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Old 01-15-2020, 09:02 PM   #1
derek costello
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Default #94 carb flow detail.

The detail sheets that were displayed by barn member are not available for sale,

so I ask any members to explain (like the drawings illustrate) how fuel is

diverted in a "94" from one aspirated channel or the other without valves ?

The drawings show 3 distinct paths that the fuel follows, depending on throttle

position but no way of path diversion?

Anybody know?
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Old 01-18-2020, 04:17 PM   #2
derek costello
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Default Re: #94 carb flow detail.

OK nobody replied to my carb flow question so I continued research, what I found is a book called. "1932 to 1941 service handbook. This book goes into great detail on the flow of fuel paths in a Ford "94" carburattor.
I also has nice clear printable diagrams showing the 4 states of diversion of fuel in the "94". The idle circuit, the main circuit, the power valve circuit and the accelerator pump circuit. All of these flow-path changes are controlled by throttle position only. This is all governed by fuel weight (with or without bubbles) and vacuum. Their are two pages of description. Fantastic engineering, all done without valves, is there enough interest to do a post on this?
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Old 01-18-2020, 07:31 PM   #3
frnkeore
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Default Re: #94 carb flow detail.

I would love to see your info and diagrams on this.
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Old 01-18-2020, 11:21 PM   #4
Alaska Jim
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Default Re: #94 carb flow detail.

I would also like to see it.
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Old 01-19-2020, 02:47 PM   #5
derek costello
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Default Re: #94 carb flow detail.

OK: Here is the detail on the series of carbs know as the ford 94, because of the different venturi sizes there were many levels of jet and power valve sizes, the text some times refers to other carb specs that were common to the early design.
Read carefully as you follow the fuel through the 4 stages of throttle position
and relate it to the flow arrows on the drawings. Pay particular attention to the tiny little ports where air is dragged-in to emulisify the fuel thereby making it less dense and more likely to respond to throttle changes!
You will note also how fuel is drawn up the inside of the aspirator tube and a ever-so-slight change in throttle causes the fuel to be drawn up around the outside of the idle aspirator tube. Fascinating engineering.
Attached Images
File Type: jpg 94 carbs.jpg (37.1 KB, 18 views)
File Type: jpg 94 carbs 1.jpg (21.1 KB, 27 views)
File Type: jpg 94 carbs 2.jpg (23.9 KB, 16 views)
File Type: jpg 94 carbs 3.jpg (22.6 KB, 13 views)
File Type: jpg 94 carbs 4.jpg (30.0 KB, 10 views)
File Type: jpg 94 carbs 5.jpg (32.9 KB, 14 views)

Last edited by derek costello; 01-19-2020 at 03:09 PM. Reason: want to add pictures
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