THE LARGEST BMW 2-SERIES FORUM ON THE PLANET
2Addicts
2Addicts
BMW Garage BMW Meets Register Today's Posts
2Addicts | BMW 2-Series forum Technical Topics Tracking / Autocrossing Bridgestone RE71r 235/45 17 for Auto X

Post Reply
 
Thread Tools Search this Thread
      07-27-2020, 06:15 PM   #89
Kayleighpppp
Registered
0
Rep
1
Posts

Drives: BMW Z4 Gt3
Join Date: Jul 2020
Location: Brockville Ontario

iTrader: (0)

Hi Dylan

Hey Dylan I hope I did not upset you so much since you haven’t been online since 6pm there Dylan How’s things with you and how’s the racing going with you Iam very sorry to have sent you this message there Dylan please don’t avoid this message I miss talking to you I miss hearing your voice and also miss seeing you this is the only way I can talk to you I hope you don’t get me into deep trouble Dylan Your way to kind of a person to talk to Iam really afraid and extremely scared and extremely sad about this message


QUOTE=rhop101;25230785]Yea think I’m just gonna go 225/255 just to play it safe. Mainly using the car on road with maybe 2-3 autocrosses a year at most, so we’ll see what I think about the 255 on the back maybe next time I’ll get the 235 if I think it’s too pushy.

I see what you mean about the flipping. If I was autocrossing more that would definitely be a reason to go with the RE71[/QUOTE]

Last edited by Kayleighpppp; 07-27-2020 at 09:45 PM..
Appreciate 0
      07-27-2020, 07:19 PM   #90
TajoMan
Lieutenant
TajoMan's Avatar
174
Rep
400
Posts

Drives: M240 xdrive, X3M40i
Join Date: Mar 2017
Location: Chicago, IL

iTrader: (0)

Quote:
Originally Posted by Dylan86 View Post
Are you still starting with the same cold pressures? I was running mine at 27psi cold to net 32psi hot and they were perfect coming off the track after 15 minutes in the blistering summer heat.
I was running 34f/31r hot (started with 35/32). Can't tell the cold pressure since I kept lowering it each lap.
I think I may try even lower pressure since the 'triangle' is still untouched .
(1~2 mm away from touching it)
Appreciate 1
Dylan861330.00
      07-30-2020, 06:16 PM   #91
Dylan86
Colonel
Dylan86's Avatar
Canada
1330
Rep
2,214
Posts

Drives: F15d msport, F22 m235i
Join Date: Jan 2016
Location: GTA

iTrader: (0)

Quote:
Originally Posted by TajoMan View Post
I was running 34f/31r hot (started with 35/32). Can't tell the cold pressure since I kept lowering it each lap.
I think I may try even lower pressure since the 'triangle' is still untouched .
(1~2 mm away from touching it)
Yea it's crucial to set cold when you're actually "cold" lol, it's hard to dial back from the first heat cycle once it happens. I'd try 27F 29R next time, see where you come off at...

Every track will vary, too. TMP the left front gets hotter than everything else, so next time I'll go 1-2 psi lower on that corner alone.
__________________
Appreciate 1
TajoMan174.00
      07-31-2020, 12:27 PM   #92
TajoMan
Lieutenant
TajoMan's Avatar
174
Rep
400
Posts

Drives: M240 xdrive, X3M40i
Join Date: Mar 2017
Location: Chicago, IL

iTrader: (0)



Comparing last 2 track sprint events.
I think I got little better on smooth steering input.
Appreciate 0
      07-31-2020, 04:37 PM   #93
dradernh
Brigadier General
dradernh's Avatar
4348
Rep
3,493
Posts

Drives: 2017 M240i
Join Date: Aug 2013
Location: SW Ohio

iTrader: (0)

Quote:
Originally Posted by TajoMan View Post
Comparing last 2 track sprint events.
I think I got little better on smooth steering input.
You look like you're sitting pretty far back from the wheel – could be the video, as they can be deceptive. Does your wrist or lower forearm sit on top of the steering wheel when your shoulders are against the back of the chair?

FWIW, while necessary when starting out, and never a bad thing, smooth hands can be overrated. Witness the technique employed starting at 1:19 in the video below by 60-time IMSA winner and Turner Motorsport pro driver Bill Auberlen as he keeps his car at the edge of traction. Auberlen is now tied with sports car racing star Scott Pruett for most IMSA wins ever.

Also, listen to what he's doing with the throttle from 1:26-1:30. You'd think the car would be moving all over the place, but in that turn (and in some turns on other tracks) it keeps the car on the line perfectly. It's the fastest way through the turn when driving that line.

__________________
2017 M240i: 23.8K, 28.9 mpg, MT, Sunroof Delete, 3,432#, EB, Leather, Driving Assistance Package, Heated Front Seats | Sold: E12 530i, E24 M635CSi, E39 520i, E30 325is, E36 M3 (2)
TC Kline Coilovers; H&R Front Bar; Wavetrac; Al Subframe Bushings; 18X9/9½ ARC-8s; 255/35-18 PS4S (4); Dinan Elite V2 & CAI; MPerf Orange BBK; Schroth Quick Fit Pro;
GTechniq Crystal Serum Ultra Ceramic; Suntek PPF

Last edited by dradernh; 07-31-2020 at 05:08 PM..
Appreciate 1
TajoMan174.00
      07-31-2020, 05:08 PM   #94
TajoMan
Lieutenant
TajoMan's Avatar
174
Rep
400
Posts

Drives: M240 xdrive, X3M40i
Join Date: Mar 2017
Location: Chicago, IL

iTrader: (0)

Quote:
Originally Posted by dradernh View Post
You look like you're sitting pretty far back from the wheel – could be the video, as they can be deceptive. Does your wrist or lower forearm sit on top of the steering wheel when your shoulders are against the back of the chair?
It has to be the camera. My wrists sit on top of the steering without my arms stretched all the way and shoulders against the seatback.
The seat is moved forward as much as possible.
My knees are almost touching the underdash and my helmet is touching the roof.
(I'm 6'3" with relatively long torso.)
This car is basically the smallest car that I can fit in. lol

I think it's just my bad habit about the steering input. I move it too much, too often even when I don't need to.
Appreciate 0
      07-31-2020, 05:18 PM   #95
dradernh
Brigadier General
dradernh's Avatar
4348
Rep
3,493
Posts

Drives: 2017 M240i
Join Date: Aug 2013
Location: SW Ohio

iTrader: (0)

Quote:
Originally Posted by TajoMan View Post
It has to be the camera. My wrists sit on top of the steering without my arms stretched all the way and shoulders against the seatback.
The seat is moved forward as much as possible.
My knees are almost touching the underdash and my helmet is touching the roof.
(I'm 6'3" with relatively long torso.)
This car is basically the smallest car that I can fit in. lol

I think it's just my bad habit about the steering input. I move it too much, too often even when I don't need to.
Glad you found a small car that still fits you. Looks like you're having fun in it, too!

With enough seat time, the steering generally becomes what it needs to be in each turn, especially as your increased confidence enables you to begin going faster.
__________________
2017 M240i: 23.8K, 28.9 mpg, MT, Sunroof Delete, 3,432#, EB, Leather, Driving Assistance Package, Heated Front Seats | Sold: E12 530i, E24 M635CSi, E39 520i, E30 325is, E36 M3 (2)
TC Kline Coilovers; H&R Front Bar; Wavetrac; Al Subframe Bushings; 18X9/9½ ARC-8s; 255/35-18 PS4S (4); Dinan Elite V2 & CAI; MPerf Orange BBK; Schroth Quick Fit Pro;
GTechniq Crystal Serum Ultra Ceramic; Suntek PPF
Appreciate 0
      08-23-2020, 08:12 PM   #96
TajoMan
Lieutenant
TajoMan's Avatar
174
Rep
400
Posts

Drives: M240 xdrive, X3M40i
Join Date: Mar 2017
Location: Chicago, IL

iTrader: (0)

Last TrackSprint of this year.
I managed to cut 2 sec from my previous best time.
Still see lots of places to improve.




Comparison to the previous best run. I was faster pretty much everywhere.

Appreciate 0
      09-20-2020, 11:01 AM   #97
TajoMan
Lieutenant
TajoMan's Avatar
174
Rep
400
Posts

Drives: M240 xdrive, X3M40i
Join Date: Mar 2017
Location: Chicago, IL

iTrader: (0)

Mini track day

Attended mini (only 2 sessions) track day at Autobahn CC south








It was ton of fun chasing/leading with a friend (ZL1).

Brake gave up after 5~6 laps in 2nd session. Pedal went soft and went waaay in. lol

Obviously, stock brake fluid is not up to the track event.
(Had ATE 706202 Original TYP 200 last year and it was never this bad)

I was surprised how fast the Veloster N was! (I'm sure the driver was also faster)
It snakes through the turns super quick.
My car feels like a boat.
Appreciate 0
      09-20-2020, 04:16 PM   #98
dradernh
Brigadier General
dradernh's Avatar
4348
Rep
3,493
Posts

Drives: 2017 M240i
Join Date: Aug 2013
Location: SW Ohio

iTrader: (0)

Quote:
Originally Posted by TajoMan View Post
My car feels like a boat.
Yeah, that's been mentioned a couple of times before here. Unfortunately, there's not much to be done about it if you're going to continue using it on the street.

The more open the course and the wider the track's pavement the less a 6-cylinder 2 Series will feel like what I think of it as being, and that's a GT car.

Have you considered going up to Road America? That's a track that should enable you to begin exploring the limits of your car in a way that the tighter tracks won't allow.
__________________
2017 M240i: 23.8K, 28.9 mpg, MT, Sunroof Delete, 3,432#, EB, Leather, Driving Assistance Package, Heated Front Seats | Sold: E12 530i, E24 M635CSi, E39 520i, E30 325is, E36 M3 (2)
TC Kline Coilovers; H&R Front Bar; Wavetrac; Al Subframe Bushings; 18X9/9½ ARC-8s; 255/35-18 PS4S (4); Dinan Elite V2 & CAI; MPerf Orange BBK; Schroth Quick Fit Pro;
GTechniq Crystal Serum Ultra Ceramic; Suntek PPF
Appreciate 0
      09-20-2020, 06:08 PM   #99
TajoMan
Lieutenant
TajoMan's Avatar
174
Rep
400
Posts

Drives: M240 xdrive, X3M40i
Join Date: Mar 2017
Location: Chicago, IL

iTrader: (0)

Quote:
Originally Posted by dradernh View Post
Have you considered going up to Road America? That's a track that should enable you to begin exploring the limits of your car in a way that the tighter tracks won't allow.
For sure. I will go there sometime.
Appreciate 0
      06-21-2021, 09:27 PM   #100
TajoMan
Lieutenant
TajoMan's Avatar
174
Rep
400
Posts

Drives: M240 xdrive, X3M40i
Join Date: Mar 2017
Location: Chicago, IL

iTrader: (0)

RS4

Track Sprint 1 and 2

It was wet for the Track Sprint 1.
RS4 had no grip whatsoever in wet and relatively cold condition.
(I spun at the 1st turn in 1st run. lol)



2nd event was much better for the tire.
Still much less grip and lots of understeer through turn 4 compared to the RE71r.


This tire may not have ultimate grip level but it does last forever.
I don't see much wear on the tire yet.....(good and bad. I want to try different tire now but it is less than 25% worn...)
Appreciate 0
Post Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 12:59 AM.




2addicts
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST