The HPFP internals must be machined to extreme tolerances and installed in a clean environment or the pump can easily fail. Dimensional tolerances on the APR HPFP are as tight as .00004" and geometric tolerances are as tight as .00005". The plunger and barrel are created from certified and heat-treated bearing-grade stainless steel and the plunger undergoes a special diamond like coating process for exceptional surfaces hardness and ultra-reliable operation. To prevent float associated with altering the plunger's mass, APR supplies each unit with a properly specified spring. All necessary internal seals are replaced.
APR pioneered HPFP upgrades in the early days of VAG direct injection engines. Soon after, APR became an OEM supplier of HPFP and GDI components to VAG for use in various race cars, racing series, project cars, and concept vehicles. The APR HPFP has been at the center of countless motorsport victories across the globe and has operated with a nearly perfect tract record since the program's motorsport backed inception in 2006. With tens of thousands of pumps sold, APR has a wealth of knowledge, and manufacturing expertise necessary to deliver a product that will and has stood the test of time.
The APR High Pressure Fuel Pump (HPFP) increases maximum volume of fuel the HPFP can deliver by 37% over stock! In doing so, the direct injection fueling system is capable of satisfying fueling requirements set forth by high horsepower setups. This is accomplished by increasing the displacement of the pump using high quality components to exacting tolerances. On the B9 2.9T we achieved an additional 37 AWHP and 50 AWFTLBS over our Stage 1 (E85) ECU Upgrade by adding the pump and running our Stage 1+ (E85) ECU Upgrade!
We dramatically increase the volume of fuel the HPFP can displace at every RPM by increasing the displacement of the HPFP. This is accomplished by increasing the bore diameter of the pump's internal pressurizing cylinder. It's important to understand, despite the name, a HPFP upgrade is not necessary designed to increase the engine's fuel rail pressure. The primary goal is to increase the volume of fuel available, which will keep fuel pressure steady even in the most demanding of situations!
All APR HPFPs are assembled in house under strict assembly guidelines. Each pump is then tested on our test rig to ensure the pumps operate as designed. This step is important for several reasons. It's critical in determining if a pump has a failure from incorrect install, a leaking seal, or a bad solenoid. Secondly, a seized pump on the vehicle at startup can cause damage to the engine's camshaft. By testing each pump, we all but eliminate these possibility.
Please note, this is an upgrade of your existing pump and requires sending a pump to APR to be rebuilt. The pump and solenoids must be in working order. We will test the solenoids and visually inspect the pump. Failure to package the pump properly can easily result in damage to the pump's solenoid connectors. For proper operation, the ECU must be updated with compatible software. B9 RS5 Stage 1+ Software available.
The volume of fuel the HPFP pump can displace is directly tied to the displacement of the pump (Internal bore size, and camshaft dictated stroke), and engine speed. The pump is driven off of a lobe on the camshaft. Larger turbocharger systems, and ethanol usage are capable of taxing this system, especially in the mid to lower RPM range where fuel volume is lower.
A low pressure fuel pump (LPFP) in the fuel tank delivers fuel to the high pressure fuel pump (HPFP) at roughly 4 to 6 bar. Fuel pressure is then bumped up to a maximum of 200 bar, depending on factory parts, with the HPFP. Finally, high pressure fuel is delivered to the injectors, which spray directly into the cylinders.
Critical to the design of the APR HPFP is the use of only genuine Hitachi components, made in Germany, which consists of sensors, pump bodies, and other critical components that must operate with OEM levels of reliability. All APR components are made in the USA using medical grade precision machinery.
Fits Audi A6 19-24, A7 19-24, A8 20-24, Q7 19-24, Q8 19-24, RS5 18-24, S4 18-24, S5 18-24, S6 20-24, S7 20-24, SQ5 18-24; Bentley Bentayga 20-24, Flying Spur 22-24; Porsche Cayenne 19-23, Macan 19-24, Panamera 17-23
Pump rebuilds are applicable to the Hitachi Gen III pump found on the 2.9T and 3.0T EA839 V6.
APR 17-26 Audi/Bentley/Porsche EA839 2.9T/3.0T High Pressure Fuel Pump (Rebuild)
Dramatically increases the volume of fuel displaced by the HPFP by 37%
APR High Pressure Fuel Pump - 2.9T and 3.0T EA839 (Rebuild)
+37 AWHP / +50 AWFTLS (B9 2.9T E85 Stage 1 vs 1+ with HPFP)
Maintains higher pressures under demanding situations
Heat-treated bearing-grade stainless steel material
Fully machine tested and broken in before shipping
High quality components and extreme tolerances:
Ideal for high output race cars and track use
How the direct injection system works:
HIGH PRESSURE FUEL PUMP 29T30T REBUI
Upgraded and weight matched spring
.00004" dimensional tolerances
.00005" geometrical tolerances
Rebuild of your existing pump
Fully rebuilt in house
Proven track record:
The APR solution:
Internal testing:
Titanium retainer
DLC coated piston
OEM Components:
The problem:
Fuel Pump
