Notices
996 Forum
Sponsored by:
Sponsored by: LN Engineering

GT3 or Other 6 Pot Calipers on a C2

 
Old 05-14-2019, 07:03 PM
  #16  
Capt. Obvious
User
 
Capt. Obvious's Avatar
 
Join Date: Dec 2011
Location: Renton, WA
Posts: 1,438
Default

Originally Posted by Quaz View Post
Yeah the Cayanne kit isn't overly desirable for a couple of reasons. First the calipers are very heavy, so you put quite a bit of unsprung weight on the front. They are meant for a truck.
FWIW, the 18z Cayenne caliper weighs 14.35 pounds. Not sure how that compares to stock calipers or the Macan calipers.
Capt. Obvious is offline  
Old 05-14-2019, 07:39 PM
  #17  
cds72911
Addict
Rennlist Member
 
cds72911's Avatar
 
Join Date: Jun 2001
Location: Charlotte, VT USA
Posts: 1,581
Default

I can't verify the exact weight, but I can tell you those Cayenne calipers are massive and heavier than hell. At one point I had a set that I was going to install on an Audi S4, it was one of the trick upgrades that people were doing.

Last edited by cds72911; 05-14-2019 at 08:22 PM.
cds72911 is online now  
Old 05-14-2019, 07:50 PM
  #18  
dan_189
Addict
Rennlist Member
 
Join Date: Nov 2014
Location: Melbourne, Australia
Posts: 2,579
Default

What size are the rear brakes C2 vs GT3?
dan_189 is offline  
Old 05-15-2019, 10:19 AM
  #19  
Evil Bunny
User
Thread Starter
 
Join Date: Aug 2015
Location: UK
Posts: 139
Default

Standard C2 discs are 317mm Front, 298mm rear.

I currently run Giro which are 340mm front, 325mm Rear.

996.1 GT3 runs 330mm Front & Rear.

I agree with Quaz in that I feel 350mm is the sweet spot, based on performance and adding unsprung weight. - As already pointed out the weight of the Cayenne caliper is what has pushed me away from this solution.

Caliper choice also has to have a good selection of quality pads available, no point fitting a large caliper only to find there are no pads available, I currently run Pagid RS29.

Quadcammer, for fast road use the standard setup is more than adequate, add high temp fluid, good pads and 997 GT3 ducts and you have a solid setup, indeed on track, with Yoko AD08R or Michelin Cup2 I can bring the ABS in, so there is definitely enough power in the standard calipers, however it the heat management after prolonged use I am looking to improve. - And although a secondary point, I dig the look of the 6 pots.

You will need a larger 27mm 997 GT3 master cylinder one to give better pedal feel and be able push the extra fluid required by the larger front brakes.

Quaz, are you able to get the 996 GT3 6 pots to work with a bracket or do you feel the Macan calipers are a better way to go? - And which Macan 6 pots are you thinking of? Are they all the same?

My concern with the 996 GT3 is that the mount hole centres are circa 145mm, so only maginally bigger than the C2 130mm which may make fashioning an adapter difficult.
Evil Bunny is online now  
Old 05-15-2019, 11:58 AM
  #20  
The Radium King
Addict
Rennlist Member
 
Join Date: May 2010
Posts: 187
Default

going superfast has a 997 turbo kit on the same page previously linked. still big $. if you are looking for cooling, that's the rotors not the calipers. you can get larger rotors and keep the same calipers with spacers and longer caliper bolts (or go to studs). adds more clamping via the longer lever arm on the rotor as well. girodisc does it and gets you lighter rotors as a bonus, or i am pretty certain some research will find you oem rotors that are larger diameter but same width/offset and you just need to fabricate the spacers.

but really, no need to justify; if you want 6-pot then good luck, but not sure you will find a solution - "strong, light or cheap, pick two."
The Radium King is offline  
Old 05-15-2019, 12:15 PM
  #21  
Evil Bunny
User
Thread Starter
 
Join Date: Aug 2015
Location: UK
Posts: 139
Default

I already run Giro Discs, front and rear, in addition to 997 GT3 front lower ducts & front upper ducts with modified rad cowls to allow the air to run through the rads and into the wheel well, as well as custom brake ducting from the front bumper to the front calipers. - Rear runs 997 GT3 ducts.
Evil Bunny is online now  
Old 05-15-2019, 12:16 PM
  #22  
Quaz
User
 
Quaz's Avatar
 
Join Date: Jun 2002
Location: Milwaukee, WI
Posts: 125
Default

Good old RockAuto always has specs of calipers and rotors posted, gotta love it. Anyway, the Macan GTS and Turbo calipers seem to be the same, but depending on year they spec 350-370mm rotors. ????? So I will have to dig into that a bit more. The bolt hole spacing is 205mm compared to the 145mm of the GT3 caliper and the 130mm for the standard Carrera. This is significant because there should be enough room to actually make the adapter and not modify the caliper as they do to fit the turbo/GT3/Cayanne units. I have seen the GT3 kit and it is pretty hokey in my opinion. Then comes the pistons, they are 36/36/36 compared to 44/36. This is where I need to crunch some numbers and see how much that will screw up the bias and pedal travel. Pretty sure the Macan caliper is the way to go here though. I am on the road for the next couple of days so I can research more when I get back home.
Quaz is offline  
Old 05-15-2019, 12:27 PM
  #23  
Flatlined
Addict
Rennlist Member
 
Flatlined's Avatar
 
Join Date: Dec 2018
Posts: 194
Default

I have a set of 997.2 turbo 6 piston calipers that are bare for 500 if anyone is interested.
Flatlined is offline  
Old 05-15-2019, 12:31 PM
  #24  
Capt. Obvious
User
 
Capt. Obvious's Avatar
 
Join Date: Dec 2011
Location: Renton, WA
Posts: 1,438
Default

Originally Posted by Quaz View Post
Then comes the pistons, they are 36/36/36 compared to 44/36. This is where I need to crunch some numbers and see how much that will screw up the bias and pedal travel. Pretty sure the Macan caliper is the way to go here though.
36mm x3 = 3054 square mm of piston, 36mm + 44mm = 2538 square mm of piston area
Capt. Obvious is offline  
 


Thread Tools
Search this Thread

Contact Us - About Us - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: