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CDV seems like a really bad idea

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Old Jun 21, 2008 | 04:37 PM
  #1  
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Default CDV seems like a really bad idea

I understand why they put it but when I race my 07 it gives me fits.
When I shift from 1st to 2nd or 2nd to 3rd it feels like the clutch is just slipping. The RPMs shoot back up to 8k and the car does not accelerate until I back off the gas. This results in me taking more time to shift. The best way to describe what I am doing would be power shifting or attempting to chirp the tires. I have only done it a few times but when it happens it makes me cringe at the thought of my clutch just burning up. I feel this is happening due to the CDV.
My cousin bought an 07 right around the same time as me and he burned up the , pressure plate and bearing at about 5000 miles. I cost him thousands of dollars. Honda said it wasn't covered under warranty. He saw the parts they took out and he said they looked like they caught on fire. I bet he was pushing the car hard and it was due to the CDV.

I was wondering if a racing clutch would help and allow me to shift more aggressively?

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Old Jun 21, 2008 | 05:09 PM
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For what you want to do, take out the CDV. Find the thread on how-to, it didn't look hard.
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Old Jun 21, 2008 | 05:53 PM
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https://www.s2ki.com/forums/index.ph...ic=282205&st=0
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Old Jun 21, 2008 | 06:24 PM
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LOL, it sounds to me like you don't know how to drive a manual!
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Old Jun 21, 2008 | 06:32 PM
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Ty so much Bob A. That was the write up I was looking for but couldn't find!

J'sS2K, I have put 30k miles on a 93 GSR, 100k on a 2000 Prelude, and about 7k on my S2K. And I drove stick for a few jobs which is where I really went nuts with a manual every day.
Looks like you got a 2005 which has the same valve. Have you ever powershifted your car? If not try it and you'll see what I mean.
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Old Jun 21, 2008 | 06:38 PM
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You win! I love the drivetrain too much to be doing powershifting. HAHAHA
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Old Jun 21, 2008 | 07:14 PM
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Upgrade your pressure plate - its the real culprit to clutch slip, not the cdv.
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Old Jun 21, 2008 | 07:22 PM
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From another thread:

Clutch slip is due to the pressure plate not having enough grip, not the cdv. People who have removed the cdv state they still experience slip, and people that have replaced the pp or put in a lighter flywheel state they have less/no slip.

I don't think the cdv is the main culprit - it slows the engagement of the clutch, but its the pp that grips. The clutch will always disengage at the same rate with a cdv, but if you've ever experienced this slippage in an AP2 on a hard shift, the slippage lasts much longer than the cdv delays the clutch. The main culprit imo is a pp that cannot grip the heavier flywheel Honda introduced in2004.

If you remove the cdv, you will have direct release that can engage faster than the cdv on shifts, and that will feel different than the cdv, but for grip, its the pp, not the cdv.
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Old Jun 21, 2008 | 09:26 PM
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I'm giong to try removing the CDV in a few weeks and see how much it helps. The response from others who have done it seem very positive and it should take no more than a few hours to complete. If it doesn't work I'll just ugrade the pressure plate after I get some good use out of the stock one. Thanks again for the advice.
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Old Jun 21, 2008 | 09:46 PM
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My CDV gone. Im able to chirp third (though ive only done so once, i dont wanna screw up the drivetrain).

But a friend also removed their CDV and still had slip. Just replaced clutch last weekend and still kinda slippy. So, im gonna agree with Saki on this one

... oh mine was removed at about 5k miles.
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