I was asked to post this here. I'm going to be replacing the CMC on my AP2 and I thought about deleting the CDV at the same time. The thing is I was told that I should not delete the CDV unless I have an AP1 flywheel. Why is that? Thanks

 

Id never heard that. Ive had my CDV deleted for about 3 years now. No issues. Maybe they recommend the lighter AP1 flywheel but its not a requirement to do the modification.

 

1: The CDV is in the slave not the master cylinder

2: AP2 flywheel is significantly heavier than AP1.

I swapped an ap1 slave into my car with the ap2 flywheel and instantly the clutch started to slip. Now, the clutch was most certainly gone, however it didn't slip at all with the ap2 slave. Not sure if it was coincidence, but I have a feeling the delay valve was dampening the clutch enough that it didn't slip. Just a thought from my experience.

 

11+ years on my AP2 without the CDV, no issues.

 

Does an Ap1 CDV an exact replacement to the AP2? It appeared to me that they were a bit different. The feeling is engagement is a lot sharper as you come off the pedal?

 

AP1's don't have a CDV, only 04+ AP2's.

You'll need the AP1 slave cylinder, banjo hose, seal washers, brake line bracket, clip & master-to-bracket hard line.

 

Slave ap1 vs ap2 have different appearance. But functionally one can swap in for the other. Ap1 is cast iron I believe. Painted black. Ap2 is aluminum.

If anything, a mostly worn clutch would be more likely to slip with the cdv intact. Swapping to an ap1 it should grab more authoratively.

 

 

If you remove the CDV you'll have the same slip characteristics you have now - flywheel / pressure plate slip, which has to do with the force the PP applies and the mass of the flywheel.

The CDV is to prevent driveline shock, but a lighter AP1 flywheel will allow the PP to bite better, which is where the slip is happening. CDV regulates the clamping speed, so if you remove the CDV, you just unmask more of the underlying issue, which is that the AP2 stock PP doesn't have enough bite for that 22lb flywheel.

 

FTR, I haven't encountered any slip since removing my CDV. I've also never dumped my clutch from first, my big issue was slipping from 1st to 2nd due to the CDV.