The Subaru SVX World Network   SVX Network Forums
Live Chat!
SVX or Subaru Links
Old Lockers
Photo Post
How-To Documents
Message Archive
SVX Shop Search
IRC users:

Go Back   The Subaru SVX World Network > SVX Main Forums > General SVX Babble

Reply
 
Thread Tools Display Modes
  #16  
Old 05-08-2008, 12:18 AM
drivemusicnow's Avatar
drivemusicnow drivemusicnow is offline
Poor College Racer
 
Join Date: Sep 2002
Location: IL/MI
Posts: 1,522
Send a message via AIM to drivemusicnow
Back in the day someone did some fancy photography of the rear of the car measuring the difference between the height of the rear at speed versus standing still.

If I remember correctly, they calculated something like 100 lbs of downforce at 100mph which is significant.

Plus I agree that it just doesn't look as good without the spoiler.
__________________
Greg

97 Red SVX LSi clean
96 Black SVX LSi beater
90 Red Eclipse GSX track ho
99 Ford F250 work horse
My Locker
Reply With Quote
  #17  
Old 05-08-2008, 12:46 AM
YourConfused YourConfused is offline
Registered User
 
Join Date: Jan 2007
Location: Austin, TX
Posts: 1,276
Quote:
Originally Posted by drivemusicnow View Post
Back in the day someone did some fancy photography of the rear of the car measuring the difference between the height of the rear at speed versus standing still.

If I remember correctly, they calculated something like 100 lbs of downforce at 100mph which is significant.

Plus I agree that it just doesn't look as good without the spoiler.
Can you back this up with a quote, or a thread link? That would be super great, awesome even.

I love ideas but life is better when things can be linked to facts, reason, logic...

Thanks for your time and response to this matter.
__________________
"They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety." Benjamin Franklin


blk 92' LSL w/ average mods

pics here http://s306.photobucket.com/albums/nn277/yourconfused/


Cash68: "Hmm, I wouldn't brag about beating Escorts. That's like saying you tricked a retarded person."

Last edited by YourConfused; 05-08-2008 at 12:50 AM.
Reply With Quote
  #18  
Old 05-08-2008, 06:11 AM
odepaj's Avatar
odepaj odepaj is offline
Killer of threads
 
Join Date: Aug 2004
Location: San Antonio, Texas
Posts: 1,926
Registered SVX
http://www.subaru-svx.net/forum/show...ight=downforce

Post #14. It's still debatable, but I guess we'll never know until someone does some proper testing.
__________________
-Dustin

1992 Ebony LS-L w/191k miles Mods: a few and acouple more

1995 Brilliant Red L/AWD w/154k miles Mods: Stebro catback exhaust, K&N drop in filter, ECUtune ST1v5, 4.44, lots of JDM goodies

1992 Pearly LS-L w/154k miles Sold Mods: 4.11, rust

2008 DGM Legacy spec.B w/245k miles Mods: Cryotune Stage3, VF52, bushings galore, STi pink springs, Bilstein HDs


My Locker

The only man alive who drives three "Subu SVS's".......according to my insurance company
Reply With Quote
  #19  
Old 05-08-2008, 06:47 AM
dcarrb dcarrb is offline
Registered User
 
Join Date: Nov 2003
Location: none
Posts: 3,430
Quote:
Originally Posted by drivemusicnow View Post
If I remember correctly, they calculated something like 100 lbs of downforce at 100mph which is significant.
No way. If the wing were angled with the leading edge lower than the trailing edge, the upward deflection of the airflow would result in downforce applied to the rear of the car. At street speeds you'd need a fairly severe angle to be remotely effective. There is no upward deflection of airflow. There is no "reverse lift" or any other such thing. The wing is a decoration. That's all. And if you like that sort of thing, there's nothing wrong with that.

If you think you need downforce, throw your tools into the trunk, or better yet, keep your gas tank full.

dcb
Reply With Quote
  #20  
Old 05-08-2008, 03:17 PM
SVX-FF's Avatar
SVX-FF SVX-FF is offline
Live it, Love it, Breathe it
 
Join Date: Dec 2003
Location: Manchester Township, PA
Posts: 1,207
Send a message via Yahoo to SVX-FF
Just remember that the SVX that achived the best drag coifiecent had a spoiler. I have moved mine back about 2". tha car is very stable at very high speeds. If I post it the Mods will ban me.

My spolier moved back.



Steve
Attached Images
File Type: jpg wing2.jpg (96.2 KB, 344 views)
__________________
92 SVX AWD 130,000 w/ rebuilt SVX 4.11
97 Audi A4 1.8T (Daily Driver)
03 Ford Expedition(hers)

SVXepidia SVX information warehouse
Are you in?

My Old Locker

A 4.11 Founding Father
"Tranny #6" I really need a manual

Reading IX

[SIGPIC][/SIGPIC]

Ya I was there
Reply With Quote
  #21  
Old 05-08-2008, 10:13 PM
YourConfused YourConfused is offline
Registered User
 
Join Date: Jan 2007
Location: Austin, TX
Posts: 1,276
Quote:
Originally Posted by odepaj View Post
http://www.subaru-svx.net/forum/show...ight=downforce

Post #14. It's still debatable, but I guess we'll never know until someone does some proper testing.
Thanks for using the search button for me.
__________________
"They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety." Benjamin Franklin


blk 92' LSL w/ average mods

pics here http://s306.photobucket.com/albums/nn277/yourconfused/


Cash68: "Hmm, I wouldn't brag about beating Escorts. That's like saying you tricked a retarded person."
Reply With Quote
  #22  
Old 05-08-2008, 10:16 PM
YourConfused YourConfused is offline
Registered User
 
Join Date: Jan 2007
Location: Austin, TX
Posts: 1,276
Quote:
Originally Posted by SVX-FF View Post
Just remember that the SVX that achived the best drag coifiecent had a spoiler. I have moved mine back about 2". tha car is very stable at very high speeds. If I post it the Mods will ban me.

My spolier moved back.



Steve
I think I like it better than the stock spot and would solve the issue of trying to ffill in the holes in the trunk lid. Now I just need to fix all the patches of paint that are falling off.
__________________
"They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety." Benjamin Franklin


blk 92' LSL w/ average mods

pics here http://s306.photobucket.com/albums/nn277/yourconfused/


Cash68: "Hmm, I wouldn't brag about beating Escorts. That's like saying you tricked a retarded person."
Reply With Quote
  #23  
Old 05-08-2008, 11:56 PM
Ownbot's Avatar
Ownbot Ownbot is offline
I'm the anti-do-gooder
 
Join Date: Dec 2007
Location: south of Pittsburgh PA
Posts: 472
Quote:
Originally Posted by dcarrb View Post
No way. If the wing were angled with the leading edge lower than the trailing edge, the upward deflection of the airflow would result in downforce applied to the rear of the car. At street speeds you'd need a fairly severe angle to be remotely effective. There is no upward deflection of airflow. There is no "reverse lift" or any other such thing. The wing is a decoration. That's all. And if you like that sort of thing, there's nothing wrong with that.

If you think you need downforce, throw your tools into the trunk, or better yet, keep your gas tank full.

dcb
wow, someone who actually understands.....we are not talking about a race car here, the "wing" is strictly cosmetic and if you don't believe that, then you are sadly mistaken. Sorry
Reply With Quote
  #24  
Old 05-09-2008, 12:32 AM
YourConfused YourConfused is offline
Registered User
 
Join Date: Jan 2007
Location: Austin, TX
Posts: 1,276
Quote:
Originally Posted by Ownbot View Post
wow, someone who actually understands.....we are not talking about a race car here, the "wing" is strictly cosmetic and if you don't believe that, then you are sadly mistaken. Sorry
so it is angle vs. airfoil then? angle is the only factor? Not going into clean air vs dirty air either? verry simplistic.

Anyway I was just going for more of a actual experience an not a sudo-scientific topic as I doubt anyone here has any real numbers to crunch on this topic.

edit: just took a look at the sppoiiler and it looks to have little if any airfoil shape to it, but I am no expert. So maybe it is mostly for looks, but as others have sugested.........
__________________
"They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety." Benjamin Franklin


blk 92' LSL w/ average mods

pics here http://s306.photobucket.com/albums/nn277/yourconfused/


Cash68: "Hmm, I wouldn't brag about beating Escorts. That's like saying you tricked a retarded person."

Last edited by YourConfused; 05-09-2008 at 12:49 AM.
Reply With Quote
  #25  
Old 05-09-2008, 12:42 AM
kwren's Avatar
kwren kwren is offline
Registered User
 
Join Date: Aug 2006
Location: washington state
Posts: 3,499
That is the opinion...

Quote:
Originally Posted by Ownbot View Post
wow, someone who actually understands.....we are not talking about a race car here, the "wing" is strictly cosmetic and if you don't believe that, then you are sadly mistaken. Sorry
at "our" house! It is just for "cute".

One other marginal value would be the way it works as a body builder if you have to open the trunk often with week trunk struts.

Keith
Reply With Quote
  #26  
Old 05-09-2008, 06:25 AM
dcarrb dcarrb is offline
Registered User
 
Join Date: Nov 2003
Location: none
Posts: 3,430
Quote:
Originally Posted by SVX-FF View Post
Just remember that the SVX that achived the best drag coifiecent had a spoiler.
There's documentation to support this? I'd like to know if my reasoning is flawed.

Seems to me a wingless SVX is aerodynamically cleaner than one with a wing. I'm not an expert and can cite no references, but by definition anything that "spoils" the airflow, well, spoils the airflow.

Any wing of any description on any street car is essentially a "sporty" tack-on.

dcb
Reply With Quote
  #27  
Old 05-09-2008, 06:57 AM
Hocrest's Avatar
Hocrest Hocrest is offline
Freezepop's are Awesome!!!!
Subaru Silver Contributor
 
Join Date: Oct 2003
Location: Pittston, PA
Posts: 5,334
Send a message via AIM to Hocrest
A few years ago when this came up, someone (Chike???) mentioned the idea of using a digital scale with a remote readout. Setting the scale in the trunk, then using blocks to hold the trunk just barely open with the weight on the scale. Then go for a drive and monitor the scale.
__________________
Dave
- 03 Baja - 92 SVX - 86 Brat - 08 OB 3.0
Reply With Quote
  #28  
Old 05-09-2008, 07:40 AM
Alycone's Avatar
Alycone Alycone is offline
Sue isn't really striped
 
Join Date: Sep 2002
Location: Grand Rapids, MI (and Seattle)
Posts: 3,020
I added a stock spoiler to mine, but I like how the bobtails look.

IMO
spoiler = looks like sports car
bobtail = looks like luxury car

I dont like the xtra big tail look
__________________
Still in love with my Subie
Reply With Quote
  #29  
Old 05-09-2008, 07:54 AM
dcarrb dcarrb is offline
Registered User
 
Join Date: Nov 2003
Location: none
Posts: 3,430
A slightly open trunk would alter airflow, and would certainly bounce around. I don't think you'd be able to get any sort of consistent readings.

The purpose of a wing in back is to help plant the rear tires; the more severe the angle, the more downforce. But the penalty is drag. Any race car will run faster without a wing up until the point that the rear wheels begin to lose traction. Not many of us need worry about going fast enough for any of this to matter. Overdrive the car and you can certainly lose the back end in a curve at street legal speeds, but at those speeds our little decorative wing doesn't make one bit of difference. An enormous, steeply raked World of Outlaws wing might. But probably not.

dcb
Reply With Quote
  #30  
Old 05-09-2008, 08:36 AM
RSVX RSVX is offline
Network Design Administrator
 
Join Date: Feb 2002
Location: Boiling Springs, SC
Posts: 4,344
Someone care to open up their R&T guide? Mine is packed away.

I remember reading, *somehere* that the wing/spoiler is indeed, functional.
__________________
Chris
SVX World Network Administrator
-1993 Subaru SVX LS-L, Barcelona Red, #46, 160,000+ Miles (Sold to SomethingElse)
-2011 Toyota Sienna SE, Black, 30,000+ Miles (Swagger Wagon )
-2002 BMW R 1150R ABS, Black, 26,000+ Miles (Daily Driver )
SVX Owner from February 1997 to March 2008
SVX Online Community Member since February 1998
SVX World Network Member since February 2002, Member #520

Life is a game. Play to win.
The world belongs to those who can laugh at it.
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -6. The time now is 03:03 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
© 2001-2015 SVX World Network
(208)-906-1122