Science Fair Project Encyclopedia
Variable Length Intake Manifold
Variable Length Intake Manifold (VLIM) is an automobile engine manifold 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).
- Audi - 2.0 L I4, V6, V8
- BMW DIVA
- Ferrari - 360 Modena, 550 Maranello
- Ford DSI (Dual-Stage Intake) - 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.
- Honda - Integra, Legend, NSX
- Hyundai - XG V6
- Jaguar - AJ-V6
- Mazda VICS (Variable Intake Control System) is used in the Mazda B engine family of straight-4 and Mazda K engine family of V6 engines. An updated version of this technology is employed on the new Mazda Z engine.
- Mitsubishi Cyclone is used on the 2.0L I4 4G63 engine family.
- Nissan V6 and V8
- Opel 3.2 L V6
- Peugeot 2.2 L I4, 3.0 L V6
- Porsche VarioRam - 964, 993, 996, Boxster
- Renault - Clio 2.0RS
- Toyota T-VIS - (Toyota Variable Intake System) used on the 4A-GE family, notably in the MR2
- Volkswagen - 1.6 L I4, VR6, W8
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