting worse, thanks EPA renewable fuels mandate) and therefore more like 14.1:1 at stoich. But your will still get 14.7 on your good ol AFR calculating gauge when your fuel system has trimmed up the mix to E10's stoich.
Great video, really helped me understand my gauge better all together
awesome explanation Jay, keep the good tips coming!!!
This is the info I was looking for! Great video
THE BEST Explanation of AFR
Yea, I love learning stuff from Jay
the question is if Brian Spilner would have known this would he still have lost his floor board
As someone who has some tuning knowledge, that movie hard to watch 😂🤣
BOWMAN-GT just adjust the nos tuning to run 9s bro
john martin so easy right?? Lololol. My favorite is when dom says “it’s a great way to spend 10 thousand dollars” and we all know that build would cost 30k lol
I’m looking into getting a wide and sensor, ive gotten exhaust and header upgrades and my question is will my ecu adjust to the sensor vs the stock narrowband sensor or will it throw a check light. Performance wise will the computer also adapter better fueling. Can I used a wideband sensor with a narrowband harness or that will have to be piggy backed?
Great video Jay. My question is, will the stock o2 sensors give you a good Lambda reading. I've added octane booster and I have an i3 tuner installed. Currently the 91 octane tune. My WOT fuel is 1%, 2%, 3% lean on the 3 rpm settings. 1 to 3k My Lambda reading is .996. The other 2 are between .77 to .79 at 6250 rpm. Thanks!
Hi, thanks a lot for the clear and quick explanation. I understand lambda is a good way to measure a rich/lean condition regardless the fuel or vehicle. Just one quick question though, I took my car for smog inspection today and the result was 1.0, 1.15 lambda (low, high rpm), so what do you recommend should be adjusted/changed in order to pass the test? Other values were:
CO + CO2% 15.0, 12.12
CO2% 14.5, 11.6
NOx ppm 5.0, 56.0
HC 67.0, 78.0
Thanks again.
great job i bought my turbo from you guys. i plan to buy another soon as well
I’ve replace a o2 sensor because of the code but the light comes on again. During warm up the voltage is 1.7. The non affected bank reads o.2 before the replacement the voltage was 2.9. Can an exhaust leak cause these high readings or is that pretty much a damaged ecu. Customer said it came on around the same time his car was rear ended.
I know this stuff pretty well, but I like watching anyway. Great video!
Great job👍 just what I need and well delivered
Thank you Jay great simple to understand video😎
Jay, really appreciate the video, definitely cleared up things for me. I wanted to install an afr for my NA 5.7 hemi stroker, any advice
Hi, nice tips buddy, we wish to optimise IC cars for Natural gas fuel and meet emission tests, should we use a wideband AFR for setting up the gas map, how to change the stoic ratio of 17:1 (for CNG ) in the set up - or do you advice working on Lambda only ? thanks
So if I wanna tune my turbo bike and I'll be using different fuels I should put it on lambda and it will be the same afr from 93 Oct to say C16?
Great video// do you have any tips or a link to install a wideband for a J30 07 accord...👍
I have a 1970 BMW 2002 with two Solex 40 PHH carbs. At idle and low speeds I see 11-12 AFR but on the highway going up grades it leans out, over 17. Should I go to larger main jets?
omg love you i just got my wideband i was so lost till i seen this video
Might be an dump question but im having an issue with my lambda reading
My car would stay at 14.0 AFR at WOT while before it would go up to 12-13 AFR at WOT.
I figured my injectors were dirty due to e85 i got them cleaned and went back to normal. Yesterday i went back on 91 octane (under a 91 calibration) and my AFR went back to 14 AFR at WOT.
At this point im thinking the 02 sensor is bad
Im running hondata flashpro by the way
This is what I needed to see thanks for these videos really helpful
Straight to favorites, learned a lot from this video. Lambda is better to rune all fuels. Thank TRC and Jay
How would you determine target afr or lamda for a given engine at wot? I hear all the time leaner is meaner. Is there any truth to this?
Jay maybe you can clarify, I understand but I want to be absolutely positive. I have a AEM Gail safe on my car now. Just switch to E85. I was surprised to the 14.7 ratio as well. So I still need to target the gasoline AFR? Correct?
Also when I first turn the key on but not start the car the sensor reads 14.7 for a few seconds but if I leave the key on but don’t start the car it will drift up to 18. Like when I’m play on the laptop with the key power on. Does this mean I’m due for a sensor?
Now I understand why motec doesn't ask what fuel you're using. It runs lambda for o2. This is good knowledge.
My meter showed hard lean at idle yesterday. Motor seemed to run fine. Wondering if my o2 sensor is going. Good info here
I have a 450+ whp caliber srt4. Full e85 with all supporting mods. I tune myself along with other caliber srt4s. I'm kinda confused here.. With hp tuners and dodge, I set the lambda, but what would I set the wot ve tables to for example? Say if I'm only wanting to work with lambda? Currently I just set the lambda table to all the same values and adjust the ve tables accordingly
thanks for the tips, keep them coming
I know this is off subject but I like how the background music was a sped up version of a jill scott song lol. Nice chill choice
Edit: Jill Scott - Gettin in the Way
THANKS FOR SHARING YOUR KNOWLEDGE...
Hello, fellas. I need help figuring out which sensor and gauge to use on my 2018 GP1800 Yamaha waverunner, i have a complete stage 2 riva kit installed together with Riva 8800rpm stage 2 tune, just want to be safe and make sure my AFRs are in check, i will be using premium pump gas. Im looking for some advice which sensor and gauge to use as well as how to get the gauge hooked up once the o2 sensor is mounted on the exhaust. I appreciate your time and assistance. Thinks.
Gracias. estoy configurando un mercedes con GLP. estaba algo perdido con el narrow band. usare 0.75v. como indicas. gracias
My car runs from about 12-14 give or take it's 2L turbo is that good to go?
what is the best one to buy just rebuild my engine 5.7 1990 k5 blazer i got edelbrock carb on there i already have headers so the hole is there for the 02 sensor i converted it from tbi to carb.
Thanks for the refresher!
Good info and video, gotta know the basics.
One thing to add to the Stoichiometric Values, 14.7:1 is for normal gas without ethanol, nearly all pumps put up to 10% so Stoich for most fuels is actually 14 to 14.1
so how do i know what air fuel ratio i want my cars 2 stepped and boosted but i bought it w the tune on it and dont know much about the car so i run pump gas the gauge will b right?
Can you do this but under nitrous use? Like how to tune with nitrous and fuel jet sizes.
Very helpful thanks, and clear too.
I know this video is 4trs old but it helped me alot tahnk u
awesome videos I always learn something new
My golf mk7r stage 3 is running lean with a lambda 0.85 all the way when on boost. I cannot figure out the issue. No knocking no codes but the car is very lean. It s not a tune issue as well. What could be the issue?
Hello, if my O2 sensor output varies from 0.1volts to 0.9 volts for about two times per second, meaning from lean to rich , so the AFR is never stoichiometric ,except a fraction of a second on transition, how can i judge the AFR and the engine management is just fine or wrong? Also, what voltage would be for 14.74-”stoich” ? And, this type of sensor is narrow band or a wide band? Thank you !
You mentioned a 14.7 to 1 ratio for gasoline is that by weight or volume ? What if I am running a nitro mix? Does changing the timing change much? Does predetination of lower grades show up on the fuel air ratio? If you use a Butane Oxygen mix will the gauge work and give valid rich lean numbers? Lambda
I'm super late to this party. Say I want to go super nerdy and interpret the volt output values - is that possible? Was wondering if I need a gauge at all or just a spicy Bosch sensor and a voltmeter?
Very helpful jay!
👍
So if I add a gallon of e85 to a tank of 93, am I still targeting 14.7 low and 12.5 high load?
very nice and important tips, i use FAST dual wideband, maybe some extra tips around, thanks
Thank you very much, great video!!!
This way very helpful. Thank you.
Can a AFR gauge be used on a non ECU car, (a 77' Gen1 sbc in a 85' F-Body?)
what lambda would I be looking for diesel?
Thanks for the info and knowledge 👌💪
What is the best gauge you recomend for reading methanol?
very informative. thanks
I have a air fuel ratio gauge reading rich at idle 10.1
idleal stoich must be 14.7 12.5 0r 13.8
how to get that perfect stoich on your gauge i have also a fuel pressur regulator readin 54psi at idle
Good video to break it down for people
Can you post how to calibrate AFR and know this varies significantly from product to product, how often should one calibrate? and where should the sensor be near upstream or is after cat okay? Thanks Jay and TRC team.
Really informative vlog, but...? These days you can no longer get 95 actane gas in Norway, it changed over to E-85... Since the stoich then changes as you say from 14.7:1 to 9.7:1, how on earth can I change the value of the air/fuel ratio gauge to track 9.7:1 so I get the correct reading between rich and lean? Also one more thing... Is it posible to hook up an air to fuel ratio gauge to the existing lambda sensor insted af what a lot of others do, cutting, welding, installing an second sensor just for the gauge??
Thanks in advance!
I don't know how many people I've seen on E85 using a wideband on a pump gas scale wondering why it's laggy consumes gobs of fuel and you can see black coming out the exhaust. I literally stopped trying to explain it to people.
great video and info keep it up
Thanks for the info … i have b20b turbo when i start the car my wideband is at 14,7 than slowly go to 10,7 in like 10-15 seconde than stay there at idle… when i do pull or cruise it seems to be good. Thanks if you can try to help me :)
I got an aem wideband 30-0300 about 5 months ago.
The gauge now says "sens" on it, but before the gauge used to stay heating for over 1 minute or longer.
Any ideas on how to get my wideband to read again?
Thanks!
G2G, I'd check all of your wiring on the gauge and O2 sensor to make sure you don't have a loose connection.
You're the man! Thank you
awesome video, thanks!
This was very usefull information,
Jay, this is one of the best explanations out there for EUGO gauge reading! But if I may, can you confirm @1:25 the stoich ratio you have for E10 pump gasoline? Because I believe E10 is 14.1:1, due to the up-to-10% ethanol component of the fuel. Straight gasoline (E0) stoich should be 14.7:1. Other than that, this video rocks. Keep up the good work!
You're wasting your time asking someone who has no clue.
You're also asking the wrong question.
Stoich for E10 is 14.08xxx. 14.1 is more than close enough to call it correct. That's irrelevant because a "wideband" sensor will still display 14.7 at stoich on E10. Do yourself a favor and stop working in AFR. Lambda is correct for ALL FUELS. AFR is only correct for one single solitary fuel, something that's virtually non-existent today. Ethanol content varies wildly between full ups.
I am wanting a fuel air gauge for my 1 cylinder 5000 watt power generator so I can run lean and get the most power lower my gasoline cost.. Also considering going to Natural gas. You are more expert about this so let me know your suggestions. Might consider an Exhaust engine temperature gauge to avoid burning an engine. This generally loads nicely and kicks up when something big loads the circuit. Generally constant load.
the perfec mixture for nitrous?
Late to the fray but I was under the impression that even the different octanes of gasoline had different stoich ratios? Like 89 vs 93 vs Sunoco 100 octane (260 GT Plus)?
So much knowledge!!
Great info 👍🏼
can anybody Tell me about the Music at the beginning?:D also nice and interesting vid.
Great video. One more question. Does the sensor know when its heated up to its operating temperature? Im asking this because i would like to install it in a different location than recommended, closer to the head of the engine. That means it will naturally by the heat of the exhaust gas, warm up quicker than usual. Can the sensor overheat or will it know when to stop the heater itself?
Yes if you get a sensor like AEM
Thank you for the video, i have xseries in my prelude, while cruising at 3000rpm my sensor is fluctuating between 14.6 to 15.7, is this normal?? Also full open trottle reads around 12??
If your at cruise,light throttle, it should be dead on 14.7 or 1 lambda on a stock type OBD2 vehicle. Wild guess is the sensor needs to be calibrated or its not installed correctly. I always run the Ground wire straight back to the battery to eliminate ground offset. Wideband o2 sensors do go bad alot.
Will this gauge be necessary for n/a car
Very helpful video
Can you please post a video on how to install
Well that was helpful i was trying to figure it out but its because its not really the air fuel ratio really its more or less if all the fuel was burned or not
Do you remote tune we don't have tuners around here I payed for ecu an software so iv been trying to do it myself lol
I have an issue where my o2 will not display any reading on a cold start, but if I cycle the car it will fire up. Any opinions why?
+Clay Patterson If its a heat issue, not sure why it would heat up after a key cycle and not on initial cold starts
Good info. Thank you.
Wasn't this done last week?
I'm not a performance tuner, but instead am looking for peak fuel efficiency. Would I be better off running at stoich or slightly lean?
Slightly lean under cruising conditions, to maximize fuel economy. I target 1.04 to 1.06 while cruising.