VIS Motorsport High Pressure Fuel Pump Internals Upgrade Kit for Audi Audi S4 / S5 / SQ5 / RS4 / RS5 (B9) EA839 V6 Turbo Applications Only

VIS Motorsport High Pressure Fuel Pump Internals Upgrade Kit for Audi Audi S4 / S5 / SQ5 / RS4 / RS5 (B9) EA839 V6 Turbo Applications Only

Modification of the EA839 engine B9 S4 / S5 / RS4 / RS5 / SQ5 far beyond OEM power levels requires an additional volume of high-pressure fuel in order to avoid "fuel cuts" especially in the midrange ( 3000-5000 rpm ). In many cases we see the factory fuel pump begin to suffer from pressure loss.

The limitation of how much volume of fuel the high pressure pump can flow is dependent upon the volume displaced by the pressurizing cylinder inside the pump.

In order to address the lack of fuel and as power outputs achievable never stop increasing VIS Motorsport developed the EA839 HPFP UPGRADE KIT to suit every customers build needs, also the first company who designed and implemented a working bigger kit/size available to customers around the world.

It has 20% more surface area and is capable of over 275 bar+ of pressure, and less weight by 10% compared to OE (fuel pressure is dependant to type of engine as it fits many applications)

This monster is ready for big turbo applications or just for stock power giving another 15 bar fuel rail pressure and some extra hp especially in mid-range

Piston head is optimized for ideal hydrodynamic flow. The surface is hardened and heat treated in 2 different stages

It's been tested on many configurations and different hardware/software setups around the globe and all have proven again and again the reliability and performance you can expect from each and every VIS Motorsport HPFP Upgrade kit.

Please note

- Install tool included with the internals, the tool is unique to this kit! - Can be purchased seperately if required - Here

- Will only fit into the OEM HPFP

- The image in this listing shows the old original internals against the uprated Vis part, original is on the top, the Vis is the bottom

- This product does NOT fit any of the earlier supercharged EA839 engines (B8 / B8.5 S4 / S5, etc) - They use VISEA888G2 instead!

Tech Facts

- Clearance at top of piston 0.001-0.00015

- Deviation of circularity max 0.001mm

- 370-450hb before rectification

- Nitride at depth of 0.15-0.25

- Hardness of hv10-760- kgf/mm2 for sleeve and hv 50-56/1200-1400kgf/mm2 for piston

- Nitrided H13 alloy/ 34mocr11 /rul 1vb3/ rul1vc2

- Good thermal and shock resistance or heat cracking

- Mechanical characteristics and thoghness in hot condition,constant hardness throughout           the production cycle

- High micro purity-level suitable for polishing

- Posibility to be coated to pvd/pa cvd methods flame induction hardening and nitriding

- Tensile strenght 1960kgf/mm2

- Yeld strenght 1570kgf/mm2

This product fits the below models

• B9 S4 
• B9 S5 Coupe
• B9 S5 Sportback
• B9 SQ5
• B9 RS5
• B9 RS4 
• Also fits facelift / B9.5 variants where the EA839 engine is retained 

This product does NOT fit any of the earlier supercharged EA839 engines (B8.5 S4 / S5, etc) - They use VISEA888G2 instead