Does anyone know....
MY99, wrx, uk model

Weight
cd.
Frontal area
gear ratios including final drive

I'm trying so set up a road dyno and need this info.

Help appreciated. Dave

 

Try here SIDC FAQIf you haven't looked already

Dave

 

Still missing cd. and frontal area, but cheers.

 

Frontal area is roughly:
(overall height - ground clearance)*(overall width excluding mirrors)
+2*(tyre width * ground clearance)

Cd is about 0.34 I think

 

For UK car:

Front Diff: 3.9
Rear Diff: 3.545
(there's a 1.1:1 bit in there somewhere too...)

Gear Ratio:
1st: 3.454
2nd: 1.947
3rd: 1.366
4th: 0.972
5th: 0.738

CD is about 3.2 or 3.4 depending on who you talk to
Frontal area is approx 2.2 sqm.