Original 4300D carburetor. |
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Anderslober
Senior Member Joined: 30-July-2019 Location: Denmark Status: Offline Points: 764 |
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Posted: 10-January-2020 at 6:58AM |
Hello forum......please be gentle....I am still learning.
I bought a nice 4300D/4sp carb for my 72 GTS/351CJ/4sp. (There was a Holley on before). Just 2 qq`s.....what are the `appendages` on either side for? I have seen many pictures og 4300D without the `appendages`. I am guessing something to do with A/C and idling.....my car does not have A/C or anything..... |
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72FordGTS
Admin Group GTS.org Admin Joined: 06-September-2005 Location: Ontario, Canada Status: Offline Points: 5848 |
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The one on the front of the carb is the throttle solenoid and the one on the rear is the choke vacuum control assembly. Both were used on the 4300D carbs regardless of A/C or not. The throttle solenoid was used also as an anti-diesel device, but allowing the throttle to close more when the car was shut off to prevent dieseling or run-on.
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Vince
1972 Ford GTS Sportsroof - Survivor, One Family car GTS.org Admin |
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Anderslober
Senior Member Joined: 30-July-2019 Location: Denmark Status: Offline Points: 764 |
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Great info...thanks. But, how come I see a lot of carbs without the `appendages`? Are the appendages necessary for normal operation?
I need the center pin/screw where the air cleaner wing nut mounts......where to buy? Or does anyone have one or similar? Thanks.
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Rockatansky
Senior Member Joined: 30-July-2010 Location: On The Road Status: Offline Points: 6072 |
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because so many 'experts' removed them and threw them into the bin thinking they were going to improve performance but got only headaches instead
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72 GT Ute
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72FordGTS
Admin Group GTS.org Admin Joined: 06-September-2005 Location: Ontario, Canada Status: Offline Points: 5848 |
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+1 You can just get a universal air cleaner stud. The one from your Holley might work. You can always cut it shorter if need be. |
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Vince
1972 Ford GTS Sportsroof - Survivor, One Family car GTS.org Admin |
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Rockatansky
Senior Member Joined: 30-July-2010 Location: On The Road Status: Offline Points: 6072 |
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the stud may be a stepped size and part of the clamping force that holds the top to the main body? |
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72 GT Ute
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Anderslober
Senior Member Joined: 30-July-2019 Location: Denmark Status: Offline Points: 764 |
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Thanks. I managed to find a stud for my 4300D....quite different from `normal` studs....this is what it looks like...
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72FordGTS
Admin Group GTS.org Admin Joined: 06-September-2005 Location: Ontario, Canada Status: Offline Points: 5848 |
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Sorry about that, I just made a quick assumption on the carb stud. I should have checked the parts diagram first and I would have seen that it wasn't just a standard stud.
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Vince
1972 Ford GTS Sportsroof - Survivor, One Family car GTS.org Admin |
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Anderslober
Senior Member Joined: 30-July-2019 Location: Denmark Status: Offline Points: 764 |
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Regarding the throttle solenoid....is that only for cars with a/c? My Torino does not have a/c.
Thanks. |
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albo74
Senior Member Joined: 25-February-2006 Location: ME. USA Status: Offline Points: 616 |
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no, ac or not , all these car need to warm up on a little higher idle , with out it you may find you need to keep your foot on the pedal , I have the stock carb on my 73 complete with all its parts , it starts right up ,warms up with out me in the car. It might have a slight hesitation if you stomp on it , that was a problem for me in 1974 , enter the Holley 650 . but I would 't do that again
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albos73gts
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Anderslober
Senior Member Joined: 30-July-2019 Location: Denmark Status: Offline Points: 764 |
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wow!..beautiful car and engine! Would you be willing to take of your air cleaner and snap a few photos...both sides? That would be awesome.
Thanks...
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albo74
Senior Member Joined: 25-February-2006 Location: ME. USA Status: Offline Points: 616 |
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So it's a little after 11 pm your time , up late . Yes I have lots of pictures with the air cleaner on . but I can get you some close ups with it off , snow storm tomorrow . I will get in the garage in the afternoon , side note , My great grandparents immigrated from Denmark .
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albos73gts
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californiajohnny
Moderator Group Joined: 05-October-2013 Location: winlock, wa Status: Offline Points: 14609 |
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if the choke system is adjusted right it should idle up to warm up i think they were mainly for the a/c cars to keep the idle up with the a/c on at a light idling...?
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JOHN
74 GRAN TORINO S&H CLONE 74 VETTE CUSTOM 90 S10 BLAZER 4X4 LIFTED 77 CELICA CUSTOM 75 V8 MONZA SUPERCHARGED 79 COURIER VERT. SLAMMED 75 VEGA V6 5 SPD 70 CHEV C10 P/U 68 MUSTANG FB CONVERSION |
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Anderslober
Senior Member Joined: 30-July-2019 Location: Denmark Status: Offline Points: 764 |
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yes...I have asked a bit around.....and it seems the throttle solenoid is mainly for a/c cars.......no need need for it on non a/c cars(mine).
I dunno.....my carb is not the ACTUAL original, but it is a period correct carb(same year/month). I would really like to see, what the original setup looked like.....non a/c, 4sp car. The other `appendage`, `choke pull-off`....would also be really nice to know of it was there or not..... Thanks.... |
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albo74
Senior Member Joined: 25-February-2006 Location: ME. USA Status: Offline Points: 616 |
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this is a 4 speed , non ac car but it is a 73 , so they did add some emissions control stuff to it , intake manifold to the carb , that was to recycle un burn gasses . not to healthy for the carb . I left it on for the stock look but taped and plugged . sorry the pictures aren't the best .
Edited by albo74 - 16-January-2020 at 6:12AM |
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albos73gts
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albo74
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albos73gts
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Anderslober
Senior Member Joined: 30-July-2019 Location: Denmark Status: Offline Points: 764 |
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Great pictures! Thanks...
Keep em comin`....
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Steve M.
Senior Member Joined: 08-June-2019 Location: Florida Status: Offline Points: 1756 |
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Very nice.
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Steve M.
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72FordGTS
Admin Group GTS.org Admin Joined: 06-September-2005 Location: Ontario, Canada Status: Offline Points: 5848 |
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It sounds like you want to remove the solenoid? Like I said earlier, cars without A/C had them too. It was primarily an anti-dieseling device. If you have a 1972 factory service manual, the idle adjustment procedure includes setting the solenoid. There is no process for 1972 4300D carb that doesn't include that step. It also says that it is not strong enough to open the throttle (ie like an a/c high idle type solenoid). That said, I am sure you can run without it if you really want too.
The rear choke vacuum assembly is used for proper choke operation. Not sure why you'd want to remove it? |
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Vince
1972 Ford GTS Sportsroof - Survivor, One Family car GTS.org Admin |
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Anderslober
Senior Member Joined: 30-July-2019 Location: Denmark Status: Offline Points: 764 |
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Great info. I have just finished servicing the carb...very easy to work on.
I would like to keep everything as stock as possible. But, I also want/like to keep things simple. I will install with the solenoid and choke pull-off.
There is a connector on the harness (runs over the intake)that looks like it connects to the solenoid. I hope it is the right connector, so I dont ‘blow’ something up. Also.....regarding the choke pull-off.....to what vacuum source do I connect it?? (The car came with an ill-fitting Holley....so I bought the ‘original’ 4300D) |
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californiajohnny
Moderator Group Joined: 05-October-2013 Location: winlock, wa Status: Offline Points: 14609 |
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generally on most carbs with a choke pull off it's connected to direct vacuum, in theory as soon as the engine starts it opens the choke slightly so not to flood the engine
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JOHN
74 GRAN TORINO S&H CLONE 74 VETTE CUSTOM 90 S10 BLAZER 4X4 LIFTED 77 CELICA CUSTOM 75 V8 MONZA SUPERCHARGED 79 COURIER VERT. SLAMMED 75 VEGA V6 5 SPD 70 CHEV C10 P/U 68 MUSTANG FB CONVERSION |
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Anderslober
Senior Member Joined: 30-July-2019 Location: Denmark Status: Offline Points: 764 |
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ok...direct vacuum....would that be a connection on the carb...or the intake?
I dont know why the 72/351cj/4sp vacuum diagram is soooo secret and hard to come by....why?. The diagram that was posted in another thread is very hard to see...
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handsofstone
Senior Member Joined: 13-April-2018 Location: Northeast Status: Offline Points: 3946 |
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Carb base is manifold vacuum I believe.
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72FordGTS
Admin Group GTS.org Admin Joined: 06-September-2005 Location: Ontario, Canada Status: Offline Points: 5848 |
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The 351CJ diagrams aren't that hard to come by, I just posted them for you!
Look here on the non-A/C diagram, you will see that the carb connects to the vacuum tree at the back of the intake. Most of the stuff that requires vacuum manifold came off this tree. I zoomed the pic so you can see. See 9S514? That looks like where the choke pull off connects. 9A474 is the vacuum tree on the manifold. |
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Vince
1972 Ford GTS Sportsroof - Survivor, One Family car GTS.org Admin |
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Anderslober
Senior Member Joined: 30-July-2019 Location: Denmark Status: Offline Points: 764 |
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wow..awesome....that picture is much better. Thanks.
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Anderslober
Senior Member Joined: 30-July-2019 Location: Denmark Status: Offline Points: 764 |
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it seems the stud I bought is wrong. It will not fint in the stud hole...shucks...
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handsofstone
Senior Member Joined: 13-April-2018 Location: Northeast Status: Offline Points: 3946 |
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Figure out the thread and length then cut and thread it. Not metric.
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handsofstone
Senior Member Joined: 13-April-2018 Location: Northeast Status: Offline Points: 3946 |
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looks like you need a 1/4"-20 stud. I used stainless threaded rod I believe nut I have a Holley. Does the short end thread in?
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Anderslober
Senior Member Joined: 30-July-2019 Location: Denmark Status: Offline Points: 764 |
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no...short end doesnt thread in....just drops in. Anyway...I will try to find another that fits....
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handsofstone
Senior Member Joined: 13-April-2018 Location: Northeast Status: Offline Points: 3946 |
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the thread in the carb is deep down the hole. If you make a stud and use a locking nut, be sure to stake the threads on either side of the nut so it never falls off. You can stick a small diameter dowel or wire diwn the hole to see how deep it goes and where the threads start.
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