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Originally Posted by Damn True
Camaro Cd - .34, frontal area - 21.6sq'
Chevelle Cd - .423, frontal area - 25.5sq'
Difference - HUGE
Now, take those numbers and work the math in the links I provided previously.
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Here's a simplified formula I used to get rough numbers of HP requirements. Works best with real numbers for HP and Top speed and back into the CD and FA, then solve for HP requirements for any given speed. Meaning, if you top end the car, and have real dyno numbers, you can get a combined value for CD and FA for your exact car. Just takes some simple reworking of the formula.
HP = (CD * FA * V^3) / 150,000
If you have your top speed and HP then: CD * FA = (HP * 150,000) / V^3
With the numbers above to go 200 MPH w/ each requires:
391.68 = (.34 * 21.6 * 200^3) / 150,000
575.28 = (.423 * 25.5 * 200^3) / 150,000
This is a simplified formula and doesn't allow for rolling resistance and is probably more indicative of RWHP than at the crank.
If I were tackling the speed aspect, I'd start by trying to reduce the drag and frontal area. Dropping the car helps on the latter. Lots of ways to work on the former.
Contrary to what some of you are saying, I don't see any reason that car couldn't be made to run that fast reliably and with stability. That doesn't mean just anyone could do it - reliably and safely. It also doesn't mean it would be easy.
John Buscema
XV Motorsports
www.xvmotorsports.com