Air Maze Air Filter on Zenith Carb Question

Conaway2 · Oct 31, 2019

’ve used the Air Maze filter for almost 30 years - recently replaced the ‘screen’ filter element for a real paper air filter. The rebuilt engine was installed in March, carb rebuilt a couple of months ago - engine runs very well. I can turn the GAV off and the engine begins to stumble, so I believe at 1/4 turn of the GAV out, the engine is getting a pretty reasonable mix of gas/air.

However, I changed spark plugs a couple days ago - swapped some Motorcraft pugs from Bratton’s (since March) for a set of Champion 3Xs and noticed that the Motorcraft plugs had quite a bit of carbon on them, I wondered if the air filter was making the fuel mix too rich. I;ve read about this, and wonder if I need to do something to the Zenith carb to compensate for the air filter.

thoughts ??

thanks - Jim

redmodelt · Oct 31, 2019

Get rid of the paper element and put the screen back on. The paper element is a fire hazard. If it worked for 30 years why change it?

al's28/33 · Oct 31, 2019

I agree, if you run an air-maze the use the wire screen DO NOT USE PAPER

30 Closed Cab PU · Nov 1, 2019

Or use a High Boy adapter with a K and N filter. If you do not care about looks, or are a purist, is an option

160B · Nov 1, 2019

eagle · Nov 1, 2019

I've used an AirMaze for years. Plugs look great. I use a fiber mesh filter over the top of the AirMaze and use oil on the screen. I use about 1/4 turn GAV except when highway cruising. Then its maybe 1/8 open or less.

Bob Bidonde · Nov 2, 2019

Anything you put at the inlet of the carburetor is going to reduce the inlet air flow, and reduce engine power.

WHN · Nov 2, 2019

redmodelt said:
Get rid of the paper element and put the screen back on. The paper element is a fire hazard. If it worked for 30 years why change it?

I would take this advise ASAP.

Ours has been on for over 40 years. No problems.

1/4 turn is also really good sign. Enjoy.

Jimczeb · Feb 23, 2024

how do i install the maze filter on my model A. any pictures available? do i need a rubber gasket?

Y-Blockhead · Feb 23, 2024

Jimczeb said:
how do i install the maze filter on my model A. any pictures available? do i need a rubber gasket?

Just tighten the screw. https://www.snydersantiqueauto.com/product.htm?pid=979483&cat=41659

Air Maze Air Filter on Zenith Carb Question

Conaway2

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redmodelt

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al's28/33

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30 Closed Cab PU

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160B

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eagle

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Bob Bidonde

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WHN

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Jimczeb

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Y-Blockhead

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