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dmacp
Newbie


Joined: 25 Feb 2018
Posts: 7


2000 Porsche 996 Turbo

PostPosted: Fri Sep 28, 2018 1:14 pm    Post subject: Reply with quote

Maldern,

Thanks for your comments, Kits are available such as this one,

http://www.9products.com/product/4040/brake-caliper-spacer-front

which allow you to fit 350mm diamater rotors with the existing callipers and pads. There is a theoretical increase in available braking force due to the increased leverage.

What I'd like to know is, is it worth it?

I'm changing discs now anyway and it isn't much more for the 350mm dia over the 330mm, and the spacers are easy to fabricate.
 
  
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asterix_the_gaul
Suzuka


Joined: 20 Dec 2008
Posts: 1101
Location: Cheshire

1999 Porsche 996 Carrera 2

PostPosted: Sat Sep 29, 2018 6:25 am    Post subject: Reply with quote

Will you not get an unswept area of the disc face at the centre or are the 350 discs designed for the 996 pad area? If the same depth pads are used on the 997 350 discs as the 996 330 discs then it should be fine. Or maybe you are supposed to use a different pad?Yes you would notice the difference going to the bigger disc and seems a cheap and easy upgrade: I would check with the manufacturer of the spacers about any unswept area/pad size choice. Unswept areas not the end of the world but would annoy some people
_________________
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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uk996
Trainee


Joined: 09 Jan 2018
Posts: 90
Location: Home Counties


PostPosted: Wed Oct 17, 2018 10:25 pm    Post subject: Reply with quote

Thread resurrection !

Anyone get any further with creating a reliable and repeatable process (at a decent cost) for using Cayenne/Audi calipers for our 996/996tt?
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2002 996tt Aero in seal grey 6MT
 
  
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MisterCorn
Long Beach


Joined: 08 Jan 2011
Posts: 6249
Location: Nottingham, England

2004 Porsche 996 Turbo

PostPosted: Wed Oct 17, 2018 10:33 pm    Post subject: Reply with quote

I have Smile

You can see them here.

http://911uk.com/viewtopic.php?t=125503&postdays=0&postorder=asc&start=220

Also done spacers for the rear to use 350mm rear disks with 996 turbo rear calipers and the required pipe to run the 27mm master cylinder. I will do a seperate thread on it with the required sums to show how the balance is affected at some point.
Plenty of details on that thread but it is a but spread out with other stuff.

This is for a 996, not turbo,C4S or GT3/2. I would just run the front 6 piston 996.2 GT3 calipers on those. As I do on my 996 turbo.

MC
 
  
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uk996
Trainee


Joined: 09 Jan 2018
Posts: 90
Location: Home Counties


PostPosted: Wed Oct 17, 2018 11:57 pm    Post subject: Reply with quote

Where's the best place to buy them from?
OPC?
design 911 are selling them for £767 each. They've got a 10% promo on at the moment which is handy. Some of the older posts I've come across seem to indicate they were originally sold for £600 the PAIR by the OPC. Seems they've upped the markup :-(
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2002 996tt Aero in seal grey 6MT
 
  
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MisterCorn
Long Beach


Joined: 08 Jan 2011
Posts: 6249
Location: Nottingham, England

2004 Porsche 996 Turbo

PostPosted: Wed Oct 17, 2018 11:59 pm    Post subject: Reply with quote

uk996 wrote:
Where's the best place to buy them from?
OPC?
design 911 are selling them for £767 each. They've got a 10% promo on at the moment which is handy. Some of the older posts I've come across seem to indicate they were originally sold for £600 the PAIR by the OPC. Seems they've upped the markup :-(


Best place to buy what?
MC
 
  
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uk996
Trainee


Joined: 09 Jan 2018
Posts: 90
Location: Home Counties


PostPosted: Thu Oct 18, 2018 12:24 am    Post subject: Reply with quote

GT3 6 pot calipers
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2002 996tt Aero in seal grey 6MT
 
  
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MisterCorn
Long Beach


Joined: 08 Jan 2011
Posts: 6249
Location: Nottingham, England

2004 Porsche 996 Turbo

PostPosted: Thu Oct 18, 2018 7:30 am    Post subject: Reply with quote

uk996 wrote:
GT3 6 pot calipers


I would go with OPC. I have heard that prices have increased massively over the last few years though so brace yourself. With decent fluid / disks / pads and cooling ducts you have to be going pretty mad to run out of brakes. My standard brakes on the turbo were able to do 13 back-to-back emergency stops from 70mph with no increase in braking distance. When I changed to 6 piston calipers I got slight fade on the front brakes in the last couple of stops from the pads getting hot and not being as good as the pads I had on the original 4 pots. Line pressure was just as high so fluid was fine, but the rear brakes were doing more of the work from looking at relative wheel speeds and variations in line pressure from the operation of the ABS. The 6 piston ones do look the business though Smile

MC
 
  
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uk996
Trainee


Joined: 09 Jan 2018
Posts: 90
Location: Home Counties


PostPosted: Thu Oct 18, 2018 7:56 am    Post subject: Reply with quote

Perhaps I’m going about this the wrong way. I haven’t had my 996t long. The brakes OE brakes appear to be in good condition. What I’m looking for is more initial response from the brakes, to me they feel wooden and unresponsive. However they do seem to wake up once warmed up and is ok at faster speeds.

The car had been driven by 9e and another independent Porsche tech, they both said it’s normal.

To me it really doesn’t inspire confidence. With my other cars, changing the callipers and the mc if necessary always resulted in better brakes that gave better feedback and modulation, I could feel that I could consistently slow down at the rate I wanted with confidence, with the 996, I haven’t.

I’m not actually too bothered whether the brakes are 4 or 6 pot. I want them to feel more responsive. What do you think?

On a related subject, I seem to remember someone saying the 911 would benefit from improving the rear brakes more, as there is significantly more weight concentrated at the rear.
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2002 996tt Aero in seal grey 6MT
 
  
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maldren
Österreich


Joined: 07 Oct 2016
Posts: 923



PostPosted: Thu Oct 18, 2018 11:50 am    Post subject: Reply with quote

996 brakes need more pedal effort than typical modern road cars, once you get used to this they are fine.

Nobody has mentioned it but another option might be to change the feel would be to increase the servo assistance. Anyone tried it?
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Mike
2003 996.2 C2 Coupe Arctic Silver
 
  
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Stotty
Silverstone


Joined: 17 Dec 2009
Posts: 135
Location: Surrey


PostPosted: Thu Oct 18, 2018 12:17 pm    Post subject: Reply with quote

I think I read somewhere that the 997 MC is a good upgrade for brake feel on 996’s.
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2000 996, C2, manual, arctic/metropole, sunroof delete, Koni shocks, H&R -30 spring, Cup wheel, 170k miles. 2018 Touareg RLine Plus
 
  
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MisterCorn
Long Beach


Joined: 08 Jan 2011
Posts: 6249
Location: Nottingham, England

2004 Porsche 996 Turbo

PostPosted: Thu Oct 18, 2018 12:21 pm    Post subject: Reply with quote

Yes, it is mentioned in a few places.

http://911uk.com/viewtopic.php?t=129789&highlight=

MC
 
  
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Stuart Mackay
Spa-Francorchamps


Joined: 29 Apr 2013
Posts: 263
Location: Swaffham, Norfolk and Good


PostPosted: Fri Oct 26, 2018 8:00 pm    Post subject: Reply with quote

Can confirm that Martin's GT3 m/c mode is a great thing and have fitted one to the C4 today, pedal now feels nice and progressive and not as though you are stamping on a block of concrete! thumbsup
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2002 Guards Red Aerokit 996.2 C4S Cabriolet
2000 Westfield Cosworth
 
  
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