For important details regarding Covid-19

Status Update

April 20, 2020

The leadership team at Power Test realizes that we are facing a very unique situation with the COVID-19 virus. We want to reiterate that our focus is on our loyal Customers, our dedicated employees, and our communities at large.

The experts have painted a sobering picture for Wisconsin. We are sure this is true for where ever you are located and reading this. We have about 6 million residents in the state. It was determined that 5% of our state population will be affected, resulting in about 300,000 people needing special care. Of those, 20% will require hospitalization. That is 60,000 people vying for fewer than 4,000 ICU and critical care beds in the entire state. Power Test is committed to “flattening the curve”.

Here is what we are doing to support our Customers, Employees and Communities:

  • We moved about 90% of our Office, Sales and Service staff to remote working situations
  • The company has been divided into two separate groups to ensure business continuity
  • These two group are working out of 3 self-contained areas and are divided by a 30-minute break between shifts to clean and sanitize our work spaces.
  • Financially, we have a company record backlog that we will continue to work on through August of this year. Leadtimes will continue to come down, quality will be a focus and capacity will open, especially for the 3rd and 4th quarters

Power Test has been through three major economic dips in the last 19 years and keeps coming out stronger because we developed and executed our strategic and tactical plans. This situation will be no different. We thank you for choosing the Power Test family of brands: Super Flow, Pivotal Pumps, AIDCO, Stuska, Axiline, Hicklin, and TCRS. Please contact your Sales or Service representative if you have any questions or concerns.


Rick Ruzga

Our History

Award winning manufacturer of dynamometer products and related equipment since 1976.


In 1976, John Petelinsek set out to improve upon the traditional water brake dynamometer. The result was an affordable and durable dynamometer with increased absorption characteristics through a simpler, deeper pocket design. Power Test, Inc. was founded, and John spent the next 25 years focused on building his company and providing the diesel engine market with a durable and reliable product with the best customer service in the dyno manufacturing industry. In 2003, Alan Petelinsek purchased the business from his father and continued to build upon Power Test’s earlier success.

Throughout the years, Power Test has grown its product line through the design, manufacture, and development of a variety of engine and chassis dynamometers, engine and vehicle controls, and the latest technology in data acquisition systems.

In addition to growing its product line, Power Test has grown through acquisitions. Power Test has made two acquisitions in the performance engine testing market (Stuska Dynamometers in 2002 and SuperFlow in 2017) and purchased the transmission and hydraulic testing equipment division of AIDCO International in 2006.

In 2008, Power Test moved from Menomonee Falls to the current location in Sussex, WI. In 2012 and 2018, the building was expanded to accommodate the increase in employees as the business continued to grow.

A strong commitment to the growth of the business and technical excellence has enabled Power Test to be a globally prominent, one-source provider for testing power train components and vehicles.


Power Test was founded


Power Test relocates to Menomonee Falls


Acquired AIDCO transmission testing products


Power Test Acquired Stuska Dynamometer


Power Test relocates to Sussex, WI


Moved from Menomonee Falls to Sussex, WI


Acquired SuperFlow


50,000 sq.ft. building addition


Pivotal Pumps begins operating as a Power Test company