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Terry, NJ · 07-02-2018, 08:12 AM

It sounds as though you're thinking about going back to the A carb. My recommendation is don't do it! The model B carb is superior in every way, First, it breathes better having larger throat and throttle diameters, Second, the float is positioned to move sideways to the motion of the car. A carb floats move with the direction of the car and can be affected by sudden braking. Thirdly, a B carb has an accelerator jet which the A carb does not have. Is your intake manifold bored out to B size? (1.250-1.300) This is in the primary runner that feeds the other two runners. If not, you may not be getting the full advantage of the B carb.
Terry

07-02-2018, 08:12 AM	#4
Terry, NJ Senior Member Join Date: May 2010 Location: Bucks Co, Pa Posts: 3,740	Re: Model b carb It sounds as though you're thinking about going back to the A carb. My recommendation is don't do it! The model B carb is superior in every way, First, it breathes better having larger throat and throttle diameters, Second, the float is positioned to move sideways to the motion of the car. A carb floats move with the direction of the car and can be affected by sudden braking. Thirdly, a B carb has an accelerator jet which the A carb does not have. Is your intake manifold bored out to B size? (1.250-1.300) This is in the primary runner that feeds the other two runners. If not, you may not be getting the full advantage of the B carb. Terry Last edited by Terry, NJ; 07-02-2018 at 08:25 PM.