To sleeve or to bore your engine block? That's the several-hundred-dollar question (maybe into the thousands) as you ...

Meet the Birotary, a crazy new and complicated engine that has three cylinders arranged like a star, a rotating block, a ...

Anyone with even the slightest shred of mechanical sympathy has to wince at videos like this one. Redditor Conyers117 recently posted a video of a diesel engine from an International DuraStar work ...

The mind-bending world of birotary engines - a hybrid of piston and rotary technology that could revolutionize aviation. But ...

This 427ci sleeper is a good reason why you don’t judge an engine by the size of its block. The art of deception plays a significant role in the hot rod world. Although most enthusiasts are ...

We're out for torque, and nothing serves it up like huge cubes and a big arm. Stroking delivers both. Common Chevy 383 and Ford 347 combos have brought strokers to the masses, but there can be more ...

It all started with a bench racing session between the author and John Beck of Vintage Hot Rod Design (VHRD). The subject centered on small-block Chevys and the fact that the Gen I versions were now ...

Blueprinting has become an abused term. For those who build their own engines—or at least want to know how to check clearances like valve-to-piston on an existing engine—we will offer some techniques ...

Free piston engines could achieve efficiencies of 50% which is almost double a regular gas combustion engine. However, new super efficient diesel engines could be even better, plus diesels would be ...