AFR gauge or Lamda Gauge - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

RupertPupkin · 02-09-2020, 03:47 PM

Would just an AFR gauge suffice, or should I get a Lamda gauge? Planning on biting the bullet and do e85 with the build. What do you guys use?

hunter1660 · 02-09-2020, 05:16 PM

With an AEM setup you can switch between the two....Lamda being simplest to read

RupertPupkin · 02-09-2020, 05:19 PM

Quote:

Originally Posted by hunter1660

With an AEM setup you can switch between the two....Lamda being simplest to read

I was looking at that gauge..

Big Biscuits · 02-09-2020, 05:37 PM

I have that one and love it! Reads through hp tuners with obd2 connector.

RupertPupkin · 02-09-2020, 05:57 PM

Quote:

Originally Posted by Big Biscuits

I have that one and love it! Reads through hp tuners with obd2 connector.

Is this the 1 you have? AEM Wideband UEGO Gauge - Digital Air/Fuel - 30-4110
So from what I read, if the mixture is good, it’s always going to read 1?

What numbers usually pop up during WOT?

dreksnot · 02-09-2020, 06:11 PM

You should see around stoich 1.00 lambda (14.68 air-fuel) during idle and cruise, but it will fluctuate like a sine wave up and down, maybe 2-5% depending on how your O2's are cycling fueling.

WOT readings will read how the car supposed to be tuned: maybe around 0.80 to 0.84 lambda (11.7 to 12.3 AFF) for N/A, maybe 0.74 to 0.78 (10.8 to 11.5 AFR) for FI.

Fueling gauges are lambda reading gauges, and just calculate and output the reading in AFR (derived from lambda). Nice thing about lambda is that you don't need to know the AFR for each fuel - it's just a consistent scale that reads what "percent" of stoichiometric you are running.

RupertPupkin · 02-09-2020, 06:13 PM

Quote:

Originally Posted by dreksnot

You should see around stoich 1.000 lambda (14.68 air-fuel) during idle and cruise, but it will fluctuate like a sine wave up and down, maybe 2-5% depending on how your O2's are cycling fueling.

WOT readings will read how the car supposed to be tuned: maybe around 0.80 to 0.84 lambda (11.75 to 12.3 AFF) for N/A, maybe 0.74 to 0.78 (10.8 to 11.5 AFR) for FI.

Fueling gauges are lambda reading gauges, and just calculate and output the reading in AFR (derived from lambda). Nice thing about lambda is that you don't need to know the AFR for each fuel - it's just a consistent scale that reads what "percent" of stoichiometric you are running.

So .74-.78 for e85 also at wot?

dreksnot · 02-09-2020, 06:15 PM

Quote:

Originally Posted by RupertPupkin

So .74-.78 for e85 also at wot?

Depends on your build, but yes, that's close. Generally, the more boost I push, the more fuel I'll run - to keep things happily fueled and "cool."

eLeSthree · 02-09-2020, 06:18 PM

Quote:

Originally Posted by RupertPupkin

So .74-.78 for e85 also at wot?

Aem Uego also. In my logs i show lambda, on the gauge i left it as afr. Its just more natural to me and I can react quicker to 12.5 than i can .85. I dont know why. With lambda i tend to take .5 seconds to calculate.

Big Biscuits · 02-09-2020, 06:33 PM

Same here^^^

RupertPupkin · 02-09-2020, 06:51 PM

I’m at ground 0, so idk what numbers I should see, or what’s good. I know that different alcohol percentage could change that reading also..

Greenhornet2 · 02-09-2020, 06:55 PM

It doesn't matter. Once you know what you're supposed to be at you'll know what to look for. My mind works in AFR so if i see lambda i calculate it to AFR so it's better for me to just read AFR and know where i am supposed to be at

Silver14 · 02-09-2020, 07:23 PM

Quote:

Originally Posted by RupertPupkin

Is this the 1 you have? AEM Wideband UEGO Gauge - Digital Air/Fuel - 30-4110
So from what I read, if the mixture is good, it’s always going to read 1?

What numbers usually pop up during WOT?

I have that gauge, no complaints. I am only using 93 octane at this time, haven't switched to e85 yet.

Keep in mind e85 isn't always exactly e85, stoich will change based on the ethanol content. AFR you'll need to do a conversion, with lambda, it doesn't matter.

eLeSthree · 02-10-2020, 06:00 AM

Quote:

Originally Posted by RupertPupkin

I’m at ground 0, so idk what numbers I should see, or what’s good. I know that different alcohol percentage could change that reading also..

then teach yourself to read lambda. 1.0 is cruising/idling and most likely your target in boost will be around .78

Dont get confused with the different stoichs of each fuel. Who is going to tune it?

Have you started a pile of parts yet?

02-09-2020, 03:47 PM	#1
RupertPupkin Drives: 2014 Camaro SS 1Le Join Date: Feb 2016 Location: IL Posts: 1,706	AFR gauge or Lamda Gauge Would just an AFR gauge suffice, or should I get a Lamda gauge? Planning on biting the bullet and do e85 with the build. What do you guys use?

02-09-2020, 05:16 PM	#2
hunter1660 Drives: 2011ss/rs camaro Join Date: Sep 2011 Location: florida Posts: 1,261	With an AEM setup you can switch between the two....Lamda being simplest to read __________________ . OBX LTH,Rotofab,Magnuson Heartbeat.AEM wideband, HP Tuners

02-09-2020, 05:37 PM	#4
Big Biscuits Drives: 2010 1SS LS3 Join Date: Aug 2019 Location: Waxahachie, TX Posts: 280	I have that one and love it! Reads through hp tuners with obd2 connector. __________________ 2010 CGM 1SS 408/4L80E/ZL1 Vortech V-13 94C

02-09-2020, 06:11 PM	#6
dreksnot Served USN - Atomic Chimp Drives: 2021 Camaro ZL1 1LE A10 (stock) Join Date: Jul 2012 Location: Fort Collins, CO Posts: 1,714 View My Garage	You should see around stoich 1.00 lambda (14.68 air-fuel) during idle and cruise, but it will fluctuate like a sine wave up and down, maybe 2-5% depending on how your O2's are cycling fueling. WOT readings will read how the car supposed to be tuned: maybe around 0.80 to 0.84 lambda (11.7 to 12.3 AFF) for N/A, maybe 0.74 to 0.78 (10.8 to 11.5 AFR) for FI. Fueling gauges are lambda reading gauges, and just calculate and output the reading in AFR (derived from lambda). Nice thing about lambda is that you don't need to know the AFR for each fuel - it's just a consistent scale that reads what "percent" of stoichiometric you are running. __________________ > > 2021 Camaro ZL1 1LE A10 > > Past Builds: 2013 Twin-Turbo LSX434 M6 - 1,359rwhp daily

02-09-2020, 06:33 PM	#10
Big Biscuits Drives: 2010 1SS LS3 Join Date: Aug 2019 Location: Waxahachie, TX Posts: 280	Same here^^^ __________________ 2010 CGM 1SS 408/4L80E/ZL1 Vortech V-13 94C

02-09-2020, 06:51 PM	#11
RupertPupkin Drives: 2014 Camaro SS 1Le Join Date: Feb 2016 Location: IL Posts: 1,706	I’m at ground 0, so idk what numbers I should see, or what’s good. I know that different alcohol percentage could change that reading also..

02-09-2020, 06:55 PM	#12
Greenhornet2 Drives: 2011 Camaro 2SS LS3 Whipple Join Date: May 2019 Location: Connecticut Posts: 1,925	It doesn't matter. Once you know what you're supposed to be at you'll know what to look for. My mind works in AFR so if i see lambda i calculate it to AFR so it's better for me to just read AFR and know where i am supposed to be at __________________ Whipple 2.9 CAI ID1050x injectors ZL1 Pump JRE FPCM JMS Voltage booster JRE Rough Idle blower cam BTR .660 springs CHE trunnion kit 1 7/8 Speed Engineering Borla Atak JRE scoop 1.5" lowering springs BMR trailing arms and toe links Cradle inserts 704WHP 603WTQ 93 octane