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@NineLivesJohnny

Elan made airfoils starting at $275

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24 minutes ago, turbogrill said:

How does mounting height affect performance? On a fastback style car (lowered 280zx) how high should it be mounted? Should it extend behind the rear in a 45ish angle?

I'm not an expert, but you want it in clean air.  So further back and higher is better for the wing.  Air coming off the top of the car is going to tumble and create a low pressure area over the hatch.  Adding some vortex generators to the roof can help flow over the hatch a bit so that the wing can use good air at a lower mounting point.  Further back and higher is not necessarily better for the race car.  The further you are from the rear axle, the more lift you add to the front.   The higher you are the harder it is to make it stable and there may be issues with rules in other series.

Edited by zack_280
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@HuggyI'm pretty sure they meant 0.06lbs difference, but maybe they meant 0.6lbs per 10"?  Based on 0.2lbs/inch it would be about 14.4lbs for 72" of wang.  (minus end plates and mounting brackets of course)

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Edited by zack_280
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This is great, now I only need a turbo so I can reach enough speed for the wing to make sense ( 90mph is as fast as it goes at our local track ).

 

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23 minutes ago, turbogrill said:

This is great, now I only need a turbo so I can reach enough speed for the wing to make sense ( 90mph is as fast as it goes at our local track ).

 

 

You do triple Webers, cam, and header yet?

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On 3/28/2018 at 9:46 AM, @NineLivesJohnny said:

Open air CFD is done. 

CFD.jpg

 

I'm an aero noob. Can you translate that drag figure into a reference relative to more/less drag? 

 

For example: for a given vehicle with a given h.p., how much would "x" increase in drag effect acceleration?

 

My instinct tells me that the ratio of df to drag you are showing is very very good. I just have nothing to relate it to. 

 

 

 

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Lift (downforce) is what you want, Drag is what you don't, so the ratio of the two (L/D) is how "efficient" the wing is, or how many pounds of downforce you get for each pound of drag. He's saying they are between 10-15 (LDR) depending on the angle and speed, I can't tell you if that's particularly good or bad for this size of wing, but it seems reasonable. 

 

You can also calculate how much power it takes to overcome the drag

 

Going 60 MPH it takes:

0.48Hp at 0*

0.8Hp at 5*

1.12Hp at 10*

 

Going 100 MPH it takes:

2.4Hp at 0*

3.7Hp at 5*

5.3Hp at 10*

 

Going 140 MPH it takes:

6.3Hp at 0*

10.5Hp at 5*

14.6Hp at 10*

 

If you know your current top speed and horsepower you could calculate how much lower your new top speed will be, but hopefully you'll get there sooner with higher corner speeds. 

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Want!  Can you show a pic of how the wing would be mounted?  Is there hardware for mounting attached?

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For those champs curious, this is what a 69" version of the wing looks like mounted 2 feet above the back of a chopped up mk3 Supra. 

 

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Well, I think you might be the new “big wing” winner.

 

serious question:  are bumper bars like your car has legal for Champcar?  Is that points add?

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1 hour ago, Huggy said:

Well, I think you might be the new “big wing” winner.

 

serious question:  are bumper bars like your car has legal for Champcar?  Is that points add?

 

The forum went back and forth on it, no idea what the point value if any is. My understanding a long time ago was bars inside the bumper cover were allowed. 

 

Alot of teams have then. I assume if you made it points, people would just unbolt them and run with nothing. Not ideal. 

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Wing mounts for PCI uprights are on the way.  Honda/ Acura people will have bolt on options soon. 

 

Our mounts will allow the wing to be located in stock PCI location, rearward, or REar and higher. This will allow teams to adjust Drag for each track. 

 

Daytona you'll want it as low for minimum drag (more MPH), while CMP and other tight tracks you'll want it high for max downforce. 

 

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On 4/5/2018 at 12:58 PM, Huggy said:

Well, I think you might be the new “big wing” winner.

 

serious question:  are bumper bars like your car has legal for Champcar?  Is that points add?

 

Haha thanks, Its only 2 inches wider than the rest of the car....

 

Per an email chain with Tech after claiming it was a safety concern, they didn't seem to mind or infer that it would incur a cost penalty. Although I'll confirm after tech in Charlotte this weekend. 

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20 hours ago, @NineLivesJohnny said:

 

 

FYI 

Today is the last day for the pre-order pricing on the Miata Wings. 

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@@NineLivesJohnny, can you post a picture of the singular end plates your running on your car? 

 

Looks like we're going to need some fab work to make them line up with the holes in the elan foil

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REal world testing is best testing. 

 

Quote

Well well well. That 9 lives racing wing Johnny Cichowski makes is pretty amazing. The car used to always be super tail happy. Now it’s actually a bit too much understeer. Okay I mean like a lot. My front aero isn’t good enough. So that is my next step. But this wing is amazing. Got me a killer time. Got me 2nd place while using federal rsrr tires. First place has a better set up car with nt01’s and 40 less hp. Great driver he is.

 

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What airfoil is this wing made with?  Is that a secret sauce question or a legit one?  

 

I am asking because I want to run the numbers for my installation, this is an attractive price versus having to make another wing myself, but I want to know how it will behave.

 

Id be happy to share my results if that makes any difference.

 

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