Description
Fits: 2012-2013 Audi TT RS
Overview
The APR High Pressure Fuel Pump (HPFP) is engineered to boost fuel delivery volume by 30% over stock, meeting the demands of high-horsepower setups. By increasing the pump's displacement and utilizing high-quality components, this upgrade ensures consistent fueling under extreme conditions.
How the Direct Injection System Works
- Low Pressure Fuel Pump (LPFP): Delivers fuel from the tank to the HPFP at 4 to 6 bar.
- High Pressure Fuel Pump (HPFP): Increases pressure to a maximum of 145 bar, supplying fuel directly to the injectors.
The Problem
The HPFP's fuel displacement capacity is constrained by:
- Internal bore size
- Camshaft-driven stroke
- Engine speed
Even stock turbochargers can stress this system, especially in lower RPM ranges.
The APR Solution
APR's design significantly enhances fuel displacement across all RPMs by increasing the pump's bore diameter. This upgrade primarily focuses on volume rather than simply increasing fuel rail pressure, ensuring steady fuel availability even under high demand.
Key Features
- 30% Increased Fuel Volume: Enhances fuel flow to meet high-performance needs.
- Reliable Components: Uses genuine Hitachi parts made in Germany for optimal reliability.
- Precision Engineering: Dimensional tolerances as tight as .00004" and geometric tolerances at .00005".
- DLC Coated Piston: Provides exceptional surface hardness for durability.
- Fully Rebuilt and Tested: Each unit is assembled in-house and rigorously tested to ensure performance and reliability.
Technical Specifications
- Material: Heat-treated bearing-grade stainless steel.
- Internal Components: All seals replaced with OEM quality parts.
- Spring: Upgraded and weight-matched spring included for stability.
Emissions
This product complies with the EPA’s Tampering Policy and is legal for on-street use in all states, except California. Testing for 50-state compliance is ongoing.
Tech Resources
To maximize performance, specific software is available for various vehicles to complement the APR HPFP upgrade.
