The typical returnless system uses a fuel rail pressure sensor, along with other typical engine sensors, to work with the ECM and a fuel pump controlled by a fuel pump driver module.

The folks at Holley's facility in Bowing Green, Kentucky showed us how easy it was to install their new in-tank OEM-style fuel tank module in a 1970 Camaro. The car already had a traditional in ...

The fuel pump module, which is controlled by an ECU, will inject a metered amount of air and fuel mixture into the engine for effective combustion.

According to MacDonald, the limits of the factory fuel pump with the additional voltage tuning is somewhere in the 525 to 575-rwhp range.