The Ford Barn

ronn · 01-28-2022, 07:02 PM

I mentioned in another thread that I bought 4 carbs this morning.....

well one looked odd and says zenith on it. I then summized that it is for a model B- having the square float chamber.

were these decent carbs? better or worse then a standard zenith for a model A?

thanks

Oldgearz · 01-28-2022, 07:23 PM

I run a model B carb on my 30 Coupe. Great pickup and acceleration. The B carb has an additional "power jet" that supplies gas through the throttle shaft supplying extra gas when the throttle is wide open. I love my B carb. Wanna sell it?

Ray in La Mesa · 01-28-2022, 07:43 PM

The "square float" carbs work better on the "A" than the "round drum" type. Not so subject to dying at stops.

Oldgearz · 01-28-2022, 07:54 PM

I agree about the float being better. I've never had problem with dying at stops. Be advised... practically impossible to get a new float for these B carbs that fits right, Repos are a mess...float hits on needle valve and float flange is soldered in wrong place. I bought 2 that wouldn't even fit into the float chamber.

ursus · 01-28-2022, 10:26 PM

Quote:

Originally Posted by Ray in La Mesa

The "square float" carbs work better on the "A" than the "round drum" type. Not so subject to dying at stops.

The square (actually rectangular) float B carbs have a different idle jet arrangement than the round drum float B carbs. If the round float idle jet is clear and without any gunk it will idle just as well as the "square" (rectangular) float type.

ronn · 01-29-2022, 04:47 AM

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thanks for the info. never saw one and was shocked when I read zenith on it.

just ordered the kits last night and a friend is rebuilding them for me.

Gene F · 01-31-2022, 07:38 PM

I have a B carb. Took it all apart to rebuild. Put it in a 5 gallon bucket of Berryman Chem Dip for a week. Rinsed it out, blew it out. Seems like it accelerates nice till I floor it. If I het up just a vary little bit it seems fine. I ran a wire down through the power jet tube too...what could be wrong? If I take that fuel line loose the gas sure does flow! LOL

Terry, NJ · 02-02-2022, 08:29 PM

I consider a B carb to be superior to an A carb, here's why! First off, B carbs have a larger throat (1.250) which can process more fuel, air mixture. The mod. A is starved for gas. It needs this. Second, The float swings crosswise to the A float. No more pesky stalling at a sudden stop which A carb have been known to do. Third, There is an accellerator tube that provides slightly more gas on acceleration than the A carb. Incidentally, the A engine with a B carb manifold will perform better by 1 to 2 HP just having the bored out runner. Reference, Piriano's Dyno tests.
Terry

01-28-2022, 07:02 PM	#1
ronn Senior Member Join Date: Feb 2011 Location: NNNNNNNNJJJJJJJJJJ Posts: 6,789	32-34 zenith carb I mentioned in another thread that I bought 4 carbs this morning..... well one looked odd and says zenith on it. I then summized that it is for a model B- having the square float chamber. were these decent carbs? better or worse then a standard zenith for a model A? thanks

01-28-2022, 07:23 PM	#2
Oldgearz Senior Member Join Date: Aug 2020 Location: Sagle, Idaho Posts: 359	Re: 32-34 zenith carb I run a model B carb on my 30 Coupe. Great pickup and acceleration. The B carb has an additional "power jet" that supplies gas through the throttle shaft supplying extra gas when the throttle is wide open. I love my B carb. Wanna sell it?

01-28-2022, 07:43 PM	#3
Ray in La Mesa Senior Member Join Date: May 2010 Location: La Mesa Ca Posts: 1,166	Re: 32-34 zenith carb The "square float" carbs work better on the "A" than the "round drum" type. Not so subject to dying at stops.

01-28-2022, 07:54 PM	#4
Oldgearz Senior Member Join Date: Aug 2020 Location: Sagle, Idaho Posts: 359	Re: 32-34 zenith carb I agree about the float being better. I've never had problem with dying at stops. Be advised... practically impossible to get a new float for these B carbs that fits right, Repos are a mess...float hits on needle valve and float flange is soldered in wrong place. I bought 2 that wouldn't even fit into the float chamber.

01-29-2022, 04:47 AM	#6
ronn Senior Member Join Date: Feb 2011 Location: NNNNNNNNJJJJJJJJJJ Posts: 6,789	Re: 32-34 zenith carb Sponsored Links (Register now to hide all advertisements) thanks for the info. never saw one and was shocked when I read zenith on it. just ordered the kits last night and a friend is rebuilding them for me.

01-31-2022, 07:38 PM	#7
Gene F Senior Member Join Date: Mar 2012 Location: Ohio Posts: 1,969	Re: 32-34 zenith carb I have a B carb. Took it all apart to rebuild. Put it in a 5 gallon bucket of Berryman Chem Dip for a week. Rinsed it out, blew it out. Seems like it accelerates nice till I floor it. If I het up just a vary little bit it seems fine. I ran a wire down through the power jet tube too...what could be wrong? If I take that fuel line loose the gas sure does flow! LOL

02-02-2022, 08:29 PM	#8
Terry, NJ Senior Member Join Date: May 2010 Location: Bucks Co, Pa Posts: 3,740	Re: 32-34 zenith carb I consider a B carb to be superior to an A carb, here's why! First off, B carbs have a larger throat (1.250) which can process more fuel, air mixture. The mod. A is starved for gas. It needs this. Second, The float swings crosswise to the A float. No more pesky stalling at a sudden stop which A carb have been known to do. Third, There is an accellerator tube that provides slightly more gas on acceleration than the A carb. Incidentally, the A engine with a B carb manifold will perform better by 1 to 2 HP just having the bored out runner. Reference, Piriano's Dyno tests. Terry