A Quick TQ I.D.

Discussion in 'Fuel and Air Systems' started by rumblefish360, Oct 28, 2018.

  1. rumblefish360

    rumblefish360 so close yet so far away

    Messages:
    32,410
    Likes Received:
    4624
    Joined:
    Jun 21, 2005
    Location:
    New York, on a Island
    View My Photos
    Local Time:
    8:06 PM
    Member @Mtrhead and I were talking about TQ carbs the otherday. I told him I’d post up a few pictures and talk about them. There was a excellent thread by a member, 69 Cuda 440, that has since past away. The thread about these carbs lack a few pictures, though there is some VERY good info with in that thread located here; Carter Thermoquads ~ 'More General Information'

    I hope this helps.
     
    Last edited: Oct 28, 2018
    • Like Like x 2
    • rumblefish360

      rumblefish360 so close yet so far away

      Messages:
      32,410
      Likes Received:
      4624
      Joined:
      Jun 21, 2005
      Location:
      New York, on a Island
      View My Photos
      Local Time:
      8:06 PM
      What I have here are two models of the 9800 over the counter aftermarket TQ carbs. They were commonly called the 800’s for there reported cfm capacity. Which is over rated IMO. But non the less..

      The TQ’s here have the small 1.38 primary.
      The MoPar carb (8901) is on the left and the Chevy carb (9800) is on the right.
      Note where the throttle cables connect. The arms are different.

      I have used the Chevy unit with Lokar cables. Hey haven’t tried to use it with stock equipment.

      On the front of the carb is three vacuum ports. The large PVC, 1 timed @ 1 ported vacuum nipples.

      On the rear of the carbs, the Chevy on the right has a large power brake hose nipple for the booster. The MoPar has a second full time vacuum port.

      The electric choke is hooked up with 1 wire only. A 12 volt wire that is only “hot” when the key is in the on/run position.
      The electric choke is set via of twisting the cap, which is available new. As seen on the left carb.

      image.jpg image.jpg
       
    • rumblefish360

      rumblefish360 so close yet so far away

      Messages:
      32,410
      Likes Received:
      4624
      Joined:
      Jun 21, 2005
      Location:
      New York, on a Island
      View My Photos
      Local Time:
      8:06 PM
      image.jpg image.jpg image.jpg image.jpg
       
      Last edited: Oct 28, 2018
    • rumblefish360

      rumblefish360 so close yet so far away

      Messages:
      32,410
      Likes Received:
      4624
      Joined:
      Jun 21, 2005
      Location:
      New York, on a Island
      View My Photos
      Local Time:
      8:06 PM
      Below is one of the aftermarket RACE TQ’s. This was purchased by me with the seller stating it is a 4846. There is also the 4847 which is said to be the larger of the two. Rated at a true 815/915 cfm. Or so it was said.... these are interesting carbs.

      Not the first picture. There is the universal throttle cable attachment. It is clockable!
      Only 1. Vacuum port on the lower driver side.
      Now we’re you quick to catch with your Eagle eyes the splayed idle trim screws?
      The 2 position pumpshot slots?
      How about that manual choke cable holder on the drivers side, upper corner?

      image.jpg

      Here at the rear, there is one vacuum port for the power brake booster. But what the heck?!?! The fuel inlet is facing downwards. Here, you’ll need a Rochester QJ fuel fitting.

      Also notice the lack of anything else on the passengerside!
      image.jpg

      On this overhead shot, you can see how the choke lever operates the rod connected to the choke plate.

      The lack of rods crossing over the secondary side.
      And I’ll get a better shot up of the single ring primary boosters.
      image.jpg

      Here the primaries are 1.50. Very noticeable over the 1.38.
      image.jpg
       
    • rumblefish360

      rumblefish360 so close yet so far away

      Messages:
      32,410
      Likes Received:
      4624
      Joined:
      Jun 21, 2005
      Location:
      New York, on a Island
      View My Photos
      Local Time:
      8:06 PM
      As I said above, single booster primaries. Lower restriction. More cfm. And as mentioned in various publications, the possibility of a crappier idle.
      image.jpg

      Here is the secondary side with more air/less obstruction to breath a little deeper. It’s the lack of OE choke parts.
      image.jpg

      All TQ’s have 2-1/4 inch secondaries. You can see more flow through this than the OE carb.
      Breath deep baby!
      image.jpg

      The primary side.
      image.jpg

      A side by side of a OE TQ and the race TQ.
      Notice the lack of linkage. The secondary side will always open up where the OE will not always open up if then choke is slightly closed. You can use bailing wire as instructed by MoPar in there books to make it work all the time.
      The secondaries are mechanical in nature but the spring loaded secondary air door above will have the carb acting like a vacuum secondary carb and opening when you want it to with a twist of a screw driver.
      image.jpg
       
      Last edited: Oct 28, 2018
      • Like Like x 2
      • rumblefish360

        rumblefish360 so close yet so far away

        Messages:
        32,410
        Likes Received:
        4624
        Joined:
        Jun 21, 2005
        Location:
        New York, on a Island
        View My Photos
        Local Time:
        8:06 PM
        Slightly different TQ’s

        This is a 9027 which I found to be decoded as a Carb for an International Harvester 392 hemi. This was from the vannth guide. I hope he’s accurate!

        Note on the overhead shot there is a tab between the secondary butterflies. This is to help lean out the carb under certain conditions. This can be plugged for performance use.
        096784E5-62D8-4939-8393-EE3E6D5052C2.jpeg

        The front of this carb only has a PVC and spark adavce port.
        898813EA-F661-4FAD-B33A-08D53E6E1263.jpeg

        The back only has 1 vacuum port.
        F6370E4C-3A65-4D54-8067-D53E3AE2D212.jpeg
         
      • rumblefish360

        rumblefish360 so close yet so far away

        Messages:
        32,410
        Likes Received:
        4624
        Joined:
        Jun 21, 2005
        Location:
        New York, on a Island
        View My Photos
        Local Time:
        8:06 PM
        The kind of TQ you want to get for high performance or racing.


        This 6545 is a large primary TQ. The carb has almost nothing on it up front like the IH carb, but it doesn’t have the secondary lean out tab/circuit.

        There are several models built like this so don’t freak out when you can’t find one exactly as labeled and don’t pay extra because some meatball reads this and tries to add worth to the carb. There are plenty of TQ’s with a lack of vacuum nipples in large and small sizes.
        FD04F2A3-E96C-4EA0-B30F-5727E064A71D.jpeg 5F113FD1-3AE9-4D5C-BC47-D93480F4A9E1.jpeg
         
      • rumblefish360

        rumblefish360 so close yet so far away

        Messages:
        32,410
        Likes Received:
        4624
        Joined:
        Jun 21, 2005
        Location:
        New York, on a Island
        View My Photos
        Local Time:
        8:06 PM
        Are some emissions equipment OK?

        This is a 9023. It has some extra ports on it. The small nipple in the phenolic resin body is the EGR port. The other one in the base is connected to the vapor canister as well as the one (partially hidden) on the upper aluminum body on the passenger side.

        While labeled “emissions”, and correctly so, they can also help run the car. Make it easier to start up the car.. Cap them or hook them up, your call. They will not hurt wide open throttle performance.
        1 vacuum port in the back.
        Overall, still a good carb to use.
        1F427330-BCFA-4EE9-BF3E-52889F2DC83F.jpeg 7FBD02EE-F98D-4327-A60C-6113FC0AC0C8.jpeg
         
        Last edited: Oct 28, 2018
        • Like Like x 1
        • rumblefish360

          rumblefish360 so close yet so far away

          Messages:
          32,410
          Likes Received:
          4624
          Joined:
          Jun 21, 2005
          Location:
          New York, on a Island
          View My Photos
          Local Time:
          8:06 PM
          The newer the TQ, the more ports it can have. Pick up truck and larger were exempt from the tail pipe police for a long time so this carbs could, not always, but could also have a lack of vacuum ports.

          The newer the carb, well, for the most part, they will have more added on and into the them. Plugging the ports doesn’t always work because the the internal circuitry. If you get a newer TQ, it would be best used as intended and fully hooked up. They can still provide excellent power, mileage, throttle response and in some cases, there was a fuel trim vacuum set up that would help with driving in constantly changing various altitude conditions with the mounted on the front “compensator” attachment.
           
          • Like Like x 1
          • rumblefish360

            rumblefish360 so close yet so far away

            Messages:
            32,410
            Likes Received:
            4624
            Joined:
            Jun 21, 2005
            Location:
            New York, on a Island
            View My Photos
            Local Time:
            8:06 PM
            These you want to stay away from in high performance or better applications

            EEE680DB-1FC4-4255-8A32-1BAD6D802AC9.jpeg 2431FD89-221A-46AF-B650-DBCD38D81118.jpeg 70E2A114-CEC7-4996-872C-673D9E0E80E7.jpeg
             
            • Like Like x 1
            • rumblefish360

              rumblefish360 so close yet so far away

              Messages:
              32,410
              Likes Received:
              4624
              Joined:
              Jun 21, 2005
              Location:
              New York, on a Island
              View My Photos
              Local Time:
              8:06 PM
              Ok ok ok, it’s true, I have a few mental short comings on things... that could work... and try for fun....
              What the heck, it’s just thinking, tinkering around and ...........
              some fuel.

              3DA0893A-0361-4C4A-88DB-0B83C6079BE9.jpeg 11EC8B34-6EE5-4572-8D33-3CEAF7886151.jpeg
               
              • Like Like x 3
              • Mtrhead

                Mtrhead Well-Known Member

                Messages:
                261
                Likes Received:
                18
                Joined:
                Sep 19, 2018
                Location:
                S.C.
                Local Time:
                8:06 PM
                Wow....so many options
                 
              • Mtrhead

                Mtrhead Well-Known Member

                Messages:
                261
                Likes Received:
                18
                Joined:
                Sep 19, 2018
                Location:
                S.C.
                Local Time:
                8:06 PM
                Ty for the knowledge now I know a 9801 is the one I want...big gulp superquad
                 
              • rumblefish360

                rumblefish360 so close yet so far away

                Messages:
                32,410
                Likes Received:
                4624
                Joined:
                Jun 21, 2005
                Location:
                New York, on a Island
                View My Photos
                Local Time:
                8:06 PM
                That would be the Chevy throttle arm small primary unit that 69 Cuda 440 said was rated at 737 cfm. The electric choke is a nice added on feature from Carter.

                I have found the small primary TQ’s very at home on stock to very mildly modified engine of small displacements of 360 and smaller.

                If anyone has a hot street engine of 330 cubes are larger, the 1.50 primary TQ will drive with a little more (& noticeable) power, a bit smoother as well. The smaller primary works well but the feel between them is apparent like the small 1.38 primary carb is struggling a little bit. The draw back to the larger primary TQ is no electric choke.

                Hooking up a manual choke cable can be a tricky operation but yet possible.
                 
              • Mtrhead

                Mtrhead Well-Known Member

                Messages:
                261
                Likes Received:
                18
                Joined:
                Sep 19, 2018
                Location:
                S.C.
                Local Time:
                8:06 PM
                Probably gonna give up on competition thermo till July 2019 I'm sure Carlisle will have a beast!!!1000cfm
                 
              • 408 swinger

                408 swinger FABO Gold Member FABO Gold Member

                Messages:
                390
                Likes Received:
                216
                Joined:
                Nov 12, 2010
                Location:
                Iowa
                Local Time:
                7:06 PM
                How do you identify cfm of a competition series if there's no tag? What is the difference between the 4846 and 4847. I have one, not sure which.
                 
              • Mtrhead

                Mtrhead Well-Known Member

                Messages:
                261
                Likes Received:
                18
                Joined:
                Sep 19, 2018
                Location:
                S.C.
                Local Time:
                8:06 PM
                One is 850 other is 1000 lemme check ## wanna sell
                 
              • Mtrhead

                Mtrhead Well-Known Member

                Messages:
                261
                Likes Received:
                18
                Joined:
                Sep 19, 2018
                Location:
                S.C.
                Local Time:
                8:06 PM
                4847 is the larger font know if that is the 1000cfm one....might be
                 
              • 408 swinger

                408 swinger FABO Gold Member FABO Gold Member

                Messages:
                390
                Likes Received:
                216
                Joined:
                Nov 12, 2010
                Location:
                Iowa
                Local Time:
                7:06 PM
                Larger font? The competition series decals are missing. There isn't numbers on the left rear base like a "production" version.
                 
              • Mtrhead

                Mtrhead Well-Known Member

                Messages:
                261
                Likes Received:
                18
                Joined:
                Sep 19, 2018
                Location:
                S.C.
                Local Time:
                8:06 PM
              • 408 swinger

                408 swinger FABO Gold Member FABO Gold Member

                Messages:
                390
                Likes Received:
                216
                Joined:
                Nov 12, 2010
                Location:
                Iowa
                Local Time:
                7:06 PM
                20181028_211024.jpg 20181028_211031.jpg 20181028_211045.jpg Not trying to hi jack. Posting these for identification/education purposes for all. 20181028_211059.jpg
                 
              • Mtrhead

                Mtrhead Well-Known Member

                Messages:
                261
                Likes Received:
                18
                Joined:
                Sep 19, 2018
                Location:
                S.C.
                Local Time:
                8:06 PM
                That's the one I need lol....wanna sell
                 
              • 408 swinger

                408 swinger FABO Gold Member FABO Gold Member

                Messages:
                390
                Likes Received:
                216
                Joined:
                Nov 12, 2010
                Location:
                Iowa
                Local Time:
                7:06 PM
                What is it? Please educate me,lol.
                 
              • Mtrhead

                Mtrhead Well-Known Member

                Messages:
                261
                Likes Received:
                18
                Joined:
                Sep 19, 2018
                Location:
                S.C.
                Local Time:
                8:06 PM
                Don't really know cfm sorry...do know its the aftermarket comp model..1969 model has press in jets 1970 has screw in
                 
              • 408 swinger

                408 swinger FABO Gold Member FABO Gold Member

                Messages:
                390
                Likes Received:
                216
                Joined:
                Nov 12, 2010
                Location:
                Iowa
                Local Time:
                7:06 PM
                Then it us 1969 model. I have had it apart and it has the press/o-ring jets. Does one measure the primary bores to determine cfm? I have wanted one of these for years and finally found this one a year ago. If it's the 850, I may not have much use for it. If it's "big bertha", it's going on my 700 horse gen 3.