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9MLS
Imola


Joined: 22 Jan 2014
Posts: 779



PostPosted: Mon Jan 05, 2015 8:28 am    Post subject: Reply with quote

Pretty much, anything is only as strong as its shortest side so M14 studs only need 14mm of nut on them to be as strong
 
  
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basildon993
Montreal


Joined: 11 Dec 2008
Posts: 624
Location: Sussex


PostPosted: Mon Jan 05, 2015 5:28 pm    Post subject: Reply with quote

Been thinking about this nut / thread depth issue, the rear 15mm spacers come with half depth nuts to fix them to the hubs and there doesn't appear to be a problem with those coming adrift. Nor does anyone seem to worry about it!

I've decided to go with 5mm spacers for the front though and I'll update with some pictures when they are fitted.

Thanks for all the input! Very Happy
 
  
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graemeho
Nürburgring


Joined: 16 Jan 2012
Posts: 392
Location: Lincolnshire


PostPosted: Mon Jan 05, 2015 8:43 pm    Post subject: Reply with quote

Wow the nuts must be thin. Interested in the photos when they are fitted Question
 
  
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9MLS
Imola


Joined: 22 Jan 2014
Posts: 779



PostPosted: Tue Jan 06, 2015 8:20 am    Post subject: Reply with quote

 
  
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Citori
Kyalami


Joined: 09 Oct 2010
Posts: 1815
Location: Rural Essex..

1996 Porsche 993 Carrera 2

PostPosted: Tue Jan 06, 2015 2:44 pm    Post subject: Reply with quote

graemeho wrote:

It's just the open ended nuts that scream 'I'm too short'. Sticking with standard nuts means that you can't see they are short. Think the spacers need to come off until longer studs are sourced and fitted.

Anyone changed them? looks like a careful bit of encouragement with a hammer to knock them out is all that's needed Question


Yes. Has anybody actually put longer wheel studs on the front (or rear for that matter) wheel hubs?

I have done this plenty of times on other cars, mini's being one, to get the wheels to fill the Wood and Pickett arches. They usually just tap out.

But on a 993 do you have to remove the brake disk and caliper to get to the stud out of the back of the hub? I have a feeling you do. Longer wheel studs are available so I would prefer to do it that way if possible even though it's more grief.
_________________
Previously enjoyed Porsche:
1996 C2 Coupe.
1983 911 Carrera Targa Sport.
1981 911SC Sport.
1978 911SC.
1970 911E.

I have CDO. It’s like OCD, but the letters are in alphabetical order, LIKE THEY ARE SUPPOSED TO BE..

Aircooled or nothin....
 
  
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BenC
Montreal


Joined: 01 Oct 2014
Posts: 604
Location: Bucks


PostPosted: Tue Jan 06, 2015 3:14 pm    Post subject: Reply with quote

I put longer studs in the hubs on my '79 SC track car - take out the spring that holds the handbrake shoes and this gives enough wiggle room to knock the original studs out and the new longer ones in - then I used some washers/spacers, an open faced steel wheel nut and an impact driver to wind in the new studs.
not sure if it's the same on a 993 as I've only owned it for a few days!

anyone got before and after pics of spacers fitted?
_________________
1997 Ocean Blue metallic manual Targa
 
  
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9MLS
Imola


Joined: 22 Jan 2014
Posts: 779



PostPosted: Tue Jan 06, 2015 4:14 pm    Post subject: Reply with quote

After with 7mm and 15mm on;

 
  
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BenC
Montreal


Joined: 01 Oct 2014
Posts: 604
Location: Bucks


PostPosted: Tue Jan 06, 2015 4:23 pm    Post subject: Reply with quote

is that with standard suspension set up and tyres etc?
presume it might be slightly different with the targa 17" wheels?
_________________
1997 Ocean Blue metallic manual Targa
 
  
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basildon993
Montreal


Joined: 11 Dec 2008
Posts: 624
Location: Sussex


PostPosted: Tue Jan 06, 2015 9:38 pm    Post subject: Reply with quote

With regard to wheel studs, 45mm length are standard I believe. The following are also available:

52mm which is +7mm (presumably for the front?)
66mm which is +21mm
72mm which is +27mm

I think the fronts can be changed in situ once the brake caliber and disc are removed, knock the old stud out and then push the new one in from the rear of the hub and pull through using a spacer and an open nut. Haven't done the job on a 993 though!
 
  
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Citori
Kyalami


Joined: 09 Oct 2010
Posts: 1815
Location: Rural Essex..

1996 Porsche 993 Carrera 2

PostPosted: Tue Jan 06, 2015 10:57 pm    Post subject: Reply with quote

According to the PET the front wheel studs are:

Up to 95 part number 90434167100 45mm

95 on part number 92834167102 52mm

I matched the part numbers with the stud lengths on the type911 site.

Why there should be two different lengths for the fronts I have no idea. Maybe that why people have different ideas about what size spacer is suitable for the studs.

As mine is a 96 car I guess I would have to go up to part number 91133167100 which are 66mm.

I have open ended steel nuts on my car and with no spacers the wheel studs are only just over flush with the nuts.
_________________
Previously enjoyed Porsche:
1996 C2 Coupe.
1983 911 Carrera Targa Sport.
1981 911SC Sport.
1978 911SC.
1970 911E.

I have CDO. It’s like OCD, but the letters are in alphabetical order, LIKE THEY ARE SUPPOSED TO BE..

Aircooled or nothin....
 
  
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graemeho
Nürburgring


Joined: 16 Jan 2012
Posts: 392
Location: Lincolnshire


PostPosted: Sun May 10, 2015 9:02 pm    Post subject: Reply with quote

graemeho wrote:
Fair enough. Thanks for the feedback. Will give it some thought Question


after much debating over the length of the studs, bit the bullet today and finally fitted the 5mm front spacers....

much improved overall look Thumb
not noticed any difference to how it drives though. Question
 



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wozy
Imola


Joined: 06 Feb 2013
Posts: 786
Location: Worcestershire


PostPosted: Mon May 11, 2015 10:15 pm    Post subject: Reply with quote

graemeho wrote:
graemeho wrote:
Fair enough. Thanks for the feedback. Will give it some thought Question


after much debating over the length of the studs, bit the bullet today and finally fitted the 5mm front spacers....

much improved overall look Thumb
not noticed any difference to how it drives though. Question



Amazing the difference isn't it. You'd never think thin spacers at only 5MM width could make such a difference until you install them. 6Kon mine now and no problems .....Touches wood.

Well done Smile
_________________
Porsche Cars of Great Britain launched the 993 in the UK in early December 1993 registering 12 x UK cars on the 6th & 7th of that month; mine is one of them.

993 C2. MBM. C4 mounts, RSRs, RS Short shifter. RS steering wheel. FSDs & M033s
Previous 2.7S, 3.2, 964 and 968CS
 
  
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Tobesetc
Barcelona


Joined: 02 Jun 2014
Posts: 1264
Location: West London, UK


PostPosted: Mon Aug 21, 2017 9:13 am    Post subject: Reply with quote

Figured I'd resurrect an old thread to keep it all in one place...

At Fairmile last week, our resident automotive fashion expert (that's Highway) suggested that I should get wheel spacers. I'm wondering what size would be appropriate for a NB with 18" hollow spoke wheels? If spacers can convince me that I don't need new wheels they could be a bargain...

Concensus above for 17" Cups is 5mm at front but not sure that applies equally to 18"? And the rear?
_________________
993 C4, Coupe '94 manual
Previous - '03 986 Boxster S
 
  
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