11-25-2020, 10:15 AM | #1057 | |
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11-26-2020, 02:48 AM | #1058 |
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Looking to upsize to 265/35-19 front and 285/35-19 rear on 437s for daily driving. Improved overall drive quality is what i’m after since California roads aren’t so great. |
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11-27-2020, 10:27 AM | #1059 | |
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PS4S are amazing tires for both ride and handling IMO. |
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11-27-2020, 02:54 PM | #1060 | |
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12-03-2020, 02:18 AM | #1061 |
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Perhaps I overlooked it while searching this thread and others, but is anyone running PS4S's with upgrade turbos?
If so, how do they hold up from the standpoint of straight line traction when you reach power levels around 600 - 700hp?
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12-04-2020, 04:17 PM | #1062 | |
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I'm unsure of which direction to go now since I'm at 3/32nd and really am looking for the best tires. I may just get star-spec PSS again based on your feedback.
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12-06-2020, 01:04 PM | #1063 | |
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12-06-2020, 03:48 PM | #1064 | ||
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02-24-2021, 02:50 AM | #1065 | |
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I'm facing issues on the reverse config: new PS4S on the fronts, existing PSS on the rears. On straight and slightly curvy roads it's all good, but when driving around the more curvy backroads that I frequent the car just seems less planted, the turn-in isn't as sharp and the car seems to sway (front-back) where it used to point and just go in that direction. It's not just "responsiveness" - I have significantly less confidence when taking corners at speed now, and it's a real bummer. I'm wondering if just switching the rears to PS4Ses will solve this issue, or if I should sell the front PS4Ses and switch back to PSSes instead. Would appreciate advice from those of us here who've faced similar issues and possibly tried various permutations. |
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02-24-2021, 08:22 PM | #1066 | |
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02-25-2021, 06:44 PM | #1067 | |
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02-25-2021, 10:10 PM | #1069 |
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I upped the front pressure to 38 psi (hot) and the car still doesn't feel planted the way it used to around the bends
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03-04-2021, 10:36 AM | #1070 | |
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Try adding camber plates to the front and run more negative camber in the front and dial out negative camber in the rear (-3.0 Front -2.0 rear) or something similar like that. This would help reduce understeer and increase mid cornering grip to feel more "planted".
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03-04-2021, 07:34 PM | #1071 |
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Hi - I'm considering replacing my RE-11s with identical spec PS4S:
19x9.5 ET20 265/35/19 19x11 ET40 305/30/19 That said, the rear tread width seems to be 0.4" wider. I'm lowered on kw ddc's and rears aren't currently rubbing and I'd like to keep it that way! Should I risk it??
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03-05-2021, 06:22 PM | #1072 | |
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Indeed, thanks for this.
I think it's mostly a case of me not having a good handle on the relevant semantics pertaining to driving. Need me some M school. I upped the tire pressure after reading some of the threads on here regarding steering response issues after switching to the PS4S, thinking that it would somehow solve the squirminess + rolling that I was feeling, and it's that squirminess + rolling that I was referring to when I said the car didn't feel planted. On the PSS, the car didn't feel this way. Also, the PSS were a significant upgrade in the "planted-ness" of the car when switching to them from the CSC5Ps. I then read on rennlist about porsche owners facing similar issues with the PS4S, and the prevailing solution was to lower the tire pressure, which increases grip, so I'm currently experimenting with 33 psi cold all around. Haven't had the chance to push the car around the same bends, but once I decided if I'm keeping the PS4S I'll probably get an alignment done and play with the camber settings as you pointed out. Quote:
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03-05-2021, 06:28 PM | #1073 | |
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Car doesn't come with camber adjustment in the front, you'll need camber plates.
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03-05-2021, 08:20 PM | #1074 |
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03-06-2021, 02:11 AM | #1075 |
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No...2 PSI lower while cold shouldn’t set off TPMS. It should be around 27 PSI when it would set off. I’ve tried 30 PSI for the comfort and grip and it’s marginally better.
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03-06-2021, 09:53 AM | #1076 | |
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03-07-2021, 02:10 AM | #1077 | |
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03-07-2021, 07:32 AM | #1078 | ||
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