One step required to configure the AP-22 performance meter is inputting the cDA (drag coefficient times cross sectional area) and the rolling resistance of the car to be analysed.

I have just calculated it using the applet at http://www.race-technology.com/WebPage/Uti...tDownCalcs.html

This is what I got:

cD x area 0.778
Rolling resistance 0.019

In the instructions book they say typical numbers for cDA is .7 for a modern saloon car and 1.3 for a Lotus 7. Typical rolling resistance ranges are from 0.01 to 0.03. The lower, the better.

I have used 1360kgs as weight, the top was up, and I have the oem rear spoiler. Good flat tarmac. I'll try it with the top down one of these days.

Anyone else williing to try with the s2000 or with other cars?

 

[QUOTE]Originally posted by Luis
[B]One step required to configure the AP-22 performance meter is inputting the cDA (drag coefficient times cross sectional area) and the rolling resistance of the car to be analysed.

 

me? about 80kgs, add another 40 kgs for fuel, + assorted pieces - weight saving mods = 1360kgs!