VLIM
Variable Length Intake Manifold (VLIM) is an automobile engine intake technology. As the name implies, VLIM can vary the length of the intake tract of an engine in order to optimize power and torque. A tuned intake can have a light pressurizing effect similar to a low-pressure supercharger. This is due to Helmholtz Resonance.
Many automobile manufacturers use similar technology with different names. Another common term for this technology is Variable Resonance Induction System) (VRIS).
- VICS (Variable Intake Control System) is used in the Mazda B family of straight-4 and K family of V6 engines. An updated version of this technology is employed on the new Z family of engines.
- Ford has implemented this technology with the name Dual-Stage Intake (DSI) on their Duratec 3.0 liter V6, 2.0 liter Zetec four, and it was also found on the Yamaha V6 in the Taurus SHO.
