The Garage
   

Brake Pad Replacement (front)

Clear side repeaters

Fog lamp mod

FX Bodykit install

Moonroof Install

Oxygen sensor replacement

Passing Flash

Passing Flash - Version 2

VRIS

 

Variable Resonance Induction System (VRIS)

Three solenoid operated shutter valves are installed in the dynamic chamber of the Variable Resonance Induction System (VRIS). The VRIS opens and closes the shutter valves according to the engine speed and throttle opening angle to improve the charging efficiency by utilizing the pressure waves of the intake air. The Powertrain Control Module (PCM) applies voltage to the VRIS solenoids 1 and 2, and the solenoids apply vacuum to the shutter valve actuators which move the shutter valves. There are two vacuum chambers located under the front (LH) bank of the intake manifold. These vacuum chambers maintain a constant vacuum to the VRIS shutter valves during wide open throttle operation and other low-vacuum, low-speed situations.

 

Variable Resonance Induction System (VRIS)

 

Item Description
1 Shutter Valve (No.1)
2 Shutter Valve (No.2)
3 Shutter Valve (No.1)
4 Throttle Valve
5 Shutter Valve (No.2)
6 Shutter Valve Actuator (No.1)
7 Shutter Valve Actuator (No.2)
8 Vacuum Chambers

 

Variable Resonance Induction System (VRIS) Shutter Valve Operation

Engine Speed (rpm) 0-3,250 3,250-4,250 4,250-6,250 6,250-7,500
Shutter valve No. 1 Closed Open Open Closed
Shutter valve No. 2 Closed Closed Open Closed

NB: Any adjustments or modifications carried out on your motor vehicle are done so at your own risk and neither the owner of this website nor anyone associated with it accepts any responsibility or shall be held liable for any possible damage resulting either directly or indirectly from such modifications and/or adjustments.