TURBOCHARGING

Although usually associated with normally aspirated engines, throttle bodies can work well when applied to some forced induction powerplants. The throttle bodies will need to be enclosed in their own plenum (chamber) to hold boost pressure, but the same principles apply as if you were fitting throttle bodies to an engine free of a turbocharger. The only difference is that when adding throttle bodies to a turbocharged engine, instead of relying on the pressure difference between engine intake stroke vacuum and the surrounding air, the latter is boosted at greater pressure and is forced into the throttle body.