Know of a place where you can do some uninterrupted, non-public testing.....like an abandoned air field, long lonely stretch of unused roadway etc.
Hook up 5th wheel..open bed, OEM tailgate
Get up to 70 mph then place truck in neutral and let it coast to a stop....time/measure distance
Repeat with open tailgate
Repeat with louvered tailgate
Repeat with tonneau cover partial closed
Repeat with windows open
Oh never mind. Go camping and don't make RVng so complicated.
Is it time for your medication or mine?
2007 DODGE 3500 QC SRW 5.9L CTD In-Bed 'quiet gen'
2007 HitchHiker II 32.5 UKTG 2000W Xantex Inverter
US NAVY------USS Decatur DDG31