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01-31-2007, 07:51 PM | #1 |
Alright Alright Alright
Join Date: Mar 2004
Location: Midland, Texas
Posts: 1,672
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using an electrical fuel pump
im recently helping a buddy build a vortec headed 350 that doesnt accept mechanical fuel pumps. we bought a electrical fuel pump from mr. gasket and it says 12s on the side. we tried to start it today and it kept on clicking after it was already primed. then it looked like fuel was leaking out of the primary throttle shaft on the carb (quadrajet). what does the 12s mean. does this pump put out too much pressure? the engine didnt start anyways (initial start up and there a ton of things off im sure). what do yall think?
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1972 Cheyenne Chevrolet red and white 357ci, Vortec heads, GM Performance high rise intake, Comp 268H .454/.454 218/218 110 LSA Quadrajet carb, Flowtech headers, 2.25 40 series HEI, Curve kit, TH 350, 3.07 gears 275/60/15s on 15x8 rallies |
01-31-2007, 07:57 PM | #2 |
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Location: ** THE FALL GUY **CHICAGO IL
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Re: using an electrical fuel pump
YEA.. you have to have a fuel pressure requlator in line set at 6-7 psi
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01-31-2007, 08:27 PM | #3 |
Senior Member
Join Date: Oct 2006
Location: Edmonton Alberta
Posts: 458
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Re: using an electrical fuel pump
i agree rat n rage, another way fuel comes out the shaft is if the float is set way to high, check pressure first though.
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01-31-2007, 11:25 PM | #4 |
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Join Date: Jun 2006
Location: Olive Branch, MS
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Re: using an electrical fuel pump
I ran into the same prob. Using a TBI 350 bottom end with Vortec heads. We used a Jeg's pump. Here is the link. The truck is still in the build process, but we fired the motor and ran it a couple minutes using this pump with no regulator and didn't seem to have any problems.
http://www.jegs.com/webapp/wcs/store...9850_-1_360609
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02-01-2007, 12:31 AM | #5 |
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Re: using an electrical fuel pump
12 maybe 12 volts system most electric pumps go 4-7 lbs
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02-01-2007, 12:33 AM | #6 |
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Re: using an electrical fuel pump
so what does the 12s mean, 12 psi? do i need a pressure regulator(mr. gasket)?
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1972 Cheyenne Chevrolet red and white 357ci, Vortec heads, GM Performance high rise intake, Comp 268H .454/.454 218/218 110 LSA Quadrajet carb, Flowtech headers, 2.25 40 series HEI, Curve kit, TH 350, 3.07 gears 275/60/15s on 15x8 rallies |
02-01-2007, 01:22 AM | #7 | |
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Re: using an electrical fuel pump
Model #.
Instruction sheet Quote:
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02-01-2007, 10:54 AM | #8 |
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Re: using an electrical fuel pump
i followed all of these instructions. will a regulator have to be used?
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1972 Cheyenne Chevrolet red and white 357ci, Vortec heads, GM Performance high rise intake, Comp 268H .454/.454 218/218 110 LSA Quadrajet carb, Flowtech headers, 2.25 40 series HEI, Curve kit, TH 350, 3.07 gears 275/60/15s on 15x8 rallies |
02-01-2007, 01:07 PM | #9 |
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Re: using an electrical fuel pump
If you are still unsure then put a pressure gauge on the pump outlet and measure it. If it 7psi or less, save your money. We use this type of pump on all of our gasoline powered generators (utility district) and most are at 5psi. The ticking you mentioned earlier is normal when power is applied to the pump, the built in pressure relief prevents excess pressure to be created. I would be more inclined to ensure carburetor adjustments are set correctly, i.e. float level, etc.
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Oscar '72 Shortbed Fleetside '95 Jimmy 4X4 '69 GMC Custom Camper |
02-01-2007, 11:11 PM | #10 |
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Re: using an electrical fuel pump
would this pump cause the carb to leak if there was too much pressure? the the carb was off of a perfectly running motor.
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1972 Cheyenne Chevrolet red and white 357ci, Vortec heads, GM Performance high rise intake, Comp 268H .454/.454 218/218 110 LSA Quadrajet carb, Flowtech headers, 2.25 40 series HEI, Curve kit, TH 350, 3.07 gears 275/60/15s on 15x8 rallies |
02-01-2007, 11:30 PM | #11 |
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Re: using an electrical fuel pump
Not likely, could possibly be debris in the needle/seat assy. preventing complete fuel shut-off when the bowl is at the set level.
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Oscar '72 Shortbed Fleetside '95 Jimmy 4X4 '69 GMC Custom Camper |
02-01-2007, 11:58 PM | #12 | |
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Location: Sonoma, CA
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Re: using an electrical fuel pump
Well, I just found this opinion on the WeberCarbs.com site regarding fuel pumps; The Mr. Gasket pump is the same as a Facet pump.
Quote:
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Oscar '72 Shortbed Fleetside '95 Jimmy 4X4 '69 GMC Custom Camper |
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02-01-2007, 11:26 PM | #13 |
Sofa King. We, Todd, Ed.
Join Date: Oct 2006
Location: Spokane, Wa.
Posts: 631
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Re: using an electrical fuel pump
Mr. Gasket #12s is a universal 12v volt pump that puts out 4-7 psi @ 35 gallons per hour. It shouldnt (?) over power a Q-Jet at all & technically you shouldnt need a regulator. Its very rare but if you wire them up backwards and mount them backwards they can pump some really high pressures??
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