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    HP from  
    Top speed  
    calculator  
     
    copyright 2010   Top speed (mph)  
     
        Headwind speed (mph)  
        Hedwind angle (deg)  
     
        Frontal area (sqft) stock cars 22.5 to 23+/- formula cars 14+/-
        Cd typically .4 to .7  
     
        Road HP  
        Likely dyno HP  
     
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