Vag Com Mk6 Gti Fule Pressure Readings
April two.0T FSI High Pressure Fuel Pump (HPFP)
Modification of the ii.0T FSI engine far beyond OEM power levels requires an additional volume of high-pressure fuel peculiarly in the midrange (3000-5000rpm) of the powerband. To understand why this fuel is needed for the midrange, 1 must showtime empathise how the fuel delivery system works in the two.0T FSI.
Apr High Pressure level Fuel Pump
April Loftier Pressure Fuel Pump Internal Parts
A low pressure fuel pump, which varies from ~40-95psi, delivers fuel from the gas tank to the high pressure fuel pump. Then the high pressure, camshaft driven pump pressurizes the fuel to up of 130bar (nearly 1900psi!) in order to spray fuel direct into the combustion sleeping room. Unfortunately on cars that have many modifications, the stock fuel pump cannot flow enough book of fuel to maintain the arrangement pressure level and the car suffers from the familiar "fuel cut" that so many modified customers experience.
The limitation of how much book of fuel the high force per unit area pump tin flow is dependent upon the volume displaced past the pressurizing cylinder inside the pump and the number of times the piston reciprocates inside that cylinder. Since the high force per unit area pump is driven off of the engine camshaft by a three lobe cam the piston of the pump cycles at 1.v times the engine rpm. (Engine camshaft turns at one-half engine rpm multiplied past three for the number of lobes on the high pressure cam lobe).
Due to this dependency on engine rpm for the high pressure fuel pump output volume, the FSI pump is capable of flowing almost 370hp at 7000 rpm but only 158hp at 3000rpm. The graph beneath illustrates the maximum horsepower potential of the stock fuel pump compared to the Apr FSI fuel pump. Also on the graph are stock and APR Phase Three horsepower numbers. Clearly, the stock pump is bereft for the output generated by this upgraded kit. The only manner to accost this issue while maintaining a pump that fits in the stock location is to modify the book of the pump'south internal pressurization chamber.
Fuel Pump Potential
In order to address the lack of fuel in the midrange, the APR FSI fuel pump increases the book of fuel from the high pressure pump by over 40%. Simplified, this is achieved by modifying some key internal parts within the pump. Changing these components requires precision machining of the new components with special surface treatments equally well equally enlarged, redesigned seals. Using junior components on this disquisitional function tin can lead to many issues from gasoline in the engine oil (from a bad seal) to complete engine failure (from a seized piston in the high pressure pump).
To requite an idea of the tolerances involved, the concluding surface finish on the piston inside the fuel pump is so critical that information technology tin exist damaged by touching them with bare hands. The tolerances between the piston and the new barrel the piston rides in can only be measured by a multi-million dollar machine which uses air volumes to measure out the part clearances to within microscopic levels.
Fuel Pump Components
The components used in the Apr pump are also of a high caliber. The piston and barrel of the new pump are made of a certified and heat-treated bearing-grade stainless steel and take a special diamond like coating. The seals used in the pump are made of a high performance, filled polymer with a high modulus jump to retain the seal forces throughout the life of the product. The cross section of the seal is also of a proprietary design to maintain integrity over many years of use.
APR FSI pumps have been track tested since 2006 with several hundreds of thousands of miles of combined usage. Each APR pump starts out as a make new OEM pump and is then modified with the new components by APR and undergoes a rigorous testing process on our high pressure fuel pump tester. Once a pump passes our standards it is serialized and shipped to the customer.
Apr HPFP Test Auto
The April fuel pump tester is a key chemical element in the APR fuel pump product process. With the fuel pump tester we are able to perform several tests to ensure every pump is working to the high standards nosotros have prepare for it. First the fuel pump tester allows us to perform the critical initial interruption-in of the new pump. Past bringing the pump upward to the full operating pressure, nosotros can confirm that the seals in the pump are properly installed and non leaking. Nosotros are as well able to verify operation of the fuel pump selenoid to ensure the fuel is being injected at the correct time and in the correct amount. Finally, a performance exam is performed to brand sure that the pump output is within specifications. This level of quality control ensures a lifetime of worry free miles with an APR FSI loftier pressure pump.
To ensure flawless drivability the APR two.0T FSI fuel pump requires Apr engine management recalibration to allow for the increased size of the Apr fuel pump. Currently, some APR Stage Two clients will be able to have advantage of increased horsepower and torque upwardly to 25hp and 35lb ft with April fuel pump specific engine management performance recalibrations.
Motorsport Development
When it comes to a critical component that can mean the difference between winning a race and not finishing at all, motorsport teams must use the best components bachelor. Motorsport teams around the earth accept put the APR Loftier Pressure Fuel Pump though cruel and demanding testing and have proven once again and once more the reliability and performance you can await from each and every April Loftier Force per unit area Fuel Pump. The initial success of the R-GTI and Apr's own motorsport team have lead other noteworthy teams around the earth to rely on Apr.
APR Motorsport
First in 2007, APR Motorsport brutally tested the FSI High Pressure Fuel Pump for thousands of miles at loftier stress levels. All iii race cars successfully completeted their offset seasons without a unmarried effect from the April Loftier Pressure level Fuel Pump. The squad continues to put each pump though the same brutal testing race after race.
VWMS Scirocco GT24
Afterwards seeing the great success of APR's own motorsport team, Volkswagen Motorsport of Frg commissioned Apr for their own High Pressure Fuel Pump needs. The 24 hours of Nürburgring is considered to exist i of the virtually demanding endurance races in mod history and knowing that millions of dollars of preparation investment could hinge on the results of such a critical component, VWMS chose to GO APR.
SEAT Sport
April has accomplished Tier-i supplier status with SEAT Sport soley due to SEAT's needs for a quality Loftier Pressure Fuel Pump solution. SEAT Sport operates several spec racing leagues throughout several different countries and chances are if you're driving a SEAT 2.0T FSI race car, you've got APR under the hood.
VWGoA R-GTI
Volkswagen Group of America's ain R-GTI concept machine has more than 430 horsepower and enough of fueling thanks to an Apr Stage III Turbocharger Organisation and the APR Loftier Force per unit area Fuel Pump. VWGoA relies on April for the engine operation of their concept car evolution and this is a slap-up testament to April's condition every bit the world'south leader in VAG performance.
| Year | Model | Engine | Part Number | Cost Exc. VAT | Price Inc. VAT | |
|---|---|---|---|---|---|---|
| All | All | 2.0T FSI | MS100016 | £836.32 | £1003.59 |
Source: http://www.goapr.co.uk/products/fsi_fuel_pump.html
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