Are you keeping spoiler or not?

nechronics · 08-15-2007, 07:08 PM

Keeping or deleting the rear spoiler?

I haven't decided yet

DonM3 · 08-15-2007, 07:24 PM

keeping

RandyB · 08-15-2007, 08:50 PM

Deleting. Bye bye...

normtrum · 08-15-2007, 09:03 PM

Keeping. Hellooooo!

GregW / Oregon · 08-15-2007, 10:57 PM

Quote:

Originally Posted by nechronics

Keeping or deleting the rear spoiler?

I'm deleting...

Keeping--it is so small it's not a maor design element, but it does clean up the airflow and reduce some drag at speed.

jtown · 08-16-2007, 12:16 AM

Will it cost $0 to delete it? If so I'll keep it and sell it.

jpm3 · 08-16-2007, 12:20 AM

keeping

Uli_HH · 08-16-2007, 02:33 AM

No question...keeping...because deleting meen you couldn´t upgrade the speed from 250km/h to 280km/h...bmw M-GmbH don´t make this upgrade posible without this rear spoiler...

schnell325 · 08-16-2007, 02:50 AM

^^^interesting. I wonder if BMW (US/Canada) has this option...

m_bazeepaymon · 08-16-2007, 05:27 AM

keeps...

13eastie · 08-16-2007, 06:00 AM

Quote:

Originally Posted by Uli_HH

No question...keeping...because deleting meen you couldn´t upgrade the speed from 250km/h to 280km/h...bmw M-GmbH don´t make this upgrade posible without this rear spoiler...

I had heard this too, although my dealer was unable to confirm the availability of the "M-Driver" option (as I believe it is called).

Has anyone seen evidence of the availability of this option?

In any case, the "Gurney flap" is pretty inoffensive (cf. "Powerdome"!)...

DonM3 · 08-16-2007, 06:49 AM

yeh I've seen it.... I think it was on german option list thread a couple months ago..... also remember reading that if you get the spoiler removed you cant have it delimited.......

Anyway, dont you have to have some sort of race license to get it delimited or am I chatting rubbish.....

Quote:

Originally Posted by 13eastie

I had heard this too, although my dealer was unable to confirm the availability of the "M-Driver" option (as I believe it is called).

Has anyone seen evidence of the availability of this option?

In any case, the "Gurney flap" is pretty inoffensive (cf. "Powerdome"!)...

Pidef · 08-16-2007, 07:13 AM

Quote:

Originally Posted by 13eastie

I had heard this too, although my dealer was unable to confirm the availability of the "M-Driver" option (as I believe it is called).

Has anyone seen evidence of the availability of this option?

In any case, the "Gurney flap" is pretty inoffensive (cf. "Powerdome"!)...

For sure it's available here in Switzerland, I took it. Will be delivered end of October.

Uli_HH · 08-16-2007, 08:12 AM

The 280km/h "M-Driver"option doesn´t meen delimited - they only increase the limit, because the M5 could reach 305km/h with this option and they won´t hurt the bigger car (and sales).
According to my dealer fully delimited 310km/h are posible. Also he claims that the M-driver option wouldn´t be installed as soon as the car is more than 2000km old.

aloha03gs · 08-16-2007, 09:10 AM

definitely keeping here...in fact I really like the spoiler...gives it a nice and sporty touch to the car imo

Garrett · 08-16-2007, 09:43 AM

Replacing...!

I will replace mine with a carbon fiber replica..!

GregW / Oregon · 08-16-2007, 10:41 AM

Quote:

Originally Posted by schnell325

^^^interesting. I wonder if BMW (US/Canada) has this option...

They haven't offered speed delimiting in the US before, at least on the 3-Series. And yes, spoiler deletion will almost certainly be a no cost/no credit option.

jpm3 · 08-16-2007, 10:44 AM

Quote:

Originally Posted by Garrett

Replacing...!

I will replace mine with a carbon fiber replica..!

Could this be similar to the current E46 CSL, one piece CF...

gtb75 · 08-16-2007, 11:28 AM

As much as I don't like the look, I'll probably end up keeping it... I'd guess the M3 front clip generates additional downforce, so I'm guessing the rear lip spoiler is there to keep things equal.

GregW / Oregon · 08-16-2007, 12:35 PM

Quote:

Originally Posted by gtb75

As much as I don't like the look, I'll probably end up keeping it... I'd guess the M3 front clip generates additional downforce, so I'm guessing the rear lip spoiler is there to keep things equal.

It's to minimize the Caonda effect. It reduces drag and maybe slightly uplift. It's too small to produce downforce.

But, it should have a slight effect on mileage at speed and top speed. Henri Coanda was an Italian aerodynamacist that discovered this. See pages 137 - 138 of the 7/01 Road & Track. There's a diagram of a spoiler exactly like the M3s showing the effect.

See also: http://en.wikipedia.org/wiki/Coanda_Effect

lucid · 08-16-2007, 01:52 PM

Quote:

Originally Posted by GregW / Oregon

It's to minimize the Caonda effect. It reduces drag and maybe slightly uplift. It's too small to produce downforce.

But, it should have a slight effect on mileage at speed and top speed. Henri Coanda was an Italian aerodynamacist that discovered this. See pages 137 - 138 of the 7/01 Road & Track. There's a diagram of a spoiler exactly like the M3s showing the effect.

See also: http://en.wikipedia.org/wiki/Coanda_Effect

Yep, there is no way that little plastic spoiler can create significant downforce; little surface area and not a structural component. It's mainly there to manage the flow. Turbulance/undesired pressure differences are not good things in general unless you are young and stupid like I was 15 years ago and got a kick out of riding a bicycle behind trucks at 120kph on highways.

gtb75 · 08-16-2007, 02:01 PM

Cool info - definitely didn't know that... I thought it would be similar to what a Gurney Flap does, but in looking at Coanda info, you're probably right. Here's some Gurney Flap info for those who aren't familiar with the tech: http://www.insideracingtechnology.com/tech104gurney.htm and http://www.allamericanracers.com/gurney_flap.html

Either way, I'm sure it's a functional piece which BMW didn't just put there for looks, so I won't be removing it

08-15-2007, 07:08 PM	#1
nechronics Lieutenant Drives: M3 Join Date: May 2007 Location: south tampa Posts: 438 iTrader: (0)	Are you keeping spoiler or not? Keeping or deleting the rear spoiler? I haven't decided yet Last edited by nechronics; 10-13-2007 at 08:16 PM.
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08-15-2007, 09:03 PM	#4
normtrum Colonel Drives: e90 335i, e46 330i Join Date: Feb 2007 Location: PNW Posts: 2,237 iTrader: (1)	Keeping. Hellooooo! __________________ 07 335i sedan \| Steptronic \| Black saphire \| Terra \| ZPP \| ZSP \| Cold Weather \| CA \| PDC \| Nav \| OEM Alarm

08-16-2007, 12:20 AM	#7
jpm3 Private First Class Drives: (sold) 02 E46 M3 Avus Blau Join Date: Nov 2006 Location: O-Town, FL Posts: 69 iTrader: (0)	keeping __________________ Sold - 2002 E46 M3 Avus Blue

08-16-2007, 05:27 AM	#10
m_bazeepaymon Major Drives: 2008 E92 335i Join Date: Sep 2006 Location: Los Angeles Posts: 1,077 iTrader: (4)	keeps... __________________ ZzZzZ'er

08-16-2007, 09:10 AM	#15
aloha03gs Private Drives: Lexus GS Join Date: Aug 2007 Location: Honolulu, Hawaii Posts: 49 iTrader: (0)	definitely keeping here...in fact I really like the spoiler...gives it a nice and sporty touch to the car imo __________________ "imitation is the greatest form of flattery"

08-15-2007, 07:24 PM	#2
DonM3 Captain Drives: AW e92 M3 Join Date: Mar 2007 Location: London Posts: 629 iTrader: (1)	keeping

08-15-2007, 08:50 PM	#3
RandyB Lieutenant Colonel Drives: '03 330i, '09 M3 Coupe Join Date: Feb 2007 Location: Texas Posts: 1,504 iTrader: (0)	Deleting. Bye bye...

08-16-2007, 12:16 AM	#6
jtown Lieutenant Drives: TBD Join Date: Sep 2006 Location: Norcal Posts: 596 iTrader: (0)	Will it cost $0 to delete it? If so I'll keep it and sell it.

08-16-2007, 02:33 AM	#8
Uli_HH First Lieutenant Drives: AW M3 E90)/ 523i Touring Join Date: Nov 2005 Location: Hamburg Germany Posts: 348 iTrader: (0)	No question...keeping...because deleting meen you couldn´t upgrade the speed from 250km/h to 280km/h...bmw M-GmbH don´t make this upgrade posible without this rear spoiler...

08-16-2007, 02:50 AM	#9
schnell325 The only E9x M3 in Northern BC..therefore I'm cool Drives: '92 325i,'08 M3,'11 335xi Join Date: Aug 2007 Location: BC Posts: 2,300 iTrader: (3)	^^^interesting. I wonder if BMW (US/Canada) has this option...

08-16-2007, 08:12 AM	#14
Uli_HH First Lieutenant Drives: AW M3 E90)/ 523i Touring Join Date: Nov 2005 Location: Hamburg Germany Posts: 348 iTrader: (0)	The 280km/h "M-Driver"option doesn´t meen delimited - they only increase the limit, because the M5 could reach 305km/h with this option and they won´t hurt the bigger car (and sales). According to my dealer fully delimited 310km/h are posible. Also he claims that the M-driver option wouldn´t be installed as soon as the car is more than 2000km old.

08-16-2007, 09:43 AM	#16
Garrett Banned Drives: 2004 330ci Join Date: Nov 2005 Location: Mich Posts: 1,356 iTrader: (0)	Replacing...! I will replace mine with a carbon fiber replica..!

08-16-2007, 11:28 AM	#19
gtb75 Private Drives: 2006 Corvette Z06 Join Date: Jan 2007 Location: IL, USA Posts: 97 iTrader: (0)	As much as I don't like the look, I'll probably end up keeping it... I'd guess the M3 front clip generates additional downforce, so I'm guessing the rear lip spoiler is there to keep things equal. __________________ 2006 Corvette Z06 Black / Ebony - 459RWHP / 438RWTQ 2005 Subaru Legacy 2.5 GT Wagon Brilliant Silver / Tweed M5 - 229AWHP / 260AWTQ

08-16-2007, 02:01 PM	#22
gtb75 Private Drives: 2006 Corvette Z06 Join Date: Jan 2007 Location: IL, USA Posts: 97 iTrader: (0)	Cool info - definitely didn't know that... I thought it would be similar to what a Gurney Flap does, but in looking at Coanda info, you're probably right. Here's some Gurney Flap info for those who aren't familiar with the tech: http://www.insideracingtechnology.com/tech104gurney.htm and http://www.allamericanracers.com/gurney_flap.html Either way, I'm sure it's a functional piece which BMW didn't just put there for looks, so I won't be removing it __________________ 2006 Corvette Z06 Black / Ebony - 459RWHP / 438RWTQ 2005 Subaru Legacy 2.5 GT Wagon Brilliant Silver / Tweed M5 - 229AWHP / 260AWTQ