Well like most, I had heard the pros and cons of each style, some myths and some real. The biggest change one would expect would be a gain of upper end breathing (more HP) at the expense of lower end ...

If you were to fill a room with the top engine builders in the world, you’d be surprised to hear the various opinions on what part of the engine needs the most focus. Is compression the Holy Grail? Or ...

For Part I, covering the new combustion system, direct injection, and active fuel management: click here. For Part III, covering the block, crankshaft and lubrication systems: click here. Continuing ...