Does an AFR gauge on a classic car make sense ? How, what , install

This video is about the installation of an AFR gauge on a classic car. How , what and does it make sense .

[@iamrichrocker]

you are one of the most diversified guys on YT..and master of all you show...

[@D3Sshooter]

Thanks for the comments, I try

[@groundzero4044]

@@D3Sshooter your video suck , you put too much effort into logging and data and you complete forgot where you wire it to and what color wire is the 12v signal with key on …. Your explanation suck …..

[@D3Sshooter]

@@groundzero4044 Thank you, it takes a little bit of intelligence to understand this video. I feel sorry for you .

[@dps2106]

Wow-this is so helpful and easy to understand! Thank you for being a great teacher!

[@D3Sshooter]

Thanks for the comments

[@daos3300]

it's a bung! you weld on the bung! superb explanation of afr and sensors, look forward to the next part.

[@D3Sshooter]

Cool, thanks

[@Smilesalot1023]

Best videos with the cars I love. Quality images and editing with intelligent explanations. Doesn’t get better than this.

[@D3Sshooter]

TXS for the comments

[@illuin7]

One of the best investments in a carburetor car. With my afr gauge i made a perfect needle. Pulls in every position and no stinky exhaust.

[@D3Sshooter]

Thanks for the comments, and indeed

[@davecourse4234]

really enjoyed this video, you explained it perfectly :)

[@D3Sshooter]

Glad you liked it! Thanks for the comments

[@doglegjake6788]

I'm very thankful for what I've learned from this man

[@D3Sshooter]

TXS for the comments

[@paulhotson5820]

I have seen some that requires no welding, you just have to drill a hole. Enjoyed every minute thank you.

[@D3Sshooter]

Yes indeed, those also exist

[@dord1954]

I’ve never really understood how o2 sensors work but now I really do, a very good video indeed 👍

[@D3Sshooter]

Glad it helped

[@WireWeHere]

Curiosity is the first step to understanding....what went horribly wrong. Just a thought from the days of retrofitting FI. Very kind of you to share your knowledge.

[@D3Sshooter]

Thanks for the comments

[@WireWeHere]

@@D3Sshooter Back at ya for sharing your toys.

[@WouterB76]

You deserve so much more viewers, oncoming car mechanics could learn a lot from your videos.

[@D3Sshooter]

I appreciate that!

[@robertclymer6948]

Hello! By far the best video on YT I have found showing AFR gauge install, carb adjustments, lean, rich etc. Thank you for sharing sir. Cheers from Motown.

[@D3Sshooter]

Wow, thanks!

[@rocral]

Wow what a good teacher. I learned so much from this video.

[@artjones2498]

This is the best description of what they are and how theyer suppossd to work...definatly helps me make my finale choice

[@D3Sshooter]

Thanks for the comments

[@hosrow]

I absolutely love you videos. Very well done, you explain things clearly and percisely. Thank you

[@D3Sshooter]

Sorry for the late reply , as i was away for work. But thanks for the comments.

[@browsfarmpartnership6790]

Thanks very much for a very well presented and informative lesson, which is so timely for me as I have just fitted an Edelbrock Carb to my reconditioned Rover V8 from RPI Engineering to my Replica Pilgrim Cobra. Just when I thought there was nothing left I could do I now have a great little job on my hands, thanks

[@D3Sshooter]

Glad it was helpful!

[@diyhell8712]

Great video - just what I was looking for as I'm thinking of adding an AFR gauge to my classic Reliant Scimitar

[@D3Sshooter]

Glad it was helpful!

[@emilegoguely4032]

Good man! Loving the engineering debrief + complete install + brief diagnosis

[@D3Sshooter]

Thanks for the comments

[@fasttrs]

Thanks for posting this video. Its very informative and Helpful. Now I'm headed to the garage to install one on my 74 TR6 with Weber DCOEs. Cheers from the Corvette City!

[@marcomauri7709]

One of the most clear and well explained videos on the topic. Congrats!

[@hotrodswoodshed7405]

Such a grand INFORMATIVE video! Thank you for being sooo through and steady camera. ❤👍🏻

[@D3Sshooter]

Glad it was helpful!

[@TheReinhardL]

Thank you for your videos I love them. Such perfect and understandable explanations! And photographically perfect close-up shots too!

[@threepotMR2]

The bit you weld on is called a boss here in the uk, and the blanking plug you screw in is called the bung - because it bungs up the hole, bit like stopfung!

[@D3Sshooter]

Thanks for the comments,

[@denk25143]

you just taught me how to use my afr at idle and then drive and see what adjustments to make and the key i learned is i must have a warm engine before i do any adjustments thank you very much im trying to get ready for smog on 1989 mazda b2200 pu obd1

[@StefanMiniCooper]

Thanks for the video, I just ordered myself the same AFR meter from AEM, to tune up my Mini properly.

[@g.johnson143]

Thanks! I have been waiting for this video ever since your teaser! I have an AFR gauge and sensor that should arrive this week. This video is very helpful. Going to use on both my MGB and Clubman Estate.

[@D3Sshooter]

Thanks for the comments, sorry for the late video... good luck... PS don't drive leaded fuel as that will destroy the sensor, and be carefull with lead replacements...

[@g.johnson143]

D3Sshooter , both cylinder heads have hardened seats so I am all set. Tight fit for the sensor under the mini. I need to be strategic with placement so it does not rub on the underside.

[@brianparkinson1594]

Very informative as per usual! Very envious of all your equipment ... a DIYers dream!

[@D3Sshooter]

Glad you enjoyed it, well I am an old timer myself and it did not come all in one day

[@chuckm5874]

What a great presentation. You explain everything in a very easy to understand way. My Mini loves you. Thanks from Downunder.

[@D3Sshooter]

Glad to help! Thanks for the comments

[@TheReinhardL]

A little bit off-tipic (on AFR) but on gauges too: I hold a privat pilot licence and on those reciproking small aircraft engines a very useful gauge is standard: the exhaust gas temperature gauge (for each cylinder). It is so useful because it is always the very first indication that engine problems are aboute to rise. And if the fuel-air mixture is set correctly. And another gauge I would like to have is a voltmeter for the battery charging voltage. Last year the voltage regulator of my classic car distributor quit and of course I couldn't have known it. Due to 16 V charging voltage the battery was overheating on the drive, the battery housing failed and the whole engine bay was full of battery acid. Even an overvoltage warning light would have done the trick.

[@MadDogMark11]

Inspiring subject and so well presented by someone who knows and can explain it too! Very valuable combination! I have a twin-carb set-up, on a Triumph TR3a imported from Canada to UK. It has a pair of different SU carbs than were originally fitted. Burlen say they are OK as they are AUC86*. (From a Morgan +4. apparently). Looking forward to getting to grips with the AFR set-up soon!

[@januszprominski1952]

Really enjoyed this one. Always good in everything.

[@D3Sshooter]

Glad you enjoyed it

[@rotorblade9508]

I have loaded a look up table for a NB in my tuning software that gives me the AFR, and comparing it to my WB, the values are pretty close even up to 12.5:1. It can definitely help. The oscillations I get at idle or closed loop, if you look at the voltage the amplitudes look pretty high, however, when converted to AFR I actually see variations only between 13.5 and 15.5:1, idling around 14.7, most of the time between 14-14:8. The same thing I see on the wide band. The NB plot in my datalogs follows the WB AFR closely within 0.2:1 even at WOT where the AFR is 12.5 during PE. The NB is also slighy faster, possibly because of shorter cable.

[@MrNursi]

Superb explanation thanks. i have an AEM AFR gauge on my mini and I've been longing to know how to log and fine-tune the HIF44; I'm off to watch the next video

[@D3Sshooter]

Glad it helped

[@hosrow]

There appear to be different model aem guages. I have a hif44 as well. What model Guage and sensor did you get? Did the sensor and Guage come with all the wiring you needed?

[@DannyDanny-tz3nt]

Whodinni

[@fredjones7307]

That was very professional and interesting. I'll definitely watch that again, hopefully when my Rhodesian Ridgeback pup isn't jumping all over me..

[@syncrosimon]

I fitted an AFR to my VW T3 Syncro, it’s nice to know what is going on. Thanks for sharing. 🇬🇧🇬🇧😎😎

[@D3Sshooter]

Thanks for the comments, and happy with it ?

[@syncrosimon]

D3Sshooter kzbin.info/www/bejne/bXiWaoCZj8-KrsU I had a lot of fun understanding the Fuel Injection system, and finding that it works very well.

[@ford351cleveland]

by Far the best Video on KZbin thank you very much. the you very very much for your video's I subbed to your channel, you definitely deserve more subs then what you have

[@D3Sshooter]

Wow, thanks!

[@neilduncan8657]

I consider my air fuel ratio gauge and my vacuum gauge to be very helpful and informative great for tuning (Haltech controlled fuel injection) I have a Ford V8 swapped 1984 Datsun 200SX S12 always consider both Vacuum and AFR gauges!!!

[@D3Sshooter]

Thank you for the comments.

[@IngeBall]

Long time no see. I didn't get any notifikation on this one, strange. Anyhoo quality vid as always.

[@D3Sshooter]

Welcome back!

[@Cavalier_Steve]

I looked at these to help tune my engine on the car you have confirmed my thoughts so thank you! The little lug that you welded on we call it a boss in the U.K. not that it matters 🙂 fantastic video liked! And subscribed. Steve.

[@emma.j.nation]

Steven Watson and Americans call it a “bung” which, to me, means something to plug up a hole ...

[@Cavalier_Steve]

@@emma.j.nation I had a feeling that other country's would have different names for it, but I agree with you that a "bung" is to plug up a hole as you said its interesting though how language differs from country to country. Cheers.

[@D3Sshooter]

Glad I could help! Thanks for the comments and the boss...

[@D3Sshooter]

Thanks for the comments, US, UK, AUST,NZ they all have differet words fo it , it seems

[@martinfidel7086]

@@emma.j.nation Or a bung is amount of money used to "pay off" some official :D

[@dquad]

With EFI systems we generally aim for around 13.5:1 at idle to get most stable idle, will still idle reasonably at a fairly wide range of AFRs though.

[@D3Sshooter]

Thanks for the comments, indeed the stoich value is all about the most efficient mixture. However that does not mean that the engine is running or performing at its best...

[@ShaunCymruDS8]

Really interesting explanation which I learned something today:). Many years ago I did fit this same AEM AFR to my long gone Twin Turbo Supra (along with many modifications) and found it to be very accurate and reliable, so another recommendation from me for this specific brand. I see the ‘scope out again :)...now if only you can squeeze in a segment with it on an “old Rusty” video lol

[@D3Sshooter]

Thanks for the comments, indeed Old Rusty is on its way...

[@jimclarke1108]

V8 MG, great sound, excellent mixture

[@miteor]

Fantastic as always - really interesting 😊

[@D3Sshooter]

Thank you! Cheers!

[@nenolucero]

Very nice, informative videos! Thank you very much Sir.

[@ericmaldonado1373]

Excellent video, well explained, thanks for sharing 👍

[@D3Sshooter]

Glad it was helpful!

[@notajp]

The weld on fitting is called a bung over here in the US.

[@deankdx]

same for Australia, i like the way it was shaped to the pipe before welding.

[@D3Sshooter]

Thanks for the comments, a BUNG .... now I know TXS

[@D3Sshooter]

TXS

[@1marcelfilms]

It makes sense in that it looks cool and gauges are cool. Volt meter, oil pressure, Now AFR ratio.

[@kerrygleeson4409]

Always very interesting Steve 👀🇦🇺

[@D3Sshooter]

Glad you enjoyed it

[@sherardhubbert7575]

As always great educational video!!! Thanks

[@D3Sshooter]

Glad you enjoyed it!

[@danielhass4812]

I have a type 1 air cooled beetle, and because of the rear engine and my exhaust design, the only feasible place I could put an 02 bung is in my actual muffler. I don’t have a conjoined header… the 4 pipes combine individually at the muffler. Will this location for an 02 sensor give me good data for a wideband AFR gauge?

[@D3Sshooter]

It can, but is not as efficient... but as long as your muffler is airtight it should be no issue

[@stevenbongiorno9277]

Thanks! I learned a lot. I’m gonna try putting one , or two on my car

[@Tablesaw818]

Great video. Thank you for the detailed explanation

[@joemason9187]

Awsome I am converting my mk6 transit to ve pump also some hho at about 5Amps so would possibly give me view of what's going on as won't be using the ecu...Great vid

[@TheReinhardL]

Having seen your video I am just wondering if the AFR you built does about the same trick as the exhaust gas temperature gauges I mentioned. Their functioning is of course different. The AFR you are showing uses an oxygen sensor and the exhaust gas temperatur gauges use temperature sensors (installed after the exhaust valves).

[@tomgraham6833]

I have been doing very similar work on an E-Type 4.2 Jag with triple SU carbs. I am using INOVATE Motorsports hardware with their Logworks 3 software which enables use of my Laptop to capture data. On the Jag it is a little more complex because of the dual, entirely separate exhausts, one for the front 3 cylinders and one for the back 3 but, fed by 3 carbs so that makes adjustment a bit more involved. I presume by your description you are using a non SU carb, perhaps a Weber. In my case I get the same momentary lean mixture on acceleration,l even as lean as 17/1 but car runs perfectly. With the SU perhaps changine daspot oil viscosity might cause a positive change but not particularly worried about this. At idle I am close to 13/1 a bit rich but any leaner and the car does not idle well and using the tried and true lifting of the SU piston I get no engine accleration whatsoever, jusr a decrease in RPM; sign of a lean idle setting. Your explanation was great but think that for best performance a bit rich is better, as you may have suggested. Looking forward to your next video, might you make some particular reference pertaining to SU carbs. Same basics just a little different in the details. Thanks

[@D3Sshooter]

Thanks for the comments Tom, a lot of good points... Mine is SU and a lot simpler then your car.... One point I should have stated is that the Stoich 14,7:1 is the most efficient burn mixture ... however that does not mean that it delivers the best power or the best engine running ( as you stated, running a bit rich, is better then to lean (temp))...

[@johnathonmounce2265]

Power is on the lean side

[@taunuslunatic404]

Some people say an AFR gauge is only useful on vee engines, not inline ones. This video proves them wrong.

[@D3Sshooter]

Thanks for the comments, Indeed

[@taunuslunatic404]

@@D3Sshooter Do you use vacuum gauges?

[@scuderiapraga6815]

Another great video - but one question - on my Weber 40 IDF turning clockwise is leaning the mixture, turning anticlockwise is making it richer. I guess other carbs have it different. Check your spark plugs for the condition.

[@D3Sshooter]

Thank you for the comments. and yes there are variants on carbs

[@GMatje59]

Nice video, well explained. Thank you!

[@D3Sshooter]

Thanks for the comments

[@osmidtb]

you are a great Teacher. Thanks for the video. so, i just wanna ask, is AFR Gauge necessary or useful for the old diesel engine (not commonrail and doesnt have ECU)?

[@tonysajkowski3534]

Like your easy to understand exsplaining of afr thanks

[@paulmuff9883]

Very good video and nicely explained 👍👍😀

[@D3Sshooter]

Thanks for the comments

[@oblvnnwtnjhn]

Great video! I just installed my wideband to tune my Weber 38 DGAS installed on my 2.3L 61' Willys Jeep CJ5, according to the AFR, I needed to go leaner on the idle jets, moved to 45, 1 turn out on both mixture screws, now within range. Still rich when I accelerate, running base/ stock 145 main jets. Base/stock air correction jets are 170's. Redline Weber the sole US importer told me the 38 as shipped should be close, but I've found and smelled it to be rich out of the box for my application. I do have a mild cam, 2" exhaust hence the upgrade to the 38 vs 32/36. Not much information out there for regarding these early Jeeps with similar modifications and tuning the 38. I am unclear at what point the air correctors come into play? I assume the main jets not until close to WOT?

[@esnevip]

Fantastic video, you've earned a sub. Make sure you only use the audio from the lab mic, this one has the camera audio as well

[@D3Sshooter]

Thanks for the comments

[@Mr.Unique.89]

very nice and informative video .. keep up the good work 👌

[@D3Sshooter]

Thank you, I will. Thanks for the comments

[@kan815k]

On my car (2012) 1.6Di engine, have 2 sensors. How can I find out if its a wide or narrow band sensor? I want to install AFR gauge and getting the signal from existing sensor via piggyback from cables?

[@GlesgaNews]

Great Video Shooter... I have a MK2 3.4 Jag with Twin SU carbs. Ive seen your SU instruction videos but wondering if you will be doing one for Twin SU Tuning? GN

[@D3Sshooter]

Thanks for the comments, yes I will make one

[@primo_channel]

Excelent explanation, thanks very much.

[@whitneydesignlabs8738]

Thanks for the explanation. Very interesting.

[@robertbandusky9565]

Great as always! I’m going to install on my 1973 Volvo P1800es with 38/38 dges clone carb thanks again😎 If it gets lean under acceleration, so I need a larger main jet or a smaller air correction jet?

[@D3Sshooter]

Thank you, under acceleration its the acceleration pump that shoots in more fuel, so that would need to be the part to adjust. for cruising and normal driving or nearing the end of an acceleration the main jet and air correction jet define the mixture. Hence, you can increase the main jet .

[@hefinjones6213]

Where did you connect the live and ground wires please?

[@D3Sshooter]

Thank you, Life wire to the contact (Key in ignition position ) and the ground anywhere to the chassis

[@AimlessMoto]

When you say "above" and "below" Stoich, it's very confusing as numbers go higher it's below Stoich in that it's a higher number (more air:fuel) and as the numbers go lower it's above Stoich (more fuel:air).

[@D3Sshooter]

Thanks for the comments, and yes it is relative

[@senselessmonkee]

you were adjusting idle mixture screws to change the reading on the O2 sensor?

[@D3Sshooter]

yes I did at idle

[@garyhoward4064]

On old engines, it seems that the idle will run better (faster) in the low to mid thirteens. Thought it would be best around 14.7. Wonder why..

[@miftachulullum9588]

keren, penjelasannya jelas dan perfect

[@doglegjake6788]

Excellent video

[@D3Sshooter]

Thank you very much!

[@billywhizz98]

Great video Demon-tweeks is near to where I live

[@D3Sshooter]

Oh wow!Thanks for the comments

[@hakimnor598]

You are supperrb sir..thank from Malaysia.

[@gorangunnerod3940]

Thanks for a great video

Greate video! Thansk very much for it.

[@D3Sshooter]

Thank you for the comments.

[@bloodreighn]

would be interested in how you fix that lean acceleration issue, my mini is really bad for it

[@D3Sshooter]

That will be the next video or so .. Thanks for the comments

[@tarzan30809]

Outstanding!!

[@captainwyattoutdoors1636]

excellent video!

[@ronenfe]

I already have an O2 sensor in my electronic fuel injection old car with 2 wires. It's an old car and one of the wires is supposed to go to ground and the other is the signal. I connected a narrowband gauge to one of the wires but it looks like a very low voltage is measured, because the needle shows lean. I don't see any difference when accelerating. What can be wrong?

[@D3Sshooter]

Thanks for the comments, in this video I address the wideband O2 sensor... and that has more leads as it has a heating element inside. In your case that sounds like a narrowband O2 sensor and your gauge may not be suitable for the O2 sensor output. If you have the brand and partnumber of the sensor, then I can provide more info

[@ronenfe]

@@D3Sshooter yes. It's a narrow band o2 sensor. Ecu shows voltage between 0.3v and 0.7v. I will try to measure voltage in the leads with a voltmeter. And see what I get.

[@davidteixiera8398]

Awesome video thanks now I know what to look for

[@AzeezOverseas]

Is using these kind of gauges on a motorcycle can be helpful to adjust carburetors? Or vacuum gauges are recommended?

[@D3Sshooter]

yes you can, its all the same

[@skippywinters]

As always, huge fan of your videos. Question: how will you adjust the carburetor for more fuel during acceleration? Changing injectors? And imagining cruise ratio is lean or rich: how do you adjust that? Thanks in advance

[@D3Sshooter]

There are two elements that you can play with , the piston spring (SU carbs), the damper oil viscosity and the needle profile. Check the video's on the SU for details. The main point is that acceleration creates more vacuum, and as such the damper moves upwards , lifting the needle to another station ( position). Hence more fuel can be taken out of the jet... however if the piston lifts up to fast we will lose airspeed and hence the venturi effect reduces. Thus less fuel in the mixture despite the fact that jet /needle is having a larger opening. Therefore the lift of the damper needs to be checked during acceleration, if that goes to fast then more dense oil is needed in the demper. If it goes Wide Open, then the pistion spring is to weak...

[@eddkennedy6458]

@@D3Sshooter Brilliant explanation, thank you. i might invest in one of these for my riley elf, this would be more accurate than the Gunson colortune.

[@rjgarciasr]

I have an AFR meter I would like to use on my '73 Super Beetle. Where would be a good location on the OEM stock exhaust?

[@mikescudder4621]

I´m going to put one each side since i have dual carbs...

[@FeeeshEP3]

Very informative, thank you for sharing!

[@D3Sshooter]

Glad it was helpful!

[@rdperformance8697]

Amazing video ,thanks

[@D3Sshooter]

Thanks for the comments

[@joncart1838]

What kit did you use

[@WouterB76]

Where you said Pulse Code Modulation, i suspect you where meaning Pulse Wdth Modulation.

[@D3Sshooter]

Thanks for the comments , yes indeed PCM is a communication code sorry as I am a communications engineer I missed it.

[@mikescudder4621]

That mgb gt sounds great!

[@Sternhammer89]

Just picked up a second hand AEM AFR with LSU 4.9. Is it ok to power and test it out of the car?

[@richardkleihorst1304]

does ignition timing has an effect on the measurement of AFR in the exhaust?

[@D3Sshooter]

Yes it can to some extend, but not that drastic. It all depends a bit what you means with Ignition timing. Before any test and work on the fuel system always make sure that the ignition timing is correct

[@superchargerone]

Love your videos. was going through your old videos and discovered this! I have been thinking of fitting AFR gauge to a 4 cylinder alfa to tune the twin webers dcoe carbs. Wondering if you think 1 AFR unit alone fitted at the same 2 to 1 collector position in your video would have sufficient resolution in realtime to tune individual throttle body carbs like the twin webers feeding individual cylinders since I need to tune 4 carbs in real time vs tuning a single carb feeding all cylinders.

[@D3Sshooter]

I would say that it will work as things will average, of course it would be better one sensor per two cylinders. . So if you can , use two sensors

[@rudimartens3577]

Heel interessant. Dank u voor de nuttige info. Heb ik het juist voor hebbbent u de Nederlandse taal ook machtig? Zelf heb ik en mijn Rover P6 vrienden de Rover P6 automaat en “S” V8 en een 4 cilinder. We zijn dan ook erg geïnteresseerd om dit ook te installeren. Vriendelijke groeten van wege de Wattsapp groep p6 vrienden.

[@D3Sshooter]

Bedankt , en ja ik spreek ook nederlands. Dit werkt heel goed maar wel op de juiste plaats installeren

[@johnscully1677]

Very interesting.

[@D3Sshooter]

Glad you think so!

[@nantosatrio6818]

Still curious how to adjust your carb since when you accelerate its becomes leaner. Is that mean you have to increase the main jet or any specific trick or something? If I assume you have increase the main jet, how about the effect to your idle condition -> will it become richer?

[@D3Sshooter]

Thanks for the comments, yes indeed ... the video on tuning is coming out soon

[@richardengland7077]

Clear and concise.

[@hosrow]

What model of aem Guage did you install? I don't see a link to the parts you used?

[@D3Sshooter]

I try not to promote product but this is a AEM ..Sorry for the late reply , as i was away for work. But thanks for the comments.