Wheel Spat Help

[compdrag]

Ok I'm wanting to add spats to the front and rear wheels. I'm seeing different ones which is making it confusing. It looks like they just go in front of the wheel.
Ok so onto the questions.

Is there a stand off distance they need to be from the wheel?

How low do they need to be? look at #1

How wide do they need to be? (guessing the width of the tire)
Do they need to be straight up and down? (I would think being at an angle to be more aerodynamic towards the wheel would be better, but i'm no expert)

Picture below
which would be better 1 or 2

[freebeard]

The perfect is the enemy of the good-enough:


http://ecomodder.com/forum/showthrea...tml#post526976

Site search isn't working for me so I had to use Google to find this thread from 2010:

http://ecomodder.com/forum/showthread.php/show-me-your-wheel-spats-13669.html

Also:


http://www.toyotanation.com/forum/104-5th-6th-generation-2002-2006-2007-2011/834553-deflector-before-rear-wheels.html

[aerohead]

Originally Posted by compdrag

Ok I'm wanting to add spats to the front and rear wheels. I'm seeing different ones which is making it confusing. It looks like they just go in front of the wheel.
Ok so onto the questions.

Is there a stand off distance they need to be from the wheel?

How low do they need to be? look at #1

How wide do they need to be? (guessing the width of the tire)
Do they need to be straight up and down? (I would think being at an angle to be more aerodynamic towards the wheel would be better, but i'm no expert)

Picture below
which would be better 1 or 2

I believe that this sort of thing is not in the category of one-size-fits-all.It's going to be different for every make of vehicle.And you could spend $100,000 in a wind tunnel to optimize the design for just 1-car.
I'd recommend Goro Tamai's book,'The Leading Edge' for an in depth discussion on wheel drag.

[Gasoline Fumes]

Not exactly tested, but I went big with my front wheel spats. I wanted all of the air that would normally hit the tire directed around to the outside.



No rear spats, I have skirts along the sides.