Aeromods and Cd imrpovements - anyone have data short of full boattail improvements?

[OtherCarASaab]

New here, had fun perusing, now I'm down to the data questions:

Ok, so I've seen Cd data for AeroCivic and a few others, showing the extreme Cd improvements they've gotten with a full boat-tail... but does anyone have the data for 'milder' Aerodynamic modifications?

Specifically, I'm wondering if any Cd data exists for items such as:
Belly Pan
Kammback/short tails
Wheel Well Covers (rear wheel wells)
Moon Covers - wheel/hubcaps

I've seen the Belly Pan results at ~2-3% MPG in ABA testing per the Wiki article, wondering what else has been documented in terms of MPG or Cd tests.

[Piwoslaw]

From the testing I did I got a 7% improvement in fuel consumption @ 70km/h and 8% @ 100km/h for the following:

• removed roof rails
• lower grille opening totally covered
• Kammback
• rear wheel skirts
• folded passenger side mirror

I also did coastdown tests and chrunching the numbers implied a Cd reduction of only ~3%, from 0.334 to 0.324. The test conditions were not ideal, but I haven't been able to find better conditions since then.