[Z06] bad move on my part, Centerforce clutch
10-08-2008, 10:37 PM
#1
Drifting
Thread Starter
bad move on my part, Centerforce clutch
Thinking that I would improve my car for HPDE's I replaced my stock clutch with a Center force clutch. My Tech said that he's used it on all his customers cars without a problem but I should know that there will be some chatter for a time period, the chatter is getting less as expected. With the Center force I'm hearing all sorts of rattling noises at idle with the clutch let out but goes away when the clutch is depressed. Also, if I don't let the clutch out and add throttle perfectly I hear a metal grinding and scraping noise as I roll forward or reverse but goes away as rpm increases. I never had this happen with my stock clutch and I've been driving manual transmissions for over 30 years and never had this happen. Has anyone had this happen
10-08-2008, 10:44 PM
#2
Burning Brakes
Several people on this forum have this clutch, you should get some reply. It will be intresting to hear what some of the guys have to say.
I hope you do not have to go into it again.
good luck.
I hope you do not have to go into it again.
good luck.
10-09-2008, 08:44 AM
#5
Melting Slicks
I have same issue only sitting at idle with foot off clutch. It is called gear rattle. The stock clutch has some kind of vibration damper whereas your clutch does not. If car is moving say in neutral even say 5 mphwith foot off clutch it goes away becuse gears are now moving.
10-09-2008, 10:27 AM
#6
Le Mans Master
I have same issue only sitting at idle with foot off clutch. It is called gear rattle. The stock clutch has some kind of vibration damper whereas your clutch does not. If car is moving say in neutral even say 5 mphwith foot off clutch it goes away becuse gears are now moving.
10-09-2008, 11:50 AM
#7
Drifting
Thread Starter
I spoke with Centerforce and my tech, both stated that the rattling at idle and the metal on metal noise as you release the clutch and give it throttle are totally normal. So the tittle of my thread is wrong, I made the right choice for a performance clutch and shouldn't drive my tech crazy
10-09-2008, 12:28 PM
#8
Safety Car
Member Since: Apr 2006
Location: Ventura, CA President GOCC
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I spoke with Centerforce and my tech, both stated that the rattling at idle and the metal on metal noise as you release the clutch and give it throttle are totally normal. So the tittle of my thread is wrong, I made the right choice for a performance clutch and shouldn't drive my tech crazy
10-09-2008, 01:27 PM
#9
Burning Brakes
I put a CF dual friction clutch on my '03 Cobra, and have never noticed any of the symptoms you describe. Maybe that's simply due to differences inherent in Ford vs. Chevy clutches. Is yours a DF model? The stock clutch has been fine in my Z.
CW
CW
10-09-2008, 08:58 PM
#11
I had a Centerforce clutch put in my 08 Z06, and I too have the embarassing rattle at idle with the clutch pedal out. I hate it. I wish the people who already had the clutch installed would of warned the rest of us about this. I heard that the Ram clutch did this but only heard good things about the Centerforce, so I went with it. For now, I leave the clutch pedal in most of the time while at a light.
Dissapointed that the aftermarket cannot make a quiet clutch. Maybe the ZR1 clutch maker will come out with something.
Dissapointed that the aftermarket cannot make a quiet clutch. Maybe the ZR1 clutch maker will come out with something.
10-09-2008, 09:11 PM
#12
Former Vendor
The lighter weight clutch do increase drivetrain noise. The splines on the tube and the gears in the tranny is what you are hearing. These are all "normal' sounds after installing a trick flywheel and pressure plate. The cars because of thier sporty nature will transmitt the feeling into the driver.
I don't know anything about the centerforce clutches as of late.
You guys think these are loud, go listen to a ZF out of a 90's vette with a little flywheel. They sound like a tin can full of marbles.
Some cars will be louder then others...
Randy
I don't know anything about the centerforce clutches as of late.
You guys think these are loud, go listen to a ZF out of a 90's vette with a little flywheel. They sound like a tin can full of marbles.
Some cars will be louder then others...
Randy
10-09-2008, 09:14 PM
#13
Former Vendor
[QUOTE=IRVINEC6;1567409290] For now, I leave the clutch pedal in most of the time while at a light.
QUOTE]
This is very hard on the throwout bearing. You should just get louder exhaust to help drone the noise out.
Randy
QUOTE]
This is very hard on the throwout bearing. You should just get louder exhaust to help drone the noise out.
Randy
10-10-2008, 12:10 AM
#14
I had the Fidanza twin 6.5 with a lightweight flywheel and have the same problem. I am having the ZR1 clutch installed tomorrow. I will say that the ZR1 clutch/flywheel is substantially hevier than the stock Z06 clutch (approx 60-65 lbs) and my Fidanza (32 lbs). I would guess it at 100-125 lbs, but will weigh it tomorrow. I'll post results next week.
10-10-2008, 12:27 AM
#16
The Fidanza unit I had was a balanced unit. The noise was gear lash coming form the tranny. The vibrations are transferred through the lighter unit directly to the gear slop in the tranny.
10-10-2008, 01:16 AM
#17
Drifting
Thread Starter
10-13-2008, 12:30 PM
#18
Drifting
The noise in the CF clutch is from the counterweights on the pressure plate. When the motor is at idle and the clutch is not depressed the weights are at rest, when the rpm's increase the weights are pushed outward and come under tension and stop rattling.
The weights are there to keep the pedal from sticking to the floor at very high rpm's, you can remove the weights and the clutch will function like the stock unit.
I have a CF2 and can hear the same thing from time to time.
The weights are there to keep the pedal from sticking to the floor at very high rpm's, you can remove the weights and the clutch will function like the stock unit.
I have a CF2 and can hear the same thing from time to time.
10-13-2008, 09:35 PM
#19
Le Mans Master
The noise in the CF clutch is from the counterweights on the pressure plate. When the motor is at idle and the clutch is not depressed the weights are at rest, when the rpm's increase the weights are pushed outward and come under tension and stop rattling.
The weights are there to keep the pedal from sticking to the floor at very high rpm's, you can remove the weights and the clutch will function like the stock unit.
I have a CF2 and can hear the same thing from time to time.
The weights are there to keep the pedal from sticking to the floor at very high rpm's, you can remove the weights and the clutch will function like the stock unit.
I have a CF2 and can hear the same thing from time to time.
BINGO. And all the other noises are normal.Jim
10-14-2008, 05:31 PM
#20
Safety Car
Get ready to buy a TOB and slave and pay labor to replace it.Incorrect installed hieght IMOP.Same happened to mine,bought a lift so I can do it myself.Car has sat another 6 wks.At least keeps the miles down.LMAO