Quote:
Originally Posted by cfg83
aerohead -
I think I asked you this before. I have 3 locations for installing an airdam on my car :
I think the best one is in position 1 ala NASCAR, but the pragmatic choice for me is position 3. In particular I am doing this :
The spring mounting makes it useable in an urban environment. There is also a chain that stops the dam from deploying past 90 degrees from the downward/vertical position. The fixed side-spats are TBD.
Do you think this would be a net-gain?
CarloSW2 |
As a flat plate,the spoiler would have Cd 1.11 and full separation at both sides and bottom.The bottom wouldn't be a problem but if the sides aren't held in a bit,you'll create two jets out the sides which will create interference drag as the side-flow is attacked by air erupting off the face of the spoiler.
I would take a look at how Shinella did the Pontiac Trans Am in the 2nd gen and how it wraps around.Even if it were at position-3 it might still be superior over the simple plate.
Or fix a wand of tufts at one of the front wheel leading edges and trim the spoiler back until the tufts face backwards and not outwards.At that point you will have tailored your separated flow inward such that the outer flow edges are bent back at the tires outer leading edge.
As to the depth,you might have to trim it back and forth.Bondo got in trouble on his F-150 with too deep a spoiler and lost mpg until he trimmed it back.I had to cry! His work has no equal!