Tech Articles

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 […]

In the first installment of our ’68 Mustang project build, we detailed the pre-install prep on our 408 cubic-inch Windsor from BluePrint Engines that would replace the original 289. Now […]

Not long ago, few people had ever heard of an air shifter. Today, at every drag strip in the world, they’re about as common as a radial slick. Wherever they’re […]

  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 […]

I’m looking to buy some upgraded brake pads for my 2010 Chevy 1500 pickup as the brake pedal is starting to shudder on even light brake application. I’ve been reading […]

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 […]

I am building a 355 cubic inch small-block Chevy with AFR 1065 220cc Race Ready AFR heads, an Erson roller cam, and FiTech fuel injection. Can I use a wet […]

Variable Valve Timing (VVT) is a system that automatically adjusts valve timing. GM used VVT on the following engines within the LS family. (Summit Racing’s Paul Spurlock and Brian Nutter contributed […]

Active Fuel Management (AFM) is a trademarked General Motors technology that improves gas mileage by shutting down half of the cylinders under light-load conditions to reduce fuel consumption. It is […]

Turbochargers are becoming a go-to power adder, and not just for imports. Chevy and Ford currently have turbocharged engines in their lineup, and even the new Jeep Wrangler is expected […]