Moochier

Thanks for the link. Yeah I had emailed Vision motorsports about their kit but had no reply, maybe I should chase them up again, looks good.

Moochier

I had also contacted John at BGB, but not heard back from him either. What are the differences in the std 996 GT3 and Cup calipers?

Are you just running girodisc or GT3 calipers as well? As for driving more smoothly... I've been told by numerous instructors that my driving is very smooth... but I'll keep trying!

Yeah my preference was the GT3 MS... I gather it's the 996 not 997 MS... given its the 996 the calipers are coming off?

Moochier

Will take a look thanks. But wanting to stay with OEM...

Cman21

You may want to check the cayman pccb part numbers and cross reference the specs to a 996 turbo with steel brakes to see if the measurements and rotor offsets match up.
I know on the cayman the brake booster and master cylinder are different part numbers along with the front calipers and uprights. Also the caliper bolts are longer front and rear on the pccb cayman car.
The brake bias would have to be changed in the ecu to the pccb setup as well.
Let us know what you find out.
Cman21

bernb6

"Thanks Uber, yes I've looked into the girodisc setup, and while it's a lot cheaper, I'm concerned it's not going to fix my issues."
Moochier, you don't mention what issues you're trying to fix. Soft pedal? Fading? Boiling fluid? No bite? Let us know your objectives.

Ubermensch

Sorry I'm slow on getting back on this thread. Bernb6 raises a valid question. What are you trying to fix? My experience in Caymans is limited to this setup. I read about all of the issues with soft pedals, fading, and overheating of rear brakes. From what I read, it appeared that the simplest approach was increasing the diameter of the disk and ensuring adequate airflow. My plan was to add some NACA ducting as necessary, and potentially change the MC, but so far I've had zero braking issues with this simple change (Girodisc, PFC06/08, Motul). So I kept it simple and didn't fix something that wasn't broken. At least with street tires this setup is more than adequate to lock up the wheels, the pedal feel is progressive and easy to modulate, and I don't boil fluid or experience fade. I've run it for 30 minute sessions and had similar results. Perhaps if I were doing enduros or running stickier rubber I'd feel differently, but so far so good.

Raph82

Good thread with brake info here,I too been having a bit of issues with my CR braking by now caliper are brownish.....and my Pagids rs29 are 3 qrtrs gone ....brakes does not feel good last few sessions i've done being this past Feb 20th last track day at Barber
i am really digging indeep to find best solution;
i'm running 660 motul,Gt3 MC, steel lines ,Pagid rs29 all 4's

GT3 6 pots front 350mm sebro rotors.
Stock calipers with Giro discs
AP kit looks awesome (New Porsche RSR are using them) if i'm not mistaking
Cayman R PCCB calipers with Cayman R PCCB Knuckles

Any solid help will definitely be viable

thx all

skxf430

Raph82,

Pagid pads are fairly soft and mushy feeling when you go beyond half thickness. I would change out your pads with either Ferodo, Endless or PFC. And, bleed your brakes with SRF or Endless fluid. You should feel a firmer pedal compared to before. Also, adding Olsen Motorsport brake ducts will certainly help keep your brake temps down too.

Raph82

skxf430

Thx for the info,actually just found out about Pagids being mushy half warned down,just decided to use them based on technician advice although fellow track friend does use PFC ones.
I will try try the following parts you've mentioned however i really would like a bigger setup up front 6 pots.
i see you cary Trophy Stoptech on you track car
by the way GOOD LUCK WITH THE SALE
nice car.

bernb6

I had very soft brakes/boiled brakes and finally gave up trying combinations of different fluids, GT3 MC, pads and went to a Stoptech BBK. The difference was night and day. My guess is that one of my calipers was sprung but going to the BBK resolved all my issues. Re 6 pot fronts - I didn't get them and, in my opinion, they're not needed. They offer a marginal improvement is keeping heat out of the front calipers but don't offer any additional braking capacity. Detriments are cost and more difficulty in getting the brakes up to temp as a daily driver.
Good luck,
Bern

skxf430

Thanks for the compliment.

The Stoptechs were a nice improvement over the stock setup. The front Vision upgrade was roughly $4k and I was able to get both Stoptech Trophy front and rear for not much more. My original rears needing rebuilding so getting the Stoptechs was a no brainer.

Also, Olsen Motorsports makes a nice front brake duct kit which is recommended as well.

Schmidts Cat

I have the stoptechs too on my 2010 "smurf" CS. Great setup.

Raph82

Sounds good guys!

I think i will pull the trigger on the trophy front set up and match it with my stock rear calipers(that will need rebuilt soon)
i'll also give Olsen a buzz about his duct system .
the only thing is obviously calipers has to match front and rear some how,
PAINT and PADS compound.

THx again any additional info will be greatly appreciated .

Moochier

Hi Guys, thanks for your input on this. Im really struggling to find more info about this upgrade, yet i hear many have done it before. Ive found bits of info all over the place and have pieced together the below.

While id like to go with Vision Motorsports kit, our rules here prohibit adaptors etc... So I'm going to replace the carriers to bolt them straight up, as oem.

My question is I'm needing help identifying part numbers to ensure i order the correct carriers to bolt the callipers to. This is my current parts list, please can someone with experience on this upgrade help double check my parts.

Its mainly around which carriers as i read somewhere that best to go with the 987 PCCB carriers not the GT3 carriers, yet others dispute this and say go GT3 carriers! Which is it?!

Also some say when using the PCCB carriers you need to use the rotors from a 997 Turbo, not GT3 as they have a 2mm height difference, yet both 350mm diameter.

I have referenced the PET for 987, 996GT3 and 997GT3 to ensure part numbers are correct for the part... but will the parts work together?

All help is appreciated as this gets complicated! Cheers

Brake disc left - GT3 350mm 997.351.409.90 1
brake disc right - GT3 350mm 997.351.410.90 1
Caliper left - GT3 997.1 996.351.431.90 1
caliper right - GT3 997.1 996.351.432.90 1
set of front brake pads pagid RST3 1
connecting line 987 I450 996.351.961.30 2
caliper bolts GT3 - 997.1 999.067.047.09 4
damping plates - GT3 997.1 996.352.086.01 6
Splash cover plate left 987 I450 997.351.805.05 1
Splash cover plate right - 987 I450 997.351.806.05 1
Hex head bolts - 987 I450 999.217.116.01 2
wheel carrier left - 987 I450 997.341.157.25 1
wheel carrier right - 987 I450 997.341.158.25 1
tension bolt - 987 I450 997.341.131.00 2
Angular contact bearing - 987 I450 999.053.054.05 2
hexagon head bolt - 987 I450 999.217.042.04 8
hexagon nut - 987 I450 999.084.634.02 2
GT3 master cylinder - GT3 997.1 997.355.910.30 1

Sorry for the ****e formatting, tried a few different ways and this was the clearest!

Moochier

Just an update... I did pull the trigger on the GT3 front brake upgrade, the parts list above is close to what I ended up doing, with a few changes... anyone interested in the exact parts list let me know.

I have 2 track days on these new brakes and I must say.... MASSIVE IMPROVEMENT! Great pedal feel, no heat issues, consistent all session/day long.

So not I'm left pondering the rear brakes... these seem a bit more tricky to upgrade given the different offset to 911 rotors.

Anyone upgraded rear brakes on a 987 Cayman?

Options appear to be:
Girodisc 325mm with OEM calliper
Girodisc 350 x 28 PCCB replacement with new callipers
993 4S or TT 322 x 28 rear rotors with new callipers

Any opinions?

What I'm now trying to improve now is brake bias, as the rears seem over powered by the new 6 pot fronts.

Thanks