TorqStorm is a company that shares your passion for pushing the envelope when it comes to maximizing the power of a supercharged engine.
That journey started with their bestselling TS75 blower.
Recognizing that many enthusiasts wanted even more power, the TS84 model was developed in an effort to up the ante.
That is when it was recognized that the TS84’s compressor wheel was too efficient to be mated with the current scroll (some refer to this part as the housing or cover). It was not able to support the TS84’s airflow. The company’s in-house supercharger dyno was measuring a copious amount of cfm. With quantifiable data, the team returned to the drawing board. A new scroll was designed that allowed the TS84 to perform as intended.

The TS84 quickly became a resounding success. In typical hot-rodding fashion, it was not long before the question was raised, “How would a TS75 respond to the new scroll designed for the TS84?” The answer is… excellent!
Thinking like air
Unlike the flow of water, air cannot be seen. The quest for efficiency is a balancing act of trial and error while harmonizing with the air’s pathway.
The GEN2 compressor cover was completely redesigned, changing the shape and radii of its internal passages and the exterior.
Air moving through a supercharger faces obstacles that can result in heat and flow loss.
Flow loss is defined as the air volume the compressor wheel can move, measured in cfm, versus the discharge volume. The ideal cover would have minimal frictional flow loss, and the discharge air volume would be very close to that moved by the compressor wheel.

When a flow restriction occurs in a supercharger, the volume of air getting to the engine is diminished, and its temperature increases. The air is not being moved, and the compressor wheel works against it, raising the temperature.
For every 10 degrees F that the air temperature is altered, engine power is impacted by one percent. Heating the air diminishes power, cooling increases it.
A boost gauge reads the pressure at the intake manifold.
During the development of a supercharger, the outlet pressure is charted against what the engine will potentially experience.
While keeping all test criteria constant, increasing supercharger compressor cover efficiency will result in three things: a decrease in air temperature, increased air volume to the engine, and higher boost levels at the same engine speed.
Seeing is believing
A 2022 Dodge Challenger Scat Pack was employed as a test mule. The engine was stock, except for a TS75 and a Frozen Boost water-to-air intercooler.
With the standard TS75 cover and a 3.50-inch pulley at 6,300 rpm, the engine experienced 3.5 psi of manifold boost pressure. With a 3.25-inch pulley at the same engine speed, the boost was 6.0 psi. The intake air temperature on an 80-degree day peaked at around 140 degrees F.
With the GEN2 cover and the 3.50-inch pulley installed, the boost was now at 8 psi! With the 3.25-inch pulley, it increased to 10 psi! Both readings were at the same test rpm of 6,300. The air temperature was now only 7 to 10 degrees F above ambient, with a peak of 105 degrees F.
It is important to note that though the gains experienced with the test mule were indeed valid, yours may vary slightly or even be better.
The GEN2 cover retails for $450.00. Upgrading a TS75 is simple, requires only a few hand tools, and can be accomplished in less than one hour. Newfound horsepower was never easier or as inexpensive!

