Saab's APC cleverly solved the knock that plagued turbo engines in the '80s overnight, allowing for higher compression and ...

For Subaru WRX and STI enthusiasts, deciding between an internal and external wastegate can be a big step in shaping performance. External wastegates offer more precise boost control, better heat ...

When Project Black Beauty last left the dyno, its ProCharger F-1C–supercharged 4.6-liter two-valve had just laid down 612 rear-wheel horsepower on E85. For a street-driven 2002 Mustang GT, that number ...