Description
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! This ECU Upgrade is coming soon.
How the direct injection system works:
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 250 bar, depending on factory
parts, with the HPFP. Finally, high pressure fuel is delivered to the injectors, which spray directly into
the cylinders.
The problem:
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.
The APR solution:
We dramatically increase the volume of fuel the HPFP can displace at every RPM by increasing the
displacement of the HPFP by 37%. 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!
Why APR
High quality components and extreme tolerances:
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.
Internal testing:
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.
Proven track record:
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
Product Details:
- Dramatically increases the volume of fuel displaced by the HPFP by 37%
- +37 AWHP / +50 AWFTLS (B9 2.9T E85 Stage 1 vs 1+ with HPFP) (Coming Soon)
- Maintains higher pressures under demanding situations
- Ideal for high output race cars and track use
- Fully rebuilt in house
- Fully machine tested and broken in before shipping
- Includes a new OEM pump (MS100207) (Coming Soon)
- Rebuild of your existing pump (MS100211)Upgraded and weight matched spring
- Titanium retainer
- DLC coated piston
- Heat-treated bearing-grade stainless steel material
- .00004" dimensional tolerances
- .00005" geometrical tolerances
- This part is legal for sale or use on Racing Use Only Vehicles
- Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
- 2.9T EA839 V6
- Audi RS5 2018+
- Audi RS5 Sportback2019+
- Audi S6 2020+
- Audi S7 2020+
- Porsche Panamera 2017+
- Porsche Cayenne 2019+
- Porsche Macan 2020+
- 3.0T EA839 V6
- Audi A6 allroad 2020+
- Audi A6 Quattro 2019+
- Audi A7 Quattro 2019+
- Audi A8 Quattro 2019+
- Audi Q7 2020+
- Audi Q8 2019+
- Audi S4 2018+
- Audi S5 2018+
- Audi S5 Sportback 2018+
- Audi SQ5 2018+
- Bentley Bentayga 2020+
- Porsche Cayenne 2019+
- Porsche Macan 2019+
- Porsche Panamera 2017+
