Thermoquad or Holley?

Fuel and Air Systems

  1. abodyjoe

    abodyjoe Well-Known Member

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    before messing with carbs and all i think you need to do a little more research and find out exactly what you have all the way around..
     
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    • Mopar-Mitch

      Mopar-Mitch Well-Known Member

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      Yep, I wish I could find the guy who actually built the car, I'd sure have a lot of questions for him.
       
    • rumblefish360

      rumblefish360 So close, yet so far away

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      If it is a car carb, yea, possibly no good.
      If it is a truck carb, it’s OK. No real big emissions to contend with.
      It is possible to use a AFB AVS step up spring. It ain’t pretty. You can also delete the spring all together and let the TQ’s residential base plate cam lift the tree for enrichment. Not a great thing, but it works. The TQ is do-able but IMO it only goes so far. Which can be pretty good.
       
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      • dartfreak75

        dartfreak75 Restore it, Dont part it! FABO Gold Member

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        Ok I didnt know that. Thanks! I'm just starting to learn about them. I'm wanting to run a tq on my 360 for a nostalgic and classic look and feel.
         
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        • dartfreak75

          dartfreak75 Restore it, Dont part it! FABO Gold Member

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          I didnt know that either.
          So from the factory where was the distributor advance plugged?
           
        • Mopar-Mitch

          Mopar-Mitch Well-Known Member

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          This one has a vacuum advance port. PCV port is in the front.

          IMG_20190526_214235.jpg

          IMG_20190526_214219.jpg
           
        • j par

          j par Well-hung Member

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          Without the rear gears we really don't have a full grip on what's going on here let alone the cam. Maybe the chock the wheels and turn the Driveline test? Easy to figure out the gears...

          also my vote is for dual quads and run the thermoquad and the Holly and really blow everybody's mind LOL:poke:
          I'd like to listen in on the call that goes to the holley or the Edelbrock tech line when you tell him about this combination LOL:D
           
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          • Mopar-Mitch

            Mopar-Mitch Well-Known Member

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            I can't believe the prices of the 4150's now days, I may need to start saving and spring for a new one.
             
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            • rumblefish360

              rumblefish360 So close, yet so far away

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              The rear port is a simple full time vacuum port.
              Not for a distributor.

              The distributor port should be a small one on the drivers side of so equipped. It can be added in.
               
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              • Mopar-Mitch

                Mopar-Mitch Well-Known Member

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                My distributor doesn't have a vacuum advance, its a old DC tack drive unit.
                 
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                • j par

                  j par Well-hung Member

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                  It could be freeway gears and along duration cam bad combination. I think maybe Jack the car up in the back and Counting the rotations of the tire versus the Driveline.
                   
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                  • Mopar-Mitch

                    Mopar-Mitch Well-Known Member

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                    Yep, I've been aiming to do that, I've even thought about pulling the cover just to see also. I wish it had 3:55's but i believe its in the neighborhood of 2:76.
                     
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                    • RustyRatRod

                      RustyRatRod 30 Degrees Outta Whack FABO Gold Member

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                      I've tried the sprAng delete. It didn't work well for me at the time.
                       
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                      • RustyRatRod

                        RustyRatRod 30 Degrees Outta Whack FABO Gold Member

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                        Well there's one problem.
                         
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                        • Mopar-Mitch

                          Mopar-Mitch Well-Known Member

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                          I'd really like to have a new RPM airgap and a new 4150 holley, I had that setup on a 73 dart sport 360 I had a couple years ago and loved it. I guess now that money's short I'm just looking for cheaper ways.:)
                           
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                          • RustyRatRod

                            RustyRatRod 30 Degrees Outta Whack FABO Gold Member

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                            Well I can sure relate to "all that".
                             
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                            • j par

                              j par Well-hung Member

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                              276's and a long-duration cam.. this could be a possible problem...
                               
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                              • Mopar-Mitch

                                Mopar-Mitch Well-Known Member

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                                Yep, I sure need a better distributor, I'm working with some ancient stuff on this one.
                                 
                              • brian6pac

                                brian6pac Well-Known Member

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                                That's not a problem! It will give you more MPG if that is what you want but if it's all go than it is the best you can get.
                                 
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                                • RustyRatRod

                                  RustyRatRod 30 Degrees Outta Whack FABO Gold Member

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                                  ok, if you say it's not, then it's not.
                                   
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                                  • brian6pac

                                    brian6pac Well-Known Member

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                                    I have had 8 of these dist and the cars always went faster with them when set up correctly, SB or BB I have them in many motors and they work better than any dist I have used. They have a big ball bearing in the top of the shaft above the tach drive and it is super tight no play ever, they used good bearings back then. Sometimes old technology is better and this is one good distributor.
                                     
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                                    • RustyRatRod

                                      RustyRatRod 30 Degrees Outta Whack FABO Gold Member

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                                      I understand. I know what they are. They are more of a race bred unit, which he does not need. I agree about the old tech more than anybody. You should know that. Nevertheless, "whatever" tech you're using should be matched to "what you're doin".
                                       
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                                      • brian6pac

                                        brian6pac Well-Known Member

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                                        I agree to a point. But he has it and I don't think it is a problem. He has other problems.
                                         
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                                        • RustyRatRod

                                          RustyRatRod 30 Degrees Outta Whack FABO Gold Member

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                                          I agree. I didn't say it was "the" problem. Just one. I believe he may not have enough initial timing mainly. The type of distributor doesn't matter there, but it can make a difference elsewhere. I think we're on the same page with this.
                                           
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                                          • rumblefish360

                                            rumblefish360 So close, yet so far away

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                                            Unless someone is looking for 200 mph.
                                             
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