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718 S GTS GiroDisc Rotor Install - Review

16290 Views 46 Replies 16 Participants Last post by  don
Just thought I'd post my experience/review of the Girodisc Rotors for 718 S/GTS models.

Firstly, the larger GiroDisc are not any lighter than OEM but with the alloy hats the weights come out very similar so there is not really any weight penalisation. If you want to go lighter carbon ceramics seem to be the only option.

I used our regular bathroom scales so not the most accurate but you get an idea:

OEM Front 330mm Rotor 9.7kg, GiroDisc 350mm Front Rotor 10.3kg (measured ~ 353mm)

OEM Rear 299mm Rotors 5.6kg, GiroDisc 325mm Rear Rotors 5.7kg (note these measured closer to ~322mm)

As far as braking goes there might be a perceived psychological improvement but otherwise no issues and I have not noticed any fade even after 5 or 6 laps on a short track. I did have to get my workshop to adjust the rear E-brake so the hub tolerances must have been marginally different.

Asthetically I think they look nice, particularly the anodised alloy hats in contrast to the OEM Porsche rotors which always look rusty.

Here is what's in the kit including front and rear caliper spacers and longer bolts:



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Very nice Don! Those new rotors do indeed look very fetching. And I get where you are coming from about the rust on the OEM rotor hats being cosmetically annoying.

Having said that I just got new rotors/pads/fluid as well (and Cup2s +wheel align aiming for max symmetrical negative camber). But I stayed with OEM as they have served me well on the track and during daily drive usage (plus that's what my workshop recommended for my level of track experience/usage).

If you don't mind me asking, what were the cost of the Girodisc rotors compared to OEM?

Also which track did you go to? I'm still enjoying Luddenham (and making improvements every time I go) but I'm also on the lookout for new tracks to try out :)
Also with the straight slot rotors, did you notice any different noise or vibrations during hard or high speed braking?
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