Supra TX2k8 60 -130

[RICE RACING]

Originally Posted by TitaniumTT

Datalogs






So if I gave you the seconds it took of a datalog of a 3rd gear run from say 4-8k and the weight of my car you could get a hp?

The only variables that wont be addressed are

*Pitch factor (varies across power curve as chassis squats) not just a general offset like some rubbish meters use lol based on acel only data measures.
*Weight
*Slope
*Rolling resistance
*Intertia
*Air resistance

If you give me all those I can work it out for you.

The first is the biggest problem with using an accelarometer! I only use an accelarometer as a correction for noisey GPS derived acceleration as its not effected by vehicle pitch. The other stuff I can make an assumption for but its best to do a coast down test on each specific vehicle.

It is complex, I list the formula I developed myself on my own web site. I can measure power far better than what even RL offer as a token feature on their own Performance Box but you need to know what you are doing.

I have a friend in Europe who uses a Pectel with some extra inputs to do similar to what I can but its just nota as good for the factors I described above.

For anyone buying a performacne box I can give you the forumla for a nominal fee and teach you haw to use it its a very handy thing to have to monitor the power of your car over a race or in real world, even on 10hz data its still a very usefull tool.