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H. L. Chauvin · 01-22-2016, 01:36 PM

Overall size and amounts of "free air" passages through any particular air filter is of utmost importance for performance efficiency of an internal combustion engine ....... or even that of an air compressor and/or an air-conditioner filter in a residence.

Small Model A paper filters usually never give reasonable performance ..... especially when later plugged with dirt.

My "supposedly heavier" 1930 Briggs Town Sedan gets a constant 20 MPG in stop & go traffic with a "Hi-Boy" arrangement combined with an "oversized" K & N air filter; i.e., K & N Model No. R-1050, 3-1/2" outside diameter (OD) x 6" high.

Neither of my A nor B carburetors tried have added balancing tubes.

01-22-2016, 01:36 PM	#16
H. L. Chauvin Senior Member Join Date: May 2010 Posts: 4,179	Re: poor gas milage question Overall size and amounts of "free air" passages through any particular air filter is of utmost importance for performance efficiency of an internal combustion engine ....... or even that of an air compressor and/or an air-conditioner filter in a residence. Small Model A paper filters usually never give reasonable performance ..... especially when later plugged with dirt. My "supposedly heavier" 1930 Briggs Town Sedan gets a constant 20 MPG in stop & go traffic with a "Hi-Boy" arrangement combined with an "oversized" K & N air filter; i.e., K & N Model No. R-1050, 3-1/2" outside diameter (OD) x 6" high. Neither of my A nor B carburetors tried have added balancing tubes.