KPM 1500HP IN-TANK FUEL MODULE (JEEP TRACKHAWK, DURANGO SRT HELLCAT)

Direct Supply vs Other FUEL SUPPLY METHODS

Until now, the only fuel system solutions available have been to boost voltage to the fuel pumps, to replace the fuel module canister with a hanger manifold that houses one or multiple pumps or to modify the direct supply fuel system into an outdated return style fuel system.

All these methods have been stop-gap solutions with limitations:

• A fuel pump running higher boosted voltages than designed for has the downside of running hotter as well as reducing its service life. This adds extra load on your vehicle’s electrical/charging system. It also creates an environment of hot fuel, which diminishes your ability to optimize performance and creates higher fuel usage and less stable tuning.
• Hanger manifolds replace the fuel module in your fuel tank so that the extra room for multiple pumps can be used for increased fuel delivery.
  Unlike fuel modules, hanger manifolds have no canister, Venturi pump or refill valve systems to ensure the pumps are permanently surrounded by fuel. This means that you need to run a full fuel tank at all times to avoid any surge or fuel starvation during spirited driving, cornering or excessive acceleration as used in race or drag conditions.

• Modifying your OEM direct supply system to a return style system when retrofitting to larger pumps is a method of trying to keep your in-tank canister constantly full with return fuel to avoid surge and starvation. This was an accepted method in OEM vehicles up to 10-15 years ago. However, in doing so it required the fuel pressure regulator to be mounted externally—usually at the engine fuel rail. This requires double the amount of fuel lines, and as fuel demand increases so does fuel pump current draw.
  All this equates to creating an environment of returned hot fuel, which diminishes your ability to optimize performance, risks vaporization and creates higher fuel usage and less stable tuning.

Alternatively, a direct supply fuel system supplies cool, dense fuel from the tank that is not recirculated, making for a more efficient and modern high-performance fuel system.