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Old 02-06-2017, 02:12 AM   #1
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Boxster 986 Aerodynamics @180km/hr

Air Flow analysis on the mighty Porsche Boxster 986 running down at 180km/hr in the Shanghai Industrial Park (at night, cops sleeping and all!).

Just leaving this here for you guys to enjoy









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Old 02-06-2017, 03:02 AM   #2
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Very cool.......Lots of red over the roof.
Quite interesting.
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Old 02-06-2017, 03:24 AM   #3
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I'd like to see it with the spoiler up
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Old 02-06-2017, 03:31 AM   #4
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Originally Posted by itsnotanova View Post
I'd like to see it with the spoiler up
Yes, I thought the same!
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Old 02-06-2017, 03:53 AM   #5
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I'd like to see it with the spoiler up
Lots of little internet lawyers on this board these days. Gotta be careful with these things

That was actually what started me. Quickly modeled the 'aircraft style wing' I got on the back of my Boxster and ran lift & drag on the whole assembly to find out I have the rear lifting up starting at 80km/hr (flying, just like an aircraft, how fun lol). You don't want to see this at 180km/hr trust me (embarrassing).

The stuff you find on eBay these days huh LOLLL Certainly looking good, Go Go Ricer Go!!!

The brick wall stocker is not entirely better... it badly loosen up the front past 150km/hr but does actually provide amazing down-force on the rear-end. Also trying to find out what's the best staggered wheel setup for my Boxster. Seeing a lot of drag on the front's 245, the flow then close and over-pressurize right on the rear 265. Trying to find a tire width/setup so that pressure ends up to be as close as to atmospheric as possible both on the fronts and rears. Fascinating stuff for sure!

Enjoy the top wallpaper in a meantime
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Old 02-06-2017, 04:01 AM   #6
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Great little city-car other than that - if kept <100km/hr LOLLL

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Old 02-06-2017, 05:06 AM   #7
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Fred you need to submit this [edit: the first pic] to Blipshift for printing onto a black shirt, I would buy one for everyone in my family. Awesome!!!!

PS Better submit it now before someone steals the graphic and submits it anyway, happened to a guy on Rennlist that had some turbo design that is now sold in several placed without his consent...
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Old 02-06-2017, 05:23 AM   #8
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PS Better submit it now before someone steals the graphic and submits it anyway
By all means, I'd only feel flattered bud, not robbed. Do they print colors? jeez can't be cheap, no?

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Old 02-06-2017, 07:04 AM   #9
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Nastran?
You love playing for CFD, don't you LOL
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Old 02-06-2017, 07:51 AM   #10
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Why do I get the feeling I'm bothering you guys LOL

Hey we have our own dedicated 986 forum's Virtual Wind Tunnel man! Want to know exactly where to place your Ram Air Intake on your Boxster?!

As silly looking as this is, it is indeed Nastran w/ TMG thermal/flow solvers (Simcenter3D). Should have bought the new 718 as company car instead right?

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Old 02-06-2017, 08:24 AM   #11
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this is airspeed, yes? so we are seeing the air accelerating over the roof and can assume some venturi effect (lift) as a result? also some acceleration along the side creating negative pressure at the air intake?
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Old 02-06-2017, 08:36 AM   #12
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Using velocity here, correct (dynamic pressure). Haven't posted the lift & drag plots fearing to be blasted by the anti-geak community LOL

Wallpaper purposes but can upload if you need anything specific Anything for you man
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Old 02-06-2017, 08:45 AM   #13
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Quote:
Originally Posted by steved0x View Post
Fred you need to submit this [edit: the first pic] to Blipshift for printing onto a black shirt, I would buy one for everyone in my family. Awesome!!!!

PS Better submit it now before someone steals the graphic and submits it anyway, happened to a guy on Rennlist that had some turbo design that is now sold in several placed without his consent...
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By all means, I'd only feel flattered bud, not robbed. Do they print colors? jeez can't be cheap, no?
So... who is going to start the thread for a group buy of the T-shirts?
Or do I have to just make my own locally?

Luccia, you could stock these at Pelican, Black T-Shirts with the first wind tunnel image and a Pelican Parts/986Forum logo. We will buy them.
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Old 02-06-2017, 08:58 AM   #14
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So... who is going to start the thread for a group buy of the T-shirts?
Or do I have to just make my own locally?

Luccia, you could stock these at Pelican, Black T-Shirts with the first wind tunnel image and a Pelican Parts/986Forum logo. We will buy them.
Please make it a good one like Gildan or Hanes Beefy T
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Old 02-06-2017, 09:09 AM   #15
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Go with BlipShift
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Old 02-06-2017, 09:56 AM   #16
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Go with BlipShift
I think it would get wider distribution that way too...

Also please add a 3rd radiator if it is a Boxster S
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Old 02-06-2017, 10:01 AM   #17
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Can you re-run the aerodynamics with your new center caps? I just know they will improve things. Just kidding, I am a big fan of your work. I was also surprised to see that your wing creates lift, just goes to show that you can't eyeball aerodynamic effects, the wing looks like it would create downforce.
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Old 02-06-2017, 10:41 AM   #18
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Quote:
Originally Posted by steved0x View Post
I think it would get wider distribution that way too...

Also please add a 3rd radiator if it is a Boxster S
Picky bastard

Quote:
Originally Posted by PaulE View Post
Can you re-run the aerodynamics with your new center caps? I just know they will improve things. Just kidding, I am a big fan of your work. I was also surprised to see that your wing creates lift, just goes to show that you can't eyeball aerodynamic effects, the wing looks like it would create downforce.
That just proves what I and others have said about putting untested aero on your car.
Just because it looks like it will be beneficial, doesn't mean it will be

Fred, can you do a run with the top down and see how it differs from top up?
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Old 02-06-2017, 10:57 AM   #19
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Quote:
Originally Posted by steved0x View Post
Also please add a 3rd radiator if it is a Boxster S
hmmm, well spotted



Quote:
Originally Posted by JayG View Post
Fred, can you do a run with the top down and see how it differs from top up?
I'm also dying to see this. Hard job tho as the model needs to be a water-tight solid body. But I'll try for sure.

Quote:
Originally Posted by PaulE View Post
Can you re-run the aerodynamics with your new center caps? I just know they will improve things. Just kidding, I am a big fan of your work. I was also surprised to see that your wing creates lift, just goes to show that you can't eyeball aerodynamic effects, the wing looks like it would create downforce.
Paul - can't do that. Those caps create such a violent vortex the team at Porsche studio will need to recall all those GT3. See it on the bright side though; so violent that the brake dust is sucked off the wheel (self-cleaning wheel)

Re wing: does not create any downforce or let's say nothing like the stock slab (tombstone?) that Porsche designed. The CFD I ran was based on my actual set-up (the wing + slab up). The Ricer in me said that the more wings you have the better. Results were so 'lifty' that I'm sure I would have killed myself if I'd ever ran this car on the circuit here (thank god I never did). City car only and I can't drive faster than 80km/h anywhere without murdering 1.4billion other drivers in front of me anyway :/

Those eBay sellers should really warn idiots (like myself) about the risks LOL
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Old 02-06-2017, 12:31 PM   #20
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Would be interesting to see how the air dam with duck tail stands up

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