Editor's Note: As inanimate as intake manifolds may appear, they provide a path to both major and minor on-track power gains. Selection is one thing; "tuning" them to specific applications is a blend ...

OBJECTIVE: Wet flow, pressure excursions, port volume, runner length, plenum volume—all these figure into an engine's overall efficiency. But there's more… Sometimes theory is neat, but sometimes it ...

Q:I have a 1996 Corvette that gave me a recurring fault code (P0171 - "System Too Lean, Bank One") for more than a year. The code reader on my scanner indicated that the fuel pump was defective, so I ...