just use back your engine's official hp (from manufacturer) and deduct 20% (for manual) or 25% (for auto), then deduct 1hp per year of usage and u'll get an estimated whp of the car. But this kind of calculation is NOT accurate of course, because there are just too many variables that can't be calculated like how is the condition of your engine and gearbox and the mileage etc. etc.

This post has been edited by stormlcc: Nov 8 2011, 04:17 PM

go to sunway and ask around "where got dyno?" and u'll find it...............