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 Air Bleed Characteristics 
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Paper on Air Bleeds


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Sun Apr 21, 2013 5:02 pm
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WARNING: MAY CAUSE A BRAIN EXPLOSION!!!
:wft?: :ummm?: :omg:

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Sun Apr 21, 2013 6:00 pm
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Sun Apr 21, 2013 10:13 pm
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Aw come on. It ain't that tough. It only took me about 20 reads to get it.

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Sun Apr 21, 2013 10:22 pm
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Booster wrote:
Aw come on. It ain't that tough. It only took me about 20 reads to get it.

You are right. . it does start to become slightly clearer with a few readings. . .

To convert this to 'Holley-speak'. .
Depth of the air bleed 'ha' is the location of the E bleeds in the block, relative to the float level?

Air jet diameter 'fa' is either the size of the MAB, or the collective sizes of the E bleeds??

'Q' being airflow through the carb (throttle position and RPM)?

Nozzle area 'fn' is the booster orifice?

?? Am i close????

My head hurts again. . . . . :wft?:

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Sun Apr 21, 2013 11:59 pm
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One of the things that that makes reading this difficult is the fact that it's translated from Japanese. Sometimes the syntax is a little off.

Another thing is that we talk of mainwells, exit channels and booster passages when discussing calibrations. Most of these papers use the term "nozzle". This is the area from the back of the jet to where the fuel mixture exits the booster passage. In other words, the mainwells, exit channels, and the booster exits are one.

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Mon Apr 22, 2013 11:54 am
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http://motorsportsvillage.com/forum/vie ... f=6&t=7410
Better English here......


Mon Apr 22, 2013 12:10 pm
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Graph showing Main and Emulsion Bleed behavior is from Edward F. Obert's book, "Internal Combustion Engines".

Holes A and B are "Emulsion" bleeds.

D is the Main Air Bleed.

This is a generalized description of carb bleed behavior. Venturi area relative to main circuit flow path area and engine air flow range affect these characteristics.


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Tue Jun 03, 2014 3:43 pm
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tuner wrote:
Graph showing Main and Emulsion Bleed behavior is from Edward F. Obert's book, "Internal Combustion Engines".

Holes A and B are "Emulsion" bleeds.

D is the Main Air Bleed.

This is a generalized description of carb bleed behavior. Venturi area relative to main circuit flow path area and engine air flow range affect these characteristics.



So I'm looking at this chart, am i understanding it right that if u don't have enough holes at A,B it will delay the mains also? Is that what the line is showing its starting late?

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Tue May 16, 2017 8:36 am
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Yes, too many or too large well bleeds can cause the early start up that goes rich then lean before flattening.

Motrhead made a graphic representation which can be helpful keeping in mind its limitations.
See More in depth e-hole discussion, with pictures!
Good, but long read with feedback from both Shrinker and Tuner.


Wed May 24, 2017 9:26 pm
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