Lambda VS AFR - Jay's Tech Tips
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- Опубликовано: 8 сен 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.
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.
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
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.
This is exactly what a newby who has a turbo car needs to hear. Thank you so much. You are the real mvp
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.
Wow... Just cleared up my whole misunderstanding with afr gauges and different fuel types. Thanks!
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!
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
that was a good video, and is extremely helpful to someone wanting to learn more about wideband gauges. thanks for sharing TRC.
THE BEST Explanation of AFR
Now I understand why motec doesn't ask what fuel you're using. It runs lambda for o2. This is good knowledge.
Great video, really helped me understand my gauge better all together
Thank you , Just understood AFR - LAMBDA .... so confused for me , now is clear ..... THK Subscribed and liked already
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.
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
Love these videos, keep em coming!
I know this video is 4trs old but it helped me alot tahnk u
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.
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
Great job👍 just what I need and well delivered
Yea, I love learning stuff from Jay
Straight to favorites, learned a lot from this video. Lambda is better to rune all fuels. Thank TRC and Jay
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!
Thank you Jay great simple to understand video😎
1 = perfect mixture
095 - 1.05 = Cruising
0.75 - 0.80 = boost
0.85 - 0.91 = N/A
Love Jay's Tech Tips. Thanks for the info - keep 'em coming!
Very helpful thanks, and clear too.
This is what I needed to see thanks for these videos really helpful
great job i bought my turbo from you guys. i plan to buy another soon as well
I know this stuff pretty well, but I like watching anyway. Great video!
THANKS FOR SHARING YOUR KNOWLEDGE...
awesome explanation Jay, keep the good tips coming!!!
This is the info I was looking for! Great video
Good info and video, gotta know the basics.
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
very informative. thanks
thanks for the tips, keep them coming
Thanks for the refresher!
You're the man! Thank you
very nice and important tips, i use FAST dual wideband, maybe some extra tips around, thanks
awesome videos I always learn something new
some1 send jay a stripper size 36/22/37 all those tips deserve a reward!
Lol
This way very helpful. Thank you.
Thank you very much, great video!!!
Thanks for the info and knowledge 👌💪
This was very usefull information,
awesome video, 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.
Very helpful jay!
👍
Good info. Thank you.
Very helpful video
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!
This guy is a wizard
So much knowledge!!
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?
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!
Great help thank you
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
Great info 👍🏼
great video and info keep it up
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 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.
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)?
this is why that supra they built is a beast
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 stuff
My meter showed hard lean at idle yesterday. Motor seemed to run fine. Wondering if my o2 sensor is going. Good info here
awesome video
You are the Bruce Willis of performance cars
Helpful thanks!
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 :)
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
thanks
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
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
That is a great video, thanks. For a boosted app it seems my tunner Jeremy Satera @ Satera Tunning has it right on the money!
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
Do you have any experience tuning cars at high altitude? How should the target AFR/Lambda vary or change for cars at 4000ft and above? What are your favorite tuning programs for each platform? Thanks!
Wrongwayislost77 it doesn't change with altitude
It stays consistent for your target
It measures the difference in combustion ( air and fuel ) that same amount of air and fuel will vary depending on elevation but the target will not
Jay is so bad ass
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
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.
Gracias. estoy configurando un mercedes con GLP. estaba algo perdido con el narrow band. usare 0.75v. como indicas. gracias
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?
Great video// do you have any tips or a link to install a wideband for a J30 07 accord...👍
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.
Perfect
Can you do this but under nitrous use? Like how to tune with nitrous and fuel jet sizes.
Good Job Thanks
on how to accomplish this will be greatly appreciated
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
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 !
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?
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?
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?
Sorry I'm a newb about this AFR, but how do you determine the ideal AFR for your car? Because from my understanding, ideal AFR on every car is different. Sorry if I missed something from your video. Great video though!
Lambda & AFR values are a guideline, to tell what the engine likes you use an engine or chassis dyno.
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?
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