Building a marine engine is both similar and different from building a traditional automotive performance engine.

No matter what the medium, big cubes and a Whipple are going to make great power.

We cover all sorts of engines, but this might be the largest one yet.

With over 400,000 cubes and 25,000 horsepower, this diesel is is a giant.

Mercury Racing is about six months away from releasing a unique DOHC, 32-valve cylinder head for the LS engine.

The design is similar to the company's powerful 9-liter QC4 crate engine. Check it out inside!

Mercury Marine's new MerCruiser 4.5L V6 engine is designed to provide smooth operation and solid performance, with V8 levels of power from a V6-sized package. It's an all-new engine from the ground up.

Goodwin Competition is expanding the market for its 5-inch-bore-space, all-billet design by adapting the V8 to the marine market. Check out the details on this 650ci bullet that can deliver 1,700 horsepower all day.

Over 1,800 horsepower at 6,900 rpm and pump fuel in the tank. Steve Morris built a bad-to-the-bone supercharged big-block Chevy for powerboat racing - and the boat gets TWO of these. Check it out!

We want to hear from engine shops all across the country. Here's a quick report from R&R Performance in Minnesota when Ron Quarnstrom has dyno'd more than 7,800 engines. He shows a trio of supercharged powerplan