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Just 2 people in the car - under 400lbs - spirited driving, I’ve got the stock Pirellis set at F/33 - R/39 they gain 2 to 3 psi while driving — the fronts are getting pushed too much to where they roll slightly on to the side just where the word OUTSIDE appears on the sidewall — I’m guessing that more pressure up front (35/37psi) should solve/stop this and would that in itself ultimately provide better grip....? anyone have good or basic tire knowledge ?
I have two different pressures I run in my Porsche tires for colder weather and for summer, these work for where I live and drive. Colder months I run 34/38 cold, usually they run 38/42 driving, in the summer I run 30/36 cold, they will run 38/44 when fully abused
I swear the inside of my door says something like 51psi
It doesn't. It will have a comfort load setting, and a full load / high speed setting. That said, mine were 51 psi - which made the care SUPER jittery with SPASM. No bueno. Adjust it down, and you will like the car a lot more.
It doesn't. It will have a comfort load setting, and a full load / high speed setting. That said, mine were 51 psi - which made the care SUPER jittery with SPASM. No bueno. Adjust it down, and you will like the car a lot more.
I checked, it' says 48 cold, which tends to get up to 50/51 warm. Is that actually bad to follow? Or are people adjusting to just make it more comfortable based on personal preference?
My 2021 C2S can be run at three different tire pressure settings.
Tire pressures are measured when they are at ambient temperature. For those who are OCD afflicted, that's a tire that hasn't been driven for 6 hours or more.
"Comfort Pressure" / Front: 29 PSI, Rear: 32 PSI
Standard / Front: 33 PSI, Rear: 38 PSI
"Full Load" / Front: 36 PSI, Rear: 45 PSI
The PCM lets you set the systems tire pressure expectations for the "Comfort Pressure" or "Full Load" by checking the respective box as shown below. If you do not check either box, the systems tire pressure expectation is for what I call the Standard Pressures. Porsche doesn't actually give that middle setting a formal name.
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The interface on the TTS i believe is different (i'll check that later this evening) - I will try F/35 - R/39/40 as the front is whats getting the push, so a 2psi incremental change may test solve it - the rears have not flexed at all with 39 - i'm not getting away with more than a .75g factor (wife wakes up and sends her message in to my shoulder at anything over .75)
Daily-drive 992TTS w/Sport chassis (chassis in normal setting; rest in SportPlus/Individual), Pirellis @39/49: on bumpy urban surface streets daily and on weekends on reasonably smooth suburban freeways & mountain twisties: marvel about 992TTS' steering precision and feeling of lightness (vs 500lb lighter 991.2 GTS w/similar set-up (ex-Mich PS4S) on similar interesting roads)
Recently drove colleague's 992TTS w/o Sport chassis, w/Pirellis @39/49 in brief drive on urban surface streets and on fairly straight urban freeways (@legal speeds): could immediately sense sloppy steering precision in that quick drive: so pleased that I had opted for Sport chassis option....and that brief drive solidified my decision to opt for 992GT3 (late June build; will trade-in TTS upon GT3 arrival; and GT3 will be similarly daily-enjoyed)
Suspect choices of tire P's (and presumably tires, not that one has a choice@delivery) and one's chassis settings are critical if one is fairly perceptive about balance of chassis precision vs stability, esp vs different pavement qualities/rapid direction&camber changes/different speeds, etc etc
If you do not care about tire life, switch to MSC2s or Dunlop Race Max 2s
Run 32/34 cold, turns 992 TTS into much softer and better handling car!
Tracking , 25/26 cold. Hot 33/34 max
04-26-2021, 10:12 PM
Tire pressures - basic knowledge ?
