Audi 3.0 SC v6 EA837 Upgraded High Pressure Fuel Pump

The more power you make the more fuel you demand, that’s why Nostrum High Performance offers top of the line high pressure fuel pumps with larger diameter piston to increase fuel capacity. Featuring stainless steel laser welded construction and being tested in both function and flow, there are no possible leak paths in Nostrum high pressure fuel pumps.

Each pump is CFD optimized, flex fuel compatible and capable of flowing over 350lph. Nostrum’s high pressure fuel pump  features OEM fittings and provides all the necessary hardware, electrical connectors and accessories to simplify installation.

• 2B8/8.5 Audi S4
• S5 2012-2017
• A6 2012-2017
• A7 2013-2018
• Audi S4 2009-2016 
• Audi SQ5 2014-2015  
• Q5 Supercharged 3.0 Engines 

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Frequently ask question: 

Q: Why do your numbers say I will make less horsepower on E85 than 93 octane? 

A: Great question! The numbers we list in the product descriptions are similar to the numbers a turbo charger lists for air flow. The numbers are the "fuel system capacity to generate power" regardless of the other engine system limitations (air handling, mechanical limitations, knock propensity). Essentially the numbers are calculated assuming "sufficiently large air flow", "sufficiently capable mechanical assemblies" and disregarding knock limits. The equation uses actual observed engine volumetric efficiency (when available from sponsorship vehicles) and fuel capacity (including target pressures) to calculate power. Gasoline has more energy per mass volume than E85. So the higher fuel flow capacity will mathematically generate higher power potential for a gasoline than a high ethanol content fuel. The other variables (air flow, spark, rotating assembly strength, charge cooling, mechanical assembly strength) are highly variable from build to build. This is why we state horsepower capacity for the fuel system – representing the potential of the fuel system if you have all the other aspects of your build addressed!  

Q: What is the benefit of a higher operating pressure? (Standard bore vs PLUS) 

A: The higher operating pressure of the HPFP allows you to run the fuel injector at a higher pressure, sometimes higher than stock commanded pressure. This allows more injector flow (mass flow) by running the same injector at a higher pressure, say 240 bar rather than 200 bar. Increased pressure at the injector improves spray quality and penetration especially as boost pressure increases in highly boosted engines. So it's all about injector capacity and combustion quality (spray quality). Interestingly enough and contrary to popular belief, increasing HPFP operating pressure actually decreases volumetric efficiency.