Clutch Slip After Remap.

[rob fletch]

Hi,
Ive Just Had My A3 130 Sport Chipped Up Tp 170,now Getting Some Clutch Slip In 5th And 6th,anybody Help.

[Clinterous]

Maybe a sign the clutch was worn anyway and the remap has highlighted the weakness.

That said, how much torque do you have after remap?

[audipersempre]

I guess you ahve a lot more torque going through the transmission now which will test a weak clutch. Could be you need to replace with a new standard unit or consider an upgrade. You don't say how many miles the car has covered, when it last had a clutch replacement or what torque increase your remap produced so it's difficult to say.

It's more the torque that will kill your transmission not so much the brake horse power.

[dod1e]

Mine slipped after a remap with 20k on the clock. It would do it mainly in 4th gear and above from around 1700-2000 rpm, casically where the turbo kicked in and the torque surged.

I couldnt believe the clutch would be worn out by then, so did some research, and it turns out the clutch plate was glazed or polished, thus reducing the friction coefficient.

The solution is to burn of the glaze by selecting top gear, reving the engine with the handbrake on and letting out the clutch fully, keeping your foot on the throttle. I noticed a definate dip in the revs after the glaze was burned off after maybe 4 or 5 seconds and then dipped the clutch. wouldnt want to go any longer for obvious reasons, and i wouldnt rely on noticing an increase in drag, i did but have only done it the once.

Hasnt slipped since and i can use all the power.

DOnt know how this will affect clutch life, obviously it will be reduced by a fair bit I would imagine, car has now done 63k, so over 40 k since i did this, and no signs of it wearing out yet.

My clutch is heavy though, whether because of this or not i couldnt say, i only noticed after someone pointed it out to me and i test drove another Golf.

So, this will likely cure your clutch slipping problem, unless you think the clutch might actually be worn, but do it at your own risk.

[rob fletch]

386nm or 285lbs per foot.

[rob fletch]

all,
car has done 71000mls and remap has increased torque to 285lbs per foot or 386nm.

[Clinterous]

Did they measure the torque on a rolling road, or is that estimated?

But with that amount of torque the standard clutch should handle it (mine is pumping out 304lb ft of torque on the original clutch and car almost at 190K).

Suspect you have a weak clutch

[dod1e]

Suspect you have a weak clutch

Yes like i said in my post, it's quite likely that the friction plate has become polished causing a lower friction coefficient, therefore a lower torque capacity.

Try googling this and you will find numerous posts on other forums detailing this.

[rob fletch]

cheers everone,i think ill try burning the glaze off the clutch first,then if that dont work ill go for changing the clutch for an uprated one.

ide hope the burning off works due to the fact that ive just saved up my pennies for a full milltech system for the a3 and that would give me more joy than spending it on a new clutch.


anyone have any info on exhaust systems for tdi's? i am going to fit a cat bypass pipe from milltech first.
rob.

[ChuckH]

Mine slipped after a remap with 20k on the clock. It would do it mainly in 4th gear and above from around 1700-2000 rpm, casically where the turbo kicked in and the torque surged.

I couldnt believe the clutch would be worn out by then, so did some research, and it turns out the clutch plate was glazed or polished, thus reducing the friction coefficient.

The solution is to burn of the glaze by selecting top gear, reving the engine with the handbrake on and letting out the clutch fully, keeping your foot on the throttle. I noticed a definate dip in the revs after the glaze was burned off after maybe 4 or 5 seconds and then dipped the clutch. wouldnt want to go any longer for obvious reasons, and i wouldnt rely on noticing an increase in drag, i did but have only done it the once.

Hasnt slipped since and i can use all the power.

DOnt know how this will affect clutch life, obviously it will be reduced by a fair bit I would imagine, car has now done 63k, so over 40 k since i did this, and no signs of it wearing out yet.

My clutch is heavy though, whether because of this or not i couldnt say, i only noticed after someone pointed it out to me and i test drove another Golf.

So, this will likely cure your clutch slipping problem, unless you think the clutch might actually be worn, but do it at your own risk.

Slipping or burning the clutch plate will not result in a heavy pedal The cause for a heavy pedal is the springs in the pressure plate gettin old and stiff resulting in more pressure needed to make them work !