Harrop Engineering has a rich heritage in Automotive and Industrial sectors and is celebrating its 65th Anniversary in 2020. Harrop has a legendary reputation for proprietary innovative design and precision manufacturing, supporting programs for iconic motorsport teams, Automotive OEM, as w...

Harrop Engineering is in its 65th year of Automotive Engineering design, development and manufacturing.  For 15 of those years we have developed many supercharger systems for both OEM and Aftermarket customers. We supplied the world’s first Eaton TVS technology supercharger to Toyota Australia, a...

With the ever-increasing variety of supercharger size, drive ratios, belt routing, belt material and pressure ratios we will be taking a look into the design and choice of drive systems, pulleys and belt selection....

A question we are often asked is what is the difference between a roller dyno and a hub dyno, second to that what is the difference between engine power and rear wheel, or hub power.  In order to answer these questions, we need to understand some basic principles that are the root cause of the diff...