Ok, last 2 days noticed some strange clutch like smells when stationery, but no real big power starts.

This morning, about 5 times whilst teasing a Octavia RS, in 4th gear about 4000rpm and foot down, hit full boost (no overboost), revs rise normally, then rise rapidly and then drop back (not fuel cut) smoothly whilst my foot is still planted to the floor.

To me it seemed very much like the clutch was slipping, but I would not expect it in 4th!

I was then bracing myself for problems setting off at a set of traffic lights.

1st gear, moderate set off, ok.
2nd gear, moderate again, ok.

so next set of lights.

1st gear, hard set off 4500rpm, ok
2nd gear, foot to floor, ok
3rd gear, ditto
4th gear, foot to floor, the slip again

It then would not repeat it again when my work colleague was in the car, and i asked him to observe a few things!

Very confused as to what it could be

Steven

 

Sounds like your clutch. They will often slip in a higher gear first. Just be nice to your gearbox when the new clutch goes in.

The other option is to turn the boost down or use part throttle, which will not be popular but will keep you mobile until you can get the clutch done.

I am coming round to the idea of running this setup at 1.2 bar flat up to the top to preserve the internals, turbo, gearbox, clutch but still make decent power.

I suspect that it would be far more reliable and still quite nice to drive. After all if you don't want to worry about it and just enjoy it... If we are worried about the conrods over 300 lbft. To get this car truly reliable to normal Subaru reliability would I believe need an uprated gearbox, clutch and internals.

[Edited by john banks - 10/31/2002 9:16:32 AM]

 

I know what you are saying John, but it is peaking at about 1.35 bar and settling and holding 1.25 bar.

Just did not expect it start to go so soon.

Suppose its the 313ftlb of torque that is doing it?

Will have to drive steady, as i cant afford a new clutch and gear set, unless Mark takes credit card.

Suprised it does it in the higher gears, on 2 other cars, 106gti and civic vti, it was 2nd and 3rd that it started to slip.

Oh well, fingers crossed x

Best buy a banger just in case.

 

Deffo your clutch. Mine went and I had exactly the same symptoms.

 

 

Steven,

Are you rolling the eyes at the prospect of a new clutch or something else?

 

prospect of new clutch, and telling my wife

 

LOL I'm guessing you wont have to tell her...........doesn't she now read scoobynet?

 

My clutch did exactly the same thing

<horror story mode>
It lasted about a month after the first signs of slipping.
Then the car wouldn't go up hills
</horror story mode>

I was told that it was best get it done quickly, or risk graunching the flywheel.

Mine cost £270 inc. fitting and it's a good clutch for standard (or not too much above) power

 

given that i am running in the region of 340bhp and 315ftlb torque, i had best get a uprated one.

 

STI, i dont know wether she does, could be someone taking the plss.

 

Are you running 300+ torque through a std UK clutch? and you think it may be slipping?

Those uprated clutches Mark sells must be doing a roaring trade!

Justin

 

yes i am, not suprised its slipping, just surprised how soon

Mark aigin here i come

 

Did you do any full bore starts?

Before I fitted the bigger turbo and FMIC I tightened up my act with my cluth and gearbox usage in the hope of giving it every chance possible. How many miles does you present clutch have on it?

You know with this much torque that just one missed or over-rushed gearchange and your box could go straight away ?

I have missed one change since the big turbo went on and I thought I had done the 5th gear synchro as it wouldn't go into 5th gear until I stopped and turned the engine off and tried again. Been OK since, but I used to miss gears on the track quite often.

 

I have done 1 full baore start (5500rpm) and that was before the big turbo. Been pretty gentle with it since IMHO.

Steven

 

Doesn't the car make more boost in 4th and 5th slightly and there is less chance of wheel slip in 4th and 5th so the stress is put on the clutch as it is the weakest part of the chain...
As the clutch is only just starting to go in the lower gears the slight not noticable give in the tyres and lower boost take some pressure off the clutch.. IMHO..

109,000miles and original clutch... touches big wooden desk many times..

JGM

 

yup

 

I guess this brings us back to the question "what power level is safe before things start to break?".

I can see a new uprated clutch on the way from Mark and then Mark will no doubt be penciling in a new gearbox for you

It's a slippery slope, especially if you now have to remember to be gentle in the first 2 gears and other compromises set in...

JMHO (wishing that I had the power to be able to consider these issues).

F

 

its cos you drive like a tit...

David

Std Clutch
Std Box..
Leaking Cheap Gearbox Oil..

 

Yeah but your gear box is already half shagged

If i drive like a tit, say 32C, then, from what you say, you must drive like a 44GG

New clutch and flywheel will be on its way soon

Anyone got a paper round going?(need pennies from somewhere)

Steven

 

If your clutch is starting to slip you are always going to notice this more in 3rd or 4th gears.. that applies to any car not just Scoobs .... this is when the clutch is working hardest due to gearing/acceleration factors.

 

got the same problem myself last night, slipping at around 4000 rpm in 4th gear.

new one goes in on monday

 

to round my day off this happened on the way home



bloody pot holes![img]images/smilies/mad.gif[/img]

 

I've done around 60 - 70 full bore drag race starts on my standard clutch plus as many track day laps. It is only JUST up to the job though ! A few too many revs on take off and the rpm needle can bend itself around the stop

My fears are that fitting a heavy duty clutch will transmit more torque shock load through the drivetrain

This is displayed on my AP22 meter as spikes in G force. In a modified EVO recently with a twin plate clutch I recorded spikes of 2.5x the torque produced by the engine ie flywheel/crank inertia forces of iro 700lb-ft torque !! I think this will do more damage than a steady, say 350lb-ft.

I guess ideally we need a clutch that will 'just' hold 350 lb-ft and no more ???

 

just so happens you have 348lb-ft andy .

bet sam liked getting told he had a torque of 700lfbt for a split second,finally he beat you

 

Maybe I should have told him 'before' he broke the box.....ooops !

 

I recently went through the same - remapped fuelling/ignition, car went much better, clutch started slipping 5th gear during spool (makes for sh*te boost control!).

On replacement the original is OK (new OE one 30k km's ago - fitted free), it's just not up to the job. Mechanics reckoned deglazing *may* have helped.

I fitted a strongly sprung Sachs organic - gone are the days of dropping the clutch on launchs now, even the shocks on aggressive gear changes have increased. Makes car faster though

Don't forget to do the flywheel at the same time - I reduced the OE wheel to just under 8kg (original is 11.5 ).

As a combination, the car is much nicer to drive - I can even accelerate from 65km/h in 5th now

Richard

 

Sorry to see that wheel P20SPD!!

Hope you can get another one.

JGM

 

so do i

 

Ah bollocks mate, yesterday was a bit of a swine.

Beer at lunch?