Re: Air filter for Model A
 

And the groove machined into the outside of the venturi routes the vent to the 3/16" hole to the carb throat. The "channel" from the float bowl does not go into the venturi, it goes around the outside of the venturi to the throat of the carb. I don't know how to better explain it.

https://live.staticflickr.com/65535/...84e6813d7c.jpg

Re: Air filter for Model A
 

Blockhead, I try it again. Please see picture. Sorry for my bad understanding.

Re: Air filter for Model A
 

I would like to ask if somebody can explain something to me about the milling between the float chamber and the venturi hole.

Re: Air filter for Model A
 

I didn't get too worked up about doing this. I don't have a milling machine and there is no need for great precision. I used a die grinder there asnd on the lip under the venturi.

Re: Air filter for Model A
 

Katy, just back from yet another rally. Sorry for the delay replying.
I haven't seen either one of those air filters or one of those oil filter mounts on a car, let alone both at once. Your suggestion might work.
Has anybody tried it???

Re: Air filter for Model A
 

Hallo again,
I changed the Zenith-2 again on air-ballance today. From the float chamber directly above the choke flap shaft's front. Instead of brass, I used this time 1/5 inch copper tube, which can bend broken fracture-free and therefore build in one piece from hole to hole.

Re: Air filter for Model A
 

Now I have to ask again: I have just noticed today that there is in the upper carburetor housing an additional hole for venting. Above the hole in the under housing. (I do not understand the reason because 1 is enough.)

I think now that I have to close this hole too?

Re: Air filter for Model A
 

Addition:
Here in the book picture the channel is drawn. Unfortunately, he is not mentioned in the text.

Re: Air filter for Model A
 

The ebay seller says it's 2 copper elbows.

Re: Air filter for Model A
 

That is not an original hole. I'd seal it too as you suggest.

Re: Air filter for Model A
 

If you modify the carb for an internal vent to the front of the choke, to use an air filter, then you also need to block off the original external vent.

Re: Air filter for Model A
 

Re: Air filter for Model A
 

So long as the vent is between the air filter and the venturi, it doesn't matter. The pressure will be the same anywhere in that piece of the intake.

Re: Air filter for Model A
 

I think Charlie summed it up perfectly. Why not have your Model A run as Henry wanted it to during your life time! You don't need the air filter. Just my take, Ed

Re: Air filter for Model A
 

That’s funny!:D

Re: Air filter for Model A
 

Error. With the sealed hole the engine was not adjustable and too rich. The ventilation hole in the upper housing is necessary to get air into the channel for the idle needle!

Blockhead: Meanwhile, I have the hose line as shown by you in the area of ​​the choke flap. Thank you!

Synchro: Your comment is correct. Nevertheless I have now the tube pipe layed to a short distance before the choke flap achsle to get a shorter pipe.

Thanks to the helpers! Now my engine sucks in dust-free air and the carburetor does not mix too rich.

Re: Air filter for Model A
 

Yes, you and I know that. I was asking Werner.

Please tell me why my air cleaner gets dirty. And I run engine pans.