N2oExpresS2k

That'd be the first mod I'd do if I owned an ap2..

s2killa

watching from a distance

S2oooNvegas

no, cmon. you think this thing hold the PP open for 5 minutes. its design is to stop the plate from "slamming" shut at the last fraction of engagement. it does exactly that once a stronger plate is installed. you cant even tell that its there on my car. IE its doing its job. unnoticeable micro slip, to stop shock. its a simple principle, but sometimes is hard to explain.

S2oooNvegas

lol, we dont need to go to bat. weve agreed on everything else ever discussed. so i wont get into with you on this one. we can agree to disagree agreeably.

S2oooNvegas

it drives me nuts not being able to get a point acrossed. here is some info, from a friend who is no longer with us. who R&D'd and ran this part on his drag cars for 30+ years. and where i got my info from, and ran the part on my cars also.



"The following is how it works. When the clutch is engaged and the engine speed is closely matched to the car speed and chosen gear, there is no shock load. If there is a large difference in engine and car speed, such as speed shifting or engaging the clutch fast when the car is standing still (drag race start), at the exact moment the clutch disc locks up, there is a shock peak that is astronomical. If this peak is high enough, it will break parts right away. If the peak is slightly less, parts might break in 100 clutch engagements. If the shock peak is low enough, maybe nothing will ever break.
If the torque shock peak concept is difficult to understand, imagine letting your clutch out slower. Obviously the shock load is less. However, trying to control a fast clutch engagement reliably (so that parts won't break), in racing situations consistently, is impossible. The "Washington Anti Shocker" (

RACER

Somebody already has

https://www.s2ki.com/forums/index.ph...opic=512537&st




[QUOTE=S2oooNvegas,Jul 15 2007, 03:30 AM] they put it on the car for a reason.

sctyboy

I think one of the problems here is that on the one hand there is a discussion of improved clutch/shift feel with the CDV removed, and then there's an argument to keep it, because it is designed to save the transmission parts.

So, can we all agree that removing the CDV improves the clutch/shift feel, regardless of how much damage it may, or may not, be doing to the, for example, rear diff?

kenstyle

The CDV was implemented by Honda in the 2004+ model years to protect the somewhat fragile stock diff during hard shifts and/or drag launches. A pitfall to this valve is the decreased longevity of the clutch because the valve would delay the clutch engagement point thus causing more of it to burn off.

With the removal of the CDV, you're now increasing the lifespan of your clutch between shifts (because there is no engagement delay anymore), but you leave the diff more vulnerable to damage during power launches and whatnot.

Basically if you don't really do much drag racing, burnouts, or do powershifts all the time, this valve really serves no purpose. It was Honda's solution to the numerous blown rear diff cases that were associated with the AP1's.

This mod is a must if you are a hardcore track junkie though. The clutch engagement delay is obnoxiously annoying on the track when you're just coming out of a corner.