it would be the same, you replaced something that blocking the hole with something that blocks the hole

get a hardtop if you want less drag

 

So Slim Jim you are saying close up the whole snout of the car, not just the brake ducts?

What about the dimple effect of a golf ball vs. a smooth ball?

I know paintballs are made smooth just so they don't have the range and accuracy of the dimpled ball. This makes it easier to place fields as less of a buffer zone is needed.

 

It's non-specific. Smoother is almost always better. In this case, flow is hindered slightly by the need to "re-attach" to the surface after the cutouts. When a fluid is flowing across a surface, flat and smooth is more efficient than notched and rough.

Golf ball dimples work in a different manner. For one, the object is rotating. As the ball rotates, the slightly rough surface aides in keeping the flow attached to the ball longer. This minimizes the size of the wake region behind the ball and drastically reduces the overall drag.

Paintballs are smooth because they cost fractions of a penny to manufacture. I see no advantage to making dimpled paintballs. The dimple effect works only when the ball is rotating...and if your ball is rotating, it's changing direction. This would make for some interesting shots. If you want really accurate shots, you need a bullet shape with axial rotation.

So...don't go out and dimple your body panels in an effort to reduce drag

 

Paintballs do rotate, more than golf balls. And yes the trajectory can get to be interesting sometimes.

I know some of the paintball manufacturers and they told me that dimpling the balls was really a very low cost to set up and no extra expense to run BUT the accuracy of the balls got so that you needed bigger fields & bigger buffer zones.

Both of those add great expense and since fields are hard to come by anyway and since that would make indoor fields all but useless they've standardized on lower tech and less accuracy.

 

The added downforce of the air hitting the cut out of the fake air duct helps you around the corners.






































J/K, I just thought it would be funny. Guess not.

 

I was surprised to read the s2k is drag limited to around 155mph.. front ducts will do very little to increase aerodynamics as mentioned above. that hardtop that extends all the way to the end of the trunk lid will help, as will a flat underpanel.

 

I believe 3M made a adhesive tape much like a shark skin to put on big Jumbo's to save fuel during long hauls. I'm typing this without looking it up to confirm. As far as I remember it worked (I think British Airways tried it / is using it) , much like the "sharkskin" swimsuits.
Is it necessarry to rotate to get less drag from a "dimpled" surface?
I don't see Jumbo's / swimmers / sharks rotate through the air / water / water


4:52PM now after doing some searching: I found a pdf (written March 2005, so not that old) at the NASA website about mimicking sharkskin to reduce drag in water. No documents about that 3M tape on airoplanes or if it would work in air. So unless you decide to use your S2000 as a submarime I would not dimple your sidepanels
The question about rotating stands though