Break in question - Fuel in carb bowl vs priming line - Vintage Mustang Forums
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post #1 of 3 (permalink) Old 07-12-2019, 11:32 AM Thread Starter
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Break in question - Fuel in carb bowl vs priming line

I will pre-fill the bowl on the Autolite 2100 carb I am using before cam break in. Is that amount of fuel enough to allow the stock style mechanical fuel pump to get fuel through the empty lines to the carb (I am actually running from a gas can so only about 5-6 feet of hose to the fuel pump? I can figure out a way to prime the fuel hoses/pipes but not sure it is necessary.

At 2000-2500 RPM - I did some rough calcs and am guessing about 9.2 ounces per minute of fuel needed (14 MPG @ 60 MPH = 4.3 GPH = 9.2 oz/min). Again just an estimate. I am guessing the bowl hold 4-6 oz, but just eyeballing it.

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post #2 of 3 (permalink) Old 07-12-2019, 03:00 PM
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For initial startup of my rebuilt Cleveland, I poured a little gasoline into the vent tube from a Dixie cup. It was just enough to fire the engine and pull gas from the tank, through the fuel pump and into the carb.
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post #3 of 3 (permalink) Old 07-12-2019, 06:46 PM Thread Starter
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I was able to fill my fuel hose with a "bottle" (OK an old mustard bottle). Held it up higher than the carb and actually got fuel through the fuel pump and into the carb. So I should have fuel almost immediately.

Probably overkill, but not like I build do this every day so whats a little time to ease my overactive/overthinking mind....
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