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Drag Wing vs. High Wang: One is Dangerous? 

There’s been a lot of talk lately about drag wings, high wings, and what actually works on a real car. So instead of guessing, arguing, or trusting the internet, we tested it.

The goal was simple: compare a traditional drag-style wing against a higher-mounted wing and see what the data actually says.

We wanted to know the same thing everyone else wants to know:

Does the drag wing make less drag?
Who makes the most downforce?
What happens in yaw?

The results were interesting — and honestly, they were closer in one area than a lot of people probably expected.

The Test

For this comparison, we tested two different rear wing layouts:

1. A traditional drag-style wing
   1. 20" long 
   2. level with the body 
   3. .375" gurney flap 
2. A Nine Lives Racing high-mounted wang, "a high wang."
   1. Wang is totally relaxed at 0*aoa 
   2. basic endplates 
   3. 71" wide

 

The big question going into the test was whether the drag wing would have a meaningful advantage. A lot of people assume a drag wing should be more efficient. The idea is that it may add stability without causing drag.

That sounds reasonable.

Drag was increased on both, but equally. 

The internet says they reduce drag. It was wrong. 

The first major takeaway was drag.

The drag wing and the high wing both increased drag, going from 318 lbs (no wing) to 425 and 422 lbs. The difference of 4 lbs between the two is nominal, meaning not even a stopwatch would show it.

So if the whole argument for the drag wing is “it makes way less drag,” this test did not show that.

In this case, the drag numbers were close enough that drag alone was not the deciding factor.

Downforce Is Where the High Wing Pulled Away

The bigger difference showed up in downforce.

In this test, the high wing made 507 lb of downforce, while the drag wing made 383 lb. That is a meaningful difference, especially because the drag penalty between the two was very close.

To be clear, both wings worked. Both produced downforce, and both added drag. The data simply showed that, in this configuration, the high wing produced more downforce for a similar drag cost.

That extra downforce may be useful, but it also may be more than some cars need. This is where adjustability matters. With the high wing, angle of attack can be reduced — even moved into a negative setting if needed — to pull rear downforce out of the car and help rebalance it if the front end starts to feel light.

So the takeaway is not that one wing is automatically right for every car. The takeaway is that both designs produced results, and the high wing showed a wider tuning range in this specific test

The Scary Part: What Happened at Yaw

The most shocking result showed up during the yaw testing.

Yaw is when the car starts to step out or move sideways instead of traveling perfectly straight. For this test, we looked at both wings at 10 degrees of yaw to see what kind of side force they produced and how they behaved when the car was no longer perfectly straight.

That is where things got alarming.

At 10 degrees of yaw, the drag wing completely reversed direction and started making lift instead of downforce. going from 192lbs of rear downforce to 126lbs of lift. lifting the car off the gound. The high wing fell but kept making downforce, keeping the car on the ground. 

That is scary.

We are not talking about some wild, extreme angle here. This was only 10 degrees of yaw, and the wing was already trying to pick the car up off the ground. When you think about how often we see Pro Mods and other drag cars get loose, unload, or even take flight, this becomes a serious question:

The internet was wrong? 

Note: sun under tire = airborne

If the car starts to get sideways, is a traditional drag wing helping save the car — or helping it fly?

Watching the rear tires come off the ground on cars that get sideways is not uncommon in our sport. We think we may have found out why, and this deserves a deeper dive.

Side Force

The results made the difference even clearer. The high wing produced more correcting force, helping push the car back straight instead of allowing it to continue rotating.

That may be one of the biggest takeaways from the entire test. At that point, it was not just about downforce or drag anymore. It became a question of stability and safety when the car is no longer perfectly straight.

The Drag Wing Still Worked — It Just Didn’t Win

This is important: the drag wing was not useless.

It still made downforce. It still affected the car. It still had a place in the conversation.

But compared directly against the high wing, it did not make as much downforce, and it did not save enough drag to make up for that loss.

That is the real story.

Not “drag wings are garbage.”
Not “high wings are magic.”
Just this: The high wing was more stable, made more downforce, and the drag was close enough that the high wing was the better performer in this test.

What This Means for Racers

If you are building a race car, the takeaway is pretty straightforward.

Test it. Look at the numbers. Look at the loads. Look at what the car actually needs.

Aero is always a tradeoff. You are not just trying to make the biggest downforce number possible. You are trying to make the car faster, more stable, and easier to drive.

But when two setups have nearly the same drag, and one makes significantly more downforce, that is hard to ignore.

Final Results

In this test:

The drag numbers were close.
The high wing made more downforce.
The drag wing worked, but the high wing worked better.

The high wing added slightly more drag, but it also made a lot more downforce. For this test, that made the high wang the clear winner.

As always, we are not here to guess. We are here to test.

And this time, the data says the high wang wins.

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I’d use that as the base blog post. One thing I’d add once you have the actual CFD images/files ready is a small table like this:

The first major takeaway was drag. The drag wing and the high wing both increased drag, going from 318 lbs (no wing) to 425 and 422 lbs respectively. The difference of 4 lbs between the two is negligible.

So if the whole argument for the drag wing is "it makes way less drag," this test did not show that. In this case, the drag numbers were close enough that drag alone was not the deciding factor.


DATA 
If you want to see all of our data and all of our post-pro to come to your own conclusions or just to double-check our findings, you can download it here