Today's low-octane unleaded gas mandates a compression ratio reduction for '60s supercars. The easiest way to lower compression is usually to swap on late-model heads; not only do their larger ...

You might have heard about high compression ratios, but what exactly are they, and what kind of effect do they have on an ...

Hot rodding is a game of avoiding mistakes and taking advantage of the lessons of others. If you work on your car, you've probably run into situations where you wish there was a better way. Often you ...

Heavy-duty pickups and long-haul trucks rely on torquey diesel engines that are more economical, reliable, durable, and have a more straightforward construction than a comparable unleaded gas engine.