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Weldon Fuel Pump - Let It Flow
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10 Things Not To Do With An Efi Fuel System
We talked to Weldon Pump and got the lowdown on some of the more common mistakes builders make. Read it, learn it, and take advantage of the following tips:
1. Inadequate fuel tank (minimum 5 gallons for drag, 15 gallons for street/strip)
2. Improper fuel tank vent (or lack thereof)
3. Incorrectly sized feed and supply fuel lines
4. Excessive use of 90-degree fittings (cast-type or sharp-machined) on inlet or outlet of fuel pump
5. Too small a fuel filter (micron rating and dimensional size) on the inlet or outlet of fuel pump
6. Improper electrical grounds and connections-lack of an electrical relay to power the fuel pump
7. Bypass regulator in wrong location (or plumbed incorrectly)
8. Restrictive bypass (return) line
9. Incorrectly sized fuel injectors
10. Incorrectly sized fuel pump (bigger not always better)  The rated horsepower a fuel...  The rated horsepower a fuel pump can feed changes at different voltage levels on all electric fuel pumps. This well-engineered Weldon fuel pump is rated to supply fuel to an 850hp engine at 12 volts, 1,000hp at 14 volts, and 1,140hp at 16.5 volts.  The steel tub houses the plastic...  The steel tub houses the plastic Jaz fuel cell and protects the tank from debris and heat.  In the event of a high-speed...  In the event of a high-speed impact, this inertia switch is designed to interrupt the current flow to the fuel pump(s). This Camaro's owner installed this switch above the fuel cell in the trunk. These may be purchased from some wrecking yards and are typically found in the trunk areas of late-model Crown Victorias.  The return line should generally...  The return line should generally be no smaller than the feed line.  Inside this tank on the left...  Inside this tank on the left side, the owner has placed two electric fuel pumps and corresponding check valves. Each feed line to the fuel pump is filtered through a low-restriction fuel sock. The pick-up points are mounted at opposite ends of the tank with each check valve being designed to close when fuel sloshes away from the pick-up.  BG Fuel Systems offers these...  BG Fuel Systems offers these two high-performance, continuous-duty electric fuel pumps designed for electronic fuel-injection engines. The Mighty Sumo (up to 750 hp) and the King Sumo (up to 2,000 hp) feature a continuous-duty motor, a built-in cleanable pleated stainless steel fuel filter with a unique dry-break arrangement, which prevents fuel from leaking while inspecting or servicing the filter. A BG bypass regulator (PN 171023) controls fuel pressure in excess of 70 psi, and the bypass includes two AN-6 inlet ports, an AN-10 outlet, two ports to mount fuel pressure gauges, and as a boost-referencing port.  This illustrates a well-designed...  This illustrates a well-designed EFI fuel delivery system. Note the placement of the coarse 40-micron filter before the fuel pump and the 10-micron after the fuel pump. The Y-block helps to promote flow and the bypass regulator is positioned after the fuel rails and is fitted to a return line back to the tank.  Aeromotive's A1000 (PN 11101)...  Aeromotive's A1000 (PN 11101) electric fuel pump is rated to feed up to 1,100 hp on naturally aspirated fuel injected engines and up to 800 hp on fuel-injected engines with forced induction. When matched to the correct bypass regulator, tank, lines, wiring, and fittings, you'll never have to think twice about fuel starvation.
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Aeromotive Inc.
7805 Barton St.
Lenexa
KS
66214
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Holley Performance
Bowling Green
KY
2-70/-781-9741
www.holley.com
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MSD Ignition
El Paso
TX
9-15/-857-5200
msdignition.com
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Mr. Gasket Company (Mallory)
Cleveland
OH
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Barry Grant Inc.
1450 McDonald Road,
Dept. MMFF
Dahlonega
GA
30533
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Weldon Pump Performance Products
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Edelbrock
Dept. 5.0
2700 California St.
Torrance
CA
90503
310-781-2222
www.edelbrock.com
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Flash It
The purpose of this article is to provide some initial exposure to OBD-II tuning and the...
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Toilet Training
Despite the overwhelming influx of EFI, the carburetor (sometimes referred to as the "toilet")...
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