Tifosi

IIRC, the B6/B7 4.2 V8s are chain driven. Did Audi went back to timing belt for the B8-S4s or did they stay with the timing chains ? Thanks.

Tifosi

Found the answer to my own question. And a little FYI for those that wants to know a little more about these 3.0 V6-SC Audi engines, the following is what I found on Wikipedia:

3.0 V6 TFSI 213-245kW
See also: G60
engine ID code
CAKA
engine displacement and engine configuration
2,995 cubic centimetres (182.8 cu in) 90° V6 engine; bore 84.5 mm (3.33 in), stroke 89.1 mm (3.51 in) (stroke ratio: 0.95:1 - undersquare/long-stroke), 499.2 cc per cylinder, 90 mm (3.54 in) cylinder spacing, compression ratio: 10.5:1
cylinder block and crankcase
cast aluminium alloy; forged steel crankshaft
cylinder heads and valvetrain
cast aluminium alloy, four valves per cylinder, 24 valves total, low-friction roller cam followers with automatic hydraulic valve clearance compensation, 2x chain-driven double overhead camshaft (2xDOHC - two overhead camshafts per cylinder bank - 'quad cam'), continuous adjusting variable valve timing for intake and exhaust camshafts
aspiration
hot-film air mass meter, Eaton 'Twin Vortices Series' (TVS) Roots-type positive displacement supercharger compressor with 160-degree twist twin four-lobe rotors, mounted within the Vee pumping charged air directly into the inlet manifold
fuel system
fully demand-controlled and returnless; fuel tank mounted low pressure fuel pump, common rail Fuel Stratified Injection (FSI) high-pressure direct injection (one rail per cylinder bank), Fuel Stratified Injection (FSI): two inlet camshaft double-cam driven single-piston high-pressure injection pumps maintaining a pressure of 30 to 100 bar in the two stainless steel common rail fuel distributor rails (one rail per cylinder bank), six combustion chamber sited direct injection solenoid-controlled sequential fuel injectors, homogenous mixing, stratified-charge combustion (lean-burn) at partial load
ignition system and engine management
mapped direct ignition with centrally mounted spark plugs and six individual direct-acting single spark coils; Bosch Motronic electronic engine control unit (ECU)
exhaust system
two ceramic catalytic converters
dimensions
length: 360 mm (14.2 in), width: 430 mm (16.9 in), mass: 189 kg (417 lb)
DIN rated motive power and torque outputs
213 kilowatts (290 PS; 286 bhp) @ 4,850-6,500 rpm; 420 newton metres (310 ft·lbf) @ 2,500-4,800 rpm
245 kilowatts (333 PS; 329 bhp) @ 5,500-7,000 rpm; 440 newton metres (325 ft·lbf) @ 2,500-5,000 rpm - CAKA: in the B8 S4
applications
2009 Audi A8 (D3), Audi A6 (C6), Audi A4 (B8), Audi A5, Audi S4 (B8), 2010 VW Touareg Hybrid (anticipated)
references
Parks, Jim (2008-07-17). "Audi Selects Eaton TVS™ Supercharger To Power Fuel Efficient V6". Eaton Corporation - press release. Eaton.com. http://www.eaton.com/EatonCom/SearchResults/CT_167907. Retrieved 2009-07-24. "when paired with direct injection and enhanced transmission ratio, the TVS supercharger helps the engine achieve 290 hp with an average fuel economy of nearly 24 miles per gallon"
Parks, Jim (2008-11-06). "Eaton TVS™ Supercharger Featured On 2010 Audi S4/S4 Avant". Eaton Corporation - press release. Eaton.com. http://www.eaton.com/EatonCom/SearchResults/CT_193399. Retrieved 2009-07-24. "When combined with direct injection, the TVS surpasses twin turbochargers in packaging, starting performance and responsiveness"
Parks, Jim (2009-03-04). "First Hybrid Application Of TVS® Supercharger To Appear On 2010 Volkswagen Touareg; Fuel Economy Improved 17- 25 Percent". Eaton Corporation - press release. Eaton.com. http://www.eaton.com/EatonCom/SearchResults/CT_205709. Retrieved 2009-07-24.

ranch

For the visual kind of people...

NWS4Guy

Great info and visual guys thanks!

So twin chains it is!

gk1

Can't help but to LOL at the engine ID code.