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  1. #1
    Senior Member Three Rings Frenetic's Avatar
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    2.9l V6tt engine self-study guide request

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    Does anyone have access to Audiís engine self-study guide for the 2.9l V6tt? It would be similar to this for the C7 S/RS 6/7:

    https://www.audiworld.com/forums/att...self-study.pdf

    Thanks.
    2017 S7 | Glacier White Metallic

  2. #2
    Established Member Two Rings
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    I found this with a quick search.

    https://audi-encounter.com/en/2Turbo-V6

    Sent from my Z982 using Tapatalk

  3. #3
    Senior Member Three Rings Frenetic's Avatar
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    Thanks.

    I posted this same question in the B9 5 forum and someone posted this: https://drive.google.com/open?id=1fX...qvTKEP2S-NEJpT

    Itís for the 3 liter turbo in the S, but I think itís somewhat similar.

    Notice how this engine has low and high pressure fuel systems. I take that this means it has direct and port injectors (although itís not explicitly stated). That pretty much means no more carbon buildup. Iím curious if the 2.9 is the same?

    So, still looking for it.
    2017 S7 | Glacier White Metallic

  4. #4
    Established Member Two Rings
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    The motor guide on their site states they took the 3.0 and made the 2.9 from it.

    "A new feature for the V6 TFSI engines, the 3.0 TFSI and its high performance variant, the 2.9 TFSI, whose development Audi headed and which Porsche also uses, is the central location of the injectors in the combustion chambers. This feature can also be found in the 4.0 TFSI. At Porsche the engines are already running in the Panamera.

    The central location of the injectors is an important component of the highly efficient B cycle combustion process, employed by both six-cylinder engines. Here too we have an Audi development based on the AVS. With its artificially shortened compression phase, the B cycle enables an engine process with a significantly higher base compression ratio. Combined with a power stroke that, while normal, is longer relative to the compression stroke, this allows for more efficient combustion and increased engine efficiency.
    Under partial load, the Audi valvelift system enables a very short intake aperture duration coupled with early closure of the intake valve. This shortens the intake phase. At higher loads, the system switches to a camshaft contour with a longer opening time and a larger valve stroke. The engine then operates with a normal compression ratio and maximum throughput.

    In the V6 engines the turbochargers Ė one in the case of the 3.0 TFSI, two for the 2.9 TFSI Ė also lie in the inside V. This arrangement allows a compact design and minimizes flow loss, for spontaneous and direct engine response. Another specialty of the V6 TFSI engines is the exhaust manifold integrated in the cylinder head as an element of thermal management, so that the manifold is flushed by coolant. This helps the engine to heat up quickly. When the engine is warm, the system reduces the exhaust temperature. The result is lower fuel consumption, particularly during sporty driving. As with the 4.0 TFSI, the common-rail injection system builds up to 250 bar of pressure. This high pressure atomizes the fuel very finely to improve the combustion process."

    "High-performance engine: the new 2.9 TFSI
    With the new 2.9 TFSI Audi is following on from where the legendary 2.7-liter V6 performance unit left off; the latter delivered 280 kW (380 hp) in the first RS 4 Avant (2000 through 2001). The new six-cylinder engine greatly outdoes the old one. It delivers 331 kW (450 hp) and releases a torque of 600 Nm (442.5 lb-ft) from 1,900 to 5,000 rpm (combined fuel consumption: 9.6 Ė 8.7 l/100 km* (24.5 Ė 27.0 US mpg); combined CO2 emissions: 224 Ė 197 g/km* (360.5 Ė 317.0 g/mi)), catapulting the new Audi RS 5 into the sports car league: zero to 100 km/h (62.1 mph) in

    3.9 seconds, with an optional top speed of 280 km/h (174.0 mph). In the NEDC cycle the 2.9 TFSI consumes 8.7 liters of fuel per 100 kilometers (27.0 US mpg), equivalent to emissions of 197 grams of CO2 per kilometer (317.0 g/mi).

    The new high-performance six-cylinder engine from Audi directly derives from the 3.0 TFSI. Because of the greater forces in the interior, the stroke has been shortened by 3 millimeters (0.1 in) to 86 millimeters (3.4 in). To increase resilience, we further increased the crankshaft main bearing diameter by 2 millimeters (0.08 in). The most important technological components are the same for both engines: the aluminum crankcase with steel cylinder liners, the new TFSI combustion process with central injector location and thermal management with the exhaust manifolds in the cylinder heads.

    In the 2.9 TFSI the exhaust side lies in the inside V. Instead of the mono twin scroll turbocharger, two turbochargers compress the intake air, as formerly in the RS 4 engine. Each of them is responsible for a cylinder bank and builds up to 1.5 bar of boost pressure. In the intake system of the V6 biturbo, stainless steel components allow the air to flow almost unimpeded, while in the exhaust system switchable flaps modulate the sound according to the load and the driverís request. "

    https://www.audi-mediacenter.com/en/...s-at-audi-8748

  5. #5
    Established Member Two Rings
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