My Never Ending Brake Upgrade Project
06-21-2013, 01:11 PM
#17
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I am considering this BBK upgrade but if there is an affordable 380x28 rear BBK like front that directly bolt on wouldn't it be more sensible and cost effective than changing the MC and/or highly expensive BBK from Brembo.
03-30-2019, 04:17 AM
#18
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Join Date: Aug 2018
Location: Melbourne, Australia.
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These 5-spoke RUF wheels are amazing! What model are they?
That should be a nice improvement Scawt. Hope the brake line you got from me works out for you. You're going to like the 997GT3 brake master! You will definitely need to upgrade your
rear rotors to 350 from the stock 330s otherwise your brake bias will be out of balance as the rears will be underutilized and your braking will suffer. Even with the 350/350 set up you will
want to run a more aggressive pad in the rear as the rear calipers are fairly small on the 996 cars. PFC08/01 is popular as well as Pagid 29/14.
I used to run the 6pot 350/350 system with floating steel rotors and just upgraded to the 997.2 PCCB 380/350 system with slotted floating steel rotors. Cost was not much more than the
350/350 system but the performance difference is huge. If you are going to be seriously tracking the car, it might be something to consider before instaling the 996 six pots. Here is a write
up I did on 6bling the other day for someone going down the 380mm/350mm route:
I ended up having my 996TT based car converted to 380mm front and 350mm rear steel floating rotors but the only way to do this is to use the 997.2 PCCB calipers (225mm bolt spacing)
that are used on the 997TT with PCCB or the 997GT2/3 with PCCB. These are designed for use with 380mm front and 350mm rear rotors. The front 997TT or 997GT3 PCCB calipers are
visually the same but the piston area is about 10% smaller on the GT3 calipers which will give you a touch more rear bias and a slightly harder pedal. I have both the GT3 and TT versions
but have not compared one to the other yet. When you do this conversion, you will need to upgrade the brake master to the 997GT3 27mm version to firm up the brake pedal as you will be
pushing more fluid due to the larger 34mmx2 rear piston calipers. It goes without saying that you will need to upgrade the rear calipers to the larger 997TT/GT3 units with 350 rotors otherwise
your brake bias would be totally wrong.
I tested this brake set up at the track last weekend and it is phenomenal as far as heat dissipation goes. The greater rear bias from the larger rear calipers works extremely well and with the
larger 997GT3 master your brake pedal is rock hard. I use PFC 08 pads and Endless RF650 fluid and this set up feel exactly like the 380/350 PCCB set up on my friends 997GT3 RS and in my
opinion is far superior to the 996 GT3 six pot 350/350 set up that I ran before. On the surface, it does not necessarily brake any better than the 996GT3 350mm set up, or the stock TT 4 pot
330mm set up for that matter, but it does provide HUGELY better thermal dissipation when you hammer the car at the track for extended periods and it does shift the brake bias to the rear which
does help braking performance a bit compared to the 996 system. I do have all the GT3 cup cooling ducts on my car which further helps with cooling. The one thing you will need to be careful
of is the selection of wheels if you run the 380mm set up as only a hand full of 18" wheels will clear those brakes. My track 18x9 front wheel will clear the 380 calipers with about 3/16" to spare
but they are manufactured to work with the 380 set up. The silver 5 spoke wheels are 19x9/12 and the grey track wheels are 18x9/12 in the pics below. Hope that helps.
rear rotors to 350 from the stock 330s otherwise your brake bias will be out of balance as the rears will be underutilized and your braking will suffer. Even with the 350/350 set up you will
want to run a more aggressive pad in the rear as the rear calipers are fairly small on the 996 cars. PFC08/01 is popular as well as Pagid 29/14.
I used to run the 6pot 350/350 system with floating steel rotors and just upgraded to the 997.2 PCCB 380/350 system with slotted floating steel rotors. Cost was not much more than the
350/350 system but the performance difference is huge. If you are going to be seriously tracking the car, it might be something to consider before instaling the 996 six pots. Here is a write
up I did on 6bling the other day for someone going down the 380mm/350mm route:
I ended up having my 996TT based car converted to 380mm front and 350mm rear steel floating rotors but the only way to do this is to use the 997.2 PCCB calipers (225mm bolt spacing)
that are used on the 997TT with PCCB or the 997GT2/3 with PCCB. These are designed for use with 380mm front and 350mm rear rotors. The front 997TT or 997GT3 PCCB calipers are
visually the same but the piston area is about 10% smaller on the GT3 calipers which will give you a touch more rear bias and a slightly harder pedal. I have both the GT3 and TT versions
but have not compared one to the other yet. When you do this conversion, you will need to upgrade the brake master to the 997GT3 27mm version to firm up the brake pedal as you will be
pushing more fluid due to the larger 34mmx2 rear piston calipers. It goes without saying that you will need to upgrade the rear calipers to the larger 997TT/GT3 units with 350 rotors otherwise
your brake bias would be totally wrong.
I tested this brake set up at the track last weekend and it is phenomenal as far as heat dissipation goes. The greater rear bias from the larger rear calipers works extremely well and with the
larger 997GT3 master your brake pedal is rock hard. I use PFC 08 pads and Endless RF650 fluid and this set up feel exactly like the 380/350 PCCB set up on my friends 997GT3 RS and in my
opinion is far superior to the 996 GT3 six pot 350/350 set up that I ran before. On the surface, it does not necessarily brake any better than the 996GT3 350mm set up, or the stock TT 4 pot
330mm set up for that matter, but it does provide HUGELY better thermal dissipation when you hammer the car at the track for extended periods and it does shift the brake bias to the rear which
does help braking performance a bit compared to the 996 system. I do have all the GT3 cup cooling ducts on my car which further helps with cooling. The one thing you will need to be careful
of is the selection of wheels if you run the 380mm set up as only a hand full of 18" wheels will clear those brakes. My track 18x9 front wheel will clear the 380 calipers with about 3/16" to spare
but they are manufactured to work with the 380 set up. The silver 5 spoke wheels are 19x9/12 and the grey track wheels are 18x9/12 in the pics below. Hope that helps.
