Installing Whipple's New 3.4L Supercharger - Extremely Aspirated

The plan is to add a substantial amount of boost and horsepower...

...so new 60-pound injectors will replace the stock 48-pound units.

The new injectors are taller, necessitating that spacers be used to fit the fuel rail properly.

Here, Silverman lowered the mighty Whipple 3.4L unit into place then bolted it down.

Shaun Lacko added a set of blue Ford Racing Performance Parts valve covers, and the stock throttle body was slipped into place. Down the road, we plan to test the Whipple monoblade throttle body, along with headers and a more aggressive "race" tune.

The JDM cold-air kit was installed.

We Attached the 3.5-inch blower drive pulley and the drivebelt, and with that we were ready to rock. In this trim, with 93 octane in the tank, the GT500 spit out an impressive 16 psi of boost, 642.57 hp at the wheels, and a maximum of 614 lb-ft of torque.

We Traded for the slightly smaller 3.375-inch upper pulley, which gave us an extra pound of boost; we also traded the 93 octane for 103. With a slightly more aggressive tune, Jim D'Amore fired up the beast and cut it loose to the tune of 708 hp at 6,000 rpm and 679 lb-ft of torque at 4,300 rpm.

With the Whipple installed, this GT500 is one serious player. If you consider that power at the flywheel is about 10 percent higher than at the rear wheels, this means the Shelby is making roughly 780 hp, and we haven't even put headers on it yet.

With a JDM tune and cold-air kit, the GT500 was good for 530 hp to the wheels. They make about 450-470 in bone-stock trim.

The Street tune makes well over 600 hp on 93 octane and loads of torque.

Can you say flat torque curve? We knew you could.