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What Carb is This?
https://slantsix.org/forum/viewtopic.php?t=39033		 Page 1 of 1
Author:  neilskiw [ Wed Feb 17, 2010 4:14 pm ]
Post subject:  What Carb is This?
Two of these in my trunk when I bought my '70 Dart. Valuable? Acceptable for daily driver? Desirable? 2 slightly different vintages. more pics available.
on left- 3751424, 6724, 0454 on right-3870902, 7081, 0576 BR-5147 B

Thanks! Neilski

Image
Author:  terrylittlejohn [ Wed Feb 17, 2010 4:36 pm ]
Post subject: 
closest # i can match is the 3870902, seems to be a marine carb for a 225/6, they are carter 1bb for sure :?:
Author:  neilskiw [ Wed Feb 17, 2010 6:13 pm ]
Post subject: 
Right now, there is a Holley 1920 on the car, and it drips. I'd like to rebuild a carb without disabling the vehicle until the moment of switch.

If a guy had the choice of any 1 barrel... What would you choose? Bueller? Anyone?
Author:  SlantSixDan [ Wed Feb 17, 2010 7:07 pm ]
Post subject: 
Neither of these is a marine carburetor. They are both post-'74 Holley 1945 slant-6 passenger car carburetors in "old" condition. By all means toss one on and see if the car will run worth a toss and buy you some time to effect a better solution, but I wouldn't spend much of any money or effort on them (or on the 1920 under your hood unless it's in basically sound condition). My first-choice 1bbl carburetor for a slant-6 is a Carter BBS, but at this late date the preference priority is for condition of carburetor rather than make and model. Carburetor operation and repair manuals and links to training movies and carb repair/modification threads are posted here for free download. Avoid "remanufactured" carburetors; they're junk. I may have a new one on shelf for your car; if you want to go that route, send me a PM.
Author:  neilskiw [ Wed Feb 17, 2010 8:06 pm ]
Post subject: 
Thank you, Dan. PM Sent... I think?
Author:  neilskiw [ Fri Feb 26, 2010 9:26 am ]
Post subject: 
Using Dan's link and doing my homework, i determined that the carb on the right is a Gradient Power Enrichment Carb, California model 1945.

The one on the left is a 49 state model. Which brings me to the next question for anyone with an opinion... Which is better for fuel economy? Performance (performance is a relative term on a 150 K stock engine) ? Why?
Author:  SlantSixDan [ Fri Feb 26, 2010 9:33 am ]
Post subject: 
Again/still the answer is whichever one is in better (or "less decrepit") condition. The questions and answers that apply to new carburetors don't apply to old ones. If both are basically sound, the California one can probably be tweaked for better mileage, though performance and driveability will probably wind up short of the mark.
Author:  CNC-Dude [ Fri Feb 26, 2010 9:43 am ]
Post subject: 
I think that "performance" and "1 BBL." don't really go together. You are going to probably be looking for a mileage enhancement with one carb over the other you have to choose from. I would think if you are seeking a performance gain, then upgrading to a 2 BBL or 4 BBL intake and carb would be a good step to go in.
Author:  SlantSixDan [ Fri Feb 26, 2010 10:00 am ]
Post subject: 
Quote:
I think that "performance" and "1 BBL." don't really go together.
They go together just fine, depending on what one means by "performance". Often what is meant is really "driveability" -- quick starting, smooth running, crisp acceleration without hesitation, smooth cruising without surge, that kind of thing, which a properly-selected and -tuned 1bbl does just fine.
Author:  neilskiw [ Fri Feb 26, 2010 11:50 am ]
Post subject: 
Performance on this motor will be defined in terms of-
It starts, warms on a fast idle, idles smoothly when warm, accelerates on down the road, and gets better than the current 12 MPG.

At 40 years old, if it has lost 4 horsepower per year, it currently has negative 15 horsepower. I just need it to get me down the road. :lol:
Author:  Aggressive Ted [ Fri Feb 26, 2010 8:28 pm ]
Post subject: 
It is hard to believe your getting 12 MPG. What engine, carb and drive train gear ratio do you have?

While my good engine is out and being updated.....
I installed an old barn find for $150. which hadn't been run in years, covered with hay and dirt with many pieces missing...(fuel pump, distributor, carb)..I have had it in my car about a month now and the best it has gotten is 23 mpg. This engine is over 30 years old, almost solid rust on the outside and sure could use some love, but doesn't run all that bad. It sure is tough.....all I did was flush it out lots of chunks cam out when I drained what oil was in it, installed my 1920 carb and recurved distributor, and an old fuel pump from a 1961 SL6.

If you can rebuild one of your 1945's, bend the floats so they don't rub, carefully replace the accelerator pump and install a #60 jet you will get at least 18 mpg.
Author:  SlantSixDan [ Fri Feb 26, 2010 9:25 pm ]
Post subject: 
Quote:
It is hard to believe your getting 12 MPG

Naw, it ain't...dude's got a faulty carburetor! When my 1920 went bad, the car ran well but got 9.8 mpg. :shock:
Author:  Aggressive Ted [ Sat Feb 27, 2010 6:45 am ]
Post subject: 
Ouch!

I didn't think that you could get that much gas through such a small jet. Well, I guess if you were not moving, sitting in traffic for hours.........
Was your power valve stuck on? or was it missing some plugs in the economizer body?
Author:  neilskiw [ Sat Feb 27, 2010 7:18 am ]
Post subject: 
Ive got a 1945 apart, and the throttle plate is a little sloppy. I saw a thread where the T.B. was bushed. My shaft measures .3080 (save the dick jokes), so I'll need to use 1/4 X 3/8 bushings from the hdwe store, and get a metric drill bit of either 7.80 or 7.85 millimeters... unless there is an appropriate bushing kit available... Bueller? Ferris... Bueller? Anyone?
I'd rather not butcher any salvageable parts. Anyone know the dimensions of the throttle shaft on a 1920? Anyone around portland got one in their back pocket?
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