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Carrera vs. Carrera S brakes

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Old 10-15-2015, 01:37 PM
  #16  
Larry Cable
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Originally Posted by 997s07
What happens to 4 piston calipers versus 6 piston calipers in the long term?
IMO its mostly an issue if you track your car (a lot).

The original GT3 had the 996TT 360mm 4-piston calipers, they were awesome
on the street, but a few aggressive laps on track and they were done; even
running more aggressive pads and higher temp brake fluid did not abrogate
the problem.

The car simply did not have enough rotor surface/mass to deal with the thermal
issues on track... this was cured in the 996.2 car which had the 380mm 6-piston
system installed.

based on my experiences on track in this car, and others, I would not use a
4-pot system extensively on track ... on street it should not matter, its a
simple case of cosmetics.
Old 10-15-2015, 02:47 PM
  #17  
997s07
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Originally Posted by Larry Cable
IMO its mostly an issue if you track your car (a lot).

The original GT3 had the 996TT 360mm 4-piston calipers, they were awesome
on the street, but a few aggressive laps on track and they were done; even
running more aggressive pads and higher temp brake fluid did not abrogate
the problem.

The car simply did not have enough rotor surface/mass to deal with the thermal
issues on track... this was cured in the 996.2 car which had the 380mm 6-piston
system installed.

based on my experiences on track in this car, and others, I would not use a
4-pot system extensively on track ... on street it should not matter, its a
simple case of cosmetics.
Makes sense. Thank you.
Old 02-05-2016, 12:33 PM
  #18  
77tony
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Check in with Squires, he installed Turbo steels on his C4S and said they are direct bolt on. More here: http://www.6speedonline.com/forums/9...ml#post4222856 T
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Last edited by 77tony; 02-05-2016 at 01:01 PM.
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Old 02-05-2016, 06:11 PM
  #19  
satoru
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Originally Posted by 77tony
Check in with Squires, he installed Turbo steels on his C4S and said they are direct bolt on. More here: http://www.6speedonline.com/forums/9...ml#post4222856 T
Amazing car

Talked to someone at dealer and they asked a tech and his response was...big job, need to change spindles etc. Not was what I was hoping for.

Going from Turbo to C4S compared to S to Base might be a little more of a difference prolly. Gotta dig a little deeper into this mystery

buuhhhuuwwaaaa
Old 02-05-2016, 06:14 PM
  #20  
Larry Cable
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Originally Posted by satoru
Amazing car

Talked to someone at dealer and they asked a tech and his response was...big job, need to change spindles etc. Not was what I was hoping for.

Going from Turbo to C4S compared to S to Base might be a little more of a difference prolly. Gotta dig a little deeper into this mystery

buuhhhuuwwaaaa
my guess the C4S and the TT share the same wheel carrier/uprights, and I'll bet the base and S do not ... if you get the PET for the 991S and base you can compare the part #'s for the wheel assy to determine the work
Old 02-06-2016, 12:44 AM
  #21  
satoru
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Originally Posted by Larry Cable
+1
Originally Posted by 008
Depending on your needs you're likely better off just buying a brembo BBK kit but you should just need rotors and calipers. Check the assist pump and master cylinder part numbers between the S and base jic.
Ok...for the rear--hub, axle, knuckle, brake shoes (parking), master cylinder, tank, booster, ABS pump/sensor, brake module...all same P/N's for Base vs. S. Seems like everything but the rotors, calipers and pads.

Here's the kicker...reliable source tells me that the S rear has more pad area hence the different part numbers. Being both are at 330mm from hub to rotor edge might be the S rotor would have a bit more area. SO, I'm thinking for a Base rear to be upgraded to S rear just the rotors, calipers and pads needed to be doable So if that's the case, $1600 from one dealer for S to Base swap might be less at different dealer tho. For the fronts @ $1995 + $1600 = $3595

Like the OEM would be 1/2 the price of a real aftermarket big brake kit...you decide

But...is there anyone out there that has done a 991 REAR Base to S as of yet? imho the only real way to see is if someone has done it OR for someone who has access to parts to have a side by side comparison.

Sorry so long, did not want to paint my calipers...lol
Old 02-08-2016, 11:31 AM
  #22  
technivoro.us
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Is the heat capacity problem in the calipers, or the rotors?

Girodisc sells a kit that puts 350mm two-piece rotors on all four corners for $2400 (with spacers to move the 3.4 calipers). Thoughts?
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Old 02-08-2016, 12:47 PM
  #23  
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Originally Posted by technivoro.us
Is the heat capacity problem in the calipers, or the rotors?

Girodisc sells a kit that puts 350mm two-piece rotors on all four corners for $2400 (with spacers to move the 3.4 calipers). Thoughts?
That's in line with the Racing Brakes kit ($2800) which gives you their pads and 380 discs all around, and relo brackets for OEM calipers. But I don't think they allow a Base-to-GT3 conversion, only S-to-GT3.
Old 02-08-2016, 03:57 PM
  #24  
satoru
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Originally Posted by technivoro.us
Is the heat capacity problem in the calipers, or the rotors?

Girodisc sells a kit that puts 350mm two-piece rotors on all four corners for $2400 (with spacers to move the 3.4 calipers). Thoughts?
Looking at these for front, seems like a bolt-on option:
http://www.suncoastparts.com/product/PK981SBRA.html

Looks like only disc for S and 4S only, no luck on Base 3.4L:
http://www.girodisc.com/Rotors_c_1119.html
Old 09-29-2020, 02:50 PM
  #25  
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That 911 looks awesome!!!!
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Old 09-29-2020, 03:41 PM
  #26  
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On the 991.2's it's a direct swap. I put GTS brakes on my base. It was time for rotors and pads on all 4 corners and I found a used set off a .2 GTS with 2,000 miles. The rears are the same BTW.
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Old 09-29-2020, 04:30 PM
  #27  
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Originally Posted by Truble10
On the 991.2's it's a direct swap. I put GTS brakes on my base. It was time for rotors and pads on all 4 corners and I found a used set off a .2 GTS with 2,000 miles. The rears are the same BTW.
GTS brakes are the same of S brakes... Great swap BTW.
Old 11-16-2020, 03:29 PM
  #28  
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Originally Posted by Truble10
On the 991.2's it's a direct swap. I put GTS brakes on my base. It was time for rotors and pads on all 4 corners and I found a used set off a .2 GTS with 2,000 miles. The rears are the same BTW.
I have a chance to buy calipers from the S (fronts) for my base car. I don’t really want to buy the discs because the shipping is crazy expensive. Is the calipers alone a good upgrade and will it work with my current base front discs?
Old 11-16-2020, 04:34 PM
  #29  
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Originally Posted by Irish996
I have a chance to buy calipers from the S (fronts) for my base car. I don’t really want to buy the discs because the shipping is crazy expensive. Is the calipers alone a good upgrade and will it work with my current base front discs?
You will need to upgrade the rotors as well. I was able to get a full set front and rear, pads and rotors at a time when I needed to do a full replacement so I could justify. Girodisc sells a kit but you are back to getting rotors and having them shipped.
Old 11-16-2020, 07:01 PM
  #30  
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Originally Posted by Truble10
You will need to upgrade the rotors as well. I was able to get a full set front and rear, pads and rotors at a time when I needed to do a full replacement so I could justify. Girodisc sells a kit but you are back to getting rotors and having them shipped.
I’m in need of discs also as per my Indy....they were resurfaced about 12,000kms ago. So what about this as a plan....upgraded S calipers bought used and shipped.....new S discs from local Porsche parts and I think I saw somewhere someone using a factory pad from the GT3....

Do you find a noticeable increase in braking power on yours now after you’ve had them a while compared to stock?


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