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Thread: FX500 chatter

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Posts: 1-10 of 68
2014-04-29 06:04:45
#1
FX500 chatter
I see all these people praising the fx500 and saying its fine for daily stop and go.I ahve a few questions and looking for some input on this.

I have recently aquired a car with one that feels great driving, except the chatter ...its horrible. Mostly just from a dead stop,or slow roll 2nd gear.
I have been able to baby a chattering clutch in the past and it can eventually get better.
However,I just wonder if other have these issues .I did notice the CM website says it will chatter.
2014-04-29 06:20:36
#2
at nearly 10k now lumpys barely chatters any more, its also how you drive, more gas + get off the clutch quicker = less chatter

i have 150 miles on mine an its not bad either.. i also think the flywheel plays a role in it, the flywheel lumpy has now an my flywheel look better then the one lumpy used first which did seem to chatter more.. we also rev match our down shifts, mine doesnt do it but lumpys makes a odd hooonk sound when down shifting without rev match, it did that with the other flywheel too tho.
2014-04-29 10:09:28
#3
I'm not sure if the fx500 has different disc options but my spec stage 5 had a few different discs that fit. I'm running the highest hp option, solid disc with iron pads. When starting out in first gear it sounds like my ve is eating a cat. I don't mind it because it dead hooks in every gear event clutch kicking it.

PS. You got a new toy and didn't bring it to the track? Shame on you...lol
Last edited by se200 on 2014-04-29 at 10-15-06.
2014-04-29 20:35:43
#4
Mine does not chatter at all. Learning how to drive that clutch takes a little time.
2014-04-29 20:42:26
#5
indeed, an like i said once they break in they get better..

they do have different discs, 4 puck an 6 puck, i went with 6 for both lumpy an my car.
2014-04-29 21:23:23
#6
Originally Posted by se200
I'm not sure if the fx500 has different disc options but my spec stage 5 had a few different discs that fit. I'm running the highest hp option, solid disc with iron pads. When starting out in first gear it sounds like my ve is eating a cat. I don't mind it because it dead hooks in every gear event clutch kicking it.

PS. You got a new toy and didn't bring it to the track? Shame on you...lol


haha...yeah I was driving out of state to get it on the Sunday after...I had to leave at 6am so going to orlando the night before was off the table.I have some issues to work out before the car will see much driving...let alone track time.
But I still have my ve nx,so maybe I will get out there with it.
At this point ,I am getting into convention mode,so probably no track before Ohio.
Gotta start eating Ramen noodles and sell off some parts to afford the trip.
I am
2014-04-29 21:51:04
#7
Originally Posted by cortrim1
Mine does not chatter at all. Learning how to drive that clutch takes a little time.


I realize that there is a learning curve on any different clutch setup,and trust me after 6 hours driving and about an hour in stop and go on 95 at one point for construction,I got used to the clutch.
I never stalled it,and if you are rolling even the slightest bit,it can be smooth .Its the taking off from a dead stop thats a killer.Creeping in stop and go is tricky to say the least.
After that long stop and go bullshit,it did seem a little better .
Also its not anywhere near as bad in reverse so I am not gonna worry too much about it right now.The front dogbone mount is needing replaced,so I am pretty sure its aggravating the chatter going forward.
2014-04-29 22:19:22
#8
I noticed as the clutch warms up it gets easier to operate smoothly. It always takes me a few minutes of driving to get used to that clutch after not driving it for a while. Stop and go traffic is real tough. I hit a bunch last year on the way to the convention. At least the pedal effort is near stock.
2014-04-29 22:31:27
#9
Originally Posted by cortrim1
Learning how to drive that clutch takes a little time.


It does. I stalled it the first time I went drive it after I put it in last month, and I've been driving SR20s with relatively tough clutches with the Fidanza lightweight flywheels/underdrive crank pulleys for years. This is my first unsprung clutch though.

I can only hear chattering when I first start it up, pop the hood and get out and stand there at the engine bay, but once I close the hood and get back in the car, as soon as I push in the clutch and put it into 1st gear the sound is gone. I don't notice it much at all driving it either, but then again I also have a 3" full exhaust w/ no cat to a Magnaflow that at certain speeds & RPM combinations can be as loud as a jetliner passing just overhead. In a matter of # of decibels, I'm actually not exaggerating.
2014-04-29 23:52:26
#10
Originally Posted by cortrim1
I noticed as the clutch warms up it gets easier to operate smoothly. It always takes me a few minutes of driving to get used to that clutch after not driving it for a while. Stop and go traffic is real tough. I hit a bunch last year on the way to the convention. At least the pedal effort is near stock.

Agreed warmed up is better....Yeah,pedal effort is not an issue ,especially since its hydro
Originally Posted by Storm88000
Originally Posted by cortrim1
Learning how to drive that clutch takes a little time.


It does. I stalled it the first time I went drive it after I put it in last month, and I've been driving SR20s with relatively tough clutches with the Fidanza lightweight flywheels/underdrive crank pulleys for years. This is my first unsprung clutch though.

I can only hear chattering when I first start it up, pop the hood and get out and stand there at the engine bay, but once I close the hood and get back in the car, as soon as I push in the clutch and put it into 1st gear the sound is gone. I don't notice it much at all driving it either, but then again I also have a 3" full exhaust w/ no cat to a Magnaflow that at certain speeds & RPM combinations can be as loud as a jetliner passing just overhead. In a matter of # of decibels, I'm actually not exaggerating.


I am not sure if you know what I am talking about when I say"chatter"
Its not noise,it feels basically like getting wheelhop as you engage the clutch.Like the dassh shakes and everything else like a mofo as you engage.
On a typical street type oem style clutch,chatter is caused by improper break in or excessive slipping or riding of the clutch(like girls like to do,lol)

In this situation,I dont think its a break in or improper use(slipping,riding the clutch,etc).I think its just this clutch,combined with a blown dogbone that allows additional motor movement,aggravating the chatter that is inherent in an agressive unsprung clutch.
Just taking off,shifting,driving,etc is fine. Try to crwl a couple fet and stop over and over...not fun at all.
Fortunately I live in the country so it wont be an issue often.
Last edited by eggman on 2014-04-29 at 23-54-19.
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