Adding 140 Horses With a Lysholm Twin Screw Supercharger

January 31st, 2011

Text and Photos by Jason Mulligan

The basic function of a supercharger is to add power and torque by increasing the aiflow into the engine and providing more oxygen for combustion, this allows for added power and the ability to retune the computer a bit to push the speed envelope even farther. A supercharger kit is one of the most efficient, emissions-compliant and reliable ways to add a massive amount of power. We headed up to Oxnard, California, to a 60,000-sq-ft facility where a brand-new Lysholm 2300 twin screw supercharger was installed on an ‘08 GMC Sierra 1500 with the 5.3L engine. Stock, the truck was dyno’d at 235 horses and ft-lbs of torque. After the simple installation of the supercharger and retune of the computer for fuel and air management using the provided handheld tuner, the truck now puts down close to 380 horses and 375 ft-lbs of torque.

The Lysholm brand is part of the AirPower Group consisting of Vortech Engineering, Vortron, and Paxton Superchargers. Lysholm has a long history in the supercharger realm. While Lysholm Technologies was founded in 1995, the name bears the history of the industry with the twin screw supercharger being invented for cars by Alf Lysholm in the 1930s. He was then the chief engineer at Svenska Rotor Maskiner AB. The twin screw system is lightweight and compact and provides increased efficiency. Along with Roots-based systems, the twin screw system is a positive-displacement supercharger. Unlike the Roots system, however, the twin screw system is not just an air blower but a true air compressor that will build boost pressure internally. The twin screw system is also more efficient and will run cooler than Roots based blowers.

One of the benefits of a positive-displacement system over other setups is a maximum hit of low-end torque in addition to the added horsepower. This makes for a great “seat of the pants” experience, which, let’s face it, is what we care about on daily driven trucks. The low-end torque increase also assists when towing a heavy load. Reliability when adding power can also be a concern. A supercharger is one of the most reliable methods of increasing horsepower. To back this up, Lysholm offers a three-year/36,000-mile limited warranty on its systems. The installation kit provided by Lysholm includes everything needed to complete the install with basic hand tools in roughly a day.


Lysholm Technologies/Vortech

AirPower Group


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