E90Post
 


Bimmer Retrofit
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > NA Engine (non-turbo) / Drivetrain / Exhaust Modifications > Finally deleted CDV



Reply
 
Thread Tools Search this Thread
      06-10-2012, 08:58 PM   #1
swheeler
New Member
 
Drives: 2006 330i
Join Date: Nov 2009
Location: Mesa AZ

Posts: 16
iTrader: (0)

Finally deleted CDV

Man, I wish I had done that when I first got the car. I really did want to wait till it was off extended warranty. What a nice change.
swheeler is offline  
0
Reply With Quote
      06-10-2012, 09:22 PM   #2
CJ421
Brigadier General
 
CJ421's Avatar
 
Drives: 2011 E92 335i
Join Date: Feb 2011
Location: PA

Posts: 3,253
iTrader: (1)

Garage List
2011 BMW 335i  [4.66]
Good decision. I found after I did this that I had become accustomed to the CDV; I realized I was subconsciously disengaging the clutch at the very end without feeling for the engagement (the flywheel and clutch still engage at the same speed w/ the CDV no matter how fast you release the clutch, so you can't feel/control when they connect). Once I had the ability to directly modulate that, I was forced to become a bit more precise.
__________________
2011 BMW E92 335i, 6MT, Le Mans blue - Quaife LSD, JRZ RS Pro, JRZ camber plates, Eibach ERS, full M3 susp, custom toe arms, Powergrid end-links, SS brake lines, brake ducting, Michelin PSS, UUC SSK, ETS FMIC, ER CP, Perf. Exhaust, VAC RSIK, Sparcos; work by VAC Motorsports in Philadelphia
CJ421 is offline   United_States
0
Reply With Quote
      06-10-2012, 09:52 PM   #3
texxy
First Lieutenant
 
Drives: 335
Join Date: Dec 2011
Location: somewhere

Posts: 386
iTrader: (4)

Are there not fake CDV mods as well? So it won't void warranty?
texxy is offline  
0
Reply With Quote
      06-10-2012, 10:11 PM   #4
Eric335
Colonel
 
Eric335's Avatar
 
Drives: 2007 E92 SG 335i 6MT
Join Date: Apr 2011
Location: SW Florida

Posts: 2,494
iTrader: (0)

Garage List
2007 BMW 335i  [3.83]
can someone explain this mod to me? i would do anything to improve my shifting experience lol
__________________
Eric335 is offline   United_States
0
Reply With Quote
      06-10-2012, 10:45 PM   #5
jeremicium
Captain
 
jeremicium's Avatar
 
Drives: 2009 335i coupe
Join Date: May 2009
Location: Olympia, Wa. USA

Posts: 833
iTrader: (0)

Garage List
http://www.e90post.com/forums/showthread.php?t=591642
__________________
09 E92/Montego Blue/Black leather/Dark burl trim/6MT/Premium/Sport/19" Matte Black Avant garde M310 Wheels/Nav/Comfort access/COBB stage 1
jeremicium is offline   United_States
0
Reply With Quote
      06-11-2012, 07:21 AM   #6
Three_thirty_I
Captain
 
Three_thirty_I's Avatar
 
Drives: '05 E90 330i Manual
Join Date: Aug 2010
Location: Cape Town, South Africa

Posts: 796
iTrader: (0)

Garage List
Hmm, since I bought mine, been thinking about doing this! Apparently the 335i manual guys don't seem to like this mod, at least that's what I've heard! Over the years I have gotten used to the feel (or lack) of the CDV clutch - most of the time my gear changes are smooth and consistent, but it still does catch me out every now and again, especially when trying to change gears a bit too quickly, which is where the CDV is of course most severe!

There is a proper modified CDV that one can fit that looks like the OEM part rather than removing it that it is too obvious, but one thing to consider once this has been done, you have direct control over the clutch and as such, much easier to break things! Just bear that in mind - not that the CDV prevents damage, but does prevent very sudden clutch actions!

The other problem that goes hand in hand with the CDV is the slightly dull throttle response which is why I have not done the CDV delete - then again, maybe having a predictable clutch with a slightly unpredictable throttle is better than both being unpredictable!

What other differences did you notice after this mod though?
__________________
BMW E90 330i (M) '05 (His) | (Hers) BMW E46 320i f/l (M) '03


Three_thirty_I is offline   South Africa
0
Reply With Quote
      06-11-2012, 09:49 AM   #7
CJ421
Brigadier General
 
CJ421's Avatar
 
Drives: 2011 E92 335i
Join Date: Feb 2011
Location: PA

Posts: 3,253
iTrader: (1)

Garage List
2011 BMW 335i  [4.66]
CDV = hydraulically induced clutch slippage. It's impossible to get 100% smooth shifts with it. I found that moving from a standstill was a pain with the CDV (realized after I had it removed). And shifting at high speeds, I always got a slight bump.

The current M3 does not have the CDV, so that says something. If you know how to drive standard, you don't need the CDV.
__________________
2011 BMW E92 335i, 6MT, Le Mans blue - Quaife LSD, JRZ RS Pro, JRZ camber plates, Eibach ERS, full M3 susp, custom toe arms, Powergrid end-links, SS brake lines, brake ducting, Michelin PSS, UUC SSK, ETS FMIC, ER CP, Perf. Exhaust, VAC RSIK, Sparcos; work by VAC Motorsports in Philadelphia
CJ421 is offline   United_States
0
Reply With Quote
      06-11-2012, 10:00 AM   #8
swheeler
New Member
 
Drives: 2006 330i
Join Date: Nov 2009
Location: Mesa AZ

Posts: 16
iTrader: (0)

Three_thirty_i, the difference is simply predictable clutch engagement. It engages when you want it to instead of through the delay. If some people are experiencing a dull throttle response, it is simply because they do not know how to drive a manual. CDV has absolutely nothing to do with throttle except it acts to slip the clutch.
swheeler is offline  
0
Reply With Quote
      06-11-2012, 10:07 AM   #9
jphughan
Brigadier General
 
jphughan's Avatar
 
Drives: 2011.75 M3 E92 6MT
Join Date: Mar 2011
Location: Austin, TX

Posts: 3,263
iTrader: (0)

Quote:
Originally Posted by CJ421 View Post
The current M3 does not have the CDV, so that says something. If you know how to drive standard, you don't need the CDV.
Funny that you mention this. I had a chance to talk to Matt Russell (M Brand Manager for BMWNA) at an M5/M6 unveiling at BMW of Austin and he said that "Some M3s do have a CDV." Unfortunately he wouldn't elaborate on that even though I pressed him a few times, and normally I just write that type of comment off as uninformed talk from a branding guy, but at the event it was abundantly clear that Matt knew what he was talking about, and not just about the M5/M6. So now I'm wondering if M3s of certain body styles or produced within a certain date range have them, or maybe all of them have a CDV but it's far less intrusive than the series model version?
__________________
11 M3 E92 Le Mans | Black Nov w/ Alum | 6MT | Premium 2 | Convenience | 19" | EDC | Prem Audio | Moonroof | BMW Apps | Vorshlag Adjustable Camber Plates | StopTech ST-60 380mm BBK | Castrol SRF Fluid | ModMyNav.com rear camera | OEM Euro Sunglasses Holder
jphughan is online now   United_States
0
Reply With Quote
      06-11-2012, 10:36 AM   #10
Three_thirty_I
Captain
 
Three_thirty_I's Avatar
 
Drives: '05 E90 330i Manual
Join Date: Aug 2010
Location: Cape Town, South Africa

Posts: 796
iTrader: (0)

Garage List
Quote:
Originally Posted by swheeler View Post
Three_thirty_i, the difference is simply predictable clutch engagement. It engages when you want it to instead of through the delay. If some people are experiencing a dull throttle response, it is simply because they do not know how to drive a manual. CDV has absolutely nothing to do with throttle except it acts to slip the clutch.
Okay, that's good to hear! My car's just about to enter the world of being out of motorplan, so think this will be my first proper mod!

Only drive manual vehicles and never said that there was any direct correlation between the throttle and clutch feel. With regards to the throttle, I am talking mostly about the adaptations and drive-by-wire character. Have gotten used to it, but still doesn't feel as direct as most other cars - even my manual diesel pickup has a more responsive throttle, of course further helped by the massive diesel torque from idle speed!
__________________
BMW E90 330i (M) '05 (His) | (Hers) BMW E46 320i f/l (M) '03


Three_thirty_I is offline   South Africa
0
Reply With Quote
      06-11-2012, 02:13 PM   #11
dcat151
Lieutenant
 
Drives: 2006 330i 6MT ZSP/ZPP/ZCW
Join Date: Nov 2009
Location: Gainesville, GA

Posts: 538
iTrader: (1)

CDV delete is a must-do mod. It improves the driving experience immensely.

Throttle response is not great compared to other cars I've owned, but you get used to it.
dcat151 is offline   Wales
0
Reply With Quote
      06-11-2012, 02:30 PM   #12
Three_thirty_I
Captain
 
Three_thirty_I's Avatar
 
Drives: '05 E90 330i Manual
Join Date: Aug 2010
Location: Cape Town, South Africa

Posts: 796
iTrader: (0)

Garage List
Quote:
Originally Posted by dcat151 View Post
CDV delete is a must-do mod. It improves the driving experience immensely.

Throttle response is not great compared to other cars I've owned, but you get used to it.
Thanks! Yep, must get this done then!
__________________
BMW E90 330i (M) '05 (His) | (Hers) BMW E46 320i f/l (M) '03


Three_thirty_I is offline   South Africa
0
Reply With Quote
      06-11-2012, 02:33 PM   #13
elcheapoloco
douchebaggo
 
Drives: stick
Join Date: Oct 2009
Location: CA

Posts: 511
iTrader: (1)

Quote:
Originally Posted by dcat151 View Post
CDV delete is a must-do mod. It improves the driving experience immensely.

Throttle response is not great compared to other cars I've owned, but you get used to it.
I agree. Recently got this done and now must unlearn the muscle memory developed from years of CDV. That's why this should be done right after getting the car.
elcheapoloco is offline  
0
Reply With Quote
      06-11-2012, 08:53 PM   #14
Lou2
Private
 
Drives: 2007 328xi 6MT
Join Date: Jan 2011
Location: NY

Posts: 70
iTrader: (0)

Anyone have any problems with this mod. Anything break as a result?

I occasionally have problems engaging smoothly and would love to fix this...just dnt want to have problems down the road.
Lou2 is offline  
0
Reply With Quote
      06-12-2012, 07:50 AM   #15
desertfx41
SSAH
 
Drives: 2007 328i 6-spd manual
Join Date: Jan 2012
Location: Ft. Lauderdale, FL

Posts: 39
iTrader: (0)

Quote:
Originally Posted by elcheapoloco View Post
I agree. Recently got this done and now must unlearn the muscle memory developed from years of CDV. That's why this should be done right after getting the car.
I completely agree. Just removed mine on Sunday and really enjoy the difference so far. What as stupid system for BMW to put in these cars.
__________________
'07 328i 6spd MT - Sport Package - H&R Sport Cup Kit - TMS 10mm/20mm Spacers- AA Tune - K&N - TMS Cross Drilled Rotors - Axxis MM Pads
desertfx41 is offline   United_States
0
Reply With Quote
      06-14-2012, 08:52 PM   #16
mcrazyrider
Second Lieutenant
 
mcrazyrider's Avatar
 
Drives: 08 E90
Join Date: May 2010
Location: St Pete FL

Posts: 230
iTrader: (1)

Garage List
08 E90  [0.00]
Quote:
Originally Posted by Lou2 View Post
Anyone have any problems with this mod. Anything break as a result?

I occasionally have problems engaging smoothly and would love to fix this...just dnt want to have problems down the road.
Just about to pull the trigger on this mod any bad expiriences with this mod?
__________________
mcrazyrider is offline   United_States
0
Reply With Quote
      06-14-2012, 11:05 PM   #17
RupertPupkin
Lieutenant Colonel
 
RupertPupkin's Avatar
 
Drives: Freak Beast
Join Date: Aug 2011
Location: East

Posts: 1,534
iTrader: (5)

Quote:
Originally Posted by mcrazyrider
Quote:
Originally Posted by Lou2 View Post
Anyone have any problems with this mod. Anything break as a result?

I occasionally have problems engaging smoothly and would love to fix this...just dnt want to have problems down the road.
Just about to pull the trigger on this mod any bad expiriences with this mod?
none at all except you'll wonder why you didn't do it sooner. very very easy simple thing to do.
RupertPupkin is offline   United_States
0
Reply With Quote
      06-16-2012, 09:47 PM   #18
mcrazyrider
Second Lieutenant
 
mcrazyrider's Avatar
 
Drives: 08 E90
Join Date: May 2010
Location: St Pete FL

Posts: 230
iTrader: (1)

Garage List
08 E90  [0.00]
Quote:
Originally Posted by RupertPupkin View Post
none at all except you'll wonder why you didn't do it sooner. very very easy simple thing to do.
Thanks, this will be my next mod.
__________________
mcrazyrider is offline   United_States
0
Reply With Quote
      08-02-2012, 07:15 PM   #19
pimp4cheddar
El Capitán
 
pimp4cheddar's Avatar
 
Drives: Mojave E92
Join Date: Jul 2011
Location: Central Florida

Posts: 1,778
iTrader: (11)

I hate to bring a dead thread back to life...but I'm doing so anyway.

Does removing the CDV yield the same results that a "modified" CDV does???

(I know people have a DIY for the OEM one)...but Burger Tuning sells a modified CDV that's ported. Does the modified one do the same thing as removing the OEM one?

I want easier shifts...less jerking and this seems to be the fix.
pimp4cheddar is offline   United_States
0
Reply With Quote
      08-03-2012, 06:23 AM   #20
driverman
Lieutenant
 
Drives: 2008 E90 328i 6MT
Join Date: Nov 2008
Location: El Dorado Hills, CA

Posts: 587
iTrader: (0)

I can see how the CDV delete/modify would make a difference when shifting fast, but does it make a difference when shifting slowly?
driverman is offline   United_States
0
Reply With Quote
      08-04-2012, 03:32 AM   #21
plokij
Lieutenant
 
plokij's Avatar
 
Drives: Nothing
Join Date: May 2011
Location: SoCal

Posts: 520
iTrader: (1)

Quote:
Originally Posted by driverman
I can see how the CDV delete/modify would make a difference when shifting fast, but does it make a difference when shifting slowly?
I've had 3 MT cars over the years and the CDV on my E91 doesn't really bother me. I never push the car (it won't go very quickly anyway) so I don't notice the CDV after getting used to it. I've found that if you release the throttle before depressing the clutch you will have a disjointed shift. Keep the throttle in while depressing the clutch, then release the throttle while selecting a gear, and the shift is smooth.

I would not want the CDV on a track or for frequent spirited street driving.
plokij is offline   United_States
0
Reply With Quote
      08-04-2012, 04:17 AM   #22
Three_thirty_I
Captain
 
Three_thirty_I's Avatar
 
Drives: '05 E90 330i Manual
Join Date: Aug 2010
Location: Cape Town, South Africa

Posts: 796
iTrader: (0)

Garage List
As far as I know, the CDV delete (removing the valve altogether) and the modified CDV (professionally modified valve) should yield the same results since they are both allowing normal flow instead of the restriction...

Quote:
Originally Posted by plokij View Post
I've had 3 MT cars over the years and the CDV on my E91 doesn't really bother me. I never push the car (it won't go very quickly anyway) so I don't notice the CDV after getting used to it. I've found that if you release the throttle before depressing the clutch you will have a disjointed shift. Keep the throttle in while depressing the clutch, then release the throttle while selecting a gear, and the shift is smooth.

I would not want the CDV on a track or for frequent spirited street driving.
Yep, that was one of the first things that I found worked to smooth things out.
__________________
BMW E90 330i (M) '05 (His) | (Hers) BMW E46 320i f/l (M) '03


Three_thirty_I is offline   South Africa
0
Reply With Quote
Reply

Bookmarks

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 10:55 AM.




e90post
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