Supra TX2k8 60 -130

***TitaniumTT*** · 02-08-2011, 08:51 PM

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?

RICE RACING · 02-08-2011, 09:02 PM

Quote:

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.

02-08-2011, 08:51 PM	#1
*TitaniumTT* Test Whore - Admin Join Date: Mar 2008 Location: Right Behind you son Posts: 4,581 Rep Power: 10	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 Angry Stig- DGRR 2009, 2011, 2012 & 2013 - Best FC DEALS GAP!! WOOHOOOO!!!!! 2015 Audi S4 - Samantha - Zero Brap S4 2004 RX8 - Jocelyn - 196rwhp, 19mpg fuel to noise converter 2000 Jeep Cherokee Sport - Wifey mobile - Now with 2.5" OME lift and 30" BFG AT KO's! So it begins 1998 Jeep Cherokee - 5 spd, 4" lift, 33" BFG's - Rotary Tow Vehicle 1988 'Vert - In progress 1988 FC Coupe - Gretchen -The attention whore BEAST! I'm a sick individual, what's wrong with you? I'm pure Evil I'm still insane, in the best possible way. I think Brian's idea of romance is using lube. Your rage caused the meteor strike in Russia. The Antichrist would be proud of his minion. You win with your thread. Most everything It's a truck with a steel gate on the back. Just a statement of fact Motec M820, AIM dash, ported 13B-RE Cosmo, 6-spd trans, 4.3 Torsen, custom twin wg fully divided mani, Custom 4" split into 2x 3" exhaust, Custom HMIC, Custom custom custom custom I like to welder stuff.... No Bolt-ons allowed. Dyno'ed @ Speed1 Tuned by me - 405rwhp on WG.... WM50 cuming soon. *-Angry Motherfcker Mode ENGAGED-**