Dynamometer tests are used to measure a car's torque and rpm response. But how do they get that information? And how reliable ...

A very good friend of mine, noted engine guru, and PHR contributor David Vizard, was once being queried about some aspect of engine theory. The interesting part of the exchange was when the fellow ...

Testing carburetors on an engine dyno can sometimes be misleading. We've all seen tests showing large-cfm carburetors making more power—even on a small engine that nobody in their right mind would run ...

There can be little argument that the emergence of the chassis dyno has been a godsend for the serious power enthusiast. The rollers allow us to quantify, without marketing hype clouding the picture, ...