CDEV Delete... why did I wait so long

schwank · 05-07-2011, 03:45 PM

I got my car back from inspection II yesterday. I had it done at an INDY shop since im out of warranty. I had them pull the Clutch delay valve while they were in there, and WOW what a difference! If you havent done it DO IT. the car shifts much smoother, and feels like a regular car now... Ive had my car 4.5 years. why did I wait!

Lark · 05-07-2011, 04:08 PM

Not waiting that long. Bought in Feb. In the shop right now for installation of Cosmos Strut Brace, UUC SSK and removal of the CDV. I'm anxious to see the difference.

wasupdu · 05-07-2011, 04:10 PM

Hmmm....interesting. I have the CDV still in my Z4 only because I've read a couple opinions on here (or maybe z4-forum) saying that the CDV definitely transforms the car, but if you've gotten use to driving the car with it installed then it may take a while getting use to driving without it.

Maybe I'll give it a shot. I've been on the fence for a couple years now...

johanness · 05-07-2011, 04:41 PM

There's zero reason to not do this mod

biped · 05-07-2011, 05:55 PM

Just got mine from Zeckenufenhauschmidtzer, sitting in a bag on my desk, can't wait... going to do with the complete fluid change hopefully next weekend. Looking also for opinions on replacement transmission bushings. Seems the poly ones with no NVH are far too noisy.

Had the car for almost a month, and the shifting is driving me nuts, and I've shifted everything from dump trucks to vintage muscle cars to import missiles. Its so frustrating when you miss it, yet so rewarding when you nail it.

wdupdog · 05-07-2011, 06:44 PM

So if you're still under warranty buy the fake one or do you think there would be a problem just to delete? I got another year left, wouldn't want to jeopardize that.

prodigal_m · 05-07-2011, 08:43 PM

It is rather shocking on how removing/modifying the CDV transforms the car. If you are reading this thread right now and have not yet removed the CDV…do it and you will fall in love with our car all over again.

BTM · 05-07-2011, 09:35 PM

Removed mine and I honestly didn't notice much of a difference

silversprint · 05-07-2011, 10:04 PM

I sold the Z4M. I have a new uninstalled CDV delete valve I can sell. PM me if interested.

papitosabe · 05-08-2011, 12:23 AM

so why buy and install a modified cdv if taking it out does the same thing??

SmartBastard · 05-08-2011, 01:38 AM

Still under warranty so not sure if to do it or not, especially with some ppl saying that there's no difference.

G80indy · 05-08-2011, 04:21 AM

it's a no-brainer mod. An absolute must. Shifts will be precise and follow your slightest touch, rather than be vague and slow to obey.

beta · 05-08-2011, 04:53 AM

I'm just concerned about long term damage to the car. If it's unnecessary, why was it put in there in the first place?

prodigal_m · 05-08-2011, 07:40 AM

Quote:

Originally Posted by beta

I'm just concerned about long term damage to the car. If it's unnecessary, why was it put in there in the first place?

If anything, the CDV actually accelerates wear on the clutch. I may not agree with the logic but I can understand why manufactures gravitate towards longevity, fuel economy and safety (top speed limiter, limited camber adjustment, DSC, etc...) however; the CDV just doesn’t make sense if you actually know how to drive a manual.

I am all for progress but with every M car I've had over the years there have been more and more "safety" features that seem to suck the fun out of the experience (IMO).
Oh, and CDV’s have been happily removed for over a decade without any negative consequences.

Ron Stygar · 05-08-2011, 01:15 PM

Quote:

Originally Posted by beta

I'm just concerned about long term damage to the car. If it's unnecessary, why was it put in there in the first place?

http://www.bimmerfest.com/forums/sho...6&postcount=44

steveayd · 05-08-2011, 02:05 PM

How much did the inspection two run you, that is if you don't mind sharing.

ZStig · 05-08-2011, 03:32 PM

I've never had any issues with the stock shifting, in fact, the stock CDV was smooth enough for me. The modified one is more direct and immediate (but probably less smooth as a result)

beta · 05-08-2011, 05:15 PM

Quote:

Originally Posted by Ron Stygar

http://www.bimmerfest.com/forums/sho...6&postcount=44

Thanks Ron always great info.

schwank · 05-08-2011, 06:00 PM

about $1150

Finnegan · 05-08-2011, 07:37 PM

Quote:

Originally Posted by biped

Just got mine from Zeckenufenhauschmidtzer, sitting in a bag on my desk, can't wait... going to do with the complete fluid change hopefully next weekend. Looking also for opinions on replacement transmission bushings. Seems the poly ones with no NVH are far too noisy.

Had the car for almost a month, and the shifting is driving me nuts, and I've shifted everything from dump trucks to vintage muscle cars to import missiles. Its so frustrating when you miss it, yet so rewarding when you nail it.

RE: The CDV delete makes it much easier to be smoother in shifting this car. If you know how to drive stick it it just makes you look bad.

On the transmission mounts, go with the Rogue. The poly offer a very marginal improvement over the neoprene and doesn't address the other culprit: the engine. If you absolutely want to avoid denial of 2nd from 3rd then the Rogue motor mounts are the way to go as well. More info here.

If the action of the shifter itself is bugging you, an SSK is probably the best bet. There's a good thread on how to do the install (which is a PITA like the mounts) here. A ZHP knob is a big improvement that some swear by to (go to LeatherZ--sold there).

thekurgan · 05-08-2011, 11:24 PM

Quote:

Originally Posted by Finnegan

RE: The CDV delete makes it much easier to be smoother in shifting this car. If you know how to drive stick it it just makes you look bad.

On the transmission mounts, go with the Rogue. The poly offer a very marginal improvement over the neoprene and doesn't address the other culprit: the engine. If you absolutely want to avoid denial of 2nd from 3rd then the Rogue motor mounts are the way to go as well. More info here.

If the action of the shifter itself is bugging you, an SSK is probably the best bet. There's a good thread on how to do the install (which is a PITA like the mounts) here. A ZHP knob is a big improvement that some swear by to (go to LeatherZ--sold there).

I'd be curious about the motor mounts, the RE tranny mounts have been sweet!

gatorfast · 05-09-2011, 02:53 PM

Im curious to drive a car with the CDV removed to feel the difference. I honestly dont have any problem shifting smoothly with my car as is. Took some getting used to at first but its second nature now.

05-07-2011, 03:45 PM	#1
schwank First Lieutenant 30 Rep 317 Posts Drives: 06 z4 m coupe Join Date: Nov 2006 Location: cincinnati iTrader: (0)	CDEV Delete... why did I wait so long I got my car back from inspection II yesterday. I had it done at an INDY shop since im out of warranty. I had them pull the Clutch delay valve while they were in there, and WOW what a difference! If you havent done it DO IT. the car shifts much smoother, and feels like a regular car now... Ive had my car 4.5 years. why did I wait!
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05-07-2011, 04:08 PM	#2
Lark Gone but not forgotten 4 Rep 148 Posts Drives: '09 335i Dinan S3/'13 BoxsterS Join Date: Feb 2011 Location: Houston iTrader: (0)	Not waiting that long. Bought in Feb. In the shop right now for installation of Cosmos Strut Brace, UUC SSK and removal of the CDV. I'm anxious to see the difference. __________________ 2015 Audi SQ5 RECENT PAST 2013 Porsche Boxster S 2009 335i/Coupe/Dinan S3 2006 BMW Z4 3.0si Last edited by Lark; 05-08-2011 at 08:44 AM..
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05-07-2011, 04:10 PM	#3
wasupdu Lieutenant 25 Rep 413 Posts Drives: Z4 3.0, CLS63 AMG Join Date: Jun 2007 Location: Milwaukee, WI iTrader: (0) Garage List 2013 Mercedes CLS63 ... [0.00] 2005 BMW Z4 [0.00]	Hmmm....interesting. I have the CDV still in my Z4 only because I've read a couple opinions on here (or maybe z4-forum) saying that the CDV definitely transforms the car, but if you've gotten use to driving the car with it installed then it may take a while getting use to driving without it. Maybe I'll give it a shot. I've been on the fence for a couple years now... __________________ 2005 BMW Z4 Roadster 3.0 - Black Sapphire with Red Extended Leather / NAV / Premium & Sport Pkgs / 19" wheels / M steering wheel / Xenon 2013 Mercedes CLS63 AMG
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05-07-2011, 04:41 PM	#4
johanness Banned 56 Rep 1,739 Posts Drives: 2008 Z4MC Join Date: Aug 2010 Location: Seattle, Vancouver iTrader: (3) Garage List 2008 BMW Z4M COUPE [7.00] 2012 BMW X1 xDrive 28i [9.00]	There's zero reason to not do this mod
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05-07-2011, 05:55 PM	#5
biped Private 6 Rep 59 Posts Drives: 97 e38, 01 e38, 07 z4mc Join Date: Apr 2011 Location: Western Canada iTrader: (0)	Just got mine from Zeckenufenhauschmidtzer, sitting in a bag on my desk, can't wait... going to do with the complete fluid change hopefully next weekend. Looking also for opinions on replacement transmission bushings. Seems the poly ones with no NVH are far too noisy. Had the car for almost a month, and the shifting is driving me nuts, and I've shifted everything from dump trucks to vintage muscle cars to import missiles. Its so frustrating when you miss it, yet so rewarding when you nail it.
	Appreciate 0 Quote

05-07-2011, 06:44 PM	#6
wdupdog Private 0 Rep 86 Posts Drives: Z4 Join Date: Feb 2011 Location: ND iTrader: (0)	So if you're still under warranty buy the fake one or do you think there would be a problem just to delete? I got another year left, wouldn't want to jeopardize that.
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05-07-2011, 08:43 PM	#7
prodigal_m Member 16 Rep 178 Posts Drives: 2018 Estoril Blue/Black F31 Join Date: Dec 2010 Location: SE Wisconsin iTrader: (1)	It is rather shocking on how removing/modifying the CDV transforms the car. If you are reading this thread right now and have not yet removed the CDV…do it and you will fall in love with our car all over again.
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05-07-2011, 09:35 PM	#8
BTM Banned 485 Rep 10,309 Posts Drives: A///MERICAN!!! Join Date: Mar 2010 Location: A///MERICA!!! iTrader: (11) Garage List 2007 BMW Z4 M Coupe [7.20]	Removed mine and I honestly didn't notice much of a difference
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05-07-2011, 10:04 PM	#9
silversprint Private First Class 3 Rep 164 Posts Drives: Z4M Join Date: Nov 2007 Location: SOCAL iTrader: (0)	I sold the Z4M. I have a new uninstalled CDV delete valve I can sell. PM me if interested. __________________ MR-S Track -2100lbs/300hp Miata Z4M Coupe (Sold)
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05-08-2011, 12:23 AM	#10
papitosabe Second Lieutenant 5 Rep 231 Posts Drives: '06 Z4 Coupe Join Date: Oct 2007 Location: Houston iTrader: (1)	so why buy and install a modified cdv if taking it out does the same thing??
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05-08-2011, 01:38 AM	#11
SmartBastard Stupid as shit 26 Rep 367 Posts Drives: '08 M Coupe Join Date: Jan 2011 Location: Vienna, Austria iTrader: (0)	Still under warranty so not sure if to do it or not, especially with some ppl saying that there's no difference.
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05-08-2011, 04:21 AM	#12
G80indy Save the Manuals 1714 Rep 2,937 Posts Drives: Z3, E46, G80 Join Date: May 2005 Location: Indy iTrader: (0)	it's a no-brainer mod. An absolute must. Shifts will be precise and follow your slightest touch, rather than be vague and slow to obey. __________________ 2023 G80 6MT, CCBs 2002 330i Dinan, 5MT 2000 Z3 Conforti, 5MT
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05-08-2011, 04:53 AM	#13
beta Lieutenant Colonel 80 Rep 1,663 Posts Drives: 2006 M Roadster Join Date: Mar 2011 Location: CA iTrader: (2)	I'm just concerned about long term damage to the car. If it's unnecessary, why was it put in there in the first place? __________________ modification journal
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05-08-2011, 02:05 PM	#16
steveayd New Member 1 Rep 25 Posts Drives: 07 M coupe Join Date: Mar 2010 Location: North NJ iTrader: (0)	How much did the inspection two run you, that is if you don't mind sharing.
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05-08-2011, 03:32 PM	#17
ZStig instagram 997turbotom 279 Rep 7,377 Posts Drives: Interlagos Z4MR Join Date: Jun 2008 Location: Delray Beach, FL iTrader: (4)	I've never had any issues with the stock shifting, in fact, the stock CDV was smooth enough for me. The modified one is more direct and immediate (but probably less smooth as a result) __________________
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05-08-2011, 06:00 PM	#19
schwank First Lieutenant 30 Rep 317 Posts Drives: 06 z4 m coupe Join Date: Nov 2006 Location: cincinnati iTrader: (0)	about $1150
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05-09-2011, 02:53 PM	#22
gatorfast Major General 5002 Rep 6,864 Posts Drives: 718 Cayman Join Date: Jan 2008 Location: SoFla iTrader: (4)	Im curious to drive a car with the CDV removed to feel the difference. I honestly dont have any problem shifting smoothly with my car as is. Took some getting used to at first but its second nature now.
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