What is the purpose of a throttle body spacer?
Throttle body spacers are aftermarket devices that purport to increase horsepower in a variety of ways. The efficacy of this modification depends largely on the engine it is applied to and the engine’s factory shortcomings.PlacementTB Spacers are designed to be placed between the throttle body (the large butterfly valve that controls airflow into an engine) and the intake plenum onto which it is bolted.MarketingAccording to manufacturers, TB Spacers make power through better fuel atomization, which is accomplished by creating a “tornado-like” swirl in the intake manifold.The Tornado EffectAir-swirl effects tend to benefit engines with throttle-body injection more than those with multiport injection, since multiport systems use a dry intake manifold that does not contain any fuel droplets to atomize.Plenum EffectsThrottle Body spacers make the majority of their power by increasing the volume of space between the throttle body and intake runners. This gives the engine more unhindered air
