Air filter for Model A

[Werner]

Hello carburetor men!

I have read these many posts because I do not know if my Zenith-2 has this balance passage or not. If I see the picture of pargeter correctly, then my carburettor is without balance, because the upper of the three holes goes only out in the air?

 

[Werner]

Because my carburetor makes irregularities (idle air jet completely screwed in, GAV 1/2 turn left, 7 gal. per 100 mls) I would like to repeat the previous question again.

 

[Jw]

my opinion, don't need an air filter

 

[Synchro909]

my opinion, don't need an air filter

But you will need to rebuild the engine more often. You'll go a long way without a filter but further with one
Obviously, I use one but fitting it is not so easy on a RHD car, especially if one uses one of those oil filters on the side cover. I use both oil and air filters.

 

[Y-Blockhead]

Hello carburetor men!

I have read these many posts because I do not know if my Zenith-2 has this balance passage or not. If I see the picture of pargeter correctly, then my carburettor is without balance, because the upper of the three holes goes only out in the air?

Because my carburetor makes irregularities (idle air jet completely screwed in, GAV 1/2 turn left, 7 gal. per 100 mls) I would like to repeat the previous question again.

That's correct. The air vent at the top in your picture would be sealed. The float bowl would be vented thru the carb throat. Thus it is vent to the inside of the air filter.

 

[Jerry in Shasta]

If filters are not needed why are they on modern cars??

 

[PalAl]

Contact
https://www.redquailearlyfordparts.com/

 

[Synchro909]

Contact
https://www.redquailearlyfordparts.com/

NO good on a RHD car!

 

[Werner]

Hallo!

Tom Wesenberg wrote in the past

If I wanted to add a balance tube, I'd buy a thin brass tube from the hobby shop or hardware store that fits tight into the air vent hole. It only needs to be about 3/4" long. Then slip a piece of tubing over the brass pipe and have it enter anywhere between the choke plate and air filer. This way you can have a balanced carb for an air filter without doing any cutting or drilling to the carb.

I imitated that today. I notice during the test drive no difference to the previous version.

 

[PalAl]

For Right Hand drive go to

https://www.redquailearlyfordparts.com/

scroll down for right hand drive air cleaner

 

[Synchro909]

For Right Hand drive go to

https://www.redquailearlyfordparts.com/

scroll down for right hand drive air cleaner

THanks PalAl but as I said in post # 184, they can't be used if you have an oil filter as well. I wouldn't drive like and where I do without both.

 

[Y-Blockhead]

Hallo!

Tom Wesenberg wrote in the past I imitated that today. I notice during the test drive no difference to the previous version.

Is your float bowl completely blocked off from the atmosphere?

See picture of 'Air Balance' Zenith below. Notice the air vent is closed off and the body and venturi are machined to route venting to throat of carb.

I think you need a larger vent tube also.

 

[Werner]

Blockhead, yes, the only air-vent of the bowl chamber is now the tube to the air filter tube. The brass conecting tube's diameter is about 1/5 inch outside.

 

[burner31]

Hold filter firmly in hand...throw as far as possible...drive car

 

[Werner]

Where does the air passage end in air-ballanced carburettor housing? (I mean the long bore-channel from the float chamber to the air intake.)

Thanks in advance!


Note without debate: I would never run a combustion engine without an air filter!

 

[Werner]

Hallo, I would like to ask again about the air-ballanced carburettor.

I suppose I've misunderstood that so far. I thought an air-balance carburetor would have a different underbody with an internal channel from the float chamber bore forward to the air intake (yellow). I think now that's wrong.

Is that niw in the following right:
1) I close the hole (red) in the float chamber.
2) I file a 2/10 inch wide open channel between float chamber and venturi.

Then this is right for air-ballancing?

Thank you in advance.

 

[katy]

Quote: Originally Posted by PalAl View Post Contact https://www.redquailearlyfordparts.com/
NO good on a RHD car!
__________________

Would it work with one of these?

 

[Y-Blockhead]

Werner, look closely at the modified venturi in post #92. The top vent to atmosphere in your picture also needs to be completely blocked off. The vent in my picture is filled with JB weld.

I will add a picture of my carb throat when I get a chance. I is vented just in front of the venturi. (towards the air filter).

3/16" hole in carb throat.

Renner's Corner balances carbs if you feel the need to get outside help. http://rennerscorner.com/index.html

 

[Y-Blockhead]

With the air balanced Zenith and this K&N filter on an Air Maze adaptor.https://www.amazon.com/gp/product/B000E7DMKE/?tag=atomicindus08-20

Not trying to convert members to running a filter, that is your choice. But why does my air filter have to be cleaned all the time? And I run engine pans??

 

[Werner]

Hallo Blockhead,
thank you for your effort. But I do not understand that correctly. On the picture # 92 it looks different. There, an open channel runs from the float chamber direct into the venturi tube (with negative pressure).