This technique integrates a turbocharger earlier than the carburetor or throttle physique in an engine’s induction system. This placement forces the turbo to “draw” the air-fuel combination by it, somewhat than pushing pressurized air right into a downstream carburetor. A standard utility was present in older, performance-oriented automobiles in search of elevated energy output.
The benefit of such configurations lies of their relative simplicity concerning gas administration. As a result of the carburetor nonetheless meters gas based mostly on vacuum alerts, advanced digital gas injection programs are usually not initially required. Moreover, traditionally, this was a readily achievable technique to boost engine efficiency earlier than the widespread adoption of subtle digital engine controls. Nonetheless, the apply has drawbacks, together with doubtlessly uneven gas distribution and elevated threat of gas condensation throughout the turbocharger.