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 ...

For example, testing demonstrated a clear 175-rpm torque peak shift for each 25mm change in intake runner length. With a stock baseline runner length of 275 mm, engineers went to both extremes of the ...

The question of which is better, carburetion or fuel injection, really comes down to cost versus performance. Overall, more torque can usually be produced by a longer ...