Here is a very stout AMG GT R that received a turbo upgrade for the M178 V8 courtesy o Turbo-Technik-Hamburg and their TTH-M177-800 upgrade. The 800 number implies 800 horsepower and that is just about what they hit on the dyno with torque being reduced slightly to preserve the clutches.

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That is 792.9 horsepower at the crank with a very nice looking curve:

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Torque is 701 lb-ft and it is stated the torque figure is reduced to preserve the clutches making one wonder when there will be a reliable transmission upgrade out for the AMG GT as it needs one.

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