CDV really ruins everything
#1
Registered User
Thread Starter
Join Date: May 2005
Location: Hong Kong
Posts: 5,253
Likes: 0
Received 0 Likes
on
0 Posts
CDV really ruins everything
Just removed my CDV (clutch delay valve) today. Wow, what a big diff!
I removed the CDV on my previous S -- an AP2 -- before it was even fully broken-in. So I was still relatively new to the car back then, and didn't notice such little things.
When I got my second one, the clutch pedal's response was a tad slow in comparison, other than the clutch not "catching" the flywheel right away when I shift. I thought it was just a weak/slightly worn clutch, and maybe the clutch fluid was old ...
Finally got a chance to clean that up after 6 months on my current S, and heck, it feels like the spanking new AP2 that I had before!!! In fact, removing the CDV made daily driving nicer too. The AP1 flywheel + engine + CDV is a bit annoying; the revs drops quickly on the AP1, and combine that with the CDV, I actually need to shift faster on upshifts and hit the gas pedal harder on downshifts to compensate for that lag, or else the revs don't line up properly.
Anyway ... I've completely forgotten how annoying the CDV was. Ya, I know, this isn't news to 99% of you guys But if you haven't gotten rid of yours, then you may want to look into this
I removed the CDV on my previous S -- an AP2 -- before it was even fully broken-in. So I was still relatively new to the car back then, and didn't notice such little things.
When I got my second one, the clutch pedal's response was a tad slow in comparison, other than the clutch not "catching" the flywheel right away when I shift. I thought it was just a weak/slightly worn clutch, and maybe the clutch fluid was old ...
Finally got a chance to clean that up after 6 months on my current S, and heck, it feels like the spanking new AP2 that I had before!!! In fact, removing the CDV made daily driving nicer too. The AP1 flywheel + engine + CDV is a bit annoying; the revs drops quickly on the AP1, and combine that with the CDV, I actually need to shift faster on upshifts and hit the gas pedal harder on downshifts to compensate for that lag, or else the revs don't line up properly.
Anyway ... I've completely forgotten how annoying the CDV was. Ya, I know, this isn't news to 99% of you guys But if you haven't gotten rid of yours, then you may want to look into this
#3
Registered User
Join Date: Feb 2006
Location: San Jose, CA
Posts: 3,627
Likes: 0
Received 0 Likes
on
0 Posts
It's slips/delays your clutch engagement on launches and hard, high rpm shifts. Honda did this to remove stress on the diff. Also, it's only present on AP2's.
#4
Registered User
Thread Starter
Join Date: May 2005
Location: Hong Kong
Posts: 5,253
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Kurt2k,Jun 21 2008, 01:34 PM
What does it exactly do? I don't know too much about it. Pros/Cons?
It's meant to delay the timing of the friction plate from pressing against the flywheel when you release the clutch pedal. The clutch feels as if it's slipping a little when you pop the clutch through shifts. Honda added this to the S2000 in 2004 to reduce the risk of people breaking the rear diff in hard launches, as the CDV slips the clutch a little.
#7
Moderator
Actually, the CDV regulates the speed with witch the clutch plate engages, so you can't engage the clutch faster than a certain rate. It is there to prevent driveline shock. On fast redline shifts, the CDV and heavy flywheel (on AP2 S2000s) work to keep the clutch engagement relatively slow and keep the clutch from catching in a firm manner. The CDV is half the issue, the pp is the other. Its easier to remove the CDV, but the PP is the bigger issue imo.
Trending Topics
#8
Registered User
Join Date: Aug 2004
Location: La Crescenta, CA
Posts: 1,590
Likes: 0
Received 0 Likes
on
0 Posts
i dont understand this issue. i didn't touch my cdv and i think the car feels fine. i'm able to land on vtec on my 1-2 shift and i dont smell my clutch burning after a hard drive. i need to drive someobody's ap2 with the cdv removed to see what the big fuss is about.
#10
Registered User
Originally Posted by J'sS2K,Jun 21 2008, 05:07 PM
You can easily cook the clutch if you don't adjust your clutch engaging style when the CDV is removed.