most of the calculators are intended to represent maximum power required to attain a specific trap speed. never use any calculator that bases results on ET, they are even less accurate.
some people have also told me that most formulas are closer to the power at the flywheel than at the wheels. i ran it through the formula i use and came up with 349hp(counting on your car being around 3800lbs) 349 * .8 (average 20% drive train loss) = 279.2 rwhp. which consiudering how few mods you have isn't an unrealistic number for your car.
[/math nerd]
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