[Christ]

Originally Posted by aerohead

After Texas Tech published and reported on there R&D,some big guns were interviewed by Sport Truck Magazine for their big Aero issue.
Some trucks were reported to deviate from the "norm".
One carmaker rep indicated that swinging the tailgate from the TOP actually reduced drag for some pickups.
Up or down can be within 1% and easily lost within the signal-to-noise ratio of some testing.
We probably ought to stick with case-specific investigations of single vehicles.

I agree.

I find it difficult to quantify improvements for a specific truck against other trucks without some context, because each model has varying cab height, bed length, etc.

What specifically works for one truck may be totally off for another. The only concrete point is that they all are affected by the same rules, but the workarounds are often different to a degree.