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Mustang Fuel Pump - Three-Play
Lethal Performance And Friends Bring Three Pumps And 1,000hp Capability To The S197
Horse Sense: Companies that cater to the same clientele are often bitter rivals, but Lethal Performance and VMP Tuning have forged a unique alliance where Justin Starkey at VMP provides tuning support for Lethal owner Jared Rosen's GT500 project car. You can follow the progress of the project at www.lethalgt500.com. Currently the car features a BMR Fabrication front suspension, a Steeda rear suspension and shifter, a DSS 3.5-inch aluminum driveshaft, a Gen II 3.4-liter Whipple supercharger, an AFCO dual-pass pro-series heat exchanger, a JLT carbon-fiber cold-air intake, and True Forged wheels.
Like many other technical progressions in Mustang history-fuel injection in 1986, mass air in 1988-1989, and modular engines in 1996-there is always a learning curve. At first it's tougher to make more power than the factory intended, but soon the creative and dedicated minds in the aftermarket come up with solutions that allow our wildest dreams to come true.
In the case of returnless fuel-injection systems, which joined the Mustang world in 1999, tuners soon ran to the limit of the system. The first solution was to revert to a return-style system, just like the first solution for hot-rodding EFI Mustangs was to put on a carburetor.
Naturally, many have devised ways of installing larger pumps in the factory pump assembly, replacing GT pump assemblies with GT500 versions, and even revving up the voltage in the stock or larger pumps to feed the power today's Mustangs are capable of creating. Of course, those capabilities keep increasing, and rather than standing by until the current solutions max out, another group of dedicated speed freaks has come up with the pieces to push the returnless fuel system toward 1,000hp capability.
At the center of this group is the affable, kinetic Jared Rosen, main man at Lethal Performance. No doubt inspired by the flow of Red Bull into his system (Jared drinks the stuff like water), he worked with two companies--Fore Precision and Zone-5--to put together the pieces necessary to create a complete, triple-pump fuel system for returnless-fueled S197s. Jared explains that Fore Precision's customers actually asked for a three-pump fuel hat, so he was just responding to demand.
We joined Jared at VMP Tuning, where he and VMP main man Justin Starkey installed the prototype system on Jared's GT500 project car. The initial results show a lot of promise, and we can't wait until people begin pushing the limits of this system.
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Since we were testing the prototype system, Jared wired the MDM using standard crimp connectors. For a permanent installation, we recommend creating a proper harness by measuring precise wire lengths, soldering the connections, and covering them with heat-shrink wrap. With the stock fuel pumps and 60-lb/hr injectors, Jared saw the injector duty cycle skyrocket to 93 percent at 6,000 rpm. After installing the new triple-pump arrangement, the duty cycle fell to a far more comfortable 72.5 percent. At the time of the testing, Jared's car made 726 rwhp, so it was a good testbed. With larger injectors, Jared believes the system will support 1,000 or more rwhp.