Last x Days Posts  1 | 3 | 7 Days  Search  Topics  Tree View  Help
  Soarer Central * Bodywork and Exterior * Aerodynamics! Previous Previous    Next Next  

  Thread Last Poster Posts Pages
Open in new windowArchive through April 20, 2009Joe Russell25 1 
  ClosedClosed: New threads not accepted on this page      

Author Message
Peter Nitschke
Junk Filterer
South Australia
UZZ30 UZZ31

Posts: 10511
Reg: 11-2004

Top of pagePrevious messageNext messageBottom of page Link to this message

Rating: N/A
Votes: 0 (Vote!)

 Monday, April 20, 2009 - 12:43 pm, by:  Peter Nitschke (Pen) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
Ben Lipman wrote on Sunday, April 19, 2009 - 09:16 am:

The area around the front wiper is interesting, and contradicts what many, including me, expected. I thought this area would be low pressure, hence why people remove the rear rubber strip, and cut vents in this area chasing underbonnet cooling.

Keep in mind, that all this shows, is that it is a high pressure area relative to the area around it. The pressure under the bonnet may still be higher meaning that hot air would still flow out.

It really needs a for the pressure difference to be tested.
Joe Russell
TryHard
Marlborough
4.0 V8 GT-L(UZZ31)

Posts: 360
Reg: 10-2008

Top of pagePrevious messageNext messageBottom of page Link to this message

Rating: N/A
Votes: 0 (Vote!)

 Monday, April 20, 2009 - 02:03 pm, by:  Joe Russell (Joe_r) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
Your right Peter, good point.
I'm looking at magnehelic gauges now, that will be able to tell us what's happening, and where best to place vents etc.
Oh and I did a quick estimate of Cda:

191,000 Watts
-----------------------
0.6 x 2.4165Sqm x (74.715m/s^3)

=31.56
Peter Nitschke
Junk Filterer
South Australia
UZZ30 UZZ31

Posts: 10514
Reg: 11-2004

Top of pagePrevious messageNext messageBottom of page Link to this message

Rating: N/A
Votes: 0 (Vote!)

 Monday, April 20, 2009 - 06:22 pm, by:  Peter Nitschke (Pen) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
Joe, if you do another test, see what difference (if any) it makes with the air vents on fresh or recirc.
Joe Russell
TryHard
Marlborough
4.0 V8 GT-L(UZZ31)

Posts: 363
Reg: 10-2008

Top of pagePrevious messageNext messageBottom of page Link to this message

Rating: N/A
Votes: 0 (Vote!)

 Monday, April 20, 2009 - 07:00 pm, by:  Joe Russell (Joe_r) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
Will do
Dave Cazes
TryHard
sa
tt

Posts: 406
Reg: 08-2007

Top of pagePrevious messageNext messageBottom of page Link to this message

Rating: N/A
Votes: 0 (Vote!)

 Tuesday, April 21, 2009 - 11:56 am, by:  Dave Cazes (Cazman) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
Very cool, id love to test stock and vertex front and rear bumpers, to see if the vertex actually scooped more air.
Dave Cazes
TryHard
sa
tt

Posts: 408
Reg: 08-2007

Top of pagePrevious messageNext messageBottom of page Link to this message

Rating: N/A
Votes: 0 (Vote!)

 Tuesday, April 21, 2009 - 12:10 pm, by:  Dave Cazes (Cazman) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
oh and to all the idiots buying these origin roof spoilers, your killing your aero


Ive been wanting to buy one of theses, from an 06 sti

http://www.ravspeconline.com/shop/catalog/product_info.php?products_id=683

In m opinion, they are better tahn vortex generators, and subaru not use them stock instead, while evos are using vortex. Use both maybe, as vortex can be had for under $100
Joe Russell
TryHard
Marlborough
4.0 V8 GT-L(UZZ31)

Posts: 367
Reg: 10-2008

Top of pagePrevious messageNext messageBottom of page Link to this message

Rating: N/A
Votes: 0 (Vote!)

 Tuesday, April 21, 2009 - 01:47 pm, by:  Joe Russell (Joe_r) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
Yea that first one is dumb. 2nd may work, not as well as a full rear wing though, and wouldn't do what vortex generators do id say.
Would be great to test!
Dave Rose
DieHard
wa
uzz31 v8

Posts: 807
Reg: 03-2007

Top of pagePrevious messageNext messageBottom of page Link to this message

Rating: N/A
Votes: 0 (Vote!)

 Tuesday, April 21, 2009 - 06:41 pm, by:  Dave Rose (Sand_groper) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
Dont know to much about this subject,but i felt the rear lip was acting like a scoop after the air had passed over the spare wheel housing, so i fitted this .
I always thought it should be high pressure around heater /air intakes ?(wiper area),keep up the good work Joe.
Upload
Joe Russell
TryHard
Marlborough
4.0 V8 GT-L(UZZ31)

Posts: 372
Reg: 10-2008

Top of pagePrevious messageNext messageBottom of page Link to this message

Rating: N/A
Votes: 0 (Vote!)

 Tuesday, April 21, 2009 - 08:20 pm, by:  Joe Russell (Joe_r) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
Dave how did you affix the panel? It looks like rivets to the wheel well if I'm correct.
I'm thinking of taking out the rubber grommets and using wire ties to hold a panel for testing, likely aluminium.
Yes the area is an intake for vents etc, and yet many people remove the rear rubber strip to lower engine bay temps.
This may work as more air is forced into the rear of the engine bay and down under the car, not by hot air rising out as commonly thought... maybe.
Dave Rose
DieHard
wa
uzz31 v8

Posts: 809
Reg: 03-2007

Top of pagePrevious messageNext messageBottom of page Link to this message

Rating: N/A
Votes: 0 (Vote!)

 Tuesday, April 21, 2009 - 09:17 pm, by:  Dave Rose (Sand_groper) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
Joe it is a piece of stainless ,just cut to fit round the rear lip supports and pushed up then pop riveted to bottom of s/wheel well , i swear its somehow made the car quieter at high speed.
Matchy Loi
TryHard
VIC
GTT

Posts: 258
Reg: 06-2006

Top of pagePrevious messageNext messageBottom of page Link to this message

Rating: N/A
Votes: 0 (Vote!)

 Tuesday, April 21, 2009 - 10:53 pm, by:  Matchy Loi (Ftk148) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
I saw a little diy article in auto salon magazine about cutting the rear bar, which is what i have done. I plan on making a diffuser type thing like what you've done too dave.
Joe Russell
TryHard
Marlborough
4.0 V8 GT-L(UZZ31)

Posts: 374
Reg: 10-2008

Top of pagePrevious messageNext messageBottom of page Link to this message

Rating: N/A
Votes: 0 (Vote!)

 Wednesday, April 22, 2009 - 04:41 am, by:  Joe Russell (Joe_r) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
Makes sence Dave, good job!
Matchy, any pics?
Matchy Loi
TryHard
VIC
GTT

Posts: 260
Reg: 06-2006

Top of pagePrevious messageNext messageBottom of page Link to this message

Rating: N/A
Votes: 0 (Vote!)

 Wednesday, April 22, 2009 - 05:04 pm, by:  Matchy Loi (Ftk148) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
here you go


Upload
Joe Russell
TryHard
Marlborough
4.0 V8 GT-L(UZZ31)

Posts: 375
Reg: 10-2008

Top of pagePrevious messageNext messageBottom of page Link to this message

Rating: N/A
Votes: 0 (Vote!)

 Wednesday, April 22, 2009 - 05:14 pm, by:  Joe Russell (Joe_r) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
Reducing the high pressure air underneath, probably a bit more stable and quieter at high speed?
Thanks for the pic, this is great!
Joe Russell
TryHard
Marlborough
4.0 V8 GT-L(UZZ31)

Posts: 389
Reg: 10-2008

Top of pagePrevious messageNext messageBottom of page Link to this message

Rating: N/A
Votes: 0 (Vote!)

 Sunday, May 03, 2009 - 03:46 pm, by:  Joe Russell (Joe_r) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
Update!(Please excuse the crap photos-new photographer)
I tried out a prototype under tray today.
Here is a picture of the rear without:

Upload

With:

Upload


And...it looks like it did stuff all.
The one tuft under the exhaust does show good flow and separation though, I have another picture confirming this.
I did notice a couple of things-first off, it was really quiet! Very little road noise, even less than before. And another thing which was amazing-my height controller was saying the rear was lower than usual, meaning the car was experiencing less upforce, or more downforce. But the best part of this is I had taken out my spare to fit the tray, and left it out for the run.
This means that even with 15kg less weight in the boot the suspension was further down than usual-I'd call that a very good outcome.
Need to put tufts on the actual tray, at the lowest point.

Next up are the mudflaps.
Front with:

Upload

Without:

Upload

The flow reattached much quicker, that's good! Still turbulent though. Need to put more wool tufts on the black strip to see whats happening further back from the wheel.
Rear with:

Upload

Without (picture one):

Upload

Without (picture two):

Upload

God damn useless photographer... anyway, the flow is better at the bottom, much more attached, but overall more turbulent.
Need better pictures of this area I think.

So, conclusions:
No mudflaps improved(maybe??) flow after the wheels.
The undertray improved flow and downforce, but didn't make the wake visibly smaller-vortex generators may help with this.

Peter, I did the aircon and no aircon tests, but frankly I'm ashamed of the photos.
I can tell you there was no visible difference- pressure testing will need to be done to know what happening there I think.
Evan Kaio
TryHard
Beautiful sunny good @ rugby Wellington
'91 UZZ31

Posts: 413
Reg: 01-2007

Top of pagePrevious messageNext messageBottom of page Link to this message

Rating: N/A
Votes: 0 (Vote!)

 Sunday, May 03, 2009 - 04:11 pm, by:  Evan Kaio (Knave) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
Joe, It's time to build a wind tunnel.
Peter Nitschke
Junk Filterer
South Australia
UZZ30 UZZ31

Posts: 10529
Reg: 11-2004

Top of pagePrevious messageNext messageBottom of page Link to this message

Rating: N/A
Votes: 0 (Vote!)

 Sunday, May 03, 2009 - 09:21 pm, by:  Peter Nitschke (Pen) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
I would love to hear your explanation if the cops pull you over heheh..
Aaron Mead
Goo Roo
NT
Celsior 1UZ-FE Mines, JZZ30 1.5JZ-GTE To4z

Posts: 2289
Reg: 03-2006

Top of pagePrevious messageNext messageBottom of page Link to this message

Rating: N/A
Votes: 0 (Vote!)

 Monday, May 04, 2009 - 12:21 am, by:  Aaron Mead (Aaron) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
Just want to say THANKS JOE for doing these tests and taking the time to post up the results.

Very valuable stuff mate :-)
Mike Beck
Goo Roo
New Zealand
540i E34 V8

Posts: 3505
Reg: 11-2005

Top of pagePrevious messageNext messageBottom of page Link to this message

Rating: N/A
Votes: 0 (Vote!)

 Monday, May 04, 2009 - 02:24 pm, by:  Mike Beck (Gold_40gt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
Joe

but also,


Joe Russell
TryHard
Marlborough
4.0 V8 GT-L(UZZ31)

Posts: 393
Reg: 10-2008

Top of pagePrevious messageNext messageBottom of page Link to this message

Rating: N/A
Votes: 0 (Vote!)

 Monday, May 04, 2009 - 07:23 pm, by:  Joe Russell (Joe_r) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
My thoughts to Mike... lol.
And your all welcome.
Pics of the undertray to follow.
Mike Beck
Goo Roo
New Zealand
540i E34 V8

Posts: 3510
Reg: 11-2005

Top of pagePrevious messageNext messageBottom of page Link to this message

Rating: N/A
Votes: 0 (Vote!)

 Monday, May 04, 2009 - 08:04 pm, by:  Mike Beck (Gold_40gt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
Very good, I look forward to seeing it.
Matthew Tai
TryHard
NSW
JZZNABoB

Posts: 116
Reg: 07-2005

Top of pagePrevious messageNext messageBottom of page Link to this message

Rating: N/A
Votes: 0 (Vote!)

 Saturday, May 09, 2009 - 05:05 pm, by:  Matthew Tai (Matttai) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
This is very interesting!
Here is another aero tuft test done on a 93 civic i found when browsing around. Interesting forum too that might help.

http://www.cleanmpg.com/forums/showthread.php?t=2854
Robert Cranfield
TryHard
NSW
Soarer V8 Limited (UZZ31)

Posts: 125
Reg: 12-2009

Top of pagePrevious messageNext messageBottom of page Link to this message

Rating: N/A
Votes: 0 (Vote!)

 Thursday, April 22, 2010 - 02:23 pm, by:  Robert Cranfield (Robc) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
G'day Joe,

I'm wondering if you've gone any further with your aero experiments?

I have to remove the wipers, intend to remove the external mirrors plus mudflaps and get the front spoiler as close to the ground as possible. I cannot do it here (uneven road surfaces) but will try to get some tufting done on the salt where it's relatively spoiler friendly (flat).

Cheers,
Rob

Add Your Message Here
Eye Candy
Click for full size
Bold text Italics Underline Center Text Upload photo from your hard drive Make a List Make a Table Make an Image Thumbnail Create a hyperlink Insert a clipart image Formatting Help
         

Username: Important Posting Information:
If asking a question, have you done a search to see if your question has already been answered?
Be aware that the use of SMS-speak eg "u" instead of "you" etc, will get your post deleted.
Password:
Enable HTML code in message
Automatically activate URLs in message

  Administration Administration      Log Out Log Out Previous Previous      Next Next