Aerodynamic Discussion Thread
#544
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Join Date: Oct 2011
Location: The Race Track & St Pete FL
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I made a post about this on my other Thread (Radiator Hood Vent) and I quote from what I said "Ive been looking around on the internet and found some people making a hood vent for their radiator. Then using a front diffuser behind the splitter to supply air to the intercooler and vents the intercooler air into the engine bay/down the trani tunnel (above the flat underbody)."
The reason why I'm posting this here "again" is that it isn't really Hood Vent related and all aerodynamics related. The McLaren P1 uses little mechanical diffusers in front of the front tires to offset the variable wing settings. If they offset the wing that much, then there should be alot more downforce to come from under the engine compartment. So here are some pics of what I found.
![](https://www.miataturbo.net/attachments/aerodynamics-119/113880-aerodynamic-discussion-thread-toyotagt-one-tm1_zps875ead46.jpg?dateline=1400809037)
![](https://www.miataturbo.net/attachments/aerodynamics-119/113881-aerodynamic-discussion-thread-peugeot908sebring2008-mp1_zps627913d2.jpg?dateline=1400809037)
![](https://www.miataturbo.net/attachments/aerodynamics-119/113882-aerodynamic-discussion-thread-front_crushbox_zps5eaf74ac.jpg?dateline=1400809037)
The reason why I'm posting this here "again" is that it isn't really Hood Vent related and all aerodynamics related. The McLaren P1 uses little mechanical diffusers in front of the front tires to offset the variable wing settings. If they offset the wing that much, then there should be alot more downforce to come from under the engine compartment. So here are some pics of what I found.
![](https://www.miataturbo.net/attachments/aerodynamics-119/113880-aerodynamic-discussion-thread-toyotagt-one-tm1_zps875ead46.jpg?dateline=1400809037)
![](https://www.miataturbo.net/attachments/aerodynamics-119/113881-aerodynamic-discussion-thread-peugeot908sebring2008-mp1_zps627913d2.jpg?dateline=1400809037)
![](https://www.miataturbo.net/attachments/aerodynamics-119/113882-aerodynamic-discussion-thread-front_crushbox_zps5eaf74ac.jpg?dateline=1400809037)
![](https://www.miataturbo.net/attachments/aerodynamics-119/113883-aerodynamic-discussion-thread-dp1061_zpsb026ea6d.jpg?dateline=1400809037)
#545
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One other thought, besides packaging limitations, is that I shudder thinking about going off-track with the inlet for my intercooler or radiator in the underside of the car.
My flat bottom has taken a beating, repaired it twice, splitter has seen three repairs... I'm guessing I'd have had to replace the heat exchanger at least once by now with that kind of air source.
-Ryan
My flat bottom has taken a beating, repaired it twice, splitter has seen three repairs... I'm guessing I'd have had to replace the heat exchanger at least once by now with that kind of air source.
-Ryan
#556
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I have built a wing to our sports sedan regs, which allows it to go as high as the roof, and hang up to 100mm behind the rear face of the bumper. My mount is rather 949ish, though that is not relevant to my question.
I have been unable to locate any airflow data for the area immediately in front of my wing - either my google-fu is deficient, or it isn't out there. The reason for this interest is obviously to get some AoA settings for the wing based on airflow data, rather than only 'feel', or lap times. I just watched Emelio's video in which he says he doesn't know how the air behaves in this region, and if he doesn't know ...
Is anyone aware of any MX5-specific data/video/etc for this region?
I plan to do some tuft testing over the next few weeks, but if the wheel has already been invented, that would be nice...
I will post the video (if the info doesn't turn up elsewhere).
I have been unable to locate any airflow data for the area immediately in front of my wing - either my google-fu is deficient, or it isn't out there. The reason for this interest is obviously to get some AoA settings for the wing based on airflow data, rather than only 'feel', or lap times. I just watched Emelio's video in which he says he doesn't know how the air behaves in this region, and if he doesn't know ...
Is anyone aware of any MX5-specific data/video/etc for this region?
I plan to do some tuft testing over the next few weeks, but if the wheel has already been invented, that would be nice...
I will post the video (if the info doesn't turn up elsewhere).
#558
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Edit: realized this image is a photoshop. Here's the link if you still want to look at the pretty colors.
http://www.dannysteynracing.com/images/wind-tunnel.jpg
http://www.dannysteynracing.com/images/wind-tunnel.jpg
Last edited by jpreston; 11-10-2014 at 03:15 PM.