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Home > Help Needed / General Tech Chat > Lambda v's AFR | |||||||
![]() 16540 Posts Member #: 4241 King Gaycharger, butt plug dealer, Sheldon Cooper and a BAC but generally a niceish fella if you dont mind a northerner Rotherham, South Yorkshire |
22nd Jul, 2014 at 08:05:12pm
I'm trying to get the AFR gauge in my ECU (SC Typhoon 2) reading the same as my gauge (AEM UEGO Analogue Wideband 30-5130).
On 11th Feb, 2015 robert said:
i tried putting soap on it , and heating it to brown , then slathered my new lube on it ![]() |
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![]() 3673 Posts Member #: 9300 Post Whore Quarry Bonk |
22nd Jul, 2014 at 08:17:39pm
Not sure if this is what youre after andy, but I did find this. http://www.wallaceracing.com/air-fuel-lambda.php On 26th Jan, 2012 Tom Fenton said:
ring problems are down to wear or abuse but although annoying it isn't a show stopper On 5th Aug, 2014 madmk1 said:
Shit the bed! I had snapped the end of my shaft off!! 17.213 @ 71mph, 64bhp n/a (Old Engine) |
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![]() 3673 Posts Member #: 9300 Post Whore Quarry Bonk |
22nd Jul, 2014 at 08:18:32pm
Gasoline option is petrol AFR, and the lambda is obviously self explanatory! On 26th Jan, 2012 Tom Fenton said:
ring problems are down to wear or abuse but although annoying it isn't a show stopper On 5th Aug, 2014 madmk1 said:
Shit the bed! I had snapped the end of my shaft off!! 17.213 @ 71mph, 64bhp n/a (Old Engine) |
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![]() 6748 Posts Member #: 828 Post Whore uranus |
22nd Jul, 2014 at 08:23:13pm
andy ,
Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM |
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![]() 16540 Posts Member #: 4241 King Gaycharger, butt plug dealer, Sheldon Cooper and a BAC but generally a niceish fella if you dont mind a northerner Rotherham, South Yorkshire |
22nd Jul, 2014 at 08:24:07pm
That looks like the daddy. Thanks a lot Carl
Edited by apbellamy on 22nd Jul, 2014. On 11th Feb, 2015 robert said:
i tried putting soap on it , and heating it to brown , then slathered my new lube on it ![]() |
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![]() 16540 Posts Member #: 4241 King Gaycharger, butt plug dealer, Sheldon Cooper and a BAC but generally a niceish fella if you dont mind a northerner Rotherham, South Yorkshire |
22nd Jul, 2014 at 08:31:33pm
All being well I can get some miles on it now. On 11th Feb, 2015 robert said:
i tried putting soap on it , and heating it to brown , then slathered my new lube on it ![]() |
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![]() 3673 Posts Member #: 9300 Post Whore Quarry Bonk |
22nd Jul, 2014 at 08:42:58pm
No problem! Good stuff :) On 26th Jan, 2012 Tom Fenton said:
ring problems are down to wear or abuse but although annoying it isn't a show stopper On 5th Aug, 2014 madmk1 said:
Shit the bed! I had snapped the end of my shaft off!! 17.213 @ 71mph, 64bhp n/a (Old Engine) |
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![]() 9812 Posts Member #: 332 Resident Cylinder Head Modifier Mitsi Evo 7, 911, Cossie. & all the chavs ...... won no problem |
22nd Jul, 2014 at 09:00:58pm
On 22nd Jul, 2014 apbellamy said:
All being well I can get some miles on it now. drive carefully andy ![]()
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![]() 10022 Posts Member #: 1456 Mongo Barnsley, South Flatcapshire |
22nd Jul, 2014 at 09:03:01pm
Nah drive recklessly! If something is worth doing, it's worth doing half of. |
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![]() 16540 Posts Member #: 4241 King Gaycharger, butt plug dealer, Sheldon Cooper and a BAC but generally a niceish fella if you dont mind a northerner Rotherham, South Yorkshire |
22nd Jul, 2014 at 09:09:01pm
I think I'll take Steve's advise until it's run and things have finished falling off it... On 11th Feb, 2015 robert said:
i tried putting soap on it , and heating it to brown , then slathered my new lube on it ![]() |
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1267 Posts Member #: 831 Post Whore Montreal, Canada |
22nd Jul, 2014 at 09:35:30pm
You might be interested to know that all wideband O2 controllers measure Lambda and not AFR. Most of them do display AFR but that's with the assumption that 1.0 Lambda = 14.7 AFR
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![]() 9502 Posts Member #: 1023 Post Whore Doncaster, South Yorkshire |
22nd Jul, 2014 at 09:37:01pm
andy why not look in ugeo instructions? there is a table afr / lambda for each setting Yes i moved to the darkside |
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![]() 11046 Posts Member #: 965 Post Whore Preston On The Brook |
22nd Jul, 2014 at 09:42:59pm
Lambda is the future. AFR is for pansies
On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be... So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'... On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........ |
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3591 Posts Member #: 655 Post Whore Northern Ireland |
23rd Jul, 2014 at 01:21:10am
On 22nd Jul, 2014 jbelanger said:
You might be interested to know that all wideband O2 controllers measure Lambda and not AFR. Most of them do display AFR but that's with the assumption that 1.0 Lambda = 14.7 AFR If you change fuel, you will still see 14.7 AFR at stoic no matter which fuel you use. To see the actual AFR for ethanol, methanol, LPG, CNG, ..., you need to change the calibration in your WBO2 controller and/or your ECU. That's something to remember if you do go to a fuel other than gasoline (petrol). Otherwise you will end up with a fueling that is grossly out of tune. Jean You only need to change the units if you want to see different units. I'm content using petrol AFR's. I dont need to see a reduced resolution lambda value, nor any other scaling regardless of what fuel mix or type I'm using. The normal petrol AFR's is fine for me. Just in exactly the same way some people are happy viewing a lambda based figure. When people change to a different fuel scale/AFR...all the unit is doing is multiplying the lambda value you would see by the stioch value of the new fuel. So it really makes no difference. It's purely personal preference as to what units you want to see Too many get obsessed with having to view lambda, you have to recalibrate, you have to change units. Bollox. Edited by stevieturbo on 23rd Jul, 2014. 9.85 @ 145mph
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1267 Posts Member #: 831 Post Whore Montreal, Canada |
23rd Jul, 2014 at 02:08:39am
On 23rd Jul, 2014 stevieturbo said:
On 22nd Jul, 2014 jbelanger said:
You might be interested to know that all wideband O2 controllers measure Lambda and not AFR. Most of them do display AFR but that's with the assumption that 1.0 Lambda = 14.7 AFR If you change fuel, you will still see 14.7 AFR at stoic no matter which fuel you use. To see the actual AFR for ethanol, methanol, LPG, CNG, ..., you need to change the calibration in your WBO2 controller and/or your ECU. That's something to remember if you do go to a fuel other than gasoline (petrol). Otherwise you will end up with a fueling that is grossly out of tune. Jean You only need to change the units if you want to see different units. I'm content using petrol AFR's. I dont need to see a reduced resolution lambda value, nor any other scaling regardless of what fuel mix or type I'm using. The normal petrol AFR's is fine for me. Just in exactly the same way some people are happy viewing a lambda based figure. When people change to a different fuel scale/AFR...all the unit is doing is multiplying the lambda value you would see by the stioch value of the new fuel. So it really makes no difference. It's purely personal preference as to what units you want to see Too many get obsessed with having to view lambda, you have to recalibrate, you have to change units. Bollox. If you're comfortable doing this and understand what it is, fine. And that is what I would recommend people do so as to not mess up calibration somewhere and have inconsistent data. But some people go to E85 and then they expect to see 9.7 AFR for a stoic mixture and they end with an absurdly rich mixture. They don't understand that they still need to target the same petrol AFR. That was my main point. What you see is not an AFR value but Lambda multiplied by the theoretical 14.7 value (which is likely not the real AFR value for what you get from the pump in many places). Jean |
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![]() 16540 Posts Member #: 4241 King Gaycharger, butt plug dealer, Sheldon Cooper and a BAC but generally a niceish fella if you dont mind a northerner Rotherham, South Yorkshire |
23rd Jul, 2014 at 06:20:55am
On 22nd Jul, 2014 Brett said:
andy why not look in ugeo instructions? there is a table afr / lambda for each setting Not on the instructions that came with the gauge, the ones on their website or the table they sent me. All 3 have volts and AFR only. On 11th Feb, 2015 robert said:
i tried putting soap on it , and heating it to brown , then slathered my new lube on it ![]() |
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![]() 6748 Posts Member #: 828 Post Whore uranus |
23rd Jul, 2014 at 07:10:49am
yup I am setting my lpg on the sqrt ,and not bothering to reset the wb ,just tune to numbers I know leaving it on petrol setting.. although it does appear to be able to run 19 plus on cruise ,which I don't I think I could do on petrol.
On 22nd Jul, 2014 jbelanger said:
You might be interested to know that all wideband O2 controllers measure Lambda and not AFR. Most of them do display AFR but that's with the assumption that 1.0 Lambda = 14.7 AFR If you change fuel, you will still see 14.7 AFR at stoic no matter which fuel you use. To see the actual AFR for ethanol, methanol, LPG, CNG, ..., you need to change the calibration in your WBO2 controller and/or your ECU. That's something to remember if you do go to a fuel other than gasoline (petrol). Otherwise you will end up with a fueling that is grossly out of tune. Jean Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM |
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![]() 9502 Posts Member #: 1023 Post Whore Doncaster, South Yorkshire |
23rd Jul, 2014 at 07:44:35am
its in my pdf Edited by Brett on 23rd Jul, 2014. Yes i moved to the darkside |
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![]() 5988 Posts Member #: 2024 Formally Retired Rural Suffolk |
23rd Jul, 2014 at 08:37:49am
Brett,
Edited by Rod S on 23rd Jul, 2014. Schrödinger's cat - so which one am I ??? |
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![]() 9502 Posts Member #: 1023 Post Whore Doncaster, South Yorkshire |
23rd Jul, 2014 at 09:03:41am
yeah it is, its the data sheet for mine, it still shows afrs vs lambda Yes i moved to the darkside |
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![]() 16540 Posts Member #: 4241 King Gaycharger, butt plug dealer, Sheldon Cooper and a BAC but generally a niceish fella if you dont mind a northerner Rotherham, South Yorkshire |
23rd Jul, 2014 at 06:05:57pm
Thanks Rod. I did the same thing last night and then scaled my table up to 16 rows (wouldn't go bigger). Will try it later on, maybe even go out for a spin. On 11th Feb, 2015 robert said:
i tried putting soap on it , and heating it to brown , then slathered my new lube on it ![]() |
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3591 Posts Member #: 655 Post Whore Northern Ireland |
23rd Jul, 2014 at 09:01:52pm
On 23rd Jul, 2014 robert said:
yup I am setting my lpg on the sqrt ,and not bothering to reset the wb ,just tune to numbers I know leaving it on petrol setting.. although it does appear to be able to run 19 plus on cruise ,which I don't I think I could do on petrol. Robert. On 22nd Jul, 2014 jbelanger said: You might be interested to know that all wideband O2 controllers measure Lambda and not AFR. Most of them do display AFR but that's with the assumption that 1.0 Lambda = 14.7 AFR If you change fuel, you will still see 14.7 AFR at stoic no matter which fuel you use. To see the actual AFR for ethanol, methanol, LPG, CNG, ..., you need to change the calibration in your WBO2 controller and/or your ECU. That's something to remember if you do go to a fuel other than gasoline (petrol). Otherwise you will end up with a fueling that is grossly out of tune. Jean Some petrol engines will be quite happy running very lean at cruise, others wont. But as far as petrol is concerned, OEM dont do it purely for emissions reasons. 14.7 is just the cleanest average, and best for working with the cat. But it's just a case of trial and error as to how lean you can run your engine without misfires etc. But sometimes even if it does run fine...it can be so lean it loses power, you end up using more throttle, more fuel despite same AFR. So trying to run the leanest AFR, doesnt always mean it is the most fuel efficient. 9.85 @ 145mph
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![]() 428 Posts Member #: 10128 Senior Member Dorset |
5th Jan, 2021 at 10:24:29am
Morning all,
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3591 Posts Member #: 655 Post Whore Northern Ireland |
5th Jan, 2021 at 09:42:38pm
lambda value on a gas analyser is an actual proper measurement. On a wideband, it is not.
9.85 @ 145mph
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![]() 6748 Posts Member #: 828 Post Whore uranus |
6th Jan, 2021 at 08:22:13am
e5, i have noticed on the dyno tailpipe reading being a little leaner than downpipe reading , i put thsi down to the ex gases changing a little as they complete burning as they go down the pipe .
Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM |
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