Dorkiphus.net - to girodisc or not to girodisc

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- Track Talk (https://dorkiphus.net/porsche/forumdisplay.php?f=56)

- - to girodisc or not to girodisc (https://dorkiphus.net/porsche/showthread.php?t=39664)

Quote:

Originally Posted by BMAN (Post 621553)

I have a set of 18” track wheels from a 987.2 on our 981. Fitment is fine. Tire diameters for the 981 are greater, +/- 1”, front and rear IIRC.

Have your tried your 987.2 wheels?

the 987 track wheels are toast

i am thinking if i use the supplied 20 inch p-zero tires that are on the car next weekend, i will not over drive the car

it will be abit before i have roll bar, seats, and harness anyway

i think i would like black wheels

Quote:

Originally Posted by Otto (Post 621576)

the 987 track wheels are toast

opps, sorry!

“plan to only drive the car at 80% until i get it all sorted”

Is that 80% of 120%? JK!

Why did Porsche think it acceptable to enclose the caliper so pads can’t be swapped and use steel bolts threaded into aluminum? Studs ftw.

+1 on PFC 08. I got amazing durability and no fade and great feel until the pads were down to 2mm. But I brake only when waiting for VASteve to point.

Quote:

Originally Posted by roundel (Post 621602)

Why did Porsche think it acceptable to enclose the caliper so pads can’t be swapped

Stiffer caliper with a closed back.

Quote:

and use steel bolts threaded into aluminum? Studs ftw.

Yeah, that part was stupid.

ed

Sorry I didn't see this till now. I ran stock rotors the first season with my 981S with Pagid Yellows and the stopping power was fine. I did upgrade to Girodiscs and see the main benefit as longer life (fewer rotor swaps) and cooler brakes because they are slightly larger diameter and dissipate heat better. I swear the pads are lasting longer, but maybe I'm just braking less! Still running my first set of Girodiscs after quite a few events. I do recommend replacing the caliper bolts with studs - less risk of stripping the threads in the hub - an expensive mistake. Also, I found no need to replace the master cylinder. The 987s benefitted greatly from the GT3 master cylinder upgrade - much firmer pedal feel. But the 981S must have a 911 master cylinder - once I went to braided lines and the Giro's, the pedal feel is very firm and confidence inspiring. See ya at Pitt!

Cheers
Ed
981S #37

Quote:

Originally Posted by Otto (Post 621455)

is it better to go with a bbk from stoptech, ap, or brembo for $3k-$4k per axle or to simply go with existing calipers, caliper studs with spacers, and slightly larger floating disc rotors from girodisc for way less than $3k for both axles?

i am leaning girodisc

i would also upgrade the brake lines, add a trw/gt3 master, and gt2 front brake ducts, along with wheel studs

and this is the big ask!

do any of my pca friends with a lift want to help make this conversion this saturday?

981 cayman s wrenching experience would be helpful :lol:

crazy i know

otto

thanks ed

i don't know why i was thinking the brakes on a 981 were not much different than those on a 987, but the front brakes are definitely must improved

dirk did say i was over thinking it again :-)

for now i am going to burn the stock rotors that are on the car

then we will see

so i have a gt3/trw master new in a box for sale

i also have a set of gt2 front brake ducts - do you think those are worth putting on?

so i am going with pagid yellow on front and pf08 bads rear for now

i will most likely replace rotor discs with sebro slotted

Quote:

Originally Posted by edw (Post 621717)

Always worth getting more air to brakes! Keep the MC, you know you will want it next month.

Quote:

Originally Posted by roundel (Post 621602)

+1 on PFC 08. I got amazing durability and no fade and great feel until the pads were down to 2mm. But I brake only when waiting for VASteve to point.

:shock::lol: