What if we told you that you could add 50-plus ponies in just four hours?! With the new ProCharger Intercooled Centrifugal Supercharger for '07-09 Softail models ($5,195) it can be done and we have dyno proof!
There are a few ways to achieve substantial horsepower and torque gains, but without doing any major engine modifications, a power adder like this is the only way you're going to see big numbers from a stock 96ci engine. The ProCharger is a bolt-on kit that does not require any engine modifications. And with a product that won Performance Product of the Year in 2008 at the V-Twin Expo, we had to see if the system measured up.
Walt Sipp, V-twin product manager at ProCharger came to us with a '08 Rocker that was begging to get blown. We went to Huntington Beach Hogs and Choppers in Huntington Beach, California, to do the install. After putting the ProCharger on the dyno we almost soiled our trousers when we saw the numbers!
 1. Blown away! The Rocker...  1. Blown away! The Rocker boasts an extra 10psi of boost. That means an extra 53 hp and nearly 22 lb-ft torque! |  2. Here's what you get in...  2. Here's what you get in the kit: the supercharger assembly, which includes a complete air-to-air intercooler system, outer primary cover, air cleaner assembly, supercharger bracket, power take-off assembly (PTO), belt tensioner, surge/bypass valve, computer programming software, belts, hoses, and everything else needed for the installation. |  3. For this install, a Bassani...  3. For this install, a Bassani 2-into-1 Road Rage Exhaust system for Rocker models was used. This bike was also fitted with an AIM Corp Variable Pressure Clutch assembly (Starting at $245) because it is a simple bolt-in piece that increases the clamping force as the rpm increases. This part offers easy clutch pull, fits under the stock derby cover and allows the use of all stock components. A Zipper's Thundermax EFI unit with AutoTune ($899.95) was also used for this install and a two-bar map sensor ($175) was added. |
 4. After removing the outer...  4. After removing the outer primary cover and the stock air cleaner assembly in order to fit the ProCharger components, Walt propped up the tank, removed the fuel line, and then the stock fuel rail and stock injectors located on the throttle body. Shown is the new fuel rail and new injectors installed (not shown in pic #2), ready to be mounted to the throttle body. |  5. Provided in the kit is...  5. Provided in the kit is a coil relocation bracket for Rocker and Rocker C models to ensure proper clearance between the Procharger system and the coil. Ed installed the bracket, which rotated the coil 90 degrees clockwise. |  6. Back down to the primary,...  6. Back down to the primary, Ed removed the stock compensator bolt first and installed the PTO assembly, which bolted right onto the compensating sprocket. The PTO is driven by the crankshaft and transmits power to the PTO output shaft at a 2.3:1 ratio to the crankshaft via the 21mm Kevlar wet belt. You'll need the primary locking tool shown here to complete this step (arrow). Red thread locker was used on the new 9/16-12x4.5-inch bolt, which was tightened to factory spec. |