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Old 11-15-2012, 02:20 PM   #21
webster
Registered User
 
Join Date: Aug 2011
Location: Houston, TX
Posts: 152
My Ride: 04 330Ci ZHP
Quote:
Originally Posted by EverydayGetaway View Post
Your logic is extremely flawed. The whole point of the dual mass flywheel and cdv is for smoother shifts...

Sent from my DROIDX using Bimmer App
wrong. CDV is to prevent damage to the drivetrain from aggressive driving. here's a quote from the Zeckhausen website:

Quote:
The Clutch Delay Valve (CDV) is a one-way restrictor installed by the factory between the clutch slave cylinder and clutch master cylinder, as shown in Figure 1. It "delays" the engagement of the clutch, much like old record players use a damped tone-arm to gently lower the needle onto the surface of a record.

Because of this valve, no matter how quickly you lift your foot off the clutch pedal, the clutch engages the flywheel at a constant (slow) rate. In theory, it can save the driveline from shock, were an inexperienced (or immature) driver to dump the clutch. But in practice, all it does is prematurely wear out the clutch and turn experienced drivers into people who, despite years of practice, cannot shift smoothly.
http://zeckhausen.com/cdv.htm
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Last edited by webster; 11-15-2012 at 02:20 PM.
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