No matter how much we love them, our engines are still basically inefficient air pumps and need all the help they can get to make power. Like any other type of pump, if it leaks, it won't work. And ...

Learn how a small engine’s gear and piston system operates together, explained through clear visuals and real mechanical ...

From the archives: Using a stash of parts and an old set of AFR 227 heads, see how this small-block combo got every last bit of power. To celebrate HOT ROD's 75th anniversary, we teamed up with ...

Dimpled pistons might sound strange, but some say they could be the future for diesel power. We've looked at the arguments ...

Pistons are an engine-building element we like to brag about, but you won't catch many of us boasting about having cast pistons. Cast pistons are for wimps. Many of us like to talk up hypereutectic ...

Sleeving is more expensive than boring an engine block, but especially for aluminum blocks, sleeves may be better able to ...