996 Turbo / GT2 Turbo discussion on previous model 2000-2005 Porsche 911 Twin Turbo and 911 GT2.

Wheel Spinning...

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Old May 24, 2004 | 03:40 PM
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Wheel Spinning...

Guys... I'm having trouble with wheel spinning around 4-5K rpm...
=_="
I'm running the 285 i got a long time ago (SO3), b/c at the time I don't have a chance to get wider tire...

now when I was racing with a friend's R6 or M3... I actually can't outrun them b/c my wheel spins all the way from 1st gear to 5th...(around 4-5K rpm)

I'm wondering... what's the widest wheels I can fit w/o doing the widebody conversion to my car????
I'm thinking about downsizing my wheels to HRE C1 18inch...
I wonder what's the widest wheel i can fit to my front and rear...

and what about if I do the widebody conversion...
what's the widest i can use?
(thinking about doing the 2inch wider each side at the rear...and 1-1.5 at front, the one meridian did to their 700hp silver turbo)

b/c I can't believe that I was paralleled to a M3 when accelerating =_="...it's a shame...
definetely a nightmare after spending all these bucks...
 
Old May 24, 2004 | 03:48 PM
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use GT2 size & roll the rear fenders.
 
Old May 24, 2004 | 08:47 PM
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"I actually can't outrun them b/c my wheel spins all the way from 1st gear to 5th...(around 4-5K rpm)"

Something is wrong with your set up if you are spinning 4th and 5th at those rpm ranges assuming you have stock gearing.
 
Old May 24, 2004 | 08:57 PM
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One thing I never understood. How do cars with 600-650hp spin the wheels all the way through 3rd, when a 500hp car doesn't break free at all unless you really try to make it with the clutch? Is there really that big of a difference??
 
Old May 24, 2004 | 09:57 PM
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Are you sure the clutch is not slipping?? Because I too find it hard to believe that with traction control and AWD you are spinning your tires that much.
 
Old May 24, 2004 | 10:05 PM
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There is flat no way that your wheels are spinning (I'm assuming you don't have a GT2):

1. If they were, PSM would stop it

2. You don't have enough horsepower to spin AWD.

As someone else stated; you need to look at your clutch.

When you think your wheels are spinning... is it because you hear the tires breaking loose and you have PSM off or is it because the tach indicates hi RPM but you aren't moving as fast as you think you should be?

Joe West
 
Old May 24, 2004 | 11:54 PM
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Re: Wheel Spinning...

Originally posted by luting_chen
... now when I was racing with a friend's R6 or M3... I actually can't outrun them b/c my wheel spins all the way from 1st gear to 5th...(around 4-5K rpm)
Are you sure it's your tires that are spinning and not clutch? I assume your PSM is off, and thus not the culprit.

I simply can't imagine that even with 285 tires, you'd be spinning 3rd, 4th, and 5th. My 700HP Supra will spin slightly in 3rd if the roads are not perfect, otherwise, it'll hook up from 3rd ~ 6th. The Turbo has far more weight over the rear tires than Supras. Also, if you can, have your car checked on a dyno. Maybe somehow, it's losing power as opposed to losing traction. Good Luck, keep us posted.
 
Old May 25, 2004 | 12:01 AM
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yup have the same problem too, when i try to do a hard launch with my 996 the clutch would slip, i would agree withe th other gys just seems liek your clutch is slipping.. go hop on by lucnet and have tom check it out, before you spend more $$$ on the ride
 
Old May 25, 2004 | 02:50 PM
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hm...@_@
i guess i was wrong with tire...it's probably really the clutch you guys are talking about...
b/c i know that around 4-5k rpm... the rpm stays at 4 to 5k for about 2 seconds... and the car is actually not really accelerating at all...
it happens when i shift from 5 to 4...or 4 to 3...and when i reach around 4.5-5 the rpm stayed...and after a few seconds then it start moving again and pull hard...
when i shifted down...and when it start to accelerate at 3krpm...it was still fine...but once it reach around 4-5 it's not pulling anymore...as i stated above...


sorry if i have got the thing wrong...b/c i didn't really know that clutch would slip

how can i fix this problem???????
 
Old May 25, 2004 | 02:54 PM
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does this mean that i have to get a new clutch @_@
please tell me no...~><~
that might mean another 5G is gonna go away...

and this damn clutch is new and so is the flywheel...~><~
installed less than 3 month....
and i didn't really had a chance to drive it as well...
 

Last edited by luting_chen; May 25, 2004 at 03:30 PM.
Old May 26, 2004 | 04:54 AM
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yes you need a new clutch, you should look into an upgrade as well.

you are putting too much power for your stock cluch.. a clutch should last a lot longer thatn 3 months.
 
Old May 26, 2004 | 05:15 AM
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can you smell the clutch burning. don't see how you would not notice. should have a very strong smell like plastic burning. one other possibility is that who ever put your tires on broke the beads and the tire is spinning on the rim, but very unlikely. nevertheless to go through a clutch in 3 months means the replacement clutch was not fully replaced (flywheel just shaved) or your definitely feathering your clutch way too much on the launch or down shift.
 

Last edited by Don Relentless; May 26, 2004 at 05:38 AM.
Old May 26, 2004 | 01:41 PM
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^^it's not stock clutch...
i have stage 2 sachs clutch...hahaha
i guess it's my brother =_=" he drives it hard while i babysit my car... damn it...

well...i ordered the evo stage 3 clutch today~~~^____^
 
Old May 26, 2004 | 02:55 PM
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Originally posted by luting_chen
^^it's not stock clutch...
i have stage 2 sachs clutch...hahaha
i guess it's my brother =_=" he drives it hard while i babysit my car... damn it...

well...i ordered the evo stage 3 clutch today~~~^____^
Do you still have your stock clutch? If so may as well burn that out before spending more $$. The stock clutch is pretty darn strong, may be able to handle it.
 
Old May 26, 2004 | 03:56 PM
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Originally posted by luting_chen
hm...@_@
i guess i was wrong with tire...it's probably really the clutch you guys are talking about...
b/c i know that around 4-5k rpm... the rpm stays at 4 to 5k for about 2 seconds... and the car is actually not really accelerating at all...
it happens when i shift from 5 to 4...or 4 to 3...and when i reach around 4.5-5 the rpm stayed...and after a few seconds then it start moving again and pull hard...
when i shifted down...and when it start to accelerate at 3krpm...it was still fine...but once it reach around 4-5 it's not pulling anymore...as i stated above...


sorry if i have got the thing wrong...b/c i didn't really know that clutch would slip

how can i fix this problem???????
IF in fact your observations are accurate, and your tach "stays at 4 to 5k for about 2 seconds", then your clutch is not the problem. If you clutch was in fact slipping, than your tach and engine RPM would increase much faster than your speed increase would be. Your tach may even bounce off the rev-limiter.

For example, let's say you're in 6th, and you downshift to 4th into the meat of the torque curve, and go WOT, with a slippin clutch, your speed would increase momentarily, followed by your tach and RPMs shooting towards the redline without any noticeable change in acceleration. That's what a slipping clutch feels like (or a botched launch where you overslip the clutch). Go and have somebody drive or ride with you who knows about cars, and they easily be able to tell you whether it's the clutch or something else. Good Luck.
 


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