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I run my Bridgstone RE 71R at 34F and 37R cold. You should try and let some air out. The rear at 44psi probably isn't helping the harsh feeling you're talking about.
But one thing at a time. Adjust your PSS10s first and then if still not happy adjust your tires.
Agree with all of this, try something in the mid thirties all around. That should improve ride quality.
But one thing at a time. Adjust your PSS10s first and then if still not happy adjust your tires.
I would lower those tire pressures immediately, 44R is way too high. Most people run in the 34F/36R range. The 44PSI spec on the sticker is if you're running your car at max load. It's dumb they did it this way, very misleading.
I would lower those tire pressures immediately, 44R is way too high. Most people run in the 34F/36R range. The 44PSI spec on the sticker is if you're running your car at max load. It's dumb they did it this way, very misleading.
I second this. I'm at 36/39 and may go down to 38 in the back. May try even lower because it's pretty easy for me to power oversteer without an LSD (also may get the Guard LSD and spend some time installing it myself with some assistance).
My tires: Michelin Pilot Sport 225/40 front, 285/30 in the back.
I'm currently enjoying 5 front/6 rear settings on the pss10 with the lower spring rates. Overall, it's a huge improvement without compromising responsiveness and I drive around SF a lot.
Continental Extreme Sport XL with the recommend pressures which is 36f and 44r.
May it's a little less, certainly depending on the temperature.
G
Post your tire and rim sizes too. Both make a world of difference when it comes to determining proper tire pressure.
I’ve been running PS2’s at 32/39 with 235/40/18 & 315/30/18 on 9’s and 12’s. This is a great starting point since it’s the same recommend pressures for the 996 GT2. It ran similar wheel/tires sizes and weights similar. I’ve gone down to 37 rear and liked that too. Got really even tire wear at that pressure. The fronts like 31-32. Still playing around with both a bit lately. Trying for better turn in without the rear being to tail happy.
I don't mean to hijack the thread, however, I have just installed 18" wheels/tires (Michelin PS4) and have not heard apparently many are running a lower pressure than the recommended 44 psi rear.
Any further input on this would be appreciated. You can PM if you'd like, to avoid clogging up this thread. Thank you.
I’ve experimented with a lot of different tire pressures and what works best for me is 31/32 on Michelins at 225/265 and then I run a little lower on RE71r at 235/275. REs are run lower because they seem able to handle it (stiffer sidewall) and they heat up more since I push them harder. Once they are over 35 or 36 hot, the grip starts to fall off, so it feels better to start lower cold. The Michelins are more forgiving of a range of pressures, but low 30s has been the sweet spot.
What I’ve found works best is to air up, then go to your favorite stretch of road. Run it repeatedly, lowering pressure a pound or two on each run until you find what you like. That will give you your hot pressure target. Drive home, let the tires cool, measure again. That’s your cold pressure. I like a 1 pound difference cold, since the rears heat up quite a bit more than the front and I end up with 2 to 3 pounds difference once the tires are hot. Also, not a bad way to spend an afternoon .
I’ve experimented with a lot of different tire pressures and what works best for me is 31/32 on Michelins at 225/265 and then I run a little lower on RE71r at 235/275. REs are run lower because they seem able to handle it (stiffer sidewall) and they heat up more since I push them harder. Once they are over 35 or 36 hot, the grip starts to fall off, so it feels better to start lower cold. The Michelins are more forgiving of a range of pressures, but low 30s has been the sweet spot.
What I’ve found works best is to air up, then go to your favorite stretch of road. Run it repeatedly, lowering pressure a pound or two on each run until you find what you like. That will give you your hot pressure target. Drive home, let the tires cool, measure again. That’s your cold pressure. I like a 1 pound difference cold, since the rears heat up quite a bit more than the front and I end up with 2 to 3 pounds difference once the tires are hot. Also, not a bad way to spend an afternoon .
Good luck!
This is where I am at. On the street I am not putting a ton of heat into them so ~32-33 cold with hankook rs4 shooting for 35 hot. Anything much higher and grip starts to fall off.
On the track I can get ~10psi into my r comps, so those I start closer to 25psi cold.
I don't mean to hijack the thread, however, I have just installed 18" wheels/tires (Michelin PS4) and have not heard apparently many are running a lower pressure than the recommended 44 psi rear.
With the tire pressure sticker, you have to read the fine print. These pressures are for "vehicle capacity weight," i.e. four people/661 pounds of additional weight. It's strange and misleading that Porsche did it this way, because most people just look at the chart and don't notice the caveat, but there were probably lawyers involved so I suppose it makes sense.
With the tire pressure sticker, you have to read the fine print. These pressures are for "vehicle capacity weight," i.e. four people/661 pounds of additional weight. It's strange and misleading that Porsche did it this way, because most people just look at the chart and don't notice the caveat, but there were probably lawyers involved so I suppose it makes sense.
Yeah, I'm 140lbs even and 99% of the time the only person in the car.
Gonna start reducing in increments and see how it feels. If I can get the settings up on the PSS10's with lower pressures in the tires then that would be ideal!
I’ve experimented with a lot of different tire pressures and what works best for me is 31/32 on Michelins at 225/265 and then I run a little lower on RE71r at 235/275. REs are run lower because they seem able to handle it (stiffer sidewall) and they heat up more since I push them harder. Once they are over 35 or 36 hot, the grip starts to fall off, so it feels better to start lower cold. The Michelins are more forgiving of a range of pressures, but low 30s has been the sweet spot.
What I’ve found works best is to air up, then go to your favorite stretch of road. Run it repeatedly, lowering pressure a pound or two on each run until you find what you like. That will give you your hot pressure target. Drive home, let the tires cool, measure again. That’s your cold pressure. I like a 1 pound difference cold, since the rears heat up quite a bit more than the front and I end up with 2 to 3 pounds difference once the tires are hot. Also, not a bad way to spend an afternoon .
Good luck!
Thanks for the suggestion. It's funny, I did this all the time at the track, but the idea never even occurred to me here.
The TPMS on my Cayman would always start screaming at me at some point on the drive home from the track on Sunday afternoon as the temp and pressure dropped. The tires were usually 7 or 8 pounds low from regular street pressure at that point.
Without having gone through all the settings available and considering the cost, the chances of changing components now is zippy chance!
It's easy enough to put the car up on the lift to change the settings and there's no shortage of great yet terrible roads to test it on.
Gonna step up from 1F/2R in increments to see if there's a setting that allows me to have something comfortable on a day to day which works for more spirited jaunts. If not, then it takes 5 minutes to change between settings. Just changed to 2F/3R which means I have to go for a drive! Oh noes!!!
06-24-2020, 06:13 PM
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