The engineers at Callaway are typically under the hood of a V8-packing rear-drive coupe trying to add as much horsepower as possible, but now the specialty tuner is in the truck business as well. Callaway has launched a new truck modification kit for 5.3- and 6.2-liter-equipped Chevrolet Silverado 1500 pickups, adding superchargers to boost horsepower to up to 540 ponies.
Audi is using American supercharging muscle to give its new 3.0 liter TFSI V6 the desired wallop. Eaton Corporation has been enlisted by Ingolstadt to supply positive-displacement, Roots-type blowers that will work with direct injection to deliver 290 horsepower and fat, responsive torque down low on the tach. Roots blowers aren't anything new, but Eaton has refined the design with its latest Twin Vortices Series units. The TVS units add a fourth lobe to the rotors, and crank up the twist to 160
Automakers in the U.S. are just starting to truly embrace turbocharging, but Audi is going against that grain by choosing to supercharge its new 3.0L V6. We already told you some details about the new powerplant, and now we're hearing new specs from Autocar. The British website is reporting that the 3.0L V6 due to power the next S4 will be force-fed by an Eaton Supercharger to produce a power-output of 286 horsepower at 4,800 rpm and 310 lb-ft at 2,500 rpm. We'd heard earlier that the output of