weeebell

iTrader: (1)

My MY99 Impreza was remapped by AndyF late October to 320bhp and as expected, the clutch started slipping after 2 weeks.

So off I went to my local garage (who is reputable in my area. Rally prep/track cars etc) and an Exedy clutch was fitted.

They told me it was Exedy's version of a standard clutch and sent me on my way.

7 weeks later the clutch started slipping and back it went to have another fitted under warranty.

Now, my mates bugeye, which was remapped roughly the same time as mine, to the same torque and also had to have a new clutch fitted at roughly the same time as mine, is starting to slip again.

Both cars were fitted with skimmed flywheels NOT new ones, could this be the problem?

I was under the impression that a standard clutch could take this power easily.

So basically, is it,
Crappy clutches
Skimmed flywheels
Garage fault

Your thoughts much appreciated

Eprom

What torque is it producing, this would be the deciding factor,
I would go for the Exedy organic uprated if you have that power, was the friction plate worn to the rivets?
If not, it could just be slipping, due to not enough clamping force from the pressure plate.

Gear box next me thinks.

weeebell

iTrader: (1)

The torque is 320lbs/ft.
Im thinking about selling my turbo and gearbox before is explodes and going for a paddle clutch, P1 box and bigger turbo. All depends if/when it goes again

T5NYW

iTrader: (4)

For a Classic or newage WRX it's the same 230mm clutch but the standard exedy clutch kit (in silver box) is OK up to 280 Bhp OEM 230mm clutch is Ok to 300bhp IMHO

As not that much difference in the Price most fit the uprated kit in the (pink box) 380 Bhp

Speak to David at APi he is very knowledgable af testing a variaty of Exedy cluches

dunx

iTrader: (3)

One of the locals had exactly this problem with a so-called Exedy clutch fitted by a numpty local garage....
It was rubbish and lasted weeks.... he had to go to Scoobyclinic for it to be done properly....

Not saying that the up-rated stuff isn't excellent, but so many cars are modded now, the standard spec. isn't much use ! IMHO... careful !

Dunx

T5OLF

iTrader: (4)

I bought my Exedy uprated clutch from API and I'm sure he rates them at 400/400 but I may be wrong. The clutch has been faultless for 2 years @ approx 300 pounds of torque. It is lighter than the oe one that failed, even the wife can drive it with no problems.......never juddered once.

Have you checked that your slave cylinder ? it may be worn. What happens is fluid gets behind the piston and stops the clutch from fully engaging. Andy F showed me this problem when he mapped my car. I had no clutch slip until we started turning the boost up and then it slipped like mad.....on a new clutch. He just undid the bleed nipple and that fixed it for the day. A new fixed it for good..just a thought.

harvey

iTrader: (48)

First off it is torque and NOT bhp that kills clutches.
It sounds like you have the standard Exedy but what you need is the UPRATED version.
Do not go for the paddle clutch. If it is fierce it will shock your transmission and goose your gearbox in next to no time.
There is a little trick just to give you a little bit of margin and that is to machine 1 or 2 mm off the outside circumference of your flywheel exactly where the pressure plate sits on the flywheel.
the effect of this is that the clamp pressure is increased and improved clamp pressure is what you need for improved torque.
With increased torque, clutches will slip, not because the clutch plate is worn but because the clamping pressure is insufficient.

weeebell

iTrader: (1)

Well thats clutch number two starting to slip now.
Where is the best place to buy an uprated Exedy clutch, preferably the one in the pink box and how much should this one cost?

Ideally I'm looking for one which will withstand 380bhp with similar torque as i'm planning on changing the 'box to a V5 Sti/P1 number and fitting another turbo in the future.

APIDavid

iTrader: (4)

Call me Monday, l'll sort you [ & your mate ] out. Mini group buy if you like.

David APi

APIDavid

iTrader: (4)

No need for all this What you have is already adequate. OR will have if you buy my clutch.......

David APi