Engine Masters

Gasoline or E85 ethanol-blended fuel? David Freiburger and Steve Dulcich at Engine Masters wanted to find out which makes more power and by how much. So they grabbed a 489-cubic-inch, 13.5:1 compression […]

  Conventional wisdom says roller rockers increase horsepower by reducing valvetrain friction—with the biggest benefits showing up at high RPM. But Engine Masters’ David Freiburger and Steve Dulcich are always willing […]

The Motor Trend show Engine Masters is all about finding out what makes horsepower and what doesn’t. Hosts David Freiburger and Steve Dulcich have tested everything from headers and carburetors […]