This may be interesting to some or I could be bored and have nothing better to do :roll:
On http://www.stealth316.com/ site there is a ¼ mile ET, MPH & HP calculator http://www.stealth316.com/2-calc-hp-et-mph.htm
Now using this I entered Dave Naxton ¼ mile times and speed figures, I used Dave’s figures as he has confirmed figures for times, speed and BHP. (Hope you don’t mind Dave but you’re the only one I Know with figures for both)
Neither calculator is completely accurate to Dave’s figures, but it you use both calculators and then take the average of the two; the figures are just about spot on. So if you have ¼ mile times you should be able to get an idea of your power.