Mechanics, a question about how a carburetor works...

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  • dyna mo
    just a fucking jerk
    • Dec 2008
    • 68184

    #1

    Mechanics, a question about how a carburetor works...

    i've googled this and must not be asking the question right but on a 4 barrel carb, is each barrel dedicated to 2 cylinders (of an 8 cylinder engine)?
  • crockett
    in a van by the river
    • May 2003
    • 76818

    #2
    No. They will run off 2 barrels until the gas pedal is pushed enough to open the remaining 2. All the fuel gets dumped into the intake in pretty much the same place so there is no way to tell the fuel which cylinder to go to. The intake is designed to try to get even amounts of fuel to each cylinder.

    That's what direct fuel injection does..puts it directly into the cylinders.
    In November, you can vote for America's next president or its first dictator.

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    • dyna mo
      just a fucking jerk
      • Dec 2008
      • 68184

      #3
      Originally posted by crockett
      No. They will run off 2 barrels until the gas pedal is pushed enough to open the remaining 2. All the fuel gets dumped into the intake in pretty much the same place so there is no way to tell the fuel which cylinder to go to. The intake is designed to try to get even amounts of fuel to each cylinder.

      That's what direct fuel injection does..puts it directly into the cylinders.
      nice then, thx crockie!

      Comment

      • baddog
        So Fucking Banned
        • Apr 2001
        • 107089

        #4
        I used to wire my 4 barrel so the 2nd two couldn't open to get better mileage

        Comment

        • Choopa Phil
          Confirmed User
          • Apr 2009
          • 3965

          #5
          Originally posted by baddog
          I used to wire my 4 barrel so the 2nd two couldn't open to get better mileage
          Sounds like a sure way to run lean and burn through the top of a piston.
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          • baddog
            So Fucking Banned
            • Apr 2001
            • 107089

            #6
            Originally posted by Choopa Phil
            Sounds like a sure way to run lean and burn through the top of a piston.
            Ha, yeah right.

            Comment

            • dyna mo
              just a fucking jerk
              • Dec 2008
              • 68184

              #7
              Originally posted by baddog
              I used to wire my 4 barrel so the 2nd two couldn't open to get better mileage
              it's crazy watching the amount of gasoline pouring through a big honking holley 4 barrel with the butterflies open!

              Comment

              • georgeyw
                58008 53773
                • Jul 2005
                • 9865

                #8
                Originally posted by crockett
                No. They will run off 2 barrels until the gas pedal is pushed enough to open the remaining 2. All the fuel gets dumped into the intake in pretty much the same place so there is no way to tell the fuel which cylinder to go to. The intake is designed to try to get even amounts of fuel to each cylinder.

                That's what direct fuel injection does..puts it directly into the cylinders.
                also vac secondaries that open up as the car sucks more air

                Originally posted by baddog
                I used to wire my 4 barrel so the 2nd two couldn't open to get better mileage
                That doesn't sound like the greatest idea.
                TripleXPrint on Megan Fox
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                • MiamiBoyz
                  fgfdftre6
                  • Oct 2012
                  • 6690

                  #9
                  I have no idea but while we are discussing how things work I have always wondered about how an air conditioner works.

                  Comment

                  • RebelR
                    Confirmed User
                    • Feb 2005
                    • 1998

                    #10
                    Originally posted by MiamiBoyz
                    I have no idea but while we are discussing how things work I have always wondered about how an air conditioner works.
                    Ever feel a bbq tank as you are grilling and wonder why it's freezing in the middle of summer? The liquid propane absorbs heat as it vaporizes. AC works the same way. A compressor condenses a refrigerant gas into a liquid, as it turns back into a gas it absorbs heat and cools the air passing through it
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                    Comment

                    • dyna mo
                      just a fucking jerk
                      • Dec 2008
                      • 68184

                      #11
                      Originally posted by RebelR
                      Ever feel a bbq tank as you are grilling and wonder why it's freezing in the middle of summer? The liquid propane absorbs heat as it vaporizes. AC works the same way. A compressor condenses a refrigerant gas into a liquid, as it turns back into a gas it absorbs heat and cools the air passing through it
                      Nice example. Was learning about propane refrigerators recently, was curious how they work since they cool by burning propane. The system is clever, the propane flame heats up liquid ammonia in a closed tube system, the ammonia turns to gas and rises up through the tubes, absorbing the heat out of the refer.

                      Comment

                      • baddog
                        So Fucking Banned
                        • Apr 2001
                        • 107089

                        #12
                        Originally posted by dyna mo
                        it's crazy watching the amount of gasoline pouring through a big honking holley 4 barrel with the butterflies open!
                        Especially with a 348 V8, hence disabling the secondary

                        Comment

                        • baddog
                          So Fucking Banned
                          • Apr 2001
                          • 107089

                          #13
                          Originally posted by georgeyw


                          That doesn't sound like the greatest idea.
                          Based on what?

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