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Ever since the 03-04 Cobra, Ford has seriously underestimated power output of the engines. A very good friend of mine is the head tuner for American Muscle (biggest mustang aftermarket part source in the US) and, well, here are some of the numbers they have gotten from their bone stock cars on a Mustang Dyno, which typically reads lower than a dynojet:
2013 Boss 302
- Advertised: 444 crank hp
- Dyno'd: 405rwhp (given a 15 - 20% drivetrain loss, this would yield 476 - 506 crank hp)
2013 GT500
- Advertised: 662 crank hp
- Dyno'd: 590 (given a 15-20% drivetrain loss, this would yield 694 - 737 crank hp)
These are not fluke stories either, as it seems Ford underestimates all their cars. If they're saying the GT350 is pumping out 520, and they're pulling GT3 laptimes, I'd believe it, because given Ford's track record, 520 is likely to mean close to 600.
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2012 BMW E92 M3 |