B carb

Ya know, on a more modern car (like something from the 70s) I was always taught that the air fuel mixture screws do zero when the car is running down the road.

After adding that O-ring, I wonder how much turning of that screw it takes to maximize the idle performance. Pretty interesting.

I see the gross-jet that would be controlled by the float. I have heard that you need to pull that in favor of the traditional needle and seat if you want maximum performance with a B carb on the top-end.
 
I run a B carburetor and it idles great and I think Renner's had me add the O-ring. David also machined the carburetor to allow for the use of an air-filter. Lol When I bought the air filter I did not realize I had a B-carburetor instead of an A so the air filter housing had to be machined to fit the B carb. I had the carburetor apart several times before I got it right but now it purrs like a Model A.
 
Gene, thanks for that info on the grose jet, I will replace it.
Lawrie
 
Last edited:
Gene F said:
Ya know, on a more modern car (like something from the 70s) I was always taught that the air fuel mixture screws do zero when the car is running down the road.

After adding that O-ring, I wonder how much turning of that screw it takes to maximize the idle performance. Pretty interesting.

I see the gross-jet that would be controlled by the float. I have heard that you need to pull that in favor of the traditional needle and seat if you want maximum performance with a B carb on the top-end.
Click to expand...

Is there a source for those valves? Snyders only have the Viton tipped ones.
 
Gene F said:
I see the gross-jet that would be controlled by the float. I have heard that you need to pull that in favor of the traditional needle and seat if you want maximum performance with a B carb on the top-end.
Click to expand...

I have never had a problem with fuel flow through the gross-jet ball style float valves. Mine can keep up with fuel demand just fine.

Where did you get this caution?
 
You must log in or register to reply here.
Back
Top