07-11-2021, 08:29 PM | #23 | |
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Michelin (who has a vested interest in selling more tires) even has marketing campaigns centered around the fact that properly stored tires do not age and don't need to be replaced: Again, how they were stored is important, but 3-4-5 year old unused tires are just fine for track day use and will still continue to perform well. |
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07-12-2021, 02:50 AM | #24 |
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3-4 track days with no camber plates and this is how my tyres came out. The Millway plates have improved tyre wear and lap times. Amazed that functionality doesn't exist out of the box from BMW. All I need now are some track wheels, steel brakes, and GT4 aero bits! |
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07-12-2021, 03:32 AM | #25 | |
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The tyres aren't going to explode at this age. If they look fine, drive fine, then they're fine for a reasonably competent driver to just try them out and see how they feel. If they grip terribly (unlikely) then he can bin them. If their performance has marginally degraded... who cares, this isn't competitive and they'll get used up anyway and replaced after that. The race team comparison is silly. Any tiny loss in performance matters to them, it does not matter for a non-competitive track day. I have driven on 5 year old tyres on a track, I didn't die |
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07-12-2021, 10:50 AM | #26 |
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Finished up my first track event with the GTS in pure street stock form this past weekend at Road Atlanta. All I can say is WOW!!! This car is an absolute beast on track!! It has way more than enough power on the long straights. The CCBs are great but, I would like more bite to give me that confident feeling when braking late. I'm used to running BBKs with steels on PFC01 race pads. I had to lower the tire pressures to around 29/27 PSI cold which ended up at 34/32 PSI hot. I also noticed Sport+ steering is a bit twitchy. The suspension was purposely left on street settings and I can definitely feel the body roll and weight through high speed corners.
Anybody have recommendations on stiffer springs for the oem KWs? Current Mods: 1. Akrapovic Exhaust and downpipes 2. Larger front swaybar Future changes… 1. Camber Plates 2. Adjustable SPL/Fall-Line arms 3. Suspension at track height and track aero settings 4. Recaro Profi XL seats and harnesses (sliding around in stock seats sucks! Lol) 5. Alcon or AP BBK (run 18s and cut consumable costs) 6. 18" square wheel setup with wide sticky rubber 295-315. 7. Mono ball front bearings.
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07-12-2021, 03:31 PM | #27 | |
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After my first weekend at Sebring I had to replace the stock seats. I went with the factory euro seats. The Recaro will make a huge difference. No more holding on! I think all your future improvements will make a for a better track experience. Glad to see another Southeast GTS getting some time on the track. I'm sure your were hauling the mail down into Turn 10! |
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FormulaMMM3662.50 JustAnothaM4883.50 |
07-13-2021, 07:45 AM | #29 | ||
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The comparison to slicks is valid. Cup 2's aren't slicks, but they share advanced racing compounding -- "Developed for maximum performance on wet or dry surfaces with an endurance racing compound..." Skim coating, and other compound characteristics make them sensitive to degradation and loss of performance https://motoiq.com/not-all-michelin-...ed-the-same/4/ My "opinion" is that you probably shouldn't track with 6 year old Cup 2's that have been subjected to unknown use, temperature fluctuations, heat cycles, storage (most likely on the car, under load, underinflated at points), etc. This is the reality of virtually all GTS tires at this point. Add to the list 6 year old oil, or 6 year old brake fluid. It's July 2021 and time for any owners with original anything to refresh components subject to degradation before driving the car hard as intended. I have tracked both new and spent Cup 2. If novice GTS drivers are unwittingly using a spent set -- and again, who can know at this point? -- that's going to be much less enjoyable and less safe. As Cup 2's degrade, braking performance is one of the first things to go, so I'd advise GTS owners on original Cups to take that feedback into consideration. Your recommendation is that so long as recent hire Randy down at the tire shop gives them a looksie and gives the all clear, they're fine. To each their own. Quote:
Yes, real scenarios involving low mileage but old performance tires that were trash.
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07-13-2021, 07:56 AM | #30 | |
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Suggest following your instincts on the CCBs and swapping for iron setup. Definitely install camber plates, the car needs those. But before additional mods, go another round with the car lowered, full aero (looks halfway now), and track damper settings so you can determine what's really necessary. Then damper adjustments and optimization from there. I just tested various rebound adjustments and there's so much adjustability there. Found chunks of corner exit traction. If you want more tire durability & performance, Goodyear Supercar 3R in OE sizes are a great fit, more aggressive than the star spec Cup 2 and the type of tire they should have fitted from the factory imo. I'm on my 2nd set.
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07-13-2021, 10:24 PM | #31 |
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Holy hell folks didn't mean to turn my dumb question regarding the Cup 2s into a huge debate. I had a feeling they were done, but wanted a second opinion. I already bought new tires a month ago but they're coming on the sm-10's in 19's that are back ordered till next month. Probably the right call to toss the OEM cup 2s though since they had 7k miles on them and are pretty worn down anyways.
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07-13-2021, 11:25 PM | #32 | |
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Grey Matter:2008 E92 M3:608/425. SG/PS SOLD!
Dark Matter:2015 F80 M3:495/505. SOLD! Anti Matter :2016 F82 M4 GTS What next?!? A 2022 M235i GC- I must be getting old |
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07-14-2021, 05:57 AM | #33 | |
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Yeah if they're looking worn down, they probably wouldn't have lasted long on track anyway. |
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07-14-2021, 07:26 AM | #34 | |
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Do this for long enough, see many tire and brake failures on track, and you become a stickler on those components in particular.
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07-19-2021, 02:28 PM | #35 |
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Here is some interesting data regarding brake pad changes for the CCB's. James made the switch to Pagids.
https://youtu.be/LXzvq6NADfU |
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