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Old 04-20-2015, 05:54 PM   #701
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Definitely an Apollo. That splitter looks a lot like mine.

-Ryan
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Old 04-20-2015, 07:41 PM   #702
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Quote:
Originally Posted by humming View Post
What car is that? looks like a gumpert apollo maybe?

It is a Gumper Apollo


Quote:
Originally Posted by Der_Idiot View Post
Is that a picture of the front end? Looks like it has a splitter followed by a recess to allow in air between the flat tray and the car? Could that feed air through the transmission tunnel and out the back by the diffuser?
And you are also right. For my setup it will work perfect
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Old 04-20-2015, 08:56 PM   #703
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Just wanted to say,the lift that Apollo is on is awesome. I've never seen adapters like that.
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Old 05-15-2015, 01:54 PM   #704
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Sorry if this has been posted before- I skimmed and didn't see it: Developing the Nissan GT-R LM NISMO

Pretty interesting advantages to running FWD



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Old 08-02-2015, 05:27 PM   #705
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I found this diffuser made from Factory 5 Racing's 818. I emailed them for the measurements, but now I can't find that email.

818 Carbon Fiber Rear Diffuser - Factory Five Parts Catalog









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Old 08-20-2015, 03:02 PM   #706
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Hey, asking the brain trust on this. I'd like to know what this wing is as I'm not entirely sure. I'm pretty sure that I know what it is but I would like to be sure.

Just under 61" wide. Legs just under 47" apart. Difference in AOA from center to end about 16 degrees.




















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Old 08-21-2015, 12:25 AM   #707
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looks like a replica APR GTC.
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Old 08-21-2015, 07:53 PM   #708
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61" wide with 47" mount spacing matches GTC-300
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Old 08-30-2015, 07:53 PM   #709
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Old 08-30-2015, 08:18 PM   #710
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<p>Could that be done with a trunk spoiler? Like the lexan type. Some really strong springs, so it is upright at low speeds and pushed out of the way at higher speeds? Or would that fail?</p>
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Old 08-30-2015, 11:54 PM   #711
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Wow, no idea the science behind that. However, I love the idea of it. I hope someone with knowledge chimes in.
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Old 08-31-2015, 01:15 PM   #712
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Not spring-loaded. According to SVA:

Quote:
Originally Posted by SVA Imports
appearances can be deceptive, it is hydraulically operated & ecu controlled based upon speed, lateral G & braking , the video was of the wings first test before the actuation perimeters were tuned!
The reason nobody would assume that it is controlled by ECU/GPS based on the video is because the activation and deactivation timing is wayyyy off, but it's obviously a work in progress.
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Old 08-31-2015, 01:17 PM   #713
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<p>But would spring loaded work?</p>
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Old 08-31-2015, 01:55 PM   #714
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"Work" is a little broad but my $0.02:
For a DRS system you want a solid fixed position when ON and solid fixed position when OFF. Most springs are linear if you ignore the far extremes of their range, so a simple spring system would be passive (uncontrolled by driver or ecu - not good) and continuously variable as speeds changed (not good). I'm sure a complex spring system could be concocted that worked around that to some degree, but likely no less complicated than other systems, with no benefit (cost doesn't count - there are other low-budget options without these drawbacks, like Keith has done)..

Last edited by ThePass; 08-31-2015 at 05:15 PM.
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Old 08-31-2015, 02:12 PM   #715
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Quote:
Originally Posted by ThePass View Post
The reason nobody would assume that it is controlled by ECU/GPS based on the video is because the activation and deactivation timing is wayyyy off, but it's obviously a work in progress.
That makes much more sense. I was watching the video and trying to make sense of how they set it up. The wing wasn't acting how I thought it should (in my limited knowledge of Aero). This makes more sense.


Quote:
Originally Posted by ThePass View Post
"Work" is a little broad but my $0.02:
For a DRS system you want a solid fixed position when ON and solid fixed position when OFF. Most springs are linear if you ignore the far extremes of their range, so a simple spring system would be passive (uncontrolled by driver or ecu - not good) and continuously variable as speeds changed (not good). I'm sure a complex spring system could be concocted that worked around that to some degree, but likely no less complicated than other systems, with no benefit (cost doesn't count - there are other low-budget options without these drawbacks, like Keith has done)..
Yeah, I am not an expert in this field at all. However, I was waiting for a good example of how this could actually work. Springs did seem like a weird source of resistance. It wasn't making any sense how springs could be functional and efficient. Thanks for the clarification.
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Old 08-31-2015, 05:07 PM   #716
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Are any of you guys cutting away behind the front wheel to allow better pressure release?



Im sure Ryan will comment(I can see he has done some work on his to help)

Relieving the pressure there isnt just about reducing lift, while thats one of the reasons its not the primary.

Wheels and tyres make really good vacuum cleaners, in which they suck all the air into the wheelarches, but then if it has nowhere easy to go, the pressure increases and creates lift, you can vent from the top of the arch and also the rear part of the arch.

One of the important things about venting arches is to keep the pressure as close to ambient as possible.

Your splitter works by forcing the air that travels underneath it to speed up and as such becomes a low pressure area.........now if you have low pressure heading straight into a high pressure area, thats exactly what it doesnt want to do.

Imagine opening a bottle of fizzy pop, the air always wants to go from high pressure to low pressure

The only way you can force it is with lots of velocity, but effectively its still like hitting a brick wall.

If you can reduce that wheelarch pressure you reduce the 'wall' and the splitter allows more air to pass out of it and hence works better.

This is also why I suggest front diffusers to allow that pressure gradient to be more gradual to reduce the 'wall' scenario.

So your now making more front downforce, you can then add more to the rear to balance the car for a net increase in overall downforce more than just a little reduction in lift in the wheel arch.

Its not as easy on a miata to remove as much as I have but it will be possible with some chopping and welding, a very good example of this would be Under Suzuki

This is what i did with my car, I know its not a miata, but one of the guys on here has said it would help if i joined in with my thoughts
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Old 04-18-2016, 02:23 AM   #718
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Quote:
Originally Posted by Oh4One4 View Post
Just under 61" wide. Legs just under 47" apart. Difference in AOA from center to end about 16 degrees.


To me it looks like its just over 60"
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Old 07-12-2016, 02:18 AM   #719
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COT wing spotted on Pikes Peak.

Aerodynamic Discussion Thread-larry_chen_speedhunters_pikes_peak_2016-2.jpg
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Old 08-15-2016, 10:21 PM   #720
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He was one of the first guys to start using the COT wings. I ran across his build thread back before I started the big COT wing thread on here.

On another note, I have also been watching those videos for the F1000 composites on youtube...there is some great tech in there, specifically the materials etc.

Quote:
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COT wing spotted on Pikes Peak.

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