Howdy everyone,

So I recently got tuned, made 513/376. My clutch is a CC Stage 5 "4-Puck". I have never had an issue with it slipping since I have had it installed. After I picked it up from the shop after getting dyno'd, the tuner told me he made sure launch control worked and he made a few launches.

Here is where me problem is...

The other day I tried to launch the car, and noticed that it continued past my old 6500 limit. Once it reached 7000, close to redline obviously, the car started to inch forward as if it was slipping. It doesnt do that until it gets real high in the RPMs.

Tuner mentioned making sure clutch is indeed in and in first gear, so I tried it again today and same exact thing. Once it got real high rpm it started inching forward. Never puts off burning clutch smell though.

I texted the tuner, and he assured me he will have it looked at tomorrow, but curiosity is killing me. Like I mentioned, changing gears, full out pulls, taking off, etc. it never slips on me. And again, when it happens it never smells like clutch inside or out.

Do you guys think once launch control is set (at 6000) it would be able to do a normal launch without inching forward? Does this sound like a slipping clutch issue?

UPDATE::

Went out and adjusted the clutch pedal as mentioned here, and it worked. It also brough back my launch control. I guess if there is drag the launch control does not think you are still launching. Meh.

Anywho, thanks guys!!

 

have you launched the car before?

it's not a slipping clutch, it's an improperly adjusted clutch. it's dragging when it shouldn't be and will cause premature wear on the clutch

why would your tuner make launches on your car? all he needs to do is make sure the 2-step engages where it should. sounds more like he wanted to have fun in a customer car

 

Sounds more like a your clutch is grabbing than slipping.

 

I have launched it with this clutch, but back when it was stock turbo. Never gotten a good launch with this setup, only tried these two times.

Its all good. he is a good friend and knows I trust him. Beleive me, if it broke they would pay for it.

 

Some clutches will start to engage from centrifugal force. This is the gripe some people have with ACT clutches. When this happens it is difficult to shift at high rpms.

 

For a brief moment I figured that. I thought at that RPM there isnt much that would hold it back. Well get it all worked out tomorrow. Thanks guys!

 

Not to be that guy but... centrifugal force is not a real thing. You mean centripetal force. But yes, this is your problem.

 

Like llDemonll said it's not slipping it's dragging. Bleed and a proper adjustment should take care of it.

 

You are wrong. centrifugal force is a real thing. Definition below.

Moving or directed outward from the center (opposed to centripetal ). Centripetal moving towards the center.

To be truthful I had never heard of that term and had to look it up before I made an *** out of myself like you did to yourself.

Class dismissed.

Back OT OP your clutch is grabbing not slipping. Like an early poster mentioned, at lest from what you mentioned.

 

fail

 

To the OP, it's clutch drag. It happens at higher rpm's where harmonics can begone to make the clutch disk flex. Your clutch pedal needs adjustment (or something else does)7 so that it more fully disngages the clutch.

Read this....

http://www.jackstransmissions.com/pa...kills-synchros





Actually...... Centrifugal force (Latin for "center fleeing") describes the tendency of an object following a curved path to fly outwards, away from the center of the curve. It's not really a force; it results from inertia i.e. the tendency of an object to resist any change in its state of rest or motion. Centripetal force is a "real" force that counteracts the centrifugal force and prevents the object from "flying out", keeping it moving instead with a uniform speed along a circular path.

and.... http://www.physicsforums.com/showthread.php?t=3868

 

so op when you hit 2step your car starts inching forward or it inching forward when you hit real rev limiter?if it inching forward after you hit real rev limiter,you have clutch drag.

 

Class back in because you are wrong!
Centrifugal force is the result of an object trying to fly out but staying in place making it seem that there is a force trying to pull the object back in (and thus giving the feeling of being pushed to the outside of a curve while staying in place). What is really happening is a centripetal acceleration tries to push the object outward (this is caused by a rotational motion). The only thing keeping the object from slipping in line with the centripetal acceleration is the frictional force, as well as the normal force. This is essentially the same as when a car (lets say an F1 car goes around a corner). Do you really think there is a force actively pushing the car towards the inside of the bend when pulling 3+ g's of lateral acceleration? No (kind of but its definitely not a "centrifugal force" as you are calling it). There is friction from the tires and an increased normal force from the aerodynamics. Lateral G's are in fact an expression of centripetal acceleration meaning the car is remaining in place due to the two forces described above, but the car at three G's is accelerating at a rate of 29.4 m/s/s to the outward of the bend. The overall acceleration (the once caused by the friction and normal force) is at a 90 degree angle to the tangential velocity thus the car is actually accelerating towards the inside of the bend (meaning overall acceleration is to the inside of the curve, but not by a "centrifugal force" mind you). Now you may be wondering why did I not use the term centrifugal force anywhere in the description of acceleration around a curve? Well you see thats because there are other forces that account for it meaning that it is not a real force. It is a false force. Feel free to check the internet, or better yet any basic physics text written in the last 100 years. But thanks for your input!
Oh and in case you're wondering scale on this size doesn't matter the centripetal acceleration from a clutch disk is derived the same way as a car going around a curve.
Good thing I actually have an education and don't just check the Internet for definitions. If I did that I would probably make an *** out of myself.

 

Its def clutch drag. It goes to redline and started sragge a few hundred RPM before it

 

Are you on an flat surface when you launch?

Are you slowly raising RPMs and not gassing it?