Written by Moore Good Ink
Oakwood Village, Ohio: Clearly, serendipity was at work. In its attempt to take advantage of economies of scale by using common end caps and port sizes across its range of flow-through pumps, Weldon realized to their surprise that its existing 600-A pump became more efficient.
Weldon upgraded the 600-A with -10 inlet and outlet ports and fitted it with revised end caps. Its bigger ports allow the pump to draw more fuel, to deliver more fuel, and to do this at reduced amperage draw. The 600-A was previously equipped with a -8 inlet port and a -6 outlet port and the end caps were gold. The new A600-A is distinguished by its black-colored end caps.
This continuous-duty pump, the standard in quietness, is designed for street rod enthusiasts, street/strip proponents, road racers, off-road racers—in fact, anyone with up to 600 to 700 horsepower (fuel injected) or 800 horsepower (carbureted). NHRA champion and distinguished engine builder Jeff Taylor has two customers already running them in NHRA Stock Eliminator. Further, the A600-A is the mainstay of Hilborn’s electronic fuel injection market.
With carbureted applications, the A600-A should be used in conjunction with a bypassing regulator such as Weldon’s A15 or A30 as well as a blocking regulator (Weldon A2046). Weldon heartily recommends the installation of two fuel filters: a 100-micron filter before the pump and a 10-micron filter after the pump.
Because of Weldon’s distinguished aerospace background, every fuel pump 
receives its own serial number and a corresponding flow chart. All Weldon pumps are tested with actual fuel, not testing substitutes. In fact, they take their procedures even further, testing their pumps, if necessary, to accommodate specific customer requests. Whether running 89 or 93 octane or Sunoco GTX 260 NASCAR-spec racing fuel, Weldon certifies that its pumps will meet the task assigned. As supplied with each pump, the test chart for the A600-A reveals minimal amperage draw. Fewer than 5 amps generate 42 PSI (most common setting for EFI cars) and deliver more than 75+GPH.
The internals of the A600-A pump are contained within Weldon’s familiar Type 304 stainless steel housing with end caps made of 6061 billet aluminum. The fuel-cooled continuous-duty motor drives the pump element via spline engagement. The pump element is located at the inlet end and is sandwiched between top and bottom 0-ringed housings made of 6061 hard-coated anodized billet aluminum. The pump element (ring, blades and rotor) are steel and are precision-lapped like all moving components within the pump.
For further information contact:
Weldon Racing Pumps
440-232-2282
or visit: www.weldonracing.com
640 Golden Oak Parkway,
Oakwood Village, Ohio 44146
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