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      08-15-2007, 06:08 PM   #1
nechronics
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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 07:16 PM.
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      08-15-2007, 06:24 PM   #2
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keeping
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      08-15-2007, 07:50 PM   #3
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Deleting. Bye bye...
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      08-15-2007, 08:03 PM   #4
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Keeping. Hellooooo!
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      08-15-2007, 09:57 PM   #5
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Spoiler

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Originally Posted by nechronics View Post
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.
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      08-15-2007, 11:16 PM   #6
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Will it cost $0 to delete it? If so I'll keep it and sell it.
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      08-15-2007, 11:20 PM   #7
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keeping
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      08-16-2007, 01:33 AM   #8
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No question...keeping...because deleting meen you couldnīt upgrade the speed from 250km/h to 280km/h...bmw M-GmbH donīt make this upgrade posible without this rear spoiler...
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      08-16-2007, 01:50 AM   #9
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^^^interesting. I wonder if BMW (US/Canada) has this option...
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      08-16-2007, 04:27 AM   #10
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keeps...
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      08-16-2007, 05:00 AM   #11
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Quote:
Originally Posted by Uli_HH View Post
No question...keeping...because deleting meen you couldnīt upgrade the speed from 250km/h to 280km/h...bmw M-GmbH donīt 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"!)...
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      08-16-2007, 05:49 AM   #12
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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 View Post
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"!)...
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      08-16-2007, 06:13 AM   #13
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Quote:
Originally Posted by 13eastie View Post
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.
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      08-16-2007, 07:12 AM   #14
Uli_HH
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The 280km/h "M-Driver"option doesnīt meen delimited - they only increase the limit, because the M5 could reach 305km/h with this option and they wonīt hurt the bigger car (and sales).
According to my dealer fully delimited 310km/h are posible. Also he claims that the M-driver option wouldnīt be installed as soon as the car is more than 2000km old.
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      08-16-2007, 08:10 AM   #15
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definitely keeping here...in fact I really like the spoiler...gives it a nice and sporty touch to the car imo
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      08-16-2007, 08:43 AM   #16
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Replacing...!

I will replace mine with a carbon fiber replica..!
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      08-16-2007, 09:41 AM   #17
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Quote:
Originally Posted by schnell325 View Post
^^^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.
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      08-16-2007, 09:44 AM   #18
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Quote:
Originally Posted by Garrett View Post
Replacing...!

I will replace mine with a carbon fiber replica..!
Could this be similar to the current E46 CSL, one piece CF...
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      08-16-2007, 10:28 AM   #19
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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.
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      08-16-2007, 11:35 AM   #20
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Originally Posted by gtb75 View Post
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
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      08-16-2007, 12:52 PM   #21
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Quote:
Originally Posted by GregW / Oregon View Post
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.
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      08-16-2007, 01:01 PM   #22
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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
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