i only have 100 miles on my new clutch. but a tuning session is coming up fast and was wondering if it was ok to get tuned still?

i always thouht a clutch break in period was just not to pop the clutch and risk glazing clutch.

but is it possible for the clutch to slip on the dyno under boost if its not broken in all the way?

I am in the same boat. I was told not to dyno the car until after the break in period.

JMC

Time for a long road trip.

Time for a long road trip.
:werd:

Time for a long road trip.
no highway miles :nono

break in period needs stop and go traffic lol. i thought about that already.

oh well ill just wait until another month

Yep, you need a ton of shifts....Keep on shifting my brother :D

JMC

clutch break in is a myth. Just dont start droping the clutch on a brand new one and you will be fine.

clutch break in is a myth. Just dont start droping the clutch on a brand new one and you will be fine.Who started this myth? Clutch break-in time=wasted time before you realize it still won't hold the power you make.:D ///J.T.///

I think on BMWs last bulletin on clutch break-in calls for 800-1000 shifts.

I think on BMWs last bulletin on clutch break-in calls for 800-1000 shifts.Is that with a stock BMW clutch or are they speaking for an aftermarket High performance model? ///J.T.///

break-in calls for 800-1000 shifts.shifty 1,shifty2,shifty3,shifty4,shifty5..........:mad ///J.T.///

I think it depends on what type of clutch.Organic clutches you have break them in with at least 800 miles of easy driving. On a ceramic clutch your not supposed to slip the clutch at all to prevent glazing or galling the flywheel so how does one break it in properly? I had less than 7 miles on my ceramic clutch and took it straight to the dyno with no problems.
Any other opinions on this.?

I think it depends on what type of clutch.Organic clutches you have break them in with at least 800 miles of easy driving. On a ceramic clutch your not supposed to slip the clutch at all to prevent glazing or galling the flywheel so how does one break it in properly? I had less than 7 miles on my ceramic clutch and took it straight to the dyno with no problems.
Any other opinions on this.?
You're not? I slip mine all the time..

Is that with a stock BMW clutch or are they speaking for an aftermarket High performance model? ///J.T.///

It's meant for the clutch kits with the SAC feature (Self-Adjusting Clutch) that was introduced in certain 99 models and all models after that.

the Z8 and M5 OEM clutch kits call for to shift gears often around 3500-4000rpms.

Clutch break in is needed. Or the clutch won't hold under pressure.

For the time you should break it in and to slip or not to slip is up to you.

I have always been told to not get it hot or slip it for any time. And to drive it over 800 miles. Because the 2 things the kills a clutch the fastest is slipping it (getting it hot) and dropping the clutch to cause massive pressure on it.

And again its up to you. Its your money and your time.

There is no such thing as a clutch break in period.

There is no such thing as a clutch break in period.


Thats not what Rob Levision at UUC told me when I bought a performance organic. I tend to trust what he says. Especially since I was on my back in the garage doing the install. Not something I want to have to do again because of a little impatience.

JMC

Sorry, I can't stand it anymore.

For tuning and or dynoing the car, who the hell cares how few miles are on the clutch. You're not going to be slipping the clutch, are you? Last time I checked, an dyno pull was done in one gear with no shifting during the run. There is no way that this is going to damage it or affect the break-in (if there is such a thing) in any way.

Even WOT runs on the street aren't going to do jack to the clutch if you stay in one gear (4th gear pull, for example). Hell, even a day at an HPDE won't be a problem if you shift gently. If you shift slow enough that the revs are roughly matched when you release the clutch, there's really no wear to speak of taking place.

The only time I'd give a clutch break-in any thought at all would be if I was going to run hard at a track event/race, or if I was going to do do anything remotely resembling a drag race (that includes any type of quick and/or hard shifting).

I honestly never understood why people wait to break in the clutch before doing a simple single-gear WOT run or dyno. Clutches simply don't wear unless they are slipping. If it's slipping during a WOT run, dyno pull, or tuning session, you've got bigger problems than breaking-in the clutch.

Chris

Yeah..I think it is a myth also...
I think the manufacturers use this as an excuse , so if the clutch slips because it is either "inferior" for the power output described. or just "defective" in some way. they can blame the famous "you do not break it in properly, did you?' :rolleyes

1000 miles to break in a clutch? seems outrageous to me...

I put in my AA clutch with their lightweight flywheel, drove it gingerly, shifting alot for about 10-15 miles, and then beat the 'living snot out of it", and it has been in there for 4 years ~ 12,000 miles or so....And I drive hard... it has been nothing short of superb....
Never slipped..ever...:)

just my 2 cents...

my AA clutch has been the best, longest lasting clutch, Ive ever had. I enjoy the light feel and low takeup point as well. Its never given the slightest indication of wanting to slip, and never given off 'burnt clutch' odors... :)

I guess the botton line is its gonna be what your comfortable doing. I would certainly be apt to drive a new clutch hard if it is mated to a brand new flywheel since the surfaces are more likely to be flat. Unfortunatley as long as manufactures list a "break in period" were screwed if the clutch glazes over.

Dynos can be very hard on a clutch, I read several post here stating "the clutch was slipping" while doing the run, when on the street they had not. Most likely the clutch wasnt disigned for their power ouput. I went to ICS to dyno my car right before the new clutch install. George from ICS did tell me to wait till I had 1k on my NEW clutch before he recommended I dyno my car again.

Once again, 10 posts, 10 different opinions, you gotta love it!

Lets us know what you end up doing.

JMC