380mm PCCB to 350mm steel 997.1 GT3
#1
Instructor
Thread Starter
380mm PCCB to 350mm steel 997.1 GT3
I purchased a 2007 GT3 which I will be picking up in a week.A tuner told me that a spacer could be removed from a stock 7.1 GT3 PCCB front caliper to be able to use 350 mm steel rotors of OEM and various aftermarket types in the front, and 350 mm turbo rotors in the rear. This would be the reverse of using spacers to increase to 380 mm rotors? If this is true, what models of turbo rotors fit the car? 996TT in the front and 997TT in the rear? I am doing this for cost reasons, as I do not want to spend $1600 plus on PFC or Girodisc, plus the additional pad cost for 380 mm rotors. If I desire additional braking power up front, I can always go to the larger rotors in the future.Thanks for the help!
#3
Instructor
Thread Starter
DE car only (not racing), with some daily driving once weekly or so. I want to use steel rotors instead of PCCB, but try to use generic rotors if possible. I did this with my C2S at Sebring with PFC08 pads and the brakes were actually very good, with 330 mm rotors and 4 pot calipers up front. I ran 2:32's with no brake overheating and had a fun time. I want to learn to drive the GT3 correctly and smoothly, not worrying about being the fastest, and not spend $3k on brake changes. The car already has safety equipment in it, along with OEM GT3 buckets/harnesses I had in my C2S, so I just need track wheels/tires, as my old ones will not fit, and different brakes, then HAVE FUN!!
#4
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There is a thread in the DYI section for installing 380mm Cup steel rotor but you'll need Cup "size" front pads to clear the larger diameter hat.
997TT rear steel rotors are a direct fit for the GT3 rear.
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PCA National Instructor
TPC Racing stats:
2023 Porsche Sprint Challenge 992 Cup Am Champion
2023 Porsche Sprint Challenge GT4 Pro-Am Team Champion
2022 Porsche Sprint Challenge 992 Cup & 991 Cup Champion
2020 IMSA GT3 Cup Challenge 2nd Championship
2018 IMSA GT3 Cup Challenge 2nd Championship
2016 IMSA GT3 Cup Challenge Champion
2013 IMSA GT3 Cup Challenge Champion
2006 Rolex-24 @ Daytona GT Champion
2004 Grand-Am SGS Class Champion
PCA National Instructor
TPC Racing stats:
2023 Porsche Sprint Challenge 992 Cup Am Champion
2023 Porsche Sprint Challenge GT4 Pro-Am Team Champion
2022 Porsche Sprint Challenge 992 Cup & 991 Cup Champion
2020 IMSA GT3 Cup Challenge 2nd Championship
2018 IMSA GT3 Cup Challenge 2nd Championship
2016 IMSA GT3 Cup Challenge Champion
2013 IMSA GT3 Cup Challenge Champion
2006 Rolex-24 @ Daytona GT Champion
2004 Grand-Am SGS Class Champion
#5
Rennlist Member
Nothing like someone that has been there and done it.
Thanks, Tom
Thanks, Tom
#7
I purchased a 2007 GT3 which I will be picking up in a week.A tuner told me that a spacer could be removed from a stock 7.1 GT3 PCCB front caliper to be able to use 350 mm steel rotors of OEM and various aftermarket types in the front, and 350 mm turbo rotors in the rear. This would be the reverse of using spacers to increase to 380 mm rotors? If this is true, what models of turbo rotors fit the car? 996TT in the front and 997TT in the rear? I am doing this for cost reasons, as I do not want to spend $1600 plus on PFC or Girodisc, plus the additional pad cost for 380 mm rotors. If I desire additional braking power up front, I can always go to the larger rotors in the future.Thanks for the help!
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