What's The Best Fuel Injection? Carburetors vs Port vs Direct


Carburetors vs Electronic Fuel Injection - What's Best For Your Engine?
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What are the differences between carburetors, port injection, and direct injection? What are the advantages and disadvantages of each? Why do some cars use both port & direct fuel injection? This video deep dives into the various popular forms of fuel injection. We'll discuss the tuning flexibility of port injection, the advantages of the cooling effects of in-cylinder direct injection, as well as how dual injectors (both port & direct) can offer the benefits of both worlds, and help keep carbon deposits off of intake valves.

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  • Sassy Sasquatch
    Sassy Sasquatch2 timer siden

    Does mechanical carbi still need a fuel pump?

  • junoguten
    junoguten2 dager siden

    Main advantage of direct injection: You can run really high compression/pressure/boost without pre-ignition.

  • Cooking Is Destruction
    Cooking Is Destruction17 dager siden

    Sounds like dual injection is a WIN/WIN.

  • Leonardo Kalatiuk
    Leonardo Kalatiuk21 dag siden

    que buen canal!!!!!!!!!!

  • Baldspot
    Baldspot27 dager siden

    This guy is a amazing. I learned a lot.

  • MjekuMati after work
    MjekuMati after work27 dager siden

    I’m not convinced Jason is actually an engineer. Either that or he skipped school on the day when they taught you how to be properly flat in personality. 😜

  • Chris Mathew Joseph
    Chris Mathew Joseph29 dager siden

    Cam u pls do a video on multi point fuel injection???

  • southerner66
    southerner66Måned siden

    I remember carbureted engines from the 60s and 70s -- and the worry you had on very cold mornings: Will my car start today? Fuel injection solved a lot of that.

  • geoffrey mark
    geoffrey markMåned siden

    Good one

  • Mark Dubois
    Mark DuboisMåned siden

    Carb anyday.....no computer

  • Mingus OG
    Mingus OGMåned siden

    "Carburators haven't been used in any production vehicles in decades" *Laughs in motorcylces*

  • jesse bear
    jesse bearMåned siden

    I have a challenge to you ENGINEERING EXPLAINED: Explain waterless coolant i.e used by wheeler dealers in episode X on older car. Why this product isn't widely used and differences to watermix coolant.

  • Artur Bagiński
    Artur BagińskiMåned siden

    little explosions ? stop ! - knock sensor said...

  • Abhinav Kumar
    Abhinav KumarMåned siden

    What is Honda iDtec CRDI or DI??

  • The 1 Man Show
    The 1 Man ShowMåned siden

    I now want my '83 Chevy Monte Carlo 2B fuel injected😏... Thanks!! 👍

  • Abhinav Kumar
    Abhinav KumarMåned siden

    Sir Why do GDI develop carbon whereas oil burners do not??

  • Иван Нунядамбйс
    Иван НунядамбйсMåned siden

    I kind of missed the reason for carbon buildup in gdi engines here. Why not mention crankcase ventilation?

  • Nick
    NickMåned siden

    I like carbs because I can tune them to do whatever I want them to do, but that also entails the problems that can be associated with carb tuning. I much prefer efi because the computer does all the tuning for you, ie its easier and less of a pain in the ass.

  • Richard Van Deren
    Richard Van DerenMåned siden

    Why not design a engine that was fuel and air injection with computer control to give the best with both designs I believe this would work both injections fuel deriction and port injection

  • Jay Dunn Official music
    Jay Dunn Official musicMåned siden

    Good video. Every educational

  • David Collis
    David CollisMåned siden

    F.Y.I. The carburetor does not inject fuel. It meters fuel according to the engine demand by utilizing different circuits in the carburetor itself. You should have done a video on Throttle Body injection vs. port injection vs. direct injection. I do enjoy your videos but I was a mechanic in the late era of carburetors and have rebuilt hundreds of them from the 60's, 70's and 80's including feedback Quadrajets. Take care.

  • Commenter Five
    Commenter Five2 måneder siden

    : 49, Smokey Yunic wrote it's not an explosion, more like a reaction. Slower than an explosion. Ok, I see the test gasket, checking to see if we're awake during class. At 9: 45 the intake port has a '67 Nash Rambler windshild washer tank lid gasket.

  • Gordon Freeman
    Gordon Freeman2 måneder siden

    How neat!

  • PelaajaW
    PelaajaW2 måneder siden

    Ofcourse injection is better thats why we are using them Boom no need for 10min video

  • Lionel Cyril
    Lionel Cyril2 måneder siden

    Really insightful

  • H2V PRO Eternal
    H2V PRO Eternal2 måneder siden

    Clear explanation thanks! 😎👌

  • JuInBlu
    JuInBlu2 måneder siden

    You forgot the fact carbeuraters go bad if they sit for a suprisingly small amount of time

  • Charlie Odom
    Charlie Odom2 måneder siden

    Personally, I prefer a direct + port injection. I also prefer carb motors to EFI in certain applications due to the simplicity. My 57 Chevy has a carb motor, and when I put the 434 small block in it, I will likely go carb, unless I can figure out a way to hide components on a FAST fuel injection system.

  • Dick Dicker
    Dick Dicker2 måneder siden


  • Tootsie
    Tootsie2 måneder siden

    Here is a problem with a carburetor I wish someone could explain. It's actually two carburetors, one has never been factory rebuilt and one has. This is on a 1953 Chevy 6cyl. with a single barrel carb. With either carb installed on the engine, I can remove the upper part of the carb and the gas in the fuel bowl will creep up the sides of the fuel bowl even when cold , so it's not heat related. I first noticed this because of gas seeping around the upper gasket so I made a thicker gasket and solved that problem. Now that creeping of the fuel causes the engine to flood slightly if you shut it off for 10 or 15 minutes and try to restart it, and the carb will go completely empty after it sits for a few days. I have asked many older mechanics, like myself, about this and they don't know why either. I think maybe it's the ethanol in the fuel. Anybody??

  • Fezzler61
    Fezzler612 måneder siden

    Wish there were affordable options to switch 1970s/1980s motorcycle carbs with EFI.

    MEGACHAD2 måneder siden

    love your vids!

  • C Roman
    C Roman2 måneder siden

    Awesome awesome awesome video

  • Lewis Beshers
    Lewis Beshers2 måneder siden

    Thank you for that clear and concise explanation.

  • Gurminder Simgh
    Gurminder Simgh2 måneder siden


  • roberto romo
    roberto romo2 måneder siden

    Am i the only person who is glad gm finally ditched the spider injection lol

  • gil ron
    gil ron2 måneder siden

    auto translation to english in CC button (bottom right corner) is not working :( I think you should set the language to english instead of portugese :)

  • RedfishCarolina
    RedfishCarolina2 måneder siden

    Every engineer designs direct injection as the sole fuel delivery system should be required to spend half of their workday replacing the cylinder heads and cleaning the valves that their faulty engineering causes. Or be required to figure out how to do PCV and EGR without sending crap across the intake valve. Jackasses.

  • AgreeD Paco
    AgreeD Paco2 måneder siden


  • Shaquille RC
    Shaquille RC2 måneder siden

    FI : 1 of new AFR upgrade (exhaust/intake) : needs fuel controller or even aftermarket ECU / EMU / ECM Carb : just re-jet it

  • Pietro Luisetto
    Pietro Luisetto2 måneder siden

    Playing devil's advocate, but when fuel is injected it doesn't actually turn into a vapor. It atomizes, in other words, it is broken down into extremely fine droplets of liquid. Not a state of matter change. But other than that, amazing video!!

  • serven counter
    serven counter2 måneder siden

    Austin Steinbach now does Engineering videos ?

  • 雷欧在法国
    雷欧在法国2 måneder siden

    Wow, this is an amazing video. Thanks so much for the clear explanation!

  • aterack833
    aterack8332 måneder siden

    Well my new design plan is to do stratified but with some testing to see how rich it can get before failure to fully vaporize occurs, then use multi point injection on the direct injector and a hcci style assembly with valve throttle and no butterfly, along with single tubes per cylinder up to the filter housing chamber and same for the exhaust, I’ll also use whatever system gets the most valve variation and have a diesel injector in the exhaust, occasionally I will have it run air only in a cylinder, and then adjust the timing to allow the exhaust to return, the diesel injector will then spray the exhaust valve to clean it and cool it, and the intake will stay open to get back to the intake stroke for that cylinder again and it will run without the intake injection, the lean burn will utilize the diesel and then it will switch back to normal and another cylinder will go to this cleaning cycle, this method may be tweaked if use were to show any easy to correct flaws, but the plan will likely change before a test model is produced anyways

  • Carlitos Brigante
    Carlitos Brigante2 måneder siden

    Engineering Explained great comparation , clear and detailed video ,but at 10:26 right behind you that s a NEC violation .

  • Agent Smith
    Agent Smith2 måneder siden

    Is it bad that my old V8 truck with double carburetors have a whirlpool in the fuel tank at idle?

  • Shivendaar Shive
    Shivendaar Shive2 måneder siden

    Sir can you please put a video about different angles in crank shaft and their pros and cons

  • Clay
    Clay2 måneder siden

    You are a master teacher! Thank you !

  • James Mancuso
    James Mancuso2 måneder siden

    If egr is removed there will be little to no carbon on the intake valves. With all our modern technology we should have an alternative to egr!

  • chris carson
    chris carson2 måneder siden

    I'll take your word :D

  • DexMaster881
    DexMaster8812 måneder siden

    "Without intake injection Intake valve gets clogged up..." "So a lot of manufacturers use brand new technology of combining dual injectors to prevent this." Rudolf Diesel : "Hmmm...? Nah you just need Dirty fuel trust me"

  • Jeffrey Chavey
    Jeffrey Chavey2 måneder siden

    So does Sport mode manipulate the fuel-air mixture? 🤔 but if it’s direct injection it probably advances the timing instead

  • Free Soul
    Free Soul3 måneder siden

    The more technology you want, the more expenses you get. Simple is better.

  • Thomas Groover
    Thomas Groover3 måneder siden

    All bout that cooooling effect

  • marco brenni
    marco brenni3 måneder siden

    A perfect and clear explanations about how fuel gets into the cylinders: my compliments

  • yl e
    yl e3 måneder siden

    the dude has great content but the way he chewing the words make it a bit hard to understand for me.

  • lakespeed
    lakespeed3 måneder siden

    Can't tell if this dude is 25 or 45.

  • vtgrocky vtgrocky
    vtgrocky vtgrocky3 måneder siden

    Carburator is awsome...I'm using carburator for my bicycles

  • smart Branzuela
    smart Branzuela3 måneder siden


  • Nicholas Vonrhine
    Nicholas Vonrhine3 måneder siden

    Port rules.

  • RevA ngel
    RevA ngel3 måneder siden

    Very nice content! Thank you! But can you please use international / metric values? Bar instead of PSI would be the example in this video. That would be great, thank you!

  • Shark Nado
    Shark Nado3 måneder siden

    Ahmm ....... I´m not even form the hood , and I´m late. Anyway, lots of low cc. bikes around the world still run on carbs. And do very well. So well sometimes you wouldn´t tell.... I have a 150 cc. bike I want to improve a little. I´m a low budget anachronic amateur developer also, however, I do know Bernoulli is not a soft drink (though it could be actually, leaned, not enriched...). A new, flat slide, 28 mm. costs me usd 20. .........................no.....................no................I don´t care ..............(place a deaf monkey here)

  • Alan Martinez
    Alan Martinez3 måneder siden

    my 71 V8 with a carb starts on the first twist...

  • Nick Karsten
    Nick Karsten3 måneder siden

    Most important thing about running rich is the backfire your exhaust makes

  • Ravi Subramaniyan
    Ravi Subramaniyan3 måneder siden

    How is this GDI different from diesel injection? Please make a video on that.

  • Darren Munsell
    Darren Munsell3 måneder siden

    Stratified Injection - huh .. hmmm

  • 顏瑋廷
    顏瑋廷3 måneder siden

    I got a lot of questions with injector How they work in high rpm and if i use port inject plus shower inject dose make it better With high rpm? Low rpm with port and high rpm with shower My AFR stable in 12.8 And what dose the shower inject give me? Good or bad. Just for raise up performance.

  • So Core
    So Core3 måneder siden

    Drug addicts prefer direct injection.

  • clockworkbike
    clockworkbike4 måneder siden

    How neat, indeed!

  • nathan kopfmann
    nathan kopfmann4 måneder siden

    Have you checked out metering rod carbs? Like the ones from lectron or smart carb. They use really ingenious stuff. They have a specially designed rod that sticks out into the intake, and it creates an eddy current that draws fuel up the rod in different volumes and heights depending on how much air it draws past

  • Mountain Drew
    Mountain Drew4 måneder siden

    HOW NEAT!!! great explanation thank you!

  • pradeep deepu
    pradeep deepu4 måneder siden

    Very precise, good video

  • jhsevs
    jhsevs4 måneder siden

    How do different diesel injection systems work? Is there a difference between pre chamber injection and swirl chamber injection?

  • jhsevs
    jhsevs4 måneder siden

    Why do carbed engines smell so distinctive from the exhaust? Is it because they run richer, lower efficiency, because of worse atomization of the fuel mist, because of larger fuel droplets, or what?

  • Mark TheFINDER
    Mark TheFINDER4 måneder siden

    Carburetor use by LEGENDS F. Injection use by KIDS

  • [special needs] Mo Lester
    [special needs] Mo Lester4 måneder siden

    Carb better

  • you are soul
    you are soul4 måneder siden

    5:20 Hope they don't let beardy guy near a running engine!

  • Darren Munsell
    Darren Munsell4 måneder siden

    Carbs are better, injectors are OK and direct injection is an egregious abuse of customers - esp for diesels (direct injection for diesels 5,000-15,000 psi and cost $600 USD EACH) ... what were they thinking -

  • Mr. Mr.
    Mr. Mr.4 måneder siden

    And yet the fuel mileage gain is minimal on direct injection

  • Ken Smith
    Ken Smith4 måneder siden

    Another point is the amount of power of the three. A carb can still provide upto 30% more power on the top end, than the computer driven devices.

  • Redtooth 75

    Redtooth 75

    4 måneder siden

    Not really. A properly tuned EFI system should make the same or more power than a carbed setup. A carburetor cannot provide the optimal afr at all conditions, efi can. Im curious as to how a carb can give an engine 30% more power.

  • DFB58
    DFB584 måneder siden

    Hey guys, he did it as an example since its not going onto anything, but NEVER flip your carburetor upside down or you'll screw up the floats

  • cecelia arteaga
    cecelia arteaga4 måneder siden

    You are the best!! Amazing at explaining and presenting. Makes it really easy to grasp and understand. ☺️

  • Dinh Dover
    Dinh Dover4 måneder siden

    Thanks, another great video!

  • Tejas Padhye
    Tejas Padhye4 måneder siden

    One thing I dont get. When i use choke on my bike, rpm rises to 4k bu isnt that detrimental to the engine? Having it run at high rpm right from a cold start?

  • Rod Fleming
    Rod Fleming4 måneder siden

    Carburetors are always better. But then, vehicles made before 1990 are better too.

  • Aditya Mahat
    Aditya Mahat4 måneder siden

    Subbed! :)

  • Frankfurt 13
    Frankfurt 134 måneder siden

    Carburettors do sound better...

  • Javier Riccardi
    Javier Riccardi4 måneder siden

    He didn’t mention that carburetors can be adjusted for A/F ratios by “re-jetting” the carburetor. It’s not as easily adjusted as on a EFI system and not as variable through the throttle position range, but it is adjustable for A/F ratio.

  • Javier Riccardi

    Javier Riccardi

    4 måneder siden

    Redtooth 75 Totally agree with you. Carburetors are a PITA compared to EFI. They do sound better though. I’d say it’s about the only advantage besides being cheap and simple.

  • Redtooth 75

    Redtooth 75

    4 måneder siden

    its as easy as can be to change the settings on an EFI system. You just tell the computer to inject more fuel, you don't have to physically change any components. EFI systems can be as variable as you want it to be, it all depends on how many sensors you have and how complex the tuning parameters are.

  • Pawel W
    Pawel W4 måneder siden

    Very interesting. Now - what are engine maps for if we already have a Lambda sensor which is reacting to differences to fuel:air ratio ?

  • Tae Young Ahn
    Tae Young Ahn4 måneder siden

    Ahhh, the choke. Reminds me of many cold winter mornings.

  • Paweł
    Paweł4 måneder siden


  • Stacy Langford
    Stacy Langford4 måneder siden

    If you like fuel in your oil, direct injection is awesome! That's how racing engines make more power, in a few hundred miles. Then, junk it you silly consumers

  • stolenlaptop
    stolenlaptop4 måneder siden

    They switched to fuel injectors to stop fuel from evaporating into the air from the float bowl.

  • Lindsay W
    Lindsay W4 måneder siden

    How easy/difficult/costly is it to replace the valves in a direct injection system?

  • Alex2900
    Alex29004 måneder siden

    So which one would common rail fall under? The rail pressure could be over 1000 bars

  • JonahKai 671
    JonahKai 6714 måneder siden

    What's the difference between side draft and down draft carbs

  • Beach Boy
    Beach Boy4 måneder siden

    Q.why didn't the British and the Americans copy the fuel injection of the German bf109?

  • Anthony Coffey
    Anthony Coffey4 måneder siden

    All I know is there is nothing on earth that sounds better than stomping a V8 & letting that 4-barrel carb open up & roar! 🥰

  • Buff Barnaby
    Buff Barnaby4 måneder siden

    well , FI uses port not D.I.

  • Mohammad Alawneh
    Mohammad Alawneh4 måneder siden

    Is the fuel get out from the nozzle because of carburetor depression or the pressure come for pipe to push the fuel ?? I need explain