BMW M3 Forum (E90 E92)

BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read


Go Back   M3Post - BMW M3 Forum > E90/E92 M3 Technical Topics > Track / Autocross / Dragstrip / Driving Techniques
 
INDustry distribution
Post Reply
 
Thread Tools Search this Thread
      12-04-2018, 08:54 PM   #23
roastbeef
Major General
roastbeef's Avatar
United_States
5894
Rep
9,727
Posts

Drives: E92 M3
Join Date: Nov 2010
Location: Orange County, CA

iTrader: (2)

the maestro redpriest doing the dance.
__________________
Instagram; @roastbeefmike
Appreciate 1
italyix107.00

      12-05-2018, 09:09 AM   #24
kyrix1st
Major
kyrix1st's Avatar
Japan
658
Rep
1,027
Posts

Drives: E36 M3 Euro, E36/7, E92 M3
Join Date: Sep 2014
Location: Kyoto

iTrader: (0)

Garage List
2004 BMW Z4  [0.00]
Quote:
Originally Posted by roastbeef View Post
the maestro redpriest doing the dance.
That E36 is QUICK.
__________________
Pass me if you can.
Appreciate 0
      12-05-2018, 09:52 AM   #25
Richbot
Brigadier General
1760
Rep
4,888
Posts

Drives: Jerez Black E90
Join Date: Sep 2007
Location: STL

iTrader: (5)

Braking too hard + understeer = overdriving the brake zone then overdriving the corner, not really braking causing it, more like testosterone + LOFT
__________________
Appreciate 2
m13s22.50
gmx71.00

      12-05-2018, 10:00 AM   #26
roastbeef
Major General
roastbeef's Avatar
United_States
5894
Rep
9,727
Posts

Drives: E92 M3
Join Date: Nov 2010
Location: Orange County, CA

iTrader: (2)

Quote:
Originally Posted by kyrix1st View Post
Quote:
Originally Posted by roastbeef View Post
the maestro redpriest doing the dance.
That E36 is QUICK.
E46. He is a quick driver with a ton of experience.
__________________
Instagram; @roastbeefmike
Appreciate 0
      12-05-2018, 12:43 PM   #27
redpriest
Colonel
redpriest's Avatar
United_States
1367
Rep
2,202
Posts

Drives: 2017 M4 / 2011 M3
Join Date: Apr 2014
Location: Bay Area, CA

iTrader: (0)

Garage List
2006 BMW M3  [0.00]
2017 BMW M4  [5.00]
2011 BMW M3  [5.00]
Quote:
Originally Posted by roastbeef View Post
Quote:
Originally Posted by kyrix1st View Post
Quote:
Originally Posted by roastbeef View Post
the maestro redpriest doing the dance.
That E36 is QUICK.
E46. He is a quick driver with a ton of experience.
He's probably talking about the e36 m3 sedan in front of me. Yeah he is. It's not even a motor swap - his car has had a lot of weight reduction (I think his car weighs < 2700 lbs) and he'll actually pull on me on a straight.
__________________
'06 BMW M3 ZCP 6MT | JRZ RS Pro + Hyperco 650/750 | Epic Tune | Brembo 355mm BBK | too many to list
'11 BMW M3 ZCP DCT | Akra Evolution | MS Intake/pulley | JRZ RS Pro + Hyperco 700/800 | BPM Stage2/DCT tune | Dinan sway bar + monoballs | AP Racing Radi-CAL BBK by Essex | 265/35-18 Maxxis RC-1 on APEX EC-7s
'17 BMW M4 ZCP 6MT - Individual Tanzanite Blue + Opal White Leather
instagram.com/titomanlio
Appreciate 2
kyrix1st658.00
roastbeef5894.00

      12-05-2018, 12:48 PM   #28
redpriest
Colonel
redpriest's Avatar
United_States
1367
Rep
2,202
Posts

Drives: 2017 M4 / 2011 M3
Join Date: Apr 2014
Location: Bay Area, CA

iTrader: (0)

Garage List
2006 BMW M3  [0.00]
2017 BMW M4  [5.00]
2011 BMW M3  [5.00]
Quote:
Originally Posted by italyix View Post
Just got back from running Streets of Willows with OnGrid this past Sunday and was experiencing bad under steer, and am trying to understand why.

My set up is:
Falken Azenis
Front 285
Rears 315

Brembo 380mm bbk front and rear
Endless pads

US MDM

Camber is 3.8 front and 3.2 rear

Running a front GTS style splitter also

Best time was 1:30, my friend ran a 1:28 with my car as well

Any thoughts as to what is causing the under steer? I was also over heating the front brakes, I think the mdm was kicking in waaaay too early and causing issues

I should also add that while the rear tires were being used to the fullest, as the wear marks were spot on, the fronts were scrubbing and not hitting their wear marks. Too much camber?
You'll find I think, that's just the nature of Streets. Having just come back from there for the second time ever, was experiencing understeer in quite a few corners, especially turn 8.

It doesn't seem to be a very good grip surface and it's very bumpy making it a challenge for your suspension.

I did 1:28 once in my e92 when I was relatively new to driving it - maybe 6 or so track days of experience. That lap with MDM is here:

__________________
'06 BMW M3 ZCP 6MT | JRZ RS Pro + Hyperco 650/750 | Epic Tune | Brembo 355mm BBK | too many to list
'11 BMW M3 ZCP DCT | Akra Evolution | MS Intake/pulley | JRZ RS Pro + Hyperco 700/800 | BPM Stage2/DCT tune | Dinan sway bar + monoballs | AP Racing Radi-CAL BBK by Essex | 265/35-18 Maxxis RC-1 on APEX EC-7s
'17 BMW M4 ZCP 6MT - Individual Tanzanite Blue + Opal White Leather
instagram.com/titomanlio
Appreciate 1
roastbeef5894.00

      12-06-2018, 06:42 AM   #29
kyrix1st
Major
kyrix1st's Avatar
Japan
658
Rep
1,027
Posts

Drives: E36 M3 Euro, E36/7, E92 M3
Join Date: Sep 2014
Location: Kyoto

iTrader: (0)

Garage List
2004 BMW Z4  [0.00]
Quote:
Originally Posted by redpriest View Post
He's probably talking about the e36 m3 sedan in front of me. Yeah he is. It's not even a motor swap - his car has had a lot of weight reduction (I think his car weighs < 2700 lbs) and he'll actually pull on me on a straight.
Don't worry, you are plenty quick. Were your tires old/worn? You seem to lose a lot of rear grip through S corners..
__________________
Pass me if you can.
Appreciate 0
      12-07-2018, 04:09 PM   #30
1MOREMOD
2018 track days - 0 ridge 1:52:24 pacific 1:33:30
1MOREMOD's Avatar
United_States
9018
Rep
22,061
Posts

Drives: Race car->
Join Date: Mar 2009
Location: check your mirrors

iTrader: (5)

You go too fast when you turn
Appreciate 1
      12-08-2018, 06:21 PM   #31
redpriest
Colonel
redpriest's Avatar
United_States
1367
Rep
2,202
Posts

Drives: 2017 M4 / 2011 M3
Join Date: Apr 2014
Location: Bay Area, CA

iTrader: (0)

Garage List
2006 BMW M3  [0.00]
2017 BMW M4  [5.00]
2011 BMW M3  [5.00]
Quote:
Originally Posted by kyrix1st View Post
Quote:
Originally Posted by redpriest View Post
He's probably talking about the e36 m3 sedan in front of me. Yeah he is. It's not even a motor swap - his car has had a lot of weight reduction (I think his car weighs < 2700 lbs) and he'll actually pull on me on a straight.
Don't worry, you are plenty quick. Were your tires old/worn? You seem to lose a lot of rear grip through S corners..
RE71R tires that had 2 track days at chuckwalla previously. I go through these tires like candy - I get 3 or 4 track days out of them if I'm lucky. The fronts are completely torn up - no tread pattern left on the outer half.
__________________
'06 BMW M3 ZCP 6MT | JRZ RS Pro + Hyperco 650/750 | Epic Tune | Brembo 355mm BBK | too many to list
'11 BMW M3 ZCP DCT | Akra Evolution | MS Intake/pulley | JRZ RS Pro + Hyperco 700/800 | BPM Stage2/DCT tune | Dinan sway bar + monoballs | AP Racing Radi-CAL BBK by Essex | 265/35-18 Maxxis RC-1 on APEX EC-7s
'17 BMW M4 ZCP 6MT - Individual Tanzanite Blue + Opal White Leather
instagram.com/titomanlio
Appreciate 0
      12-09-2018, 06:04 PM   #32
M3 Number 86
Major General
2957
Rep
6,085
Posts

Drives: black m3
Join Date: Mar 2015
Location: pasadena

iTrader: (1)

Quote:
Originally Posted by roastbeef View Post
the maestro redpriest doing the dance.
You should've seen him try to do skidpad with worm Pirelli scrubs in the back
__________________
Appreciate 1
redpriest1366.50

      12-09-2018, 06:05 PM   #33
redpriest
Colonel
redpriest's Avatar
United_States
1367
Rep
2,202
Posts

Drives: 2017 M4 / 2011 M3
Join Date: Apr 2014
Location: Bay Area, CA

iTrader: (0)

Garage List
2006 BMW M3  [0.00]
2017 BMW M4  [5.00]
2011 BMW M3  [5.00]
Quote:
Originally Posted by M3 Number 86 View Post
Quote:
Originally Posted by roastbeef View Post
the maestro redpriest doing the dance.
You should've seen him try to do skidpad with worm Pirelli scrubs in the back
Nobody wants to see an idiot driving around in circles lol
__________________
'06 BMW M3 ZCP 6MT | JRZ RS Pro + Hyperco 650/750 | Epic Tune | Brembo 355mm BBK | too many to list
'11 BMW M3 ZCP DCT | Akra Evolution | MS Intake/pulley | JRZ RS Pro + Hyperco 700/800 | BPM Stage2/DCT tune | Dinan sway bar + monoballs | AP Racing Radi-CAL BBK by Essex | 265/35-18 Maxxis RC-1 on APEX EC-7s
'17 BMW M4 ZCP 6MT - Individual Tanzanite Blue + Opal White Leather
instagram.com/titomanlio
Appreciate 0
      12-10-2018, 02:39 AM   #34
M3 Number 86
Major General
2957
Rep
6,085
Posts

Drives: black m3
Join Date: Mar 2015
Location: pasadena

iTrader: (1)

Quote:
Originally Posted by redpriest View Post
Quote:
Originally Posted by M3 Number 86 View Post
Quote:
Originally Posted by roastbeef View Post
the maestro redpriest doing the dance.
You should've seen him try to do skidpad with worm Pirelli scrubs in the back
Nobody wants to see an idiot driving around in circles lol
__________________
Appreciate 0
      12-18-2018, 05:15 AM   #35
scrammer
Captain
scrammer's Avatar
Canada
345
Rep
684
Posts

Drives: 2011 M3 ZCP / 2015 X4 35i
Join Date: Aug 2013
Location: BC - Canada

iTrader: (0)

Many drivers think it's full throttle then full brakes but "Trail braking" involves easing off the brake pedal so as not to let the car understeer, while still slowing it enough to make the corner.

"When approaching a corner, it's common practice to give full braking in a straight line. Trail braking begins when turning into the corner while at the same time easing off the brakes, but still applying enough pressure to make sure you don't fly off the course. With the right pressure applied, the car will balance out, and you'll make it through the turn. Add too much or too little, and the car will begin to push or understeer."
__________________

Current ///M: E92 M3 ZCP 'CDN LRP' - G01 X3 M40i
Past ///M's: E85 Z4M-R ... E92 M3 ZCP Frozen ... E90 M3 ... E46 M3 Cab ... E46 M3 ZCP ... E46 M3
Appreciate 1
italyix107.00

      12-19-2018, 04:43 PM   #36
z3papa
Captain
United_States
177
Rep
955
Posts

Drives: 11 E92 M3 ZCP, 07 335i
Join Date: Oct 2009
Location: Bloomington IL

iTrader: (2)

Quote:
Originally Posted by scrammer View Post
Many drivers think it's full throttle then full brakes but "Trail braking" involves easing off the brake pedal so as not to let the car understeer, while still slowing it enough to make the corner.

"When approaching a corner, it's common practice to give full braking in a straight line. Trail braking begins when turning into the corner while at the same time easing off the brakes, but still applying enough pressure to make sure you don't fly off the course. With the right pressure applied, the car will balance out, and you'll make it through the turn. Add too much or too little, and the car will begin to push or understeer."
I use the slang reference for this as "sponging off the brakes". It essentially allows the car to continue to take a set.
__________________
Sold 2011.5 E92 M3 ZCP.
Appreciate 2
scrammer344.50

Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 03:39 PM.




m3post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, 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