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Clutch Judder on new clutch
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Old 16 Nov 2009, 08:17 PM   #1 (permalink)
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Unhappy Clutch Judder on new clutch

Hi,
Just had a new Zero/Sports Street Clutch Kit and Zero/Sports Chrome Molly Flywheel installed on my 53 plate Sti. Have a couple of questions that I would like an answer to please.

The car judders violently if you don't give it lots of revs is this normal?
When reversing, the clutch stinks and the car bucks violently , is this also normal?

I am concerned as my girlfriend will be using the car a couple of days a week, and i am finding the clutch awful so far. I also have to reverse into my parking space and having to rev the crap out of it will annoy the neighbors somewhat (as if my afterburner exhaust didn't enough already)

Thanks
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Old 16 Nov 2009, 08:53 PM   #2 (permalink)
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Re: Clutch Judder on new clutch

What's the weight of the flywheel as this will cause violent judder if very light.

Andrew
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Old 16 Nov 2009, 09:33 PM   #3 (permalink)
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Re: Clutch Judder on new clutch

Its 4.7 kgs
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Old 16 Nov 2009, 10:13 PM   #4 (permalink)
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Re: Clutch Judder on new clutch

4.7 is very light, that's racing weight. My brother has a 6.1kg on his classic and that judders like a bugger. He had the option of going for a 4.3kg flywheel but was strictly told it was only for racing applications and should not be used for a road car.
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Old 16 Nov 2009, 10:18 PM   #5 (permalink)
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Angry Re: Clutch Judder on new clutch

You are F****** joking mate. Here is the description:

"Specifically set at 5.3kg to enhance the EJ20 turbo engine characteristics, this chrome molly flywheel was designed not only for superb accelerator response, but for easy everyday driving. Installation is recommended at the same time as clutch replacement.

6MT 4.7kg 283.46 1138009
5MT 5.3kg 268.83 1138003
"
So are they talking BS? I was oping the judder and non drivability was just the bedding in period........
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Old 16 Nov 2009, 10:31 PM   #6 (permalink)
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Re: Clutch Judder on new clutch

i can only comment on the weight of my brother flywheel and the advice he was given and that was for a classic 5MT and not a 6MT that have lighter OEM flywheels. it could be another issue, but i bet the flwheel is at least partly to blame. (Don't shoot the messenger mate, i'm just making an educated guess).
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Old 16 Nov 2009, 10:44 PM   #7 (permalink)
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Re: Clutch Judder on new clutch

Ok thanks for your quick reply.

The clutch also bites at the very top of the pedal, i would have thought a new clutch would bite near the floor??? This makes the whole fealing of it even stranger and almost forces you to slip the thing.
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Old 16 Nov 2009, 10:49 PM   #8 (permalink)
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Re: Clutch Judder on new clutch

the clutch bite point should be adjustable on blobeye scoob but not sure how. The clutch itself should not need bedding in it should just work without issue.
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Old 16 Nov 2009, 10:58 PM   #9 (permalink)
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Re: Clutch Judder on new clutch

ummm not to good then. I cant understand how they can make those comments on the part when its the complete oposite. Think i will be giving the garage a call in the morning then..

Thanks Andrew
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Old 16 Nov 2009, 11:20 PM   #10 (permalink)
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Re: Clutch Judder on new clutch

Clutch Might be worth having a look at this but as Andrew said a flywheel problem I think to heard the odd story about clutch judder
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Old 17 Nov 2009, 08:24 AM   #11 (permalink)
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Re: Clutch Judder on new clutch

Did you replace all the parts ?or just the pressure plate/clutch plate?
Have you tried a launch start yet to mate the surfaces?
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Old 17 Nov 2009, 06:53 PM   #12 (permalink)
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Re: Clutch Judder on new clutch

Thanks for all your replires guys~!

Drove on a 250 mile round trip today, they clutch is now biting at the very top of the pedal. Surely thats not how it should be. What are you thoughts
Thanks
Martyn
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Old 17 Nov 2009, 07:37 PM   #13 (permalink)
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Re: Clutch Judder on new clutch

prolly bed in a bit
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Old 20 Nov 2009, 04:33 PM   #14 (permalink)
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Re: Clutch Judder on new clutch

Quote:
Originally Posted by redscoobie View Post
Hi,
Just had a new Zero/Sports Street Clutch Kit and Zero/Sports Chrome Molly Flywheel installed on my 53 plate Sti. Have a couple of questions that I would like an answer to please.

The car judders violently if you don't give it lots of revs is this normal?
When reversing, the clutch stinks and the car bucks violently , is this also normal?

I am concerned as my girlfriend will be using the car a couple of days a week, and i am finding the clutch awful so far. I also have to reverse into my parking space and having to rev the crap out of it will annoy the neighbors somewhat (as if my afterburner exhaust didn't enough already)

Thanks
Hi,
Andrews bro here... sorry to hear about your scooby judder problems

With light weight flywheels the judder problem is common, on very light flywheels this is amplified (especialy with sport clutches)

I went for a 6.1 kg ACT flywheel and Exedy high clamp pressure plate and sport friction plate... it judders... but by increasing the revs before the bitting point this smooths things out a lot.. but quick of the line

When in heavy traffic it can be a pain... but with practice it becomes easier... reversing also causes some 'friction plate burn'.... it's not an easy drive for the uninitiated

These are the prices we pay for quicker engine speed increase... more performance often can mean less everyday driveability

But horses for courses.... my classic is track bound and the judder does not bother me in the slightest... it is the price I was willing to pay

Think your issue is with description of goods and how they would perform?

Only way to resolve is to contact the manufacturer/supplier and ask them why? and what they suggest... then you will find out what they offer in the form of customer service... let us know how you get on please

Hope this helps

Nobby Clark
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Old 29 Nov 2009, 07:34 PM   #15 (permalink)
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Re: Clutch Judder on new clutch

Hi Guys,

Happy to report the clutch is now driveable, just took some getting used too.

One problem though, i launched the car today(nice and wet today!). As I came off the clutch, there was a pop under the car, no tyre spin, and some smoke came from the drivers side wheel arch, looked white, but could have been steam. It stank afterwards of a mixture of burnt clutch and plastic. I pulled over straight away and let it cool off.

The car drives ok still but i cant help feeling i have broken something. The smell is slowly oing away after 20 or so miles. The clutch feels ok but i think its slipping a little when pulling away.

Any ideas? Was the smoke from the clutch because I assed up the launch? Or is it likely i have broken something,

Thanks
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