So i have a centerforce dual friction clutch. I notice under very hard accelerating, over 5500 rpms, if i try to **** fast, the clutch pedal does not want to return all the way up from the floor.
After the rpms decrease, the pedal comes back up.
Is this a sign that it is worn out?

at low rpms, it is fine.

the clutch is about 9 years old and has about 20k very hard miles on it.

 

Internal or external slave?
Cable?

That sounds more like a binding issue.
Check for play and check for anything that might be suspect of a bind

 

Do you still have the under-dash clutch assist spring installed? If so, remove it.

 

Other than what's been mentioned...is there any chance the input shaft has been twisted? If your sig is right you have a t5, so it's possible...

 

yes, i do have a T5. it is very new and was custom built for my set up.

I have an extrenal slave. i will take a look for binding but there is not really mutch to bind.

i did remove the under dash assist spring when i installed the hydo clutch.

if i take it apart, i want to have a clutch on hand to install since mine is 10 years old and has had a ton of use. please recommend, i am listening.

i have really liked the dual friction but it is a little spendy these days

 

well talk to modern driveline.
Im running their 10.5" full kevlar clutch. It has great holding power and is much smoother engaging than the king cobra I use to run.

Tell them what you are doing your hp requirements and their thoughts on the kevalr system in your case.

http://www.moderndriveline.com/