I personally believe the CDV is not as much a problem when shifting an AP2 is as is the pressure plate not being firm enough to keep the clutch from slipping. many people who remove the CDV report slippage just as bad or worse when the CDV is out, and people who have replaced the PP with a firmer unit state that fixes AP2 clutch slippage issues.

And for the record, I think your statement "since the AP2 is equipped with a CDV, the ability to shift smoothly is hampered" is absurd.

 

Saki GT, do you think it's a good idea to upgrade the PP and leave the CDV? I want to get rid of the slippage on the 1-2 shift. (And if it makes a difference, I never launch my car)

 

either rev it higher then shift... or add a engine damper... it makes shifts more smooth.

 

Since I am not an owner of an AP2 and have only driven one at low speeds, it was new to me and I did not master the shifting right away. I shift butter-smooth with my car, but was unable to do so with the S2000 using the same techniques, so the CDV could have been what was messing with the smoothness. I agree, my comment was a bit harsh considering my experience.

 

Well, sorry for coming off abrupt, but with practice you can shift any car smoothly, and the CDV won't effect shift smoothness imo. If anything, since the CDV slows things down, that would make it easier to shift smoothly.

My shifting is always less than perfect my first time in a different manual trans car, but once you learn the set up, being smooth is possible. I'm not sure what car you have, but I've never experienced two cars that shifted the same, you always have to adapt and that can take time.

 

I think this is one of the more informative threads on the CDV: https://www.s2ki.com/forums/index.php?showtopic=417350

That thread, plus what I've read elsewhere here and in conversations with AP2 owners who have removed the CDV, has me believing that while the CDV does slow engagement, the PP doesn't seem to have enough bite to lock things down regardless.

You can read all 10 pages of the CDV removal DIY, but the gist is AP2 owners love it but still note slippage. Some people have gone back to stock, and people who've replaced the PP seem more happy with that mod than the CDV mod. The CDV removal trend started right when AP2s came out, but over time I think people are seeing that the PP is also a culprit in slippage, and in fact may be the bigger issue.

I think the AP2 clutch modified with an ACT PP or something similar would help, a lighter flywheel might help, and the CDV... maybe. At this point, I'm inclined to leave it in even if I replace my PP and see what happens, sine the CDV is pretty easy to take out afterward.

 

just take it out, cdv sucks when you drive even slightly aggressively

 

Agreed.
I remember when I had my 240, it loved to be granny shifted. However with the S, you have to throw it in at just the right speed and just the right rpm, plus having the car fully warmed up helps a lot too. But once you get it right, it's sublime.