987.2 Cayman PDK track upgrades

[Babw]

I’m going to be picking up my first Porsche in a week which is a 987.2 Cayman PDK with PASM, sport chrono, PSE etc

It is approaching 80k miles however has been well maintained through the Porsche main dealer network and on warranty. I chose a slightly higher miles car as I will be doing as many track days as possible, time limiting this should be 7-8 this year. Spa booked in March which I need to prep the car for.

I’ve spoken to a well renowned specialist who has advised a Wavetrac LSD, Girodiscs, RS29’s, GT3 MC, lines + fluid and alignment.

I like the idea of an LSD, the brakes however are pricey. Are girodiscs worth it?

Anything else I should be considering? The current tyres are 19” Goodyear Eagle F1s.

[Babw]

Great input there Pothole, I had no idea regarding the different gearbox sizes.

Do you run an LSD in yours and do you feel like they need one?

What brake rotors would you advice as replacements? The ones on the car are coming up to 12k miles old and slight inner face corrosion as noted by Porsche at its last inspection.

(Out of interest I thought I remembered your username and realised that you used to run an MR2 MK3 which I also have.)

[Babw]

Quite worrying reading if I’m to be honest and quite tempted to get the car on track with an open diff to see how it handles first.

I don’t want to create a track/race car but a road car that will handle the increased workload of tracks such as Spa/Ring without major issues. I won’t be going coilovers, slicks etc as I’m not chasing lap times but coming from front engine rear drive cars I expected an LSD to improve things.

It’s Ninemeister who advised the above upgrades and they mentioned they had installed Wavetracs on a number of 987 PDKs without major issues, one being an R that gets regular track work.

[Babw]

Interesting that Ninemeister advised with stock suspension running stock dampers, it would be unnecessary to have adjustable lower arms and tyre wear would not be an issue on track with a more track orientated geo setup. They also advised the GT3 MC for a more positive pedal feel so quite contradictory to your findings 911R.

The LSD and Girodiscs are what I need to decide over. I’ve almost convinced myself that I need those as my other sporty cars have aggressive diffs and aftermarket brake kits which have improved the sportiness considerably.

I’m not looking for an out and out track car so no plans for buckets, track spec tyres etc

Edited by Babw on Friday 21st February 21:14

[Babw]

Has anyone experienced any overheating on track whether engine or diff/gearbox?

Reading some of the American forums, it seems to be a regular occurrence however their ambient temps will be higher.

[Babw]

Suspension wise I’m going to go with a DSC Sport controller for the oem active dampers, I’ve got the same setup on my GTR and it transformed the breadth of the suspension ability plus ability to upload custom maps to the suspension controller.

I always thought tyre shoulder wear was due to toe (toe in inside wear and toe out outside wear) rather than a camber issue?

I’ve spoken to a 987.2 PDK owner who runs a Wavetrac with very good results so I’m still tempted.

[Babw]

To update this, I went and had the following carried out on the car at Ninemeister in Warrington.

Wavetrac diff
PDK service and oil change
Girodisc, ti shims, RS29 pads, Goodridge lines and new fluid
GT3 master cylinder
New control arms (stock) with track biased geo

The car is transformed to be honest. The diff has made the car more composed and predictable, this maybe because I am used to driving cars with an LSD and my driving style is accustom to this but I feel fare more comfortable pushing the car than I did before.

The GT3 MC has reduced the travel of the brake pedal, when I drive PDK/DCT type cars I only left foot brake so again it suits my driving style. With a manual I expect the lack of travel or the now large discrepancy between brake - throttle would make heel toeing more difficult.

I've also ordered a DSC sport controller to see what the stock suspension is capable of as I have had very good results with one on my GTR.

The car is a joy to drive and although over 30% of the purchase cost of the car, the upgrades are a welcome addition.

[Babw]

Pothole Racing said:

Nice work getting all the upgrades done! Any track time booked in to test them?

Be interested to hear any feedback with the Wavetrac diff after some track time.

With the current climate I'm not jumping at any track days but I do have a couple of Circuit days credits I need to use up so hopefully in the near future.

Will report back after more use but the diff has really improved the rear end of the car IMO.