Look what SPEC did for me. - Page 3

mustangmuscle · 03-21-2006, 11:22 AM

Ok....please educate the ignorant--->me

Why do clutches "chatter"?
And, does it cause damage when it occurs?

Thanks!

TheJeanyus · 03-21-2006, 12:43 PM

I believe it's actually the throw out bearing chattering. My stock clutch does it, and it's getting worse and worse.

Italian LX · 03-21-2006, 12:48 PM

Quote:

Originally Posted by TheJeanyus

I believe it's actually the throw out bearing chattering.

No, it has to do with the friction material and it's ability to 'grab' better. I would imagine it's similar to why some high performance brake pads squeal real bad during low-speed braking.

mustangmuscle · 03-21-2006, 12:51 PM

Quote:

Originally Posted by TheJeanyus

I believe it's actually the throw out bearing chattering. My stock clutch does it, and it's getting worse and worse.

Ok.....I know our cars have tob issues, but....

i hear guys with brand new set-ups (clutch, pp, tob, etc.) saying stuff like "yeah the clutch really grabs, but chatters alot".....???

TheJeanyus · 03-21-2006, 12:53 PM

Meh, I'm sure I couldn't here it over my exhaust anyway.

coupe · 03-21-2006, 01:02 PM

The friction material is "sticky" and when the pressure plate "clamps" on it, everything wants to grab and hold...if you're softly trying to engage a very high-performance clutch, it wants to grab, then slip, grab, slip, etc...until you dump it and it holds. That grab/slip condition is the chatter, basically bouncing the friction material off the surfaces.

Think of it like this: push down hard on a book and slide it across table...it's smooth. Not very good friction coefficient. Now, push and slide your hand...it sometimes does this "chatter." Next, do three fingers while pushing hard... they really dont slide well. This is the theory behind a "puck-style" disk. Smaller area but same force makes very high pressure...but it can be "chattery."

86GT · 03-21-2006, 01:44 PM

This is exactly what I was told. Good explanation. I have the stage 3 clutch and it does chatter when I try to let the clutch out lightly for a smooth take off. It takes time to get use to, but if I start to feather the clutch and then drop it, it seems to not chatter as mutch.

I originally thought that something was wrong too. I have put in many clutches but none of this torque rating. I resurfaced the flywheel and everthing. I was just expecting a factory clutch feel with better performance.

You have to give something to get something.

Italian LX · 03-21-2006, 01:53 PM

Quote:

Originally Posted by 86GT

You have to give something to get something.

I'm now trying to get used to this noisy TKO.

86GT · 03-21-2006, 03:43 PM

Quote:

Originally Posted by Italian LX

I'm now trying to get used to this noisy TKO.

Mine is not noisy. It is just as quite as the stock T5. It just has a stronger neutral return spring.

Italian LX · 03-21-2006, 03:49 PM

Quote:

Originally Posted by 86GT

Mine is not noisy. It is just as quite as the stock T5. It just has a stronger neutral return spring.

Mine emits a whine in 5th gear above 2400RPM. It also sounds awful when idling in neutral... almost as if Dale stashed some of his walnuts in it.

03-21-2006, 11:22 AM	#21
mustangmuscle Senior Member Join Date: Mar 2005 Location: Auburn Posts: 792	Re: Look what SPEC did for me. Ok....please educate the ignorant--->me Why do clutches "chatter"? And, does it cause damage when it occurs? Thanks! __________________ 04 Red Fire Cobra JLT RAI MGW Shifter Bassani cat-back Bassani catted-X MM FLSFC's BF IRS Brace Lukem80 Special Edition Hi-perf springs BF 2.76 S/C pulley SCT XCAL2 DiabloSport MAFia NGK TR6 Plugs Steg Stage 4 Eaton Afco D/P H/E Metco 2# Lower KB BAP SPEC 3+ clutch w/SPEC steel fw 60# inj's 491rwhp/504rwtq

03-21-2006, 12:43 PM	#22
TheJeanyus Administrator Join Date: Dec 2004 Location: Huntsville, AL Posts: 14,774	Re: Look what SPEC did for me. I believe it's actually the throw out bearing chattering. My stock clutch does it, and it's getting worse and worse. __________________ 1998 Mustang GT Coupe - World's Slowest Racecar 2005 Toyota 4Runner SR5 V8 2013 Volkswagen Jetta Sportwagen TDI

03-21-2006, 12:53 PM	#25
TheJeanyus Administrator Join Date: Dec 2004 Location: Huntsville, AL Posts: 14,774	Re: Look what SPEC did for me. Meh, I'm sure I couldn't here it over my exhaust anyway. __________________ 1998 Mustang GT Coupe - World's Slowest Racecar 2005 Toyota 4Runner SR5 V8 2013 Volkswagen Jetta Sportwagen TDI

03-21-2006, 01:02 PM	#26
coupe Super Moderator Join Date: Dec 2004 Posts: 6,313	Re: Look what SPEC did for me. The friction material is "sticky" and when the pressure plate "clamps" on it, everything wants to grab and hold...if you're softly trying to engage a very high-performance clutch, it wants to grab, then slip, grab, slip, etc...until you dump it and it holds. That grab/slip condition is the chatter, basically bouncing the friction material off the surfaces. Think of it like this: push down hard on a book and slide it across table...it's smooth. Not very good friction coefficient. Now, push and slide your hand...it sometimes does this "chatter." Next, do three fingers while pushing hard... they really dont slide well. This is the theory behind a "puck-style" disk. Smaller area but same force makes very high pressure...but it can be "chattery." __________________ " If you can't explain it simply, you don't understand it well enough. " - Albert Einstein

03-21-2006, 01:44 PM	#27
86GT Member Join Date: Mar 2005 Location: Sacramento California Posts: 449	Re: Look what SPEC did for me. This is exactly what I was told. Good explanation. I have the stage 3 clutch and it does chatter when I try to let the clutch out lightly for a smooth take off. It takes time to get use to, but if I start to feather the clutch and then drop it, it seems to not chatter as mutch. I originally thought that something was wrong too. I have put in many clutches but none of this torque rating. I resurfaced the flywheel and everthing. I was just expecting a factory clutch feel with better performance. You have to give something to get something. __________________ EEC Analyzer A9M, TwEECer, 306ci, 73mm C&L w Tuner Tube, Cobra Intake, 42# inj, Edelbrock 6037, E303 cam, 155 fuel pump, FPR, 70mm TB, E-Fan, 3.55 gears, Powerdyne 9psi actual 5psi...way more.