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Farmall & IHC Tractors Discussion Forum
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400 carb Fuel Pump

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Steve Weathers

06-03-2007 19:18:33




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Is it possible that my 400 at about 2250rpm in a hard pull is running out of fuel with glass bowl and brass line.Is any one thought of fuel pump or maybe 3/8 line.

Thanks for any info Steve




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Steve Weathers

06-04-2007 20:49:04




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 Re: 400 carb Fuel Pump in reply to Steve Weathers, 06-03-2007 19:18:33  
Thanks to all Drained my tank today have a lot of rust at about every point u could think of.Should run fine when all is clean.U dont think that a 3/8 line would suppply carb faster than stock line



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the tractor vet

06-04-2007 21:01:40




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 Re: 400 carb Fuel Pump in reply to Steve Weathers, 06-04-2007 20:49:04  
Nope . as the hole in the needel and seat is what is the determining factor here Plus the hole from the tank into the sediment bowl. You are only feeding nomore then 281 cubic inch engine with a signal barrel updraft carb not a big holley 4 bbl.



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BDM

06-03-2007 21:49:23




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 Re: 400 carb Fuel Pump in reply to Steve Weathers, 06-03-2007 19:18:33  
A friend has run his as high as 2600 rpm with out any issue, using the stock fuel system.



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the tractor vet

06-03-2007 20:22:29




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 Re: 400 carb Fuel Pump in reply to Steve Weathers, 06-03-2007 19:18:33  
It is not likely that you are running out of fuel if everything is clean and open . Going to a 3/8th line is not going to help ya one tenie tiny bit as you can only put somuch fuel thru the needel and seat . Myself i would pull the sediment bowl and amke sure that there is nothing stuck in the inlet then check the screen at the carb in the inlet fitting . Now i know that i am going to get bad mouthed here but you can run your 400 at that RPM if it does not have alot of vibration . some engines run smoother then others . the down side is that you realy gain nothing at that RPM as you are getting out of the range of the cam for power and the valve springs are not heavy enough to return the valves to the seats fast enough . myself i don't realy like going over 2000 on and old 4 banger as they are not realy balanced and with the lenght of the stroke.

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CNKS

06-03-2007 19:52:25




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 Re: 400 carb Fuel Pump in reply to Steve Weathers, 06-03-2007 19:18:33  
Your engine will last longer if you drop it back to the rated full load rpm of 1450. 2250 is exceeding the safe limits of that engine if run that way for long periods of time.



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old

06-03-2007 19:43:09




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 Re: 400 carb Fuel Pump in reply to Steve Weathers, 06-03-2007 19:18:33  
Putting a fuel pump on it would cause you more problems then it would fix. The gravity flow fuel system have worked just fine for 50 plus year. You need to clean out the sediment bowl assembly and maybe the fuel line and maybe even rebuild the carb



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randy hall

06-03-2007 19:40:06




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 Re: 400 carb Fuel Pump in reply to Steve Weathers, 06-03-2007 19:18:33  
not unless something is partially blocked.



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