Technical touchy carburetors

after countless struggles with my rochester B 1bbl am seriously considering a much more reliable replacement! can anyone out there give me some good detailed optioins? thanks,Frustrated Beau

 

I like the Quick Fuel Carbs. Pretty much like Holleys.
Kurt

 

I put a Daytona carb on a 6 cylinder Chevy for a guy, seemed to be easy to tune and he's happy with it.

 

Uh , kinda hard for recommendations for a carb without knowing the application.

 

What kind of trouble are you having?

 

Black and Decker aquarium pump

 

Sadly No, they are made off shore now.

 

Take a look at rebuilt Carters. Sure to have one to match your app.

 

"Uh , kinda hard for recommendations for a carb without knowing the application."
Aw, c'mon, it's a rochester B 1bbl! optioins, anyone?

 

I didn't realize the older Carters are getting harder to find these days. Plenty of kits but not many sources for rebuilt ones.

https://carbkitsource.com/carburetors/index.html These are new, don't know much about them though. http://www.carburetor-parts.com/Replacement-Carburetor-for-Rochester-B_p_4411.html

 

The OP's profile suggests he/she has a 1949 Chevrolet truck.

In which case, the original would have been a Carter type W-1 identification 684s. This is an excellent carb, but as it is a one-year, one-make, one-model with unique parts; rebuilding kits are EXPENSIVE!

The 1948 carburetor was a Carter type W-1 identification 574s. Excellent carb, almost as common as dirt, inexpensive parts, inexpensive carb. The functional difference from the 574s to the 684s was the addition of a link from the choke that opened the throttle when the choke was on, acting as a fast idle link.

Chevrolet, in 1950, replaced the excellent Carter W-1 with the less-than-excellent (trying to cut down on bad-mouthing) Rochester B, which MAY be what the OP has; would have been nice to know.

Carter then released a number of type YF replacement carbs for the various type B Rochesters. The original Carter replacement for the replacement B that replaced the 684s was YF 787s. 787s was later replaced by 964s. Both 787s and 964s are excellent carburetors, relatively available, and relatively inexpensive. Also parts are readily available, and relatively inexpensive.

The 574s is virtually bullet-proof.

The 787s and 964s are slightly advanced in technology over the 574s, but both use diaphragm accelerator pumps. On a "daily driver", the diaphragms work very well. On an enthusiast vehicle that is driven only occasionally, the use of ethanol-laced fuels can cause premature failure of the diaphragm.

Jon.

 

Most folks do have a lot of trouble with the "B". I seem to have better luck than just about anyone due to a few details.
1. Each of the 3 big pieces get straightened & trued. 120% of the air horns are warped from over tightening. When using new gaskets, soak in gas before ass'y. & tighten the screws several times after fireup & some use - but don't try to stop leakage by overtightening.
2. The seat for the power valve steel ball is often corroded or nicked - dress it.
3. Use a ball deglazer in the pump barrel until all the scoring is gone.
4. Eliminate ALL slack in acc. pump linkage.
5. Keep fuel pressure at 2 1/2 lbs.
6. Keep teflon tape & deathanol fuel away from them.

 

Ditch the leaky, stinky B for a Carter YF. I've use them on 3 vehicles with great success, a 230 chevy, a 235 chevy and a 261 Chevy. The 261 runs a Ford 240/300 YF with a .110 main jet........it runs soooooo nice.

 

What model number or year of Ford YF replaces the Rochester, I've got ditch my leaking carb in a bad way! Lol

 

I used the 6420s and made a bolt on piece for the accelerator linkage.

 

Here's a list for the yf.

https://www.stovebolt.com/ubbthreads/ubbthreads.php?ubb=showflat&Number=727247