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Registered
Join Date: Dec 2001
Location: Arvada Colorado
Posts: 2
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electric fuel pump and pressure regulator
Happy New Year!
I have a 67 912 that I will put an electric fuel pump on. I plan to mount it in the engine compartment on the L side where the fuel line enters. My question is this; do I need to put a pressure regulator in the line? I am using a Facet pump. Thanks for the help
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12-31-2001, 04:47 AM
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I bought my car with an electric fuel pump and it also has a pressure regulator. The pump is under the the front trunk area and the pressure regulator is in the engine compartment, just before the carbs.
The pressure regulator has a dial that goes from 1 to 10 and it is set at 2. This set up is for Weber carbs. The fact that the pressure is reduced so much tells me that you probably need a regulator. What brand of carbs do you have? If you have Webers, give the folks at www.cbperformance.com a call. They know their Webers and will get you on the right track. You need to find out the required pressure for your carbs and the output of your pump. Hope this helps! Happy New Year!
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Adam White Current: 1971 Alfa Romeo GT1300JR Gone but not forgotten:68 912, 76 911S, 72 911T, 1983 Audi UR Quattro |
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01-01-2002, 04:55 PM
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Facet pump should work fine without psi reg if your needles and seats are in order. I'm not sure but I believe the facet pump max psi is 6psi if pinched off. Webers require 4 psi to operate properly 6 psi should do the trick just right.
Also Adam if your regulator is the chrome type with the knob the #2 setting is too low and could possibly starve for fuel on a long stretch of road a wide open throttle. I would set it at #5 (5psi) and while idling you will know if your needle and seat will hold the pressure. In theory it doesnt matter if the psi is 12 psi or 1 psi as long as it don't bypass the needle and seats or starve for fuel. Remember that pressure in the carb bowls will always be atmospheric psi. Norm have you considered a rebuild kit for you mechanical pump? Facet pumps have a very ugly sound. The rebuild is cheap ($35.00?) and very simple. And that will simplify the critical carb adjustments that plague the carberated p-cars.
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Never drive faster than your gaurdian angel can fly. 82 SC w/965S eng and G50 6:1 hp/w ratio 72 911t 2.6 twin plug and 72' 911t 57k orig 1 own miles 65/66 912 1 owner 76k orig 01' Aston Martin DB7 V12 Vantage Coupe 6spd |
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01-01-2002, 05:40 PM
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Thanks Kurt, I'll dial it up to #5. You're, the electric pump is noisy.
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Adam White Current: 1971 Alfa Romeo GT1300JR Gone but not forgotten:68 912, 76 911S, 72 911T, 1983 Audi UR Quattro |
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01-01-2002, 05:57 PM
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1968 Porsche 912 1720 cc Big Bore 
1969 Porsche 911 2.7 
