THE BEECHMONT CREST AUTOMOTIVE LEARNING ZONE
VARIABLE INDUCTION SYSTEM
A variable induction system allows a car’s engine to generate more power with greater efficiency. The variable induction system is an intake manifold configuration that includes two sets of runners.
Airflow to these runners is regulated by butterfly valves and the car’s computer. One set of runners is longer than the other. At low engine speeds, air is forced through the longer intake runners to increase torque.
Then, once the engine reaches a preset threshold speed, the car’s computer opens the butterfly valves that cover the shorter set of intake runners. When these shorter runners are opened, airflow is increased at higher engine rpm’s.