If you get that to work out for you please let us know.
I did not see any mpg improvements when my adjustable rear spoiler was flat out, but the transition was not idea, and the devil is in the details.
However, I believe the theory you have is sound, it just does not add to down-force as I once desired, in fact I think it contributed to uplift if anything at all.
See this thread:
Rear Spoiler on Pick Up Truck - Experiment - Page 2 - Pelican Parts Technical BBS
Quote:
Originally Posted by kach22i
A cotter pin wiggled out and was lost, so I pulled the other one. I soon discovered this was a method for recording pressure/suction on the rear spoiler.
The rear spoiler is originally set near straight up, it takes less than one pound of pressure to get it to move, a couple of pounds to flatten it out all the way. Photos taken after max speed listed on picture.
I will be installing a rubber cork plug with a hole in it on the tail of the cotter pin to keep it from riding up again. |
NOTE: The adjustable angle is adjustable no longer, the piano hing has long rusted into a set position. Photos are almost 5-years old now.