Oi...NMGH...don't put me on table....   I mau....  BTW, here's the Dyno run result....Actually I didn't expect that have 90+ on the wheel....since my car was stock and only light mods so my expectation was if I can get 85+ something than happy already as I need to minus off the lost from the gearbox and friction....I notice that my car is running lean at high rpm..low and to mid end the guy said my AF is very good and stable. Seeing the chart and knowing I'm only 5whp short from getting the 100 mark...I really have the urge to try it out....but getting another 5 from NA is not going to be easy....but if I can do that, it will be very cool...and I will be able to have a 1L to 100hp engine....Hahahaha....really dreaming of that....like what Honda have for their type R engine...2L outputting 200+ hp...  After print out...
Graph 1 (whp and AF Ratio)  
Graph 2 (whp and torque)

Me not sifu la.....like iska said David's explanation is better but I also want to see how david explain it.  iska, also a dyno chart is useful for the driver to know how the engine outputs power and the torque curve so you can use that information to change your driving style so that your engine can performance better....for example, at what rpm, my torque is how much then what gear to use..etc...etc...this is useful for track driving but also can be used on daily driving one..I'm still learning to interpret the chart and use that info.