Biodiesel

Sincc a barrel of oil doesn't go as far in a diesel car, a wholesale conversion to diesels is unlikely in America unless we suddenly figure out how to make diesel fuel from something other than petroleum. European refineries produce more diesel and less gasoline from each barrel of oil, but making that switch would essentially require building brand-new refineries. Don't hold your breath. One approach is to transform animal fat or vegetable oil, via a trans-esterification process, into what is...

Ford Mustang Gt Convertible

The highs Mellifluous V-8 muscle, an evergreen envy generator, the lows gt Structural quivers, headrests designed by MTV's Jackass crew. IN THE STRUGGLE to keep weight down, the sheetmetal on some cars today is just thick enough to hold stampings, and no thicker. Walk on the metallic roof membrane that stretches over a contemporary coupe, and you'll wind up with a top whose contours resemble the South Dakota Badlands. But when that same thin roof span is removed from the structural equation,...

Tech Dept

gt BORGWARNER'S NEW APPROACH TO VARIABLE VALVE TIMING IS CAM-TORQUE ACTUATED. Most modern variable valve-timing VVT systems use a cam phaser that rotates the position of each camshaft relative to the timing chain. Think of making a record turntable go faster or slower by spinning it with your hands. The cam phaser has two basic components an outer sprocket connected to the timing chain and an inner rotor connected to the camshaft that varies the valve tim ing by adjusting the rotation angle of...