Here’s where the rubber meets the road. Vortech’s compressor stages are highly evolved, thoroughly tested designs, resulting from more than 15 years of experience and thousands of production supercharger units. A simple visual examination clearly shows the difference. All Vortech compressors incorporate sophisticated impeller designs, coupled to a vaneless diffuser, with a progressive scroll, or volute exit stage. Impellers employ advanced aerodynamic features such as optimized inducer blading, splitters, and in some cases, exit rake and backsweep… all depending on the particular pressure/flow objectives. Rather than a simple change of blower speed to effect different "models", each Vortech supercharger is optimized aerodynamically so that best performance is attained for a specific vehicle application.
In order to effectively take advantage of impeller work, flow must be efficiently diffused so that pressure rise can be generated with minimal losses. Unfortunately, a simple "cut-and-paste" won’t work. Instead, the diffuser is optimally matched to the impeller flow physics, with many iterations tested and verified until maximum efficiency is achieved with each supercharger design. Finally, a matched volute effectively collects and diffuses further, resulting in additional pressure rise. The result? Isentropic efficiencies as high as 80%! In fact, all Vortech compressors achieve at least 72% peak efficiency, with better than 65% efficiency achieved over a majority of design flow range (surge to choke).
Vortech componentry has garnered a reputation for its "best in class" execution. Blower casing components are cast from A356 aircraft-spec aluminum alloy treated to T-6 condition. Modern CNC production cells ensure that part tolerances are held into the "tenths" – to, and in many cases beyond aircraft tolerances.
The heart of any centrifugal supercharger is the impeller. Our piece is investment cast from an extremely strong but light-weight proprietary aluminum alloy (similar to that used in turbochargers). This special heat treated material is used because of its stability and enhanced properties at the high operating temperatures …which may reach 400°F under extreme conditions. At this temperature, the Vortech impeller is up to 36% stronger than even 7075, a common structural aluminum material used by others. The investment cast process secures close dimensional tolerance and excellent surface finish. Of course, 100% CNC machining ensures exact tolerances. And finally, multi-plane dynamic balancing to better than ISO G0.4 tolerances delivers smooth operation. The historical use of these same procedures in building aircraft turbomachinery components for the most demanding applications proves its durability.
Drive gears are manufactured from 8620 and 9310 carburized billet alloy steels. These premium grade materials possess exceptional strength and durability, with enhanced core toughness properties. The gear teeth are CNC precision ground. The internal step-up drive system is engineered to reliably support impeller speeds exceeding 70,000 rpm.
Vortech bearings are ultra-high precision (ABEC 7/ABEC 9) pieces that are made in the USA. Most are custom manufactured to our specifications. Aircraft quality is truly an understatement here, since these bearings experience speeds as much as twice that of a jet engine.
The maintenance-free lubrication system uses engine oil that is pre-filtered and injected directly onto the drive gears. We chose this configuration as opposed to a common "self-contained" set-up because engine oil provides faster warm-up, excellent reliability and superior cooling. The lubricating oil benefits from continuous filtration, being routinely changed along with the engine oil (instead of an additional maintenance action). This system also offers the best opportunity for thermally stable operation. Vortech firmly believes this is the best method to feed and care for superchargers.
Vortech Counter Clockwise V-4 J-Trim Supercharger:
- Max Speed: 58000 RPM
- Max Boost: 28 PSI
- Max Flow: 1600 CFM
- Max Power: 1100 HP
- Peak Efficiency: 74%
The supercharger of choice for marine applications.