Compression: An automotive term used by everybody, forever. Let's get into some detail and maybe develop a better understanding. Pressure, and more pressure: It's a must-have to produce power within ...

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 ...

One of the problems with running the proverbial ultimate cylinder head test that we did a few years back (a.k.a. MM&FF's Ultimate Guide to Cylinder Heads), is that the performance world continues to ...

Compression in a diesel engine is essential for effective and efficient performance. And when compression is lacking, damage can result. That is why it’s imperative to know whether your engine’s ...

‘It’s a big difference’ — Collins questions whether the FIA test reflects real engine heat.