Boxster 986 Aerodynamics @180km/hr - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Nine8Six · 02-06-2017, 03:12 AM

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

Luckyed · 02-06-2017, 04:02 AM

Very cool.......Lots of red over the roof.
Quite interesting.

itsnotanova · 02-06-2017, 04:24 AM

I'd like to see it with the spoiler up

NewArt · 02-06-2017, 04:31 AM

Quote:

Originally Posted by itsnotanova

I'd like to see it with the spoiler up

Yes, I thought the same!

Nine8Six · 02-06-2017, 04:53 AM

Quote:

Originally Posted by itsnotanova

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

Nine8Six · 02-06-2017, 05:01 AM

Passenger NOT allowed until further notice

Great little city-car other than that - if kept <100km/hr LOLLL

steved0x · 02-06-2017, 06:06 AM

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...

Nine8Six · 02-06-2017, 06:23 AM

Quote:

Originally Posted by steved0x

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?

JayG · 02-06-2017, 08:04 AM

Nastran?
You love playing for CFD, don't you LOL

Nine8Six · 02-06-2017, 08:51 AM

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?

The Radium King · 02-06-2017, 09:24 AM

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?

Nine8Six · 02-06-2017, 09:36 AM

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

78F350 · 02-06-2017, 09:45 AM

Quote:

Originally Posted by steved0x

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...

Quote:

Originally Posted by Nine8Six

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.

steved0x · 02-06-2017, 09:58 AM

Quote:

Originally Posted by 78F350

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

JayG · 02-06-2017, 10:09 AM

Go with BlipShift

steved0x · 02-06-2017, 10:56 AM

Quote:

Originally Posted by JayG

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

PaulE · 02-06-2017, 11:01 AM

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.

JayG · 02-06-2017, 11:41 AM

Quote:

Originally Posted by steved0x

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

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?

Nine8Six · 02-06-2017, 11:57 AM

Quote:

Originally Posted by steved0x

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

hmmm, well spotted

Quote:

Originally Posted by JayG

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

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

Fintro11 · 02-06-2017, 01:31 PM

Would be interesting to see how the air dam with duck tail stands up