How do I choose the "Right" Air-Fuel Ratio?

[@themotoroilgeek]

THIS is the channel every motor head has been waiting for! Real teaching from someone that actually does the work!

[@EFIU_Ben]

More to come!

[@syedali1299]

Thank you, Lake Speed Jr. You're awesome. This channel is great. I subscribed it

[@PiyushKulkarniixuspk]

But his voice is irritating

[@EFIU_Ben]

Sorry! LoL It's the only one I've got!

[@nepicness]

Fantastic vid, about to install a ls with a cam in an 94 ford. Probably don’t need a masters in fuel ratios/tuning, but this is great for getting the framework down to understand why I’m doing what I’m doing

[@ivaninsa2355]

Nice to see new content after 1 year. Hope to see more.

[@EFIU_Ben]

More to come!

[@ivaninsa2355]

This is the best explanation one could have on what AFR yo choose.

[@c.a.r.s.carsandrelevantspecs]

Very interesting and professionally done video! Thank you so much for this content! ⚙⚙

[@EFIU_Ben]

Our pleasure!

[@leobardomuro1667]

Keep up the good work on these videos learning a lot from you.looking forward to watching and learning more

[@EFIU_Ben]

Lots more on the way!

[@martinrodger9565]

Really well presented. Thank you for sharing your experience and the information behind it.

[@RileyPowersports]

This is an HP Academy level course for free on the internet. Well done!

[@wheresmy10mm]

Please continue these videos. Absolutely priceless information and well formatted and entertaining.

[@EFIU_Ben]

More to come!

[@robinhoode9364]

Great content. Thanks for sharing

[@EFIU_Ben]

Thanks for watching!

[@davidmatthiesen6876]

That was a really interesting report

[@deancrawford2577]

As I'm doing more and more emission tunes, we learn something new all the time, camshafts, vvts, inlet manifolds, combustion chamber shape, compression ratio etc can really change the way an engine utilizes fuel combustion....

[@crasher88]

everything effects everything else. there are so many factors and it always boils down to give and take. gain in one area equals a loss in another

[@EFIU_Ben]

Ageed! The variables keep it interestingfor sure!

[@notsponsored103]

This was a super helpful lesson. Thank you Ben. I feel like I should have been paying for it.

[@EFIU_Ben]

Glad it was helpful!

[@autonomous_collective]

No link for Download! Ben, add link for download talked about.

[@fredastaire6156]

OMG...?!?!? Dude, who are you and where did you come from?! This content is incredible; actual science, no bro tuning trash, or misinformation to sift through. Seriously, I'm sold...where is the course on tuning my 4 cylinder Subaru? I want to learn how to do this myself! 😍

[@EFIU_Ben]

Wow, thanks! Best feedback I've had so far!

[@jeromeallisonii8253]

WOW!?!? I thought air-fuel ratio was gonna be a lot different to understand but now you made it a lot easier to get thanks you❤

[@EFIU_Ben]

@@jeromeallisonii8253 That's great! Thanks!

[@joshuagibson2520]

The ole banana in the tailpipe. Lol. If you know, ya know.

[@Alex_Bket]

Thanks !!! We need more video

[@EFIU_Ben]

More to come!

[@FilterYT]

That was amazing. Thank you! small mistake including the "per minute" in BTU

[@EFIU_Ben]

Good call! Thanks for finding that! -Ben

[@shadowsinner1356]

Good info to know

[@EFIU_Ben]

Glad it was helpful!

[@sardengineering]

Pure Gold!

[@angelamartim8337]

I've got a question please. If a richer mixture is used to keep the temps down, then why more fuel is used right after cold starts? Shouldn't it be the other way around for cold starts?

[@EFIU_Ben]

Great question! So, only the vaporized fuel will burn, and it takes warmer temps to convert from liquid to vapor, so when the engine is cold, it requires more total fuel volume to be supplied so that enough of it will convert to vapor in order to get the engine up and running and keep it running so that it can generate some heat to warm up…as the engine temps come up, the extra fuel isn’t required so no need to waste it by continuing to add extra!

[@HPFarm]

Ben got a question, @ 15:39 ish you say using more fuel to make same power at WOT, but then state BSFC went down. Shouldn't it go up? 150 #/hr / 300 HP = 0.5 vs 200 #/hr / 300 HP = .6

[@EFIU_Ben]

Sorry…what I meant was the level of efficiency for BSFC “has gone down” meaning it’s not as good…. I see how my choice of words could have been misleading there making it seem like I meant “got smaller” which wasn’t my intended meaning. Thanks for the catch!

[@Grâce-n1d4x]

Would be nice if Metric equivalents is included to cater for the rest of the world.

[@powerst33r]

Assuming that we are going for reliability first: Given that the AFR for maximum power is probably 12.5~13.5:1, richer mixtures are more for cooling and reliability. Could we use water injection for forced induction engines instead of richer mixture to achieve the same cooling effects? Is it possible to work out how much water we need to inject? Would something like EGT be a good gauge to tell whether our thermal management is in the safe window? Another thing to consider is, would it be beneficial to run the coolant at a lower temp like 80°C instead of 90°C to help in thermal management? How do we arrive at what temp to run? My 4 stroke car engines are usually around 95°C, but my 125cc 2T race kart engines runs coolant at 55°C How about using colder spark plugs? How do we quantify how much is safe or still unsafe?

[@Offiallilwatta]

Keep these type of videos consistent, so people could have somewhere to come and learn something new and have a steady location to look forward to 💯

[@EFIU_Ben]

We definitely plan to! THANKS!

[@Mintonperformance]

Naca reports, back when we could 'trust the science' 😊 , hope all is well -Mitch

[@sardengineering]

This is fantastic information, great insight into what attendees can expect from the online courses from the EFI University. The course this video was taken from has been around for almost 10 years, and it’s still extremely relevant. Thank you Mr Strader 🫡

[@sardengineering]

Cheers Mitch, been ages since I last said hello. Hope you are well mate.

[@EFIU_Ben]

Hahah Thanks Mitch! Hope you're good too!

[@JakeSmith-m2m]

I know this isn’t related to the topic you made the video of but what is the main thing you would do if you owned a 04 f350 6.0

[@Bacongrease00]

Become a good diesel mechanic with a piggy bank

[@ComputerCapone]

Ben, your a great mind. You need to take a position in the market like Gale Banks. Open a shop open for contracts. You have the equipment and mind. Rest is history?

[@EFIU_Ben]

I wouldn't mind that one bit! Thanks!

[@ComputerCapone]

@EFIU_Ben lots of tax breaks...just saying.

[@nesmio7378]

It's 2024 - you ought to produce videos in 4K but the bare absolute minimum is 1080p - or the compromise - 1440p. 720p is 20 years outdated by now and feels weird to watch ;) Great video apart from that, hope to see more in the style and fashion of this one!

[@bitzer8722]

I refreshed because I thought there was a bug. Turns out it literally is just 720p. That was pretty disappointing. Even most phones are higher pixel count that 720p, kinda unacceptable. 1080p is bare minimum.

[@EFIU_Ben]

Well said! I made that video in 2015! LoL So, yeah I agree...better stuff coming your way!

[@nesmio7378]

@@EFIU_Ben Understandable, lol. But 720p was already outdated in 2015 - you been slacking for a while Ben ;) Better make up with crisp 4K for the videos coming up!

[@EFIU_Ben]

@@nesmio7378 New video dropped today! Take a look and see if I've delivered the goods now? LoL Thanks for the education! -Ben

[@joshuagibson2520]

Get a damn grip on yourselves. This gentleman is providing you with excellent scientific info. FOR FREE. Anything above 480 is just fine. Especially in a video with no scenery and minimal graphics. Have some grace.

[@angelamartim8337]

4:27 5:24 6:29 7:11 8:36 10:31 14:04

[@butunercouk]

2:08 Naca report 189?

[@EFIU_Ben]

You can google that and download it from several sources!

[@kenjohnson3412]

A interesting and helpful video that would be much better without the annoying and unnecessary background music.

[@notsponsored103]

I was so focused on Ben I didn't even hear it

[@nepicness]

Music might’ve been a pinch loud, but overall I didn’t notice it

[@Nudnik1]

Ok

[@Offiallilwatta]

Try and make videos when your physically working on tunes or the engine in general, this is gonna make people more interested in cars and what’s under the hood and how it works

[@EFIU_Ben]

That's a great suggestion! Thanks