foggyjames wrote:Torque is pretty accurate, but I'm surprised that peak power is up that much - stock is 101.
A bit of a giveaway might be that BHP and torque curves should always cross at 5252 rpm....hmm!
cheers
James
Well, curves should cross in same place as only torque is 'measured' in any dyno, HP is only math. Torque X RPM / 5252 when using american units
Numbers are as much of truth as operator has made them to look truth, set gearbox losses to 0% and you see what is measured from velocity change over time, if your mass, weather etc. parameters are set correctly you have valid data. Always make sure you use same place and take average of pulls to both directions and you are quite close already.
My car's weight is bit high as car was not near empty and I'm not exactly featherweight either
If comparing results to others it should be done on same time on same road etc. so that is not possible and I would say it is useless for such, it is useful mostly to find what range power is and if you do changes to engine or loose weight (or car's weight
) you can get bit of idea what that change is going to effect.
There is no rolling road that gives you any better results, their advantage is that there is less enviromental disturbance, but we have seen power difference of 80hp from very same car and very same day in two different rolling roads. Only engine dyno can tell you how much power you really do have.
It is important to understand limitations of tools and use them properly for what they are made to
So if you are checking what something changes in car use always same measurement method, if you are using rolling road use same rolling road and same operator preferrably, etc. This is something that is rather badly understood by our(finnish) racing folks, too many of them thinks that rolling road will tell real power.
Oh yes, by calculating acceleration of my car we have come to conclusion that it should have around 109hp from wheels, what it is in engine, nobody knows.
Still a very cool toy 
