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CA fuel tank gravity flow

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Mr.Allis

05-10-2002 21:04:40




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How many psi is there coming from the gas tank going into the carb. on a 1952 CA?

Thanks




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Mr. allis

05-11-2002 21:13:08




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 Re: CA fuel tank gravity flow in reply to Mr.Allis, 05-10-2002 21:04:40  
Thanks for your help and infomation it has been helpful.

Thanks again



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gerald

05-11-2002 20:32:42




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 Re: CA fuel tank gravity flow in reply to Mr.Allis, 05-10-2002 21:04:40  
The hydrostatic gradient of water depending on its salinity is approximately 0.433 psi/ft. Since gas is lighter than water (ie: floats on water) its gradient is approximately 0.300 psi/ft depending on API gravity. Therefore if you have a full tank of gas and the top of the gas is 2' above the carburetor then the hydrostatic head at the carb is ( 0.300 psi/ft times 2' which equals 0.6 psi) Hope this helps.....

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Steve in N.J.

05-11-2002 20:16:16




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 Re: CA fuel tank gravity flow in reply to Mr.Allis, 05-10-2002 21:04:40  
Mr. Allis,

Being there isn't any pump to push or pull the fuel between the tank and the carb, and gravity is the only thing you rely on for the fuel to reach the carb,there probably isn't much for pressure. Because it's gravity fed, I would say as long as the fuel line as well as the fuel bowl is clear, you shouldn't have any problems with fuel delivery...Besides, I don't think that little Zenith, or Marvel carb (which ever carb your machine may be equipped with) could handle to much fuel pressure to start off with.....Steve

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joe from IOWA

05-11-2002 20:11:18




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 Re: CA fuel tank gravity flow in reply to Mr.Allis, 05-10-2002 21:04:40  
I spent alot of time on one of these fine old girls on my grandpas farm in the 70's....don't worry about fuel flow unless you have a lot of sediment in the tank. Here is a good AC tractor tip...put a in line fuel filter between the tank and the carburetor [napa #3031] and you will elimate any carb. problems. These tractors will run good until the tank is dry as long as the fuel system is CLEAN. Good luck! Allis-chalmers CA tractors ROCK! There is nothing better for lite field work than a CA ...regardless what color tractor you favor.

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Greg Ballantyne

05-11-2002 07:26:08




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 Re: CA fuel tank gravity flow in reply to Mr.Allis, 05-10-2002 21:04:40  
Since it is gravity flow the actual pressure will vary as the level of gas in the tank varies. The "head" (vertical distance between the carburetor and the gas level) determines the pressure. I don't know what sort of pressure range this translates to, howver. Probably different for gasoline that for water, specific gravity (density) of the fluid is different.



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acd17toy

05-10-2002 22:40:53




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 Re: CA fuel tank gravity flow in reply to Mr.Allis, 05-10-2002 21:04:40  
can not answer that. but if you are getting a full flow of fuel out of the gas line at the carb. the engine will run under almost any conations.



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steve

05-11-2002 10:07:03




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 Re: Re: CA fuel tank gravity flow in reply to acd17toy, 05-10-2002 22:40:53  
i agree, you need flow, not pressure. since the top of the tank is about 24 inches above the carburetor, static pressure wil be 1 psi with the tank full, and less wiht it 1/2 full. dont wory about the pressure, just get a good flow.



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Greaseman

05-11-2002 19:14:32




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 Re: Re: Re: CA fuel tank gravity flow in reply to steve, 05-11-2002 10:07:03  
I have no clue as to the actual "PSI" but it will increase if you crank the engine as I did this on my Super C and could see the fuel through the sediment bowl go from a slight trickle to almost full flow, real quick.



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steve

05-12-2002 05:52:11




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 Re: Re: Re: Re: CA fuel tank gravity flow in reply to Greaseman, 05-11-2002 19:14:32  
you are right that as you draw the fuel thru the line the FLOW will ncrease drastically, but the PRESSURE will remain constant at less than 1 psi. That is determined by the height of the tank above the carburetor.



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mr Allis

05-12-2002 14:52:14




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 Re: Re: Re: Re: Re: CA fuel tank gravity flow in reply to steve, 05-12-2002 05:52:11  
Thanks for all of the help and info.


Thanks again



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