ZPOST
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read


Go Back   ZPOST > BMW Z4 Roadster and Coupe > BMW Z4 Photos, Photoshops, Videos and other Media
  TireRack

SUPPORT ZPOST BY DOING YOUR TIRERACK SHOPPING FROM THIS BANNER, THANKS!
Post Reply
 
Thread Tools Search this Thread
      06-02-2011, 11:28 PM   #23
boydgti
First Lieutenant
boydgti's Avatar
5
Rep
320
Posts

 
Drives: 2007 z4m
Join Date: May 2010
Location: calgary alberta

iTrader: (0)

Wow im surprised
Appreciate 0
      06-03-2011, 09:51 AM   #24
JCz04Bimmer
Captain
JCz04Bimmer's Avatar
10
Rep
606
Posts

 
Drives: 06 Z4MC
Join Date: Feb 2008
Location: New York City

iTrader: (2)

Big fan! Is there any ability to have the wing sit lower? By maybe 4-6 inches?

My car is about as track prepped as you can get -- half-cage, harnesses, race buckets, etc -- but I still think having a big wing like that on the street (yes, I do drive on the street) is a bit out of place. On the track, AWESOME. Motoring around city streets, meh...
__________________
|www.onehotlap.com|Real People|Real Cars|
Appreciate 0
      06-03-2011, 09:59 AM   #25
GrayZ4C
Enlisted Member
United_States
1
Rep
37
Posts

 
Drives: 2007 Z4 coupe
Join Date: Apr 2011
Location: south Florida

iTrader: (0)

Great for the track but I think a little big for the road.
Appreciate 0
      06-03-2011, 04:18 PM   #26
The HACK
Garland Operator 7G
The HACK's Avatar
41
Rep
3,482
Posts

 
Drives: 2006 MZ4C, 2013 Veloster Turbo
Join Date: Oct 2007
Location: Welcome to Jamaica have a nice day

iTrader: (1)

Quote:
Originally Posted by Finnegan View Post
Really? On a track prepped car like this one that actually sees the track?

I agree that on a street car it looks plain silly and downright comedic, but if you're serious about tracking a functional splitter and wing provide some documented benefits (seen here with forum member's track times and entrance/exit speeds through corners).
I have yet to experience the need for any significant aero work on this car and I've seen north of 145mph on the banked portion of California Speedway.

IMO (here we go again), unless there are significant weight reduction from both ends, this car does not need aerodynamic aid since the drag will reduce the available HP, and at 330 you're going to need every HP you've got to move 3,400+ lbs (trust me, unless you weight 120 lbs, the car is going to be over 3,400+ lbs). Club racers that ran any sort of significant wing(s) like this typically weight in at around 2,600 lbs or less with driver, and has enough power AND grip to require down-force.

Frankly, these wings on anything outside of cars modified for competition, are mostly for looks only. Very few will be going at 90mph+ through a turn only to find that their car is too light to have any significant grip on either end.
__________________
Quote:
No way I'd ever take my BMW to the track.
Quote:
Then why do you have $3,000 worth of suspension mods on your car?
Quote:
...
-Overheard at the last B****rfest.
Appreciate 0
      06-03-2011, 04:28 PM   #27
boydgti
First Lieutenant
boydgti's Avatar
5
Rep
320
Posts

 
Drives: 2007 z4m
Join Date: May 2010
Location: calgary alberta

iTrader: (0)

Thats what I was thinking also
Appreciate 0
      06-03-2011, 05:17 PM   #28
beta
Lieutenant Colonel
28
Rep
1,655
Posts

 
Drives: 2006 M Roadster
Join Date: Mar 2011
Location: CA

iTrader: (2)

Quote:
Originally Posted by JCz04Bimmer View Post
Big fan! Is there any ability to have the wing sit lower? By maybe 4-6 inches?
Check out the Varis hyper narrow wing, it sits much lower.

Hack, how do you feel about front splitters?
__________________
Appreciate 0
      06-03-2011, 06:53 PM   #29
Caddyshk
M = Midlife Crisis
Caddyshk's Avatar
Canada
21
Rep
1,920
Posts

 
Drives: 2006 Z4MC Interlagos
Join Date: May 2007
Location: Oak Ridges, Ontario, Canada

iTrader: (0)

Quote:
Originally Posted by boydgti View Post
Thats what I was thinking also
X3
__________________
2006 Z4MC - #LL93158
SuperSprint Race Cans, RE X Pipe, Fabspeed Headers, OE STB, AS Shifter, Dave Z Modified CDV, Ground Control Coil Overs, Stoptech lines, Hawk DTC Pads, RE Clutch Stop, RE Transmission Mounts, Vibra-Technics Engine Mounts, ZHP Shift Knob, LeatherZ M Shift Boot, Tekarbon Rear Spoiler, CF Grills, Advan RS DGM
Appreciate 0
      06-04-2011, 12:02 AM   #30
The HACK
Garland Operator 7G
The HACK's Avatar
41
Rep
3,482
Posts

 
Drives: 2006 MZ4C, 2013 Veloster Turbo
Join Date: Oct 2007
Location: Welcome to Jamaica have a nice day

iTrader: (1)

Quote:
Originally Posted by beta View Post
Hack, how do you feel about front splitters?
Again, it's simple. At 3,200 lbs these cars don't have any significant need for down-force. There's not enough lift on either end at speed to really have the need.

Where any form of splitter/endplate/giant wing will come in handy, is when you're competing with a heavily modified car with a lot of weight reduction AND fat ss tires. When you have this particular combination, like 500-600 lbs removed from this car, with a ton of power, you CAN and will experience loss of traction and some of that negative effect of aerodynamics causing loss of grip (since less weight = less grip).

In practical terms? They're useless for 99.9% of the population. Heck they're probably useless unless you get to the Modified class in BMW CCA Club Race, or some of the "unlimited" classes where massive weight reductions are allowed with CF panels and lexan glasses and completely stripped cars. However, with a front splitter, there IS less drag penalty compared to giant rear wings, so you'll see a lot of Prepared class cars run them because, well, every bit of added grip helps. So if we're strictly talking about the splitters up front, or extended end plates, they're certainly more helpful than full-on wings.

But they (wings and splitters) sure look good. I'd rock it whether or not they improve my lap times.
__________________
Quote:
No way I'd ever take my BMW to the track.
Quote:
Then why do you have $3,000 worth of suspension mods on your car?
Quote:
...
-Overheard at the last B****rfest.
Appreciate 0
      06-04-2011, 12:48 AM   #31
arggg45
Second Lieutenant
No_Country
3
Rep
245
Posts

 
Drives: fairly quickly.
Join Date: Oct 2010
Location: finding the end of the road

iTrader: (0)

Garage List
I'm not looking to get into a pissing match here, but I kinda have to take issue with a few of your points, on both an academic and practical sense. I agree with you that most people don't need aero on their cars, but that said, some of your points are sweeping generalizations, and distract from what I think you are trying to get at.

Quote:
Originally Posted by The HACK View Post
Again, it's simple. At 3,200 lbs these cars don't have any significant need for down-force. There's not enough lift on either end at speed to really have the need.

Where any form of splitter/endplate/giant wing will come in handy, is when you're competing with a heavily modified car with a lot of weight reduction AND fat ss tires. When you have this particular combination, like 500-600 lbs removed from this car, with a ton of power, you CAN and will experience loss of traction and some of that negative effect of aerodynamics causing loss of grip (since less weight = less grip).

In practical terms? They're useless for 99.9% of the population. Heck they're probably useless unless you get to the Modified class in BMW CCA Club Race, or some of the "unlimited" classes where massive weight reductions are allowed with CF panels and lexan glasses and completely stripped cars. However, with a front splitter, there IS less drag penalty compared to giant rear wings, so you'll see a lot of Prepared class cars run them because, well, every bit of added grip helps. So if we're strictly talking about the splitters up front, or extended end plates, they're certainly more helpful than full-on wings.

But they (wings and splitters) sure look good. I'd rock it whether or not they improve my lap times.
The proper application of downforce, in street and race cars, isn't necessarily implemented to negate lift. It is often used as a tuning mechanism to open up other tuning options, i.e. shock valving and settings, spring rates, swaybar stiffness, etc.

As someone with a fairly in-depth knowledge of car setup and tuning, the tuning options available to a car with aero greatly outweigh the options of a car without. Especially because once you start spending the money to get a functional wing (APR, Voltex, Varis, etc) you can always change the AOA of the wing.
__________________
"It will not have enough power until I can spin the wheels at the end of a long straight in top gear."
-Mark Donohue
Appreciate 0
      06-11-2011, 04:55 PM   #32
Endless619
DHS
Endless619's Avatar
Spain
54
Rep
3,930
Posts

 
Drives: 2014 Range Rover Black Edition
Join Date: Oct 2010
Location: Disneyland

iTrader: (14)

Garage List
Not really a fan of the huge wing but if it actually serves a purpose then I give a thumbs up.

I am finally able to see a black Z4M with black TE37s and must say I do not like the look at all. Not trying to be a jerk but I had not seen one lowered and I almost bought a set and will not be buying a set now. CE28s look a lot better on this car IMO.

Thanks for the pictures.
Appreciate 0
      06-18-2011, 01:46 AM   #33
Platfawrm
Banned
United_States
1
Rep
48
Posts

 
Drives: M3
Join Date: May 2011
Location: Los Angeles, CA

iTrader: (0)

Quote:
Originally Posted by JCz04Bimmer View Post
Big fan! Is there any ability to have the wing sit lower? By maybe 4-6 inches?

My car is about as track prepped as you can get -- half-cage, harnesses, race buckets, etc -- but I still think having a big wing like that on the street (yes, I do drive on the street) is a bit out of place. On the track, AWESOME. Motoring around city streets, meh...
Yes we can order shorter stands so the wing does not sit as high up.

PM me for more details.

Quote:
Originally Posted by GrayZ4C View Post
Great for the track but I think a little big for the road.
Smaller profile/shorter wing stands are available.

Quote:
Originally Posted by The HACK View Post
I have yet to experience the need for any significant aero work on this car and I've seen north of 145mph on the banked portion of California Speedway.

IMO (here we go again), unless there are significant weight reduction from both ends, this car does not need aerodynamic aid since the drag will reduce the available HP, and at 330 you're going to need every HP you've got to move 3,400+ lbs (trust me, unless you weight 120 lbs, the car is going to be over 3,400+ lbs). Club racers that ran any sort of significant wing(s) like this typically weight in at around 2,600 lbs or less with driver, and has enough power AND grip to require down-force.

Frankly, these wings on anything outside of cars modified for competition, are mostly for looks only. Very few will be going at 90mph+ through a turn only to find that their car is too light to have any significant grip on either end.
Club racers don't run crazy aero b/c they have class rules to follow by. I don't understand why BMW track guys compare to chassis/aero/suspension setup to a club racer car. Their cars are built to run in each class, that is why there isn't huge aero, and suspensions with external reserviors are not allow. If your aero argument is valid then no one should run Moton/JRZ external reservoirs since club racers don't?

If you look at time attack cars they all run as much aero as allowed in their classing, even in street class where the contenders are privateers with low budgets. Aero is effective regardless of the power output, your cornering speeds are faster, thus you carry more speed throughout the whole track. A good example is a Honda S2000's with ~190whp turning 1:57's on street tires at BW CW13.

A wing/splitter setup on my 3300lb M3 at 280whp gained me roughly 5 seconds at BW CW13, same tires/brakes/driver.

The argument of weight/power vs drag maybe valid on a long straight but even then it would be a coin flip since with aero your cornering speeds are higher so upon corner exit the aero equipped car will be at a higher speed.


Quote:
Originally Posted by beta View Post
Check out the Varis hyper narrow wing, it sits much lower.

Hack, how do you feel about front splitters?
Varis hyper narrow is also produced by Voltex, its also much cheaper than the Varis units.

All Varis does is make stands/mounts for cars and they label it theirs.
Appreciate 0
      10-31-2011, 04:13 PM   #34
DroZee4
Bmw Junglist
DroZee4's Avatar
United_States
0
Rep
27
Posts

 
Drives: 03 Z4 2.5I Sport Package
Join Date: Oct 2011
Location: Atlantic City,New Jersey

iTrader: (0)

Send a message via AIM to DroZee4 Send a message via Skype™ to DroZee4
Quote:
Originally Posted by tekmoe View Post
I would have gone bigger.



Appreciate 0
      11-03-2011, 01:44 PM   #35
Nhopkins1394
Accountant, 1st Class
Nhopkins1394's Avatar
United_States
2
Rep
237
Posts

 
Drives: 2006 Z4 3.0si Roadster, Black
Join Date: Jul 2010
Location: Irving, TX where the Cowboys used to play!

iTrader: (0)

Winged ///M

No no no no head lowered shaking head back and forth no no no no
__________________
"I was always told if you drive a roadster with the roof up, the storm outside better have a name", Mikedav, UK
Appreciate 0
      11-11-2011, 01:14 AM   #36
ANILE8
Lieutenant
ANILE8's Avatar
Australia
17
Rep
511
Posts

 
Drives: Z4 M Coupé - Carbon Black
Join Date: Mar 2008
Location: Melbourne, Australia

iTrader: (0)

Just when I thought I had seen it all.

When do you turn 21?
__________________


StopTech Trophy Sport STR-60 380x32mm / StopTech Trophy Sport STR-40 355x32mm | Bridgestone RE-11 | ADV.1 | CDV Delete | TMS Front Camber Kit | TMS Rear Camber Arms | RE Diablo's
Appreciate 0
      11-29-2011, 05:32 PM   #37
flat_out
Private First Class
2
Rep
124
Posts

 
Drives: Z4MC
Join Date: Oct 2009
Location: UK

iTrader: (2)

wing seems slightly on the high side IMHO - i'd go lower...

nice work though..
Appreciate 0
      12-12-2011, 09:55 PM   #38
esqu1re
Lieutenant Colonel
esqu1re's Avatar
23
Rep
1,858
Posts

 
Drives: M Coupe
Join Date: Jul 2010
Location: East Coast

iTrader: (0)

That looks mean, dude. NiCE>
__________________


///M Coupe: RPI Scoop, OE Strut, CDV, Volk RE30, SS Brake Lines, Stromung Exhaust
Appreciate 0
      12-14-2011, 05:41 AM   #39
EastFriesian
New Member
Germany
0
Rep
9
Posts

 
Drives: Infinitas Supercharger SK I
Join Date: Mar 2011
Location: Leer, Lower Saxony

iTrader: (0)

Awesome look, how i hate the german TÜV (mean guys who say "no" to every parts which look nice).
But why is there a german license plate under the american? Big mistake to sell your car with your license plate :/
Appreciate 0
Post Reply

Bookmarks

Tags
aerodynamics, platte forme a.g., platteforme, splitter

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 -5. The time now is 10:13 PM.




zpost
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST