Fuel pump/weber carbs SBF
What kind of fuel pump is needed for the weber carb setup thanks Bob
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| Excaliber |
03-23-2004 06:28 PM |
Can a stock EFI fuel pump (mounted inside the stock fuel tank) create TO MUCH pressure and damage the needle/seat on the floats in the carb?
Ernie
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| csx700? |
03-23-2004 06:32 PM |
the weber carbs require a very low fuel presure, not more than 3 1/2 lbs. do not use a efi pump!
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| 427Aggie |
03-23-2004 06:56 PM |
Per Cal and Enzo you don't want to run more than 3 lbs..I am running a carter mechanical pump at have a regulator set at 2 lbs.
Matt
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| Excaliber |
03-23-2004 07:50 PM |
How does the pressure regulator work on an electic pump?
With EFI there is a return line so excess fuel (in this case pressure) is returned to the tank.
Ernie
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| BB427 |
03-23-2004 09:22 PM |
A Carter 4070 pump is a great pump for Webers. Regulate it at 3 to 3 1/2 lbs.
Avail through Jegs or Summit for about 60.00
Brent
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| TERRY M KRYSTOFIAK |
03-24-2004 06:23 PM |
I RUN 2.5 LBS WITH A REGULATOR, AND FUEL PRESSURE GAUGE IN THE DASH FOR EXTRA MEASURE. RUN THE CARTER ELECTRIC FUEL PUMP, WIRED TO AN ON /OFF SWITCH NEXT TO THE DRIVERS SEAT, NOT, REPEAT, NOT WIRED TO THE IGNATION SWITCH.
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| Cal Metal |
03-25-2004 04:23 AM |
The floats only weigh 25.5 grams so it doesn't take much pressure to overcome their ability to close the needle and shut down the fuel stream. EFI pumps run a minimum of 35 psi, and some up to as much as 100 psi (Mercedes). A fuel return line, however, is always a good idea, even with a standard electric or mechanical pump.
I especially like Terry K's idea of the on/off switch that is independent of the ignition. I had that set up in an old Corvette years ago. Makes for a nice security device, as well.
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