The tank has two -8AN fittings. Peering through the filler opening, the return line drops below the fuel level and is baffled to prevent aeration of the recirculated fuel. The second tank fitting is a vent with an internal roll-over protection valve. You can also see the A1000 pump with the large fluted fuel pickup.
The electronics that control the brushless motor pumps not only operate the pump’s basic functions, they also can advance the timing of the motor’s current to react to increased demands, while a standard brushed motor would fall off in pressure.
With all pump, return, and vent fittings routed directly out of the top of the Aeromotive tank, it eliminates the fittings related to the tank sump, external fuel pump, and filters. If you have ever been shut off in the money rounds of racing due to a slight fuel leak (as I have), you can appreciate this simplification.
“If you review the flow charts on most of our brushless pumps, the pump’s pressure doesn’t fall off against downstream pressure demands like a traditional brushed motor,” Stacy explained. “We program the controller to maintain a set RPM by advancing the electrical current timing only when needed.”
The familiar “workhorse”pump produced by Aeromotive is the A1000 series pump. To illustrate the technology jumps offered by Aeromotive, the A1000 is also offered as the Eliminator model, a 3.5 gear pump, and the 5.0 gear pump. These varied pumps can provide higher and higher pump capacities for anywhere from 1,000- to 3,600-horsepower levels.
Our specific pump could be considered the ultimate brushless pump to handle our E85 fuel big-block bracket racing application. The brushless A1000 has a rated flow capacity of 900-lbs./hr. at 9 psi for carbureted/racing gas engines and 700-lb/hr at 45 psi for electronic fuel injection systems. That equates to supply enough fuel to handle 1,300-flywheel horsepower (FWHP) with a normally-aspirated engine running straight gasoline.
The Aeromotive literature explains factoring in a reduction of 30-percent in horsepower rating when using E85 fuel. This calculates to our new pump capability rated at 910 FWHP — a perfect setup for our engine and demands.
With the same general appearance on the outside as the A1000 and Eliminator pumps, the new brushless motor gear pump models use an internal spur-gear pump mechanism that can deliver higher pressures with minimum flow drop. In racing gas applications, they offer flow rates ranging from 2,400- to 3,600-horsepower, depending on the pump model and the carburetor or EFI system it supplies.