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      05-06-2019, 07:52 PM   #67
Tommysalami
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The RE71R always wears like that in the middle bar. Mine are doing it now on my E92 with 275s on stock suspension, and the numerous sets of 245s and 255s I had on my miata with full suspension did the same. The middle tread wears at an angle like that then stops wearing. You won't notice a drop in grip. I tuned the miatas suspension using a pyrometer to get optimum temperature distribution across the tread so it's not a symptom of improper alignment or pressure. Just something they all do and is nothing to worry about.
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      05-07-2019, 06:02 AM   #68
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Quote:
Originally Posted by bigjae1976 View Post
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Originally Posted by rhyary View Post
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Originally Posted by bigjae1976 View Post
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Yea, this is weird, but I don't know what Toyo RR like for pressure. I run NT01 at 25 cold, 35 hot and I get very even wear. End up cording the rear tires first, on the inside.
I go 25/26 PSI cold and target is 32 hot. My car is a lot lighter so I shoot for a lower hot pressure.

I used to shoot for 38-40psi on my 330ci to prevent rolling over onto the tire's shoulder in corners. It's a significant compromise and not a good idea to do long term.
Isn't 32psi with a light car the same as 38 with a heavier car?

There is a relationship between weight and pressure.
Yeah but 38 is kinda high even for a heavier car.

I think 32psi is too high for my car. I think 30psi is about right but need to try it first.
Since none of the HPDE drivers here can prove something scientific, all we can do is experiment and report back observations. I won't even call it results.

So, I just mounted new front tires R888R 265/30/19. When I get to the track, 70 miles, and after unpacking, I am setting them on 35psi "warm". Meaning, they are not cold like the door sticker recommend but after being driven on. typically that means when touching the tire it is not cold. Actually, I will measure the temp for the purpose of reporting, and set the pressure to 35.

The passenger front gets most of the workout. So if this gets to over 40psi, I will keep it at 40psi hot.

The point for this is to control wear, not traction. My PS4S have lasted:
1. Open track day last Oct at NYST (wet)
2. Dry day at LRP ( 4 x 25m session)
3. Dry day at LRP ( 4 x 25m session)
4. Wet day at NYST (7 x 15m)
5. Wet day at NYST (7 x 20m)
and they are still good with even wear.

Now note that the last day (5) I did on a semi wet track 1:38.2 on the PS4S which is fast at NYST. My best time on ADO8R in the dry is 1:37.2 and on RR my best time dry is 1:37.3.

So, as you can see, 1:38.2 is not bad in relations to my "observed" times.

And the whole point?
While on the 100 tread, 200 tread and the Slicks I experimented with all kind of tire pressures all lower, The PS4S, being my road tires, were never being below 35psi cold and I don't think that the high psi is that much slower to what they can do on my car and with this driver.

Longevity of tires for people without sponsors is part of the HPDE sport. I don't mind destroying tires for the sake of experimenting, but not as normal part of going to HPDE.

I don't have good data on running 38-40 psi on track tires because I always ran them 30-35 hot (coming off the track) and none have lasted enough to justify the cost.

There is more to factor here like DSC off/on and driving on 3rd vs 4th thru the corners.

I will report what ever I find.....
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      05-07-2019, 08:16 AM   #69
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Quote:
Originally Posted by rhyary View Post
So, I just mounted new front tires R888R 265/30/19. When I get to the track, 70 miles, and after unpacking, I am setting them on 35psi "warm". Meaning, they are not cold like the door sticker recommend but after being driven on. typically that means when touching the tire it is not cold. Actually, I will measure the temp for the purpose of reporting, and set the pressure to 35.
.
The R888R is complete shit. I have a set that's half worn which you can have for free, because otherwise I am throwing them away.


I'm curious about the A052 which seems fast as well as the RivalS 1.5, but after the trauma of trying the R888R I'm sticking to what works and it'll take a lot to get me to switch again.

Last edited by SYT_Shadow; 05-07-2019 at 08:21 AM..
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      05-07-2019, 12:35 PM   #70
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Have you tried chalking the sidewall and experiment with different tire pressure? I don't think low tire pressure is beneficial on the front tires of a heavy and camber challenged car
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      05-07-2019, 04:15 PM   #71
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Quote:
Originally Posted by SYT_Shadow View Post
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Originally Posted by rhyary View Post
So, I just mounted new front tires R888R 265/30/19. When I get to the track, 70 miles, and after unpacking, I am setting them on 35psi "warm". Meaning, they are not cold like the door sticker recommend but after being driven on. typically that means when touching the tire it is not cold. Actually, I will measure the temp for the purpose of reporting, and set the pressure to 35.
.
The R888R is complete shit. I have a set that's half worn which you can have for free, because otherwise I am throwing them away.


I'm curious about the A052 which seems fast as well as the RivalS 1.5, but after the trauma of trying the R888R I'm sticking to what works and it'll take a lot to get me to switch again.
Well, I have two fronts that I am not throwing away before I cord them. Besides, mine are 19" so super fast :-)
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      05-07-2019, 09:00 PM   #72
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Is it worth it to have the RE71's taken off the wheels to switch sides after three events to stretch the life a little longer?
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      05-08-2019, 07:51 AM   #73
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Well, I have two fronts that I am not throwing away before I cord them. Besides, mine are 19" so super fast :-)
ah ok, if yours are 19 I'm sure they will be great hehe. Almost as good as 20s!!!
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      05-08-2019, 07:52 AM   #74
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Is it worth it to have the RE71's taken off the wheels to switch sides after three events to stretch the life a little longer?
I more or less rotate them but don't flip them. Here in the wonderful northeast mounting tires is a nice $150, negating any tire savings
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      05-08-2019, 09:16 AM   #75
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Quote:
Originally Posted by SYT_Shadow View Post
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Originally Posted by Dreamer99 View Post
Is it worth it to have the RE71's taken off the wheels to switch sides after three events to stretch the life a little longer?
I more or less rotate them but don't flip them. Here in the wonderful northeast mounting tires is a nice $150, negating any tire savings
So if the conditions are warm and dry you run the tire backwards? No loss of performance?
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      05-08-2019, 09:42 AM   #76
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So if the conditions are warm and dry you run the tire backwards? No loss of performance?
Yes, unless there is rain there is no difference
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      05-08-2019, 10:02 AM   #77
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Quote:
Originally Posted by SYT_Shadow View Post
The R888R is complete shit. I have a set that's half worn which you can have for free, because otherwise I am throwing them away.


I'm curious about the A052 which seems fast as well as the RivalS 1.5, but after the trauma of trying the R888R I'm sticking to what works and it'll take a lot to get me to switch again.
Local shop uses A050 for time attack and A052 for race.



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      05-08-2019, 10:05 AM   #78
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Quote:
Originally Posted by kyrix1st View Post
Local shop uses A050 for time attack and A052 for race.
b]
I've seen a few at AER this year but still, the experience of spending 1200 on tires only to have to throw them away (R888R) is still very fresh.

When something works well, don't change it. That's my motto
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      05-08-2019, 10:11 AM   #79
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Quote:
Originally Posted by SYT_Shadow View Post
I've seen a few at AER this year but still, the experience of spending 1200 on tires only to have to throw them away (R888R) is still very fresh.

When something works well, don't change it. That's my motto
No one uses R888R except maybe Gymkhana guys, because they wear too fast on track and don't really seem to offer better grip/feel over RE71R.

I will stick with RS4 because they are half the price of 71R and a third of A052 Really like the Bridgestone in the front though.
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      05-08-2019, 10:18 AM   #80
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Quote:
Originally Posted by kyrix1st View Post
No one uses R888R except maybe Gymkhana guys, because they wear too fast on track and don't really seem to offer better grip/feel over RE71R.

I will stick with RS4 because they are half the price of 71R and a third of A052 Really like the Bridgestone in the front though.
In the US the RE71 is dirt cheap, 1050 for a set of 275/35s

RS4/A052 is more expensive
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      05-08-2019, 10:22 AM   #81
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Originally Posted by SYT_Shadow View Post
In the US the RE71 is dirt cheap, 1050 for a set of 275/35s

RS4/A052 is more expensive
I should sue Bridgestone for this discrepancy.

Approximately $1600 for a full set of 71R. $800 for RS4.
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      05-08-2019, 10:23 AM   #82
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I should sue Bridgestone for this discrepancy.

Approximately $1600 for a full set of 71R. $800 for RS4.
incredible.

Similarly, the PSC2 is pretty cheap in Europe but in the US it's really expensive

I think you should sue BFG for not making the R1 and R1S available over there. It's so well suited to the E9X/F8X!!
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      05-08-2019, 11:25 AM   #83
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Quote:
Originally Posted by SYT_Shadow View Post
Quote:
Originally Posted by rhyary View Post
Well, I have two fronts that I am not throwing away before I cord them. Besides, mine are 19" so super fast :-)
ah ok, if yours are 19 I'm sure they will be great hehe. Almost as good as 20s!!!
My 2019 goals are 1:36 at NYST
and breaking 60 seconds at LRP.

If I can do that on the front 265/30/19 R888R, then they are good enough for 2019.
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      05-08-2019, 11:47 AM   #84
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Quote:
Originally Posted by rhyary View Post
My 2019 goals are 1:36 at NYST
and breaking 60 seconds at LRP.

If I can do that on the front 265/30/19 R888R, then they are good enough for 2019.
come to the Glen... an E9X is happiest in the big boy tracks
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      05-08-2019, 01:18 PM   #85
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Quote:
Originally Posted by SYT_Shadow View Post
Quote:
Originally Posted by rhyary View Post
My 2019 goals are 1:36 at NYST
and breaking 60 seconds at LRP.

If I can do that on the front 265/30/19 R888R, then they are good enough for 2019.
come to the Glen... an E9X is happiest in the big boy tracks
2020.
Got to learn in the kiddy pool first.
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      05-08-2019, 01:26 PM   #86
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Quote:
Originally Posted by kyrix1st View Post
No one uses R888R except maybe Gymkhana guys, because they wear too fast on track and don't really seem to offer better grip/feel over RE71R.

I will stick with RS4 because they are half the price of 71R and a third of A052 Really like the Bridgestone in the front though.

RS4 and RE71R are pretty much the same price here in the US.
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      05-08-2019, 01:39 PM   #87
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Originally Posted by rhyary View Post
2020.
Got to learn in the kiddy pool first.
There is truth to that... E9X M3 feels great at higher speed tracks. It's also scary
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      05-08-2019, 02:24 PM   #88
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Quote:
Originally Posted by SYT_Shadow View Post
Quote:
Originally Posted by rhyary View Post
My 2019 goals are 1:36 at NYST
and breaking 60 seconds at LRP.

If I can do that on the front 265/30/19 R888R, then they are good enough for 2019.
come to the Glen... an E9X is happiest in the big boy tracks
No doubt WGI (And VIR and Road Atlanta) are big boy tracks. But LRP is still a pretty quick track. Much higher average speed than COTA for example.
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