12-21-2019, 11:49 AM | #23 |
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I have been very happy wit PS4S (255f/275r) on stock wheels for daily use. I haven't run autocross or track on them. They do not tramline on uneven roads nearly as badly as RE11, RE71R or Rival S.
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12-21-2019, 07:15 PM | #24 |
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I'm on my fourth set of PS4s on original rims. Suspension has camber plates, Dinan components and race springs. You need to find a new tire 'expert' to get advice from. After 140,000 miles with smiles I can confirm the sizes work great.
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The 1 series M is the most badass, coolest, sickest BMW to debut since the 1988 M3. The E30 M3 finally has a successor. Please welcome the stupidly fast, wickedly tempered, awkwardly named, possibly perfect little son of a benchmark - Automobile Magazine, August 2011
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01-02-2020, 05:57 AM | #25 | |
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These new ps4s are not Bmw *star rated and I am concerned that the car may understeer similar to a set of pss non-star rated that I mounted to the car. I want to maintain the car’s stock handling as best as possible. If you or others can comment on the retention of the oem handling that would be great. How is the sidewall stiffness? |
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01-02-2020, 06:01 AM | #26 | |
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How are the handling characteristics, specifically any understeer? The oem tire and suspension is set up neutral and set to oversteer at the limit (as everyone knows). |
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01-02-2020, 04:35 PM | #27 | ||
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The tires seem to fit a bit "larger" than the PS2s so if anything, they give a little bit more dampening/comfort to the ride. |
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01-02-2020, 05:03 PM | #28 | ||
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I'm currently using a square wheel and tire set for the track which is very neutral at the limit. To achieve this, I have -2.5° of camber in the front and-1.8° of camber in the rear. With my stock wheels on the car, which currently have the PS4S on them, there is still a tendency to understeer very slightly at the limit, which is much safer for every day use.
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1M track toy mods: BMS chargepipe, BMS OCC, ADE FMIC, ADE motor mounts, MadDad/Lightweight Ti exhaust, ADE custom oil thermostat/cooler, custom MHD tune, F10 550i clutch, Ohlins R+T, Vorschlag camber plates, M3 'vert FSB with Turner endlinks, Stoptech Trophy BBK.
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01-02-2020, 08:14 PM | #29 | |
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I would rather not have to add camber plates... is there another tire people have been using to maintain the stock handling? |
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01-02-2020, 08:16 PM | #30 | |
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The rest of your most is however fairly clear. If I want to use the ps4s I have to dial in -2.5 camber to the front. Is there another tire available on the market that will perform like stock? |
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01-02-2020, 08:21 PM | #31 | ||
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1M track toy mods: BMS chargepipe, BMS OCC, ADE FMIC, ADE motor mounts, MadDad/Lightweight Ti exhaust, ADE custom oil thermostat/cooler, custom MHD tune, F10 550i clutch, Ohlins R+T, Vorschlag camber plates, M3 'vert FSB with Turner endlinks, Stoptech Trophy BBK.
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01-02-2020, 08:38 PM | #32 | |
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This car will understeer if the driver sharply turns (ie. panic turn in or is not smooth with the steering) or if the surface is truly loose or if the tire pressures are out. I found that if you are smooth and direct there is otherwise no understeer. If you are regularly understeer this car then you: 1) are over driving past the limit of the front tires (ie. you need r-compound) 2) are not smooth 3) are on loose surfaces 4) your race track is really really tight but even then I am not certain it will understeer My track experience is Mosport, Mosport dtc and Calabogie That said, I still do respect your comments regarding the front camber. |
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01-02-2020, 09:14 PM | #33 | ||
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Having tracked my car as well as several other M and BMW cars (although I am not a track junkie like many here), I find the 1M to be neutral and you can quite easily provoke either over or understeer based on the balance in the car - this is what makes is so fun even at street speeds. On the track this can make it be hard to be smooth. For example, turn 1 at VIR is a constant understeer to oversteer and back to understeer then oversteer battle in the 1M. The longer wheel base of say an M4 makes this corner much smoother and faster. |
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01-03-2020, 12:56 PM | #34 | |||
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Last edited by nachob; 01-05-2020 at 08:46 PM.. |
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01-03-2020, 01:57 PM | #35 |
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This is an interesting discussion. The inherent understeer dialed into the chassis of all modern BMWs is a well-established fact. It was one of the reasons why Randy Post did not like the 1M. There are numerous threads on this board dedicated to the work the people of done to dial out the understeer, which generally requires going to a square set up or changing parts to allow more aggressive camber in the front. Without doing at least one of those two things, there is very little that that can be done to change the balance of the car.
I agree that there are different styles of driving. There are also tricks that can be used to eliminate understeer such as trail breaking on corner entry, and using throttle to induce power oversteer midcorner and on corner exit, but that usually is not as fast as having a car that has balanced handling at the limit midcorner. Some of the comments above illustrate the tricks that people are trying to use to get the car to rotate through a corner, but a short wheelbase tail happy car is never going to be a fast around the corner when you're trying to induce rotation by removing traction from the rear wheels through wheel spin. My set up has prompt turn in, four wheel slide through the middle half of every turn through the Apex, and a full throttle push to the track out on most corners, unless there are unusual elements present which you would always have to adjust for.
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01-05-2020, 11:55 AM | #36 |
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What tire pressures is everyone running on the ps4 tire?
I ran the ps2 at both 33f/34R and 38f/ 39 R with excellent results. Looks like the consensus on this thread is that the ps4s are an acceptable replacement for the ps2 tires and enhance the drive without inducing other issues. As an aside I had a set of pss (no star rated tires) on the car for a season and the understeer was horrendous because the side wall stiffness of the non-star rated tire was soooo soft compared to a star rated version of the same tire. Speaking of sidewalls... the ps2 tire side walls are really stiff. Are the ps4s the same stiffness when performing the finger poke test ???? |
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01-10-2020, 06:42 PM | #37 | |
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01-24-2020, 06:42 PM | #38 |
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Anyone else running these tires with a positive experience compared to the stock ps2’s ?
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01-29-2020, 05:54 PM | #39 |
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I went through several other tires on my stock wheels before the PS4s, so direct comparison to the PS2 is difficult.
I used RE11 in 255/275 stagger on the stock wheels. They had much most grip, but felt dead in the center compared to PS2, and got LOUD as they wore. I have used 2 sets of RE71r on the stock wheels, but with significantly altered alignment (-2.7 camber in front) and they are loud. Now that I have dedicated track wheels, I put the PS4s on the OEM wheels and can say that are much better for daily driving. Response is crisp, but they are more comfortable and quiet. Grip is excellent.
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1M track toy mods: BMS chargepipe, BMS OCC, ADE FMIC, ADE motor mounts, MadDad/Lightweight Ti exhaust, ADE custom oil thermostat/cooler, custom MHD tune, F10 550i clutch, Ohlins R+T, Vorschlag camber plates, M3 'vert FSB with Turner endlinks, Stoptech Trophy BBK.
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02-02-2020, 01:10 PM | #40 | |
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MHD tuning has a linear throttle option, which is a step in the right direction for the E82. |
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02-03-2020, 10:53 PM | #41 |
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I am enjoying this thread. Autox for me is, DSC off, M sport on, then plenty of throttle modulation.
I have run stock PSS 245/265 and now have RE71R 255/275. Even with revised fenders there is some rubbing on the front since they run wide and have square sidewalls. I have -2.0 camber or -3.0 for lapping days. I ran two autox and one shortened lapping day last year and saw plenty of wear on the outer edge of the PSS. They outer edge will not stand up long to tracking. The RE71R are very loud and like to track on ruts in the highway but the grip is immense. I ran them for years on my DC2R so I was prepared. |
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08-03-2020, 03:33 PM | #42 |
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Refreshing this thread. Due to the covid lock downs and general lack of daily trips I did not need to change my tires this year.
Still looking to replace with ps4s Looking for those who have made the switch to chime in with their review, specifically how does the car handle at the limit? Seems well established these are excellent daily tires. Would like to know how the understeer feel is, if any ? Do they pro,it more understeer than the ps2? |
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02-08-2021, 07:24 PM | #43 |
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Anyone have any “insider” info if Michelin will be releasing a BMW * rated version of the oem tire seizes In the ps4s for this spring?
245/35/19 Bmw * 265/45/19 Bmw * |
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02-09-2021, 11:55 AM | #44 |
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