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Old 09-06-2008, 07:55 PM
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high volume fuel pump?

will a 110 gph high volume fuel pump with 6psi max be too much and flood the carb. this is what im experiencing, has anyone else?

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Old 09-06-2008, 08:06 PM
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6 psi is not excessive in a carb'd application. The 110 gph is the volume of gas it can deliver but at a low pressure. If you are having flooding problems it is most likely due to the needle & seat not closing the fuel supply off completely or the float(s) are set too high causing the same condition.
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Old 09-07-2008, 05:13 PM
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I don't understand why you guys want to run the fuel pressure right up at the ragged edge. Any comtemporary 4-bbl will run great at 5 psi, as long as you run fuel lines large enough to cover volume.
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Old 09-07-2008, 08:45 PM
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Quote:
Originally Posted by techinspector1
I don't understand why you guys want to run the fuel pressure right up at the ragged edge. Any comtemporary 4-bbl will run great at 5 psi, as long as you run fuel lines large enough to cover volume.
i dont want too, my carb will run on another car with a stock 6psi oem pump. but will flood with a high volume 110 gph pump at 6psi.
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Old 09-08-2008, 10:17 PM
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Quote:
Originally Posted by runn141
i dont want too, my carb will run on another car with a stock 6psi oem pump. but will flood with a high volume 110 gph pump at 6psi.
6 psi is 6 psi, no matter if the pump flows 1,000 gallons per hour. I'm thinkin' you didn't have a valid fuel pressure gauge on either car and are guessing. If the carb will run ok on the other car, then the other car has less fuel pressure at the carb inlet than your car does. Plain and simple.
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Old 09-09-2008, 11:43 AM
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Quote:
Originally Posted by techinspector1
6 psi is 6 psi, no matter if the pump flows 1,000 gallons per hour. I'm thinkin' you didn't have a valid fuel pressure gauge on either car and are guessing. If the carb will run ok on the other car, then the other car has less fuel pressure at the carb inlet than your car does. Plain and simple.
There you go using common sense again, I would have thought you would have learned about that by now...
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Old 09-09-2008, 12:17 PM
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Check your actual running fuel pressure. I just installed two carter electric #p4594 "72GPH free flow, 7psi pumps". Both identical. One has the expected pressure and works fine without a regulator. The other cranks out 13psi static and will maintain that 13psi when flowing thru a .097" orrifice. So it will need a regulator to tame the fuel pressure down to 6-7psi or the carb will flood.
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Old 09-10-2008, 03:17 AM
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update:
i have to change the piston rings now because there is not enough compression to start the motor. the gas has damaged the back 4 cylinders. and i did have valid fuel pressure gauge and was not guessing.
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