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sim996
Monza


Joined: 05 Aug 2017
Posts: 185



PostPosted: Sat Dec 08, 2018 5:23 pm    Post subject: Reply with quote

PM'd Alex

I've got these control items, 5% off for two. £33 total. Borg&Beck have a decent reputation for oem parts on other forums I post on. Delphi are only £18, they're decent too.

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F332571282321
 
  
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Marky911
Indianapolis


Joined: 04 Jun 2009
Posts: 2348



PostPosted: Sun Dec 09, 2018 1:07 am    Post subject: Reply with quote

Good spot Sim.

I've just bought a pair. £30.62. I'll probably gather the rest of the kit after Xmas now.

Thanks. Thumb
 
  
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911munKy
Montreal


Joined: 26 Nov 2014
Posts: 520



PostPosted: Sun Dec 09, 2018 10:22 pm    Post subject: Reply with quote

Just got home tonight to find my Hardrace adjustable arms waiting for me, they look like a thing of beauty and appear to be really well made, very sturdy.

I’m going to find a flat piece of tarmac tomorrow and measure ride heights to see if that is contributing to the problem as the arch gap seems less in the rear so it may be sitting lower than X74 spec. I may require spacers if that’s the case, there is not much weight at the front of my C2 without the spare wheel/tools so that may also be slightly high and I need to set the correct F/R attitude.

If all is ok though I’ll hopefully fit the arms and get a geo done soon at a more experienced place than Kwikfit. (Asterisk - I’ll give La Rose a call, thanks, I forgot about them).
Only fly in the ointment could be that our extension starts tomorrow and the pile drivers will take up the front of the house so I’ll need to find a quiet area to carry out the work workload permitting.

I’ll report back when I know more.
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2000 C2 996
 
  
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infrasilver
Fast & Furious
Fast & Furious


Joined: 04 Oct 2010
Posts: 8210
Location: East Midlands

2001 Porsche 996 Targa

PostPosted: Sun Dec 09, 2018 10:34 pm    Post subject: Reply with quote

I think the mystery is that the X74 spec is different to lowering by -30mm, I don't think X74 does actually go the full 30mm? Mine is definitely lower than a GT3 and RS versions, 996 and 997, confirmed on various road trips, and they are supposed to be -30mm from a standard Carrera, mine is a few mm lower than those, hence the need to have cup car style rear toe arms.
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Dammit
Watkins Glen


Joined: 23 Sep 2016
Posts: 2152



PostPosted: Sun Dec 09, 2018 11:00 pm    Post subject: Reply with quote

Not exactly the most accurate check in the entire world, but I measured ground to base of wheel-arch for someone on here just after I had my new suspension fitted and they responded that it was -30mm from where their car sat (which was standard).
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infrasilver
Fast & Furious
Fast & Furious


Joined: 04 Oct 2010
Posts: 8210
Location: East Midlands

2001 Porsche 996 Targa

PostPosted: Sun Dec 09, 2018 11:06 pm    Post subject: Reply with quote

Not accurate but consistently correct.
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911munKy
Montreal


Joined: 26 Nov 2014
Posts: 520



PostPosted: Mon Dec 10, 2018 1:40 pm    Post subject: Reply with quote

I think you are correct Infrasilver, I’ve just measured my cars ride height with the lowered Eibach springs (full tank of fuel although the spare wheel and tool kit were not installed so the front reading should probably be a further 1 or 2 mm lower) and it is lower than X74 and even lower than standard GT3 at the rear.

My following readings were taken on level tarmac which obviously isn’t billiard table smooth so could easily be 1 or 2 mm out eaither way and also the RR wheel has 0.85’ more Camber than the RL and the front cambers are also slightly mismatched due to Kwikfit alignment woes.

Average F/R heights:

M030 134/144mm (my C2 height before Eibach springs fitted)
X74 118/133mm
GT3 112/125mm base setting (F -10mm/ R +10mm adjustments)
*Eibach 112/119mm*

I think these lower ride heights explain partly why my car was difficult to get to correct toe/camber settings and now requires adjustable arms. I’d like to increase the F/R attitude so I’m going to have a look at spacers as it sits too low at the rear for me with the front as it is. I’d like to return to more rake with +15mm extra at the rear.

The car doesn’t ground out on speed bumps though, I had previously rolled all the arches and had fitted 15mm wheel spacers all round so I’m not getting any wheel to body interference with just me driving.
As a point of note the car feel less hard at low speeds over bumps which I put down to the Eibach progressive springs rather than linearly wound M030 springs.
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NedHan79
Nürburgring


Joined: 08 Nov 2018
Posts: 453



PostPosted: Mon Dec 10, 2018 11:20 pm    Post subject: Reply with quote

911munky which wheels are you on? I’m looking at -30mm springs and 15mm rear spacers and 7mm front but would chance 15mm on the front if I thought I’d get away with it. I have the gt3 style split rims. Not sure on the name
 
  
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911munKy
Montreal


Joined: 26 Nov 2014
Posts: 520



PostPosted: Tue Dec 11, 2018 4:27 am    Post subject: Reply with quote

I have 8J ET50 ‘Sport design’ 18” wheels, with 15mm spacers on all 4 corners and Eibach -30mm springs. My rear wheels are currently below GT3 height with rolled arches (maybe not necessary) and the fronts are at GT3 height without interference issues riding solo.
I’m going to raise the rear a few mm but the fronts with 225/40R18 are in no danger of making contact with th bodywork, I’ve even considered to go wider than +15mm spacers to match the rear, I think +7mm would seem a bit inset.
I’d recommend at least +15mm spacers to you (although every car is different I can’t see a problem).

Edited to add that my current 295/30 Continental tyres were wider than the Falken tyres fitted when I purchased the car and without camber adjustment the rears occasionally made arch contact as the original geo was out. When set to standard geo there was no issue. Go for it.
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Last edited by 911munKy on Tue Dec 11, 2018 8:49 am; edited 1 time in total
 
  
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NedHan79
Nürburgring


Joined: 08 Nov 2018
Posts: 453



PostPosted: Tue Dec 11, 2018 6:29 am    Post subject: Reply with quote

Sport designs are what I have, aren’t they the gt3 wheel? Not sure on offset but iirc my fronts are 235/40 and my tears are 285/30. All Pirelli p-zeros. Possibly 225 front but I’m nearly sure 235. The rears are right though. I don’t want to be going into rolled arches or have problems with passengers. Chances are it’ll only ever be my kids which are young so no real weight. I’ll just gather the bits over the next while before I fit any of it.
 
  
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asterix_the_gaul
Barcelona


Joined: 20 Dec 2008
Posts: 1262
Location: Cheshire

1999 Porsche 996 Carrera 2

PostPosted: Tue Dec 18, 2018 8:50 pm    Post subject: Reply with quote

OK, I would just like to apply for some humble pie..

Had my Koni special active shocks, Eibach prokit -30mm springs, new coffin arms and tuning forks, top mounts and bump stops fitted at unit11 porsche then over to ninemeister for a geo. -2.2 at the rear both sides. Advised that was what was possible with the setup provided, So I guess I too need adjustable arms to dial out the big negative rear camber or fit some taller springs to increase the ride height, or live with it I guess
Damn as they just had to put new rear control arms on as they were seized. I'm going to have to check the ride height and make a decision
_________________
1992 944 S2 Cabriolet, Cobalt Blue/Classic grey -gone!
1995 993 C2 Cabriolet, Midnight Blue/Marble grey -gone!
1999 996 C2 Coupe, Ocean Blue/Graphite grey
2002 E46 M3 Cabriolet, Laguna seca blue/LSB
 
  
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NedHan79
Nürburgring


Joined: 08 Nov 2018
Posts: 453



PostPosted: Tue Dec 18, 2018 9:03 pm    Post subject: Reply with quote

I’m guessing that negative camber will eat the tyres?
 
  
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asterix_the_gaul
Barcelona


Joined: 20 Dec 2008
Posts: 1262
Location: Cheshire

1999 Porsche 996 Carrera 2

PostPosted: Tue Dec 18, 2018 9:11 pm    Post subject: Reply with quote

Yes, I don't know how long it will probably take a little while, but tyres are not cheap so probably better to spend the money on correcting the excessive rear camber than buying new tyres every few thousand miles

Is that kind of negative camber a real tyre eater or are we getting worried over nothing? Question
_________________
1992 944 S2 Cabriolet, Cobalt Blue/Classic grey -gone!
1995 993 C2 Cabriolet, Midnight Blue/Marble grey -gone!
1999 996 C2 Coupe, Ocean Blue/Graphite grey
2002 E46 M3 Cabriolet, Laguna seca blue/LSB
 
  
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infrasilver
Fast & Furious
Fast & Furious


Joined: 04 Oct 2010
Posts: 8210
Location: East Midlands

2001 Porsche 996 Targa

PostPosted: Tue Dec 18, 2018 9:21 pm    Post subject: Reply with quote

NedHan79 wrote:
I’m guessing that negative camber will eat the tyres?



YES they do, 2mm on the inside and can be as much as 5mm on the outside when it comes to changing them.
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NedHan79
Nürburgring


Joined: 08 Nov 2018
Posts: 453



PostPosted: Tue Dec 18, 2018 9:27 pm    Post subject: Reply with quote

Are there any issues with the front on a 30mm drop?
 
  
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infrasilver
Fast & Furious
Fast & Furious


Joined: 04 Oct 2010
Posts: 8210
Location: East Midlands

2001 Porsche 996 Targa

PostPosted: Tue Dec 18, 2018 9:41 pm    Post subject: Reply with quote

NedHan79 wrote:
Are there any issues with the front on a 30mm drop?


Everything suspension wise can be standard and the front tyres don't get worn as quickly as the rears.
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Dammit
Watkins Glen


Joined: 23 Sep 2016
Posts: 2152



PostPosted: Tue Dec 18, 2018 10:14 pm    Post subject: Reply with quote

asterix_the_gaul wrote:
OK, I would just like to apply for some humble pie..

Had my Koni special active shocks, Eibach prokit -30mm springs, new coffin arms and tuning forks, top mounts and bump stops fitted at unit11 porsche then over to ninemeister for a geo. -2.2 at the rear both sides. Advised that was what was possible with the setup provided, So I guess I too need adjustable arms to dial out the big negative rear camber or fit some taller springs to increase the ride height, or live with it I guess
Damn as they just had to put new rear control arms on as they were seized. I'm going to have to check the ride height and make a decision


I'm at a loss with regards to my car then.
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asterix_the_gaul
Barcelona


Joined: 20 Dec 2008
Posts: 1262
Location: Cheshire

1999 Porsche 996 Carrera 2

PostPosted: Tue Dec 18, 2018 10:22 pm    Post subject: Reply with quote

Quote:

I'm at a loss with regards to my car then.


You had the same spec but got inside x74 geo dammit?
_________________
1992 944 S2 Cabriolet, Cobalt Blue/Classic grey -gone!
1995 993 C2 Cabriolet, Midnight Blue/Marble grey -gone!
1999 996 C2 Coupe, Ocean Blue/Graphite grey
2002 E46 M3 Cabriolet, Laguna seca blue/LSB
 
  
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Dammit
Watkins Glen


Joined: 23 Sep 2016
Posts: 2152



PostPosted: Tue Dec 18, 2018 10:54 pm    Post subject: Reply with quote

Everything on mine is OEM Porsche or Ohlins, and I’m at X74 ride height (18” Carrera 5 spokes if that makes a difference) and have the geometry I posted earlier in this thread.
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asterix_the_gaul
Barcelona


Joined: 20 Dec 2008
Posts: 1262
Location: Cheshire

1999 Porsche 996 Carrera 2

PostPosted: Tue Dec 18, 2018 11:05 pm    Post subject: Reply with quote

oh, well that makes me feel better, I believe from the posts above the Eibach springs give you a lower ride height than X74 and slightly lower than gt3 hence the problem comes down to too low so therefore needing the adjustable arms to correct the camber or taller springs/adjustable coilovers to correct ride height so the camber sorts itself out. Or sod it and live with it.
_________________
1992 944 S2 Cabriolet, Cobalt Blue/Classic grey -gone!
1995 993 C2 Cabriolet, Midnight Blue/Marble grey -gone!
1999 996 C2 Coupe, Ocean Blue/Graphite grey
2002 E46 M3 Cabriolet, Laguna seca blue/LSB
 
  
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