What did you do with your 718 this week?

[J-Dub]

Tim,
Those details are very helpful. I have been looking at Tarett's website and thinking about a long term(maybe mid term) strategy to add more camber. Still not sure about the camber plates vs lower arms, camber plates are significantly cheaper.

Do either the camber plates or the rear toe arms add any noticeable NVH?

[J-Dub]

In the mail today I received a very nice box containing a pen from Porsche Cars North America. It is quite a nice pen, CF, Porsche logo, has a nice heft and two ink refills.

When I purchased the car I got a Porsche logo pen along with a couple Porsche logo key chains.

All these pens, still none fit the glove box slot.

Just installed a mechanical pencil, I feel better now.

[blueline]

Tim,
Those details are very helpful. I have been looking at Tarett's website and thinking about a long term(maybe mid term) strategy to add more camber. Still not sure about the camber plates vs lower arms, camber plates are significantly cheaper.

Do either the camber plates or the rear toe arms add any noticeable NVH?

No NVH whatsoever, at least non noticeable to me. However, I'm used to and comfortable with a harsher ride so that might explain some of it. But for sure, no new or unusual vibrations or suspension noises. They've been on since July 2022.

As for the Tarett vs camber plates, Porsche says "nein" for the GT4 due to clearance issues. Don't quote me on this, but I think you're ok with add-on camber plates on a Cayman 4.0 GTS. Plates are fine for a GT3 and, while the GT4 uses much of the same front end as a GT3, the problem is that the diff front end parts create a wheel-well clearance issue on GT4's if using plates, at least that's how I understand it. Someone with more knowledge will know better so best to get other input on that.

I will say that the Tarett components have been great and are an excellent (but costlier) option. I've been very pleased with everything. Plus, they (Tarett) were really good to work with and were helpful at answering my simple questions. Based on my experience, I would have no reservations recommending them to anyone.

[J-Dub]

Tim,
Regarding the rear toe links, both TPC and Tarett seem to claim to have the most bump steer correction available. Do you know how much offset and where the offset is added for this bump steer correction? It seems it must be the knuckle side but neither webpage offers a good image of them installed.

[blueline]

Tim,
Regarding the rear toe links, both TPC and Tarett seem to claim to have the most bump steer correction available. Do you know how much offset and where the offset is added for this bump steer correction? It seems it must be the knuckle side but neither webpage offers a good image of them installed.

I don't know that answer - I'm not much of a mechanic!

I bet if you called Tarett or TPC they'd give you a straight answer.

By the way, I was looking at TPC too but kind of flipped a coin (metaphorically speaking) and called Tarett. I knew others using their components and liked the conversation I had, so I ordered from them.

[blueline]

Tim,
Regarding the rear toe links, both TPC and Tarett seem to claim to have the most bump steer correction available. Do you know how much offset and where the offset is added for this bump steer correction? It seems it must be the knuckle side but neither webpage offers a good image of them installed.

@J-Dub

Fellow Carpokean 'Jet Fuel Only' (Danial) has an excellent video on the Tarett front monoball and rear toe-link upgrades that might help. Also, I am sure that he can answer your question if the video doesn't.

Cheers!

[J-Dub]

I had another successful 2 day track event with my Cayman GTS. So far I don't feel the lack of camber is holding me back, the tire wear looks very even. The car accelerates, turns, brakes and is over all stable. It is a better car than my driving skills for sure.

Tim, thanks for the details on your Tarett parts. Good to have real world feedback, this upgrade is on the back burner for the minute. I likely won't be tracking the car till the fall/winter as we take the summer off here in Phoenix.

The Softronics tune seems pretty brilliant, the engine torque is smooth and consistent. It feels like the torque dips below 5K rpms are much better, it pulls down there now. The drive ability is improved and of course the car is fast.
I have two version of the tune, one with the factory PSE valve strategy and one with an on/off strategy. So far I have only tried the version with the on/off strategy and I really like it. I appreciate how the the cars behavior is more consistent now, with the GTS even in sports or sports+ I can still turn the exhaust off if I am in a situation where I am at 2,000 rpms with light throttle and getting that annoying drone. This is the first time I was able to hear the drone and now I am wondering about the over axle pipes with the resonators.

Have any of you tested the DSC controller for the PASM system? I received a raving review of this product this weekend at the track by the owner of a GT4.

The car started leaking what looks like windshield washer fluid at the driver side jack point, which is right below the washer tank. A quick google seems to show this is a somewhat common issue as the fill tube connection to the tank is not at the top of the tank and if overfilled or driven hard can leak at the connection between the fill tube and tank. What is not yet clear is if there is a easy way to make the seal better between the fill tube and tank.

[blueline]

I had another successful 2 day track event with my Cayman GTS. So far I don't feel the lack of camber is holding me back, the tire wear looks very even. The car accelerates, turns, brakes and is over all stable. It is a better car than my driving skills for sure.

Tim, thanks for the details on your Tarett parts. Good to have real world feedback, this upgrade is on the back burner for the minute. I likely won't be tracking the car till the fall/winter as we take the summer off here in Phoenix.

The Softronics tune seems pretty brilliant, the engine torque is smooth and consistent. It feels like the torque dips below 5K rps are much better, it pulls down there now. The drive ability is improved and of course the car is fast.
I have two version of the tune, one with the factory PSE valve strategy and one with an on/off strategy. So far I have only tried the version with the on/off strategy and so far I really like it. I appreciate how the the cars behavior is more consistent now, with the GTS even in sports or sports+ I can still turn the exhaust off if I am in a situation where I am at 2,000 rpms with light throttle and getting that annoying drone. This is the first time I was able to hear the drone and now I am wondering about the over axle pipes with the resonators.

Have any of you tested the DSC controller for the PASM system? I received a raving review of this product this weekend at the track by the owner of a GT4.

The car started leaking what looks like windshield washer fluid at the driver side jack point, which is right below the washer tank. A quick google seems to show this is a somewhat common issue as the fill tube connection to the tank is not at the top of the tank and if overfilled or driven hard can leak at the connection between the fill tube and tank. What is not yet clear is if there is a easy way to make the seal better between the fill tube and tank.

I've had TPC Racing's DSC suspension controller on the GT4 since last July.

After talking to TPC, I went with their default setting for my car. They have videos explaining how to custom tune the DSC but I have never gotten that deep in the weeds with the device. (Would need to take a laptop to the track and then I'd be fiddling with something I know little about rather than driving.)

Anyway, TPC felt that the default GT4 setup was fine for normal track day stuff, although they did tell me that it could be fun to play around with diff settings.

As for how well it works, I will say that the car and the suspension feels better but, without side-by-side immediate comparisons, do I really have a handle on how much better? It would be nice to be able to experiment.

The Softronics and other tunes are interesting to me but I'll probably wait before going in that direction, if ever. The car is built for the track but driving one that hard still puts a lot of stress everywhere so I am reluctant to make engine tune changes at this point.

Tires - good that you had minimal wear. Do you have an idea of how many at-speed track miles you put on in the 2-days? What tires are you running and was this the first track outing for those particular tires? As you drive harder, I think you'll see more wear, depending on the demands of the track you're on. I get about 300 to 325 miles on a set of MPSC2's - that's it. Three track days max.

[J-Dub]

So far I have 4 track days on these tires, 235/35/20 and 265/35/20 PS4S, two 2 day events. Based on the date stamps and tread wear I believe the fronts to be original to the car and the rears were replaced not long before I bought the car...2021 Cayman GTS 4.0 purchased CPO 28-Feb-2023.
Each track day consists of 4 25 minute sessions, this past weekend it was quite hot so I expect I used more tire than the previous event. If you are getting only three track days out of Cup2s then I either need to drive harder or maybe the PS4S is a better choice for me at the moment.

Planning to go to the GT4 size tires next of 245/35/20 and 295/30/20 likely PS4S N0 spec PS4s. A set of Cup2 tires did show up in the classifieds a few days ago in my town in the GT4/Spyder spec, that is a bit interesting. Seems I can get either PS4s or Cup2s from tire rack or discount tire for around 1800 plus mounting. The used set is on offer for 1000 with 5000 miles.

The DSC controller is currently on back order for another month or so. When I watch the TPC youtube videos on the controller and the tuning, it looks just so fun to me to be able to make tuning changes.

What brake pads are you running? I am currently running the stock pads and rotors but the rotors are already lipped so those are on the list of future maintenance.

[blueline]

So far I have 4 track days on these tires, 235/35/20 and 265/35/20 PS4S, two 2 day events. Based on the date stamps and tread wear I believe the fronts to be original to the car and the rears were replaced not long before I bought the car...2021 Cayman GTS 4.0 purchased CPO 28-Feb-2023.
Each track day consists of 4 25 minute sessions, this past weekend it was quite hot so I expect I used more tire than the previous event. If you are getting only three track days out of Cup2s then I either need to drive harder or maybe the PS4S is a better choice for me at the moment.

Planning to go to the GT4 size tires next of 245/35/20 and 295/30/20 likely PS4S N0 spec PS4s. A set of Cup2 tires did show up in the classifieds a few days ago in my town in the GT4/Spyder spec, that is a bit interesting. Seems I can get either PS4s or Cup2s from tire rack or discount tire for around 1800 plus mounting. The used set is on offer for 1000 with 5000 miles.

The DSC controller is currently on back order for another month or so. When I watch the TPC youtube videos on the controller and the tuning, it looks just so fun to me to be able to make tuning changes.

What brake pads are you running? I am currently running the stock pads and rotors but the rotors are already lipped so those are on the list of future maintenance.

PS4S have 300 tread wear vs 180 for MPSC2 so PS4S will last a bit longer. Tire wear will vary depending on driving style, track layout, track surface, tire temps, ambient temps, pressures, alignment and more. As you get faster, wear will increase but let that come naturally - don't overdo it thinking you might not be driving hard enough.

Based on some of your how-to posts regarding Porsche PCM software I know you'd be great at figuring out and making changes to a DSC. Might have to bug you for guidance once you have it all down!

I use Essex/AP Racing Competition J-Hook rotors and Ferodo DS3.12 race pads. They are excellent but not cheap. Essex does not sell retail but there are plenty of retailers around the country. (Essex usually drop ships for their retailers.)

Essex and Jeff Ritter (who manages their hi-performace division), has a YouTube channel w/excellent videos regarding brakes.

https://www.essexparts.com/company-information/our-team
https://www.youtube.com/@essexpartsservicesbrakeexperts