The Ford Barn - View Single Post - My new 1930 2-dr sedan

nkaminar · 01-10-2026, 08:01 AM

The filters that filter out rocks will not restrict air flow to the point where the Model A stock carburetor will run rich. Any other filter needs the modification to the carburetor. In the stock carburetor the float chamber is open to the atmosphere. In the modified carburetor the float chamber is open to a point in the carburetor after the filter but before the venturi.

My heavy 30 Fordor gets 20 mpg on back roads at 50 mph. But only 16 mpg at 65 on the highway. (I have overdrive.) Windage is the major factor for mpg for a Model A. A high compression head will help with mpg.

01-10-2026, 08:01 AM	#95
nkaminar Senior Member Join Date: Jan 2012 Location: Western North Carolina Posts: 6,857	Re: My new 1930 2-dr sedan The filters that filter out rocks will not restrict air flow to the point where the Model A stock carburetor will run rich. Any other filter needs the modification to the carburetor. In the stock carburetor the float chamber is open to the atmosphere. In the modified carburetor the float chamber is open to a point in the carburetor after the filter but before the venturi. My heavy 30 Fordor gets 20 mpg on back roads at 50 mph. But only 16 mpg at 65 on the highway. (I have overdrive.) Windage is the major factor for mpg for a Model A. A high compression head will help with mpg. __________________ A is for apple, green as the sky. Step on the gas, for tomorrow I die. Forget the brakes, they really don't work. The clutch always sticks, and starts with a jerk. My car grows red hair, and flies through the air. Driving's a blast, a blast from the past. Last edited by nkaminar; 01-10-2026 at 08:09 AM.