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I am not sure if you are looking for actual spec numbers or overall...

Benefiting from two exhaust gas turbochargers with intercooler, the V8 power unit develops a staggering 450 bhp at 6000 rpm. The foundation for this power is laid by the V8 normal-aspiration engine displacing 4.5 litres, featuring four valves per cylinder, and boasting Porsche’s VarioCam variable intake camshaft system.

Since this increase in power on the Cayenne Turbo also means higher loads acting on the engine, the cylinder heads of the Cayenne Turbo are made of special high temperature-resistant aluminium alloy which has already proven its qualities in motorsport. On the intake side the ducts are modified for the higher throughput of fuel/air mixture and double valve springs are featured on the outlet side to ensure an absolutely safe and reliable closing process. Also reflecting the higher engine load, the pistons are forged and are additionally cooled by oil injection jets.

Following the same philosophy as on the 911 Turbo, the two exhaust gas turbochargers are in parallel arrangement. Small intake manifolds, short exhaust manifolds and a mixed flow turbine with mass inertia reduced to a minimum ensure a very good response and supreme performance. To increase the temperature of the air entering the turbines in the interest of optimum combustion under full load, the turbine housing is made of high-quality cast steel. The compressed air flowing out of the turbine is then re-cooled to provide a high cylinder charge and reduce the temperature of the system components to a minimum. Intake air flows on subsequently to the two compressors through one air filter housing each for the left- and right-hand row of cylinders. Finally, the compressed air flows on to the E-gas adjuster via two intercoolers positioned respectively in front of the wheel arches left and right.

The bypass valves are integrated in the turbine housings, turbocharger pressure being adjusted by controlling the bypass valves through a joint cycle valve masterminded by the engine management system. Maximum turbocharger pressure at full load is approximately 1.6 bar and is reached at a speed of 2250 rpm. Then, as engine speeds increase, boost pressure is cut back and remains at approximately 1.5 bar with the engine running at maximum power (450 bhp at 6000 rpm).

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or

  • Turbo compressor
  • 4,511 cc 4.5 liters V 8 front engine with 93 mm bore, 83 mm stroke, 9.5 compression ratio, double overhead cam, variable valve timing/camshaft and four valves per cylinder
  • Premium unleaded fuel 91
  • Fuel economy EPA highway (mpg): 18 and EPA city (mpg): 13
  • Multi-point injection fuel system
  • 26.2 gallon main premium unleaded fuel tank
  • Power: 336 kW , 450 HP SAE @ 6,000 rpm; 460 ft lb , 624 Nm @ 2,250 rpm

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Bucking the standard Porsche direction, instead of a KKK German Turbocharger the '03 to '06 Cayennes use a IHI (Ishikawajima Harima Heavy Industries, Ltd) RHF5 Turbocharger. The '07 and newer Cayenne's use a Mitsubishi TD04 Turbo. IHI Turbos are manufactured around the world, including the U.S (in conjunction with Borg Warner) and in Germany.

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Thanks guys! great info! I may have some oil seals to be replaced in mine and was wondering where I can have them rebuilt. I have mild smoke on hard acceleration while I'm taking off and noticed some oil residue on my hatch after a few rides. was thinking the turbos and hoping it's not the engine block. I don't hear any engine noises though. just putting two quarts of oil every 600 miles.

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Probably the Turbos, and like I said Scroll produccts is a highly reputed place to have them done. They started in Europe years ago and just opened the U.S. shop a couple of years ago. I live in Washington State but shipped the Turbos off my RS6 to them (New Jersey) upon recommendations and I'm very happy with the job and the price (around $1300 for rebuild & some updates). Before you just pull the Turbos have a compression and leakdown check done just to confirm as the Cayenne's are not as bullet proof as some of the other Porsche or Audi models that I'm used to.

Edited by hahnmgh63
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