CF roof for M Coupe

F87LUV · 08-31-2007, 10:47 AM

Quote:

Originally Posted by Dammmittt

Ewwwww.

ohh shhhhhhhhh you wouldnt even know the diff :mad:

Dammmittt · 08-31-2007, 10:59 AM

Cool...I guess I'll have to put it on a lift and check it out some time.

Dammmittt · 08-31-2007, 10:59 AM

Quote:

Originally Posted by ZGirl4U

ohh shhhhhhhhh you wouldnt even know the diff :mad:

But you would...don't do that to your poor bimmer!

F87LUV · 08-31-2007, 11:05 AM

Quote:

Originally Posted by Dammmittt

But you would...don't do that to your poor bimmer!

i cant even decide if i wanna tint my windows let alone add aggressive styling

Dammmittt · 08-31-2007, 11:20 AM

Choices choices...

Palantirion · 08-31-2007, 02:39 PM

Quote:

Originally Posted by ZGirl4U

i cant even decide if i wanna tint my windows let alone add aggressive styling

-Yes, you want to tint your windows. Every car ever made looks better with tint, and it keep the car cooler and is better for your eyes.

IQ-Man · 08-31-2007, 05:06 PM

Quote:

Originally Posted by Waldorf

our cars are equipped with some serious downforce equipment under them. from the front to the back. it's fantastic.

it's the only way it sticks to the road so well at such high speeds. very much like a Ferrari, the top of the car is shaped to reduce drag and the underside is equipped with downforce (air rails) equipment to pull it down. very effective.

sorry, but this is a little overstated. the aerodynamic efficiency of a z4 isn't the best. every porsche works better at it. and to ferrari it is no comparison. by the way... every bmw sedan is easier to drive at top speed. the z4 feels very nervous. I speak about speeds above ~130mph.... a daily experience here...

Dammmittt · 08-31-2007, 05:52 PM

Quote:

Originally Posted by IQ-Man

sorry, but this is a little overstated. the aerodynamic efficiency of a z4 isn't the best. every porsche works better at it. and to ferrari it is no comparison. by the way... every bmw sedan is easier to drive at top speed. the z4 feels very nervous. I speak about speeds above ~130mph.... a daily experience here...

I'd agree with that. Although you can feel the pressure increasing on the inside of the car as you pass about 140, it does get twitchy especially over any small bumps or expansion joints on the autobahn, even with sport mode on. (I don't think I read all of waldorf's post)

However, I will say that the coupe does a much better job aerodynamically than the roadster.

F87LUV · 08-31-2007, 06:11 PM

Ok i just did it!! Im not very happy with the job though!!

z3speed4me · 08-31-2007, 06:41 PM

Quote:

Originally Posted by IQ-Man

why don't you try the original bmw diffuser?

is there an ///M version of that? that one only has one opening, and where do you order that, ive never seen it before!

Quote:

Originally Posted by ZGirl4U

Ok i just did it!! Im not very happy with the job though!!

just did what? the overlay?

F87LUV · 08-31-2007, 06:59 PM

Quote:

Originally Posted by z3speed4me

is there an ///M version of that? that one only has one opening, and where do you order that, ive never seen it before!

just did what? the overlay?

oh no... tint... the teflon on the side of the windows makes it looked fn retarded... my ocd is taking over... i dunno what im gonna do..

rimblas · 08-31-2007, 09:03 PM

Quote:

Originally Posted by IQ-Man

sorry, but this is a little overstated. the aerodynamic efficiency of a z4 isn't the best. every porsche works better at it. and to ferrari it is no comparison. by the way... every bmw sedan is easier to drive at top speed. the z4 feels very nervous. I speak about speeds above ~130mph.... a daily experience here...

The M Roadster and M Coupe are different to the regular Z4. They work hard at keeping them as flat as possible. Mine is still very stable at 145 and I've driving a high speed turn at the track at 120 - 125mph and is more planted than the E46 sedan I've driven and other student cars I've driven.

The diffuser does work at sucking the car down and I guess other components do the same.

My M Coupe is more "planted" and feels more stable the faster you go.

Dammmittt · 08-31-2007, 11:34 PM

Quote:

Originally Posted by rimblas

The M Roadster and M Coupe are different to the regular Z4. They work hard at keeping them as flat as possible. Mine is still very stable at 145 and I've driving a high speed turn at the track at 120 - 125mph and is more planted than the E46 sedan I've driven and other student cars I've driven.

The diffuser does work at sucking the car down and I guess other components do the same.

My M Coupe is more "planted" and feels more stable the faster you go.

Than you haven't gone fast enough.

IQ-Man · 09-01-2007, 01:56 AM

Quote:

Originally Posted by rimblas

The M Roadster and M Coupe are different to the regular Z4. They work hard at keeping them as flat as possible. Mine is still very stable at 145 and I've driving a high speed turn at the track at 120 - 125mph and is more planted than the E46 sedan I've driven and other student cars I've driven.

The diffuser does work at sucking the car down and I guess other components do the same.

My M Coupe is more "planted" and feels more stable the faster you go.

The Z4Ms are just as nervous as the normal Z4s. Sorry guy, but you're wrong. It's all the same. And there is nothing "sucking" down... the Z4 produces lot's of buoyant force (roadster AND coupe).

I'm sure it's much more stable than the most american cars (with exception of the new corvette z06)... but in comparison to a good sedan (e46, e90... dc c-class.. audi a4) in a Z4 you have more stress one the Autobahn.

This is not cause of the aerodynamics... it's just a tribute to the good handling. The aerodynamic components are "german standard". And a good diffuser would not even work... cause the underbody isn't cladded enough. A Ferrari is an other world

Palantirion · 09-01-2007, 09:51 PM

The shorter wheelbase of the Z4 would make it a little less stable than a sedan, or even a 3 series coupe - all things being equal. But they aren't. I've had my E39 M5, E39 540iT and Z4 MC all over 140mph and while they are all what I consider to be stable cars the Z4 MC is noticeably more stable than the others. This is even more apparent at the track. I suspect there is a significant difference in the downforce (or lack or lift) between the E46/E39s and the Z4 (at least the Coupe).

Dammmittt · 09-01-2007, 10:17 PM

There are a lot of things at work, center of gravity...which we've discussed elsewhere and unless one of you gets a wind tunnel scale combination, it's going to be hard to find out the true downforce you get, but i'm thinking with the front and rear wings integrated into the bumpers, you're going to get more than stock down force, the raised hood and coupe contours can't hurt either...but...like I said...it can still get twitchy at speeds over 140, never felt dangerous, but definately twitchy.

killjohnnyforan · 09-01-2007, 11:07 PM

so about that roof....

Dammmittt · 09-01-2007, 11:25 PM

It looks hot

TejasBIMMER · 09-02-2007, 10:12 AM

Quote:

Originally Posted by Palantirion

...I can't wait for mine to arrive :rocks:

I am surprised you have not done this FIRST!

Dammmittt · 09-02-2007, 10:52 AM

You can't be the first to do EVERYTHING.

OPTIMO · 01-11-2008, 10:21 AM

Can you post some pics of the gaps between the CF roof and the rest of the car? It's kind of hard to tell if the tolerance is at the same level of the OEM roof.

I'm looking at ordering an AW 08 Z4MC in two months once the E91 I just ordered shows up and I was thinking about sending the car to Wagon Werks to have this done before I even drove it home.

Car looks fantastic, I'd just want to have OEM fit and finish. I had some CF parts on my old E30 M3 and the gaps weren't as nice as the original parts from the factory.

Nevertheless, thanks for being a pioneer!

One more thing, did the CF roof have accomodations for the bolts that held the original roof on, or is it only secured by the sealant?

Dammmittt · 01-11-2008, 11:37 AM

He's got some Hi-Res shots he can send you links to...it'd probably be easier to PM him, I think sixspeed spends most of his foruming on z4-forum.

08-31-2007, 10:59 AM	#90
Dammmittt My favorite sign. 167 Rep 4,333 Posts Drives: 2007 M Coupe Join Date: Dec 2006 Location: Der Autobahnen iTrader: (0)	Cool...I guess I'll have to put it on a lift and check it out some time. __________________ 07 ///M Coupe (Premium Package) Black Saphire Ext. Imola Red Int. Best Website EVER!
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08-31-2007, 11:20 AM	#93
Dammmittt My favorite sign. 167 Rep 4,333 Posts Drives: 2007 M Coupe Join Date: Dec 2006 Location: Der Autobahnen iTrader: (0)	Choices choices... __________________ 07 ///M Coupe (Premium Package) Black Saphire Ext. Imola Red Int. Best Website EVER!
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08-31-2007, 06:11 PM	#97
F87LUV Lieutenant General 3689 Rep 15,081 Posts Drives: '16 M2, '23 GT4 Join Date: May 2007 Location: NJ iTrader: (4) Garage List 2023 Porsche GT4 [5.00] 2016 BMW M2 [8.66]	Ok i just did it!! Im not very happy with the job though!! __________________ IG: Trackinheels
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09-01-2007, 09:51 PM	#103
Palantirion First Lieutenant 16 Rep 385 Posts Drives: Z4 MC, M5, 540iT Join Date: Aug 2007 Location: SoCal iTrader: (0)	The shorter wheelbase of the Z4 would make it a little less stable than a sedan, or even a 3 series coupe - all things being equal. But they aren't. I've had my E39 M5, E39 540iT and Z4 MC all over 140mph and while they are all what I consider to be stable cars the Z4 MC is noticeably more stable than the others. This is even more apparent at the track. I suspect there is a significant difference in the downforce (or lack or lift) between the E46/E39s and the Z4 (at least the Coupe). __________________
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09-01-2007, 10:17 PM	#104
Dammmittt My favorite sign. 167 Rep 4,333 Posts Drives: 2007 M Coupe Join Date: Dec 2006 Location: Der Autobahnen iTrader: (0)	There are a lot of things at work, center of gravity...which we've discussed elsewhere and unless one of you gets a wind tunnel scale combination, it's going to be hard to find out the true downforce you get, but i'm thinking with the front and rear wings integrated into the bumpers, you're going to get more than stock down force, the raised hood and coupe contours can't hurt either...but...like I said...it can still get twitchy at speeds over 140, never felt dangerous, but definately twitchy. __________________ 07 ///M Coupe (Premium Package) Black Saphire Ext. Imola Red Int. Best Website EVER!
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09-01-2007, 11:07 PM	#105
killjohnnyforan First Lieutenant 29 Rep 339 Posts Drives: ///M Coupe Join Date: Jun 2007 Location: NY iTrader: (1)	so about that roof....
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09-01-2007, 11:25 PM	#106
Dammmittt My favorite sign. 167 Rep 4,333 Posts Drives: 2007 M Coupe Join Date: Dec 2006 Location: Der Autobahnen iTrader: (0)	It looks hot __________________ 07 ///M Coupe (Premium Package) Black Saphire Ext. Imola Red Int. Best Website EVER!
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09-02-2007, 10:52 AM	#108
Dammmittt My favorite sign. 167 Rep 4,333 Posts Drives: 2007 M Coupe Join Date: Dec 2006 Location: Der Autobahnen iTrader: (0)	You can't be the first to do EVERYTHING. __________________ 07 ///M Coupe (Premium Package) Black Saphire Ext. Imola Red Int. Best Website EVER!
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01-11-2008, 10:21 AM	#109
OPTIMO Enlisted Member 1 Rep 31 Posts Drives: Sold: E30 M3 Join Date: Aug 2007 Location: DC iTrader: (0)	Can you post some pics of the gaps between the CF roof and the rest of the car? It's kind of hard to tell if the tolerance is at the same level of the OEM roof. I'm looking at ordering an AW 08 Z4MC in two months once the E91 I just ordered shows up and I was thinking about sending the car to Wagon Werks to have this done before I even drove it home. Car looks fantastic, I'd just want to have OEM fit and finish. I had some CF parts on my old E30 M3 and the gaps weren't as nice as the original parts from the factory. Nevertheless, thanks for being a pioneer! One more thing, did the CF roof have accomodations for the bolts that held the original roof on, or is it only secured by the sealant?
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01-11-2008, 11:37 AM	#110
Dammmittt My favorite sign. 167 Rep 4,333 Posts Drives: 2007 M Coupe Join Date: Dec 2006 Location: Der Autobahnen iTrader: (0)	He's got some Hi-Res shots he can send you links to...it'd probably be easier to PM him, I think sixspeed spends most of his foruming on z4-forum. __________________ 07 ///M Coupe (Premium Package) Black Saphire Ext. Imola Red Int. Best Website EVER!
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