BMW is using an old-school trick to improve the performance of one of its newest cars. The twin-turbocharged six-cylinder that powers the M4 coupes it employs as a safety cars for the Moto GP ...

Shown here is Spearco's Injectronic system. All necessary hardware is provided, along with various restrictor orifices and plug-in resistors for the electronics module, to permit fine-tuning the unit ...

When it comes to pump-gas performance, the name of the game is usually compromise. Unfortunately for turbo LS (or other) enthusiasts, real street (and some track) cars walk that fine line between ...

So what do you do when you've built your motor, strapped on the biggest turbo you can tolerate and basically tuned your forced-induction car to the teeth-but you still want more power? More boost ...