Split Second Enricher

Modern ECUs operate in closed-loop mode over most of the load and RPM range. While in closed-loop, the ECU is very efficient at maintaining an air/fuel ratio of 14.7:1. When an aftermarket turbo or supercharger is fitted to an engine, it is desirable to run at a much richer fuel mixture when the engine is in boost. Efforts to add fuel in boost are quickly overridden by the fuel trim that occurs in closed-loop. The Enricher alters the target fuel mixture in boost so that the stock ECU targets a user-adjustable richer mixture.