I ran two tests today, the first one was a 2 mile each way steady speed MPG test, the second was a coast down test from 55MPH.
My data is not what I had wanted but it is something. I think I still need to work on my testing methods.
I will post up my summaries here and do a second post with the raw data later.
Here is the graph for the steady speed test: (Each test data is vertical showing the range of results)
data chart:
Testing notes:
winds changed a lot during the 2.5 hours of testing. They started out a 8-12 mph out of the S,SE. Part way through (A2) they were calm. Then they went back to 5-10mph out of the S,SE. My road was East West.
Temp, 84 RH over 80%, it started sunny then got cloudy.
Speed was 55MPH using cruse (same set point throughout).
The road I used was not that flat, had several high and low points, also the road was well rounded or crowned.
I warmed up car by driving 15 miles before testing.
A= normal no skirt
B= with both wheel skirts on
1W= run 1 West
1E= run 1 East
Each way was 2 miles of testing.
Measurements done with scan gauge on current trip mode, hit rest at start and wrote down number at end of two miles.
Getting good data points going east was harder due to traffic coming that way more often in the afternoon.
And the coast down test:
Chart with raw data:
Testing Notes:
Start at 55mph by cruse, hit reset on scan gauge and clutch at same spot.
Star was still warm from other test (cooled off for an hour during dinner).
I warmed up the car for 4 miles first.
all are .9 + x car lengths, measured by my eye (and by where I stopped).
Since I started at the same spot the end spot is also a valid measure.