Lambda VS AFR - Jay's Tech Tips
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- Опубліковано 28 вер 2024
- 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.
This is exactly what a newby who has a turbo car needs to hear. Thank you so much. You are the real mvp
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!
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.
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
Thank you , Just understood AFR - LAMBDA .... so confused for me , now is clear ..... THK Subscribed and liked already
That explains the difference perfectly with not one bit uncovered great job
Now I understand why motec doesn't ask what fuel you're using. It runs lambda for o2. This is good knowledge.
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!
Love these videos, keep em coming!
Straight to favorites, learned a lot from this video. Lambda is better to rune all fuels. Thank TRC and Jay
Love Jay's Tech Tips. Thanks for the info - keep 'em coming!
Yea, I love learning stuff from Jay
I know this video is 4trs old but it helped me alot tahnk u
This is what I needed to see thanks for these videos really helpful
This is the info I was looking for! Great video
awesome explanation Jay, keep the good tips coming!!!
great job i bought my turbo from you guys. i plan to buy another soon as well
You're the man! Thank you
omg love you i just got my wideband i was so lost till i seen this video
Good video to break it down for people
Good info and video, gotta know the basics.
thanks for the tips, keep them coming
this is why that supra they built is a beast
awesome videos I always learn something new
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!
Good info. Thank you.
Thank you very much, great video!!!
This was very usefull information,
thanks
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.
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
This guys legit
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
That is a great video, thanks. For a boosted app it seems my tunner Jeremy Satera @ Satera Tunning has it right on the money!
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?
Wasn't this done last week?
Thank you need this video I am lost
34 Nissan Leaf owners disliked this video.
I see a lot of dual sensor AFR / Lambda gauges on the market. What is the benefit of having an O2 sensor in both banks (V8), if any?
Besides any major reasons, to help in troubleshooting.
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?
How do we give you a call?
nice
Hi there, very informative video and it was indeed easy to understand. Maybe you can help me with oil and temperature sensor readings in terms of knowing when your oil is really low. I was told that the car will knock first and then the oil light will come on in the car.
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.
So if I'm tuning say a boosted honda on e85 shoot for a .75-.80 or a 12.5 afr thanks for your time
No , just tune in Lambda as he said .
If you keep it inn AFR the guage is configured for Gas/Petrol scaling.
When you change it to Lambda like on the Aem gauges it only sees 1
At WOT my AFR is 10.05 is it.normal??or can i target other AFR
Gerencia Imágenes Publicitarias 10.05 AFR at WOT on a naturally aspirated engine is very rich. 12 to 13 is better for power at WOT on a naturally aspirated engine.
Thought that diesel would have a higher stoichiometric value than that like 19.0-1 or something or is this again very heavily influenced by different engines as mentioned in the video?
+TriniRogue
Stoich is directly related to the fuel only.
A given engine configuration, how it is used and what the instantaneous operating conditions are may dictate an AFR value that that is above or below stoich.
+TriniRogue stoich is about the same but because of the way diesel engines work it's normal for them to run slightly lean like 19:1. as you said.
Thanks for the insight guys appreciated :)
+1 apart from where you said "slightly".
19:1 is very lean, (but totally normal for a diesel).
noxious89123
>50:1 AFR is very lean for a healthy diesel engine at idle,
So I have a 2010 wrx and my aem Air to fuel ratio gauge is Reading 14.3 to 15.2 but it doesn’t show me how much fuel going on to my moter. Can someone help me.
Adventure Joe it's not going to show you how much fuel, just the ratio of air to fuel. The higher the number the more lean you're running and the lower the number the richer (or "fatter") you are running. You don't want to get too much higher than 15 when applying throttle. If it is getting higher than that you are lean somewhere in your circuits. For gasoline 14.7 is the ideal number. If anything, running a little richer is usually better than running too lean. Running lean creates a lot of heat and even backfire and possibly surging.
Can you tune any car to e85?
As long as you have enough fuel pump & injectors to supply the extra 35-40%
14.7:1 is in weight not in parts. 14.7 kg air to 1 kg of gas.
I mean it could be. 14.7 parts of air to 1 part of fuel is equal to 14.7g of air to 1g of fuel
@@davidgaal4953 no it isnt. Parts is most of the times in volume. one liter of air is different than one kg of air
@@TIGFab97 oh really... So you want to tell me why parts per million is number of molecules per million molecules?
@@TIGFab97isn’t it still the same ratio ?
@@stocke46 nope
Talk slow and explain not just reading from the monitor!!!!!!
Yaawwwnn. Where are the racing videos. I'd rather watch Engineering Explained for tech tips, not these fillers.
+Brack Metal Dude, quitcherbitchin' we're trying to learn something here. This channel posts all kinds of videos and they post them for free. Have some appreciation for the content.
Lol, that's why I go to Engineering Explained if I want to learn something. I subscribed to this channel for racing. TRC might as well have another tip series with Bill Nye.
More racing on the way, keep an eye out tomorrow!
+Brack Metal You sound like a jerk , whats wrong with learning
+FrequencyOfThought Sorry m8, never said there was anything wrong with learning.
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.
some1 send jay a stripper size 36/22/37 all those tips deserve a reward!
Lol
that was a good video, and is extremely helpful to someone wanting to learn more about wideband gauges. thanks for sharing TRC.
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.
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?
My car is tuned so good that it says 14.7 even when the sensor is unplugged
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.
1 = perfect mixture
095 - 1.05 = Cruising
0.75 - 0.80 = boost
0.85 - 0.91 = N/A
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!
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)?
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’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?
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.
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.
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
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
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 !
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?
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.
Will this gauge be necessary for n/a car
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 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?
I know this stuff pretty well, but I like watching anyway. Great video!
Gracias. estoy configurando un mercedes con GLP. estaba algo perdido con el narrow band. usare 0.75v. como indicas. gracias
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.
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
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
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?
Can a AFR gauge be used on a non ECU car, (a 77' Gen1 sbc in a 85' F-Body?)
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?
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.
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.
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?
very nice and important tips, i use FAST dual wideband, maybe some extra tips around, thanks
Wow... Just cleared up my whole misunderstanding with afr gauges and different fuel types. Thanks!
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
Honestly the info you gave just gave is from experience. Its worth more then just about any book can explain.
Great video// do you have any tips or a link to install a wideband for a J30 07 accord...👍
My car runs from about 12-14 give or take it's 2L turbo is that good to go?
Gustave Pines
A question guys, I run e85, i understood that 9,7 is the stoich ratio but if it's was calibrate on fuel, the display 14,7 correspond to the 9,7 ratio on e85, right?
Check it on the Lambda scale first then see where the gauge is.
@@oldblueaccord2629 Thanks
@@alundrasrt I have an Innvoate guage setup but I never could get it to switch to lambda. I used the computer software setup first to check it and then just use the gauge for realtime. I called, emailed and even called Summit racing to try and figure it out and never did get a reply from Innovate. pretty sad.
can anybody Tell me about the Music at the beginning?:D also nice and interesting vid.
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.
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 99 3/4 ton 4x4 suburban with the 454CI (7.4 to you liter folks.) During normal acceleration from stop light to stop light, every now and then it falls on its face HARD. not like the AC compressor turning on feel, but like I lost 50% of my power. I don't have a gauge and It does not smoke when it falls on its face. Should I invest in a Air/Fuel reader?
what you need is a scan tool try cleaning the mass air flow sensor but its a guess
juan rodriguez I appreciate the response. Already did that. I think it's the fuel pump and a leaking injector. Starts perfectly when cold but when the engine is warmed up, it smokes and sputters to a start. Could be related
yes leaking inj. common on these also ck.fuel pre. regulator inj can be remove send them out for testing and cleaning
juan rodriguez yeah already replaced filter and fuel pressure regulator. Next on my list is the pump then injectors but I got other things to fix right now. Thanks for your imput tho! I had a feeling from the start it was the inj. But was in denial because I didn't want to replace them. Start easy and cheap then work your way up
got a set of 8 rebuilt for 100.$ bosh they work great e bay new were more than the veh worth they can be rebuilt they have a machine that cleans and test flow but they get 25$each
Great video, really helped me understand my gauge better all together