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rray200 · 03-15-2007, 02:35 PM

Ford is notorious for overrating the horsepower of their cars. They had quite an embarassing scandal back in the late '90s with their Cobra Mustang which claimed to put down 320 HP at the crank, but was dynoing at around 190-200 HP at the wheels. All those cars had to be recalled and fixed and Ford stopped making the Cobra for 2 years before re-introducing it in 2001. Plus, the 2005 Mustang GTs were on average, only dynoing at 245-250 at the wheel, despite a claim of 300 HP at the crank. In '06, they fixed the problem and now they dyno between 265-270 wheel HP, which is correct for a 300 HP car. Drivetrain loss should never be more than 35 HP.

The Shelby GT500s 440 HP at the wheel is pathetic for a 500 HP car, especially one that weighs over 4100 pounds. I mean the Z06 gets 475 HP at the wheel with the LS7.

GM on the other hand generally tends to be very accurate or underrates the power in their performance cars. Certainly the LS1 F-bodies can lay testament to that, with cars rated at 325 HP, but many dynoing 310+ at the wheels, bone stock.

03-15-2007, 02:35 PM	#5
rray200 Drives: 2018 Camaro 2SS 1LE Join Date: Dec 2006 Location: Ottawa, Canada Posts: 305	Ford is notorious for overrating the horsepower of their cars. They had quite an embarassing scandal back in the late '90s with their Cobra Mustang which claimed to put down 320 HP at the crank, but was dynoing at around 190-200 HP at the wheels. All those cars had to be recalled and fixed and Ford stopped making the Cobra for 2 years before re-introducing it in 2001. Plus, the 2005 Mustang GTs were on average, only dynoing at 245-250 at the wheel, despite a claim of 300 HP at the crank. In '06, they fixed the problem and now they dyno between 265-270 wheel HP, which is correct for a 300 HP car. Drivetrain loss should never be more than 35 HP. The Shelby GT500s 440 HP at the wheel is pathetic for a 500 HP car, especially one that weighs over 4100 pounds. I mean the Z06 gets 475 HP at the wheel with the LS7. GM on the other hand generally tends to be very accurate or underrates the power in their performance cars. Certainly the LS1 F-bodies can lay testament to that, with cars rated at 325 HP, but many dynoing 310+ at the wheels, bone stock.