E90Post
 


The Tire Rack
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Tracking, Autocrossing, Dragstrip, Driving Techniques > HP Autowerks podium finish at first Redline Time Attack



Reply
 
Thread Tools Search this Thread
      12-01-2009, 02:47 PM   #23
vwong
Lieutenant
vwong's Avatar
United_States
31
Rep
595
Posts

Drives: All Euro
Join Date: Jul 2007
Location: SoCal

iTrader: (3)

Jeff, congrats to your 3rd place finish. That was definitely a nice drift out of the chicane. On Saturday while giving ride to a friend of mine, I pretty much drifted the entire 2nd half of the double apex turn.
__________________
2010 Audi S4 6MT
2009 BMW 335i Coupe 6MT
YouTube Channel
Appreciate 0
      12-02-2009, 01:27 AM   #24
J Tyler
My ride: bimmergirl84
United_States
23
Rep
302
Posts

Drives: For free.
Join Date: Jun 2008
Location: SloCal

iTrader: (0)

Quote:
Originally Posted by vwong View Post
Jeff, congrats to your 3rd place finish. That was definitely a nice drift out of the chicane. On Saturday while giving ride to a friend of mine, I pretty much drifted the entire 2nd half of the double apex turn.
Haha nice!

Harold's car will do that whole corner sideways in 4th gear

(I assume you mean the fast double-apex left coming onto the front straight)
Appreciate 0
      12-02-2009, 02:04 AM   #25
vwong
Lieutenant
vwong's Avatar
United_States
31
Rep
595
Posts

Drives: All Euro
Join Date: Jul 2007
Location: SoCal

iTrader: (3)

Quote:
Originally Posted by J Tyler View Post
Haha nice!

Harold's car will do that whole corner sideways in 4th gear

(I assume you mean the fast double-apex left coming onto the front straight)
No, I meant the first sort of "U" turn in the in-field section. A lot of people took a line where they would run wide and miss the 1st apex, then late apex the 2nd. But I found that taking it as a double apex was quicker. Just curious, which line did you take for that turn?
__________________
2010 Audi S4 6MT
2009 BMW 335i Coupe 6MT
YouTube Channel
Appreciate 0
      12-03-2009, 01:22 AM   #26
J Tyler
My ride: bimmergirl84
United_States
23
Rep
302
Posts

Drives: For free.
Join Date: Jun 2008
Location: SloCal

iTrader: (0)

Quote:
Originally Posted by vwong View Post
No, I meant the first sort of "U" turn in the in-field section. A lot of people took a line where they would run wide and miss the 1st apex, then late apex the 2nd. But I found that taking it as a double apex was quicker. Just curious, which line did you take for that turn?
Here's my $.02....

That corner is all about exit speed because it leads onto a long straight, so the line there really depends on the car. A low-hp car (or an AWD car) will want something like what you did, using both apexes and a constant radius to keep up mid-corner speed. The low-hp car, because you need to keep the speed up as much as possible, and the AWD car because it does not need the large exit radius to put power down.

But, for Harold's RWD 335i with good power and not much tire, it needed the biggest corner-exit radius line possible -- which meant I would be about 1 car width to the right of the first apex, brake really deep, rotate the car in the middle of the corner, and that would set me up for a big exit radius which allowed the car to put power down much better. - Sounds more like how the other people in your group were doing it. This seems a little counter-intuitive but for Harold's car, it worked.


Here's me attempting to drift that corner....

http://www.youtube.com/watch?v=PAtZ2kNRxXk
Appreciate 0
      12-04-2009, 05:42 PM   #27
zsapphire7
Colonel
zsapphire7's Avatar
United_States
113
Rep
2,368
Posts

Drives: 08 e92 M3
Join Date: Oct 2007
Location: SF Bay Area

iTrader: (21)

Quote:
Originally Posted by HP Autowerks View Post
18x9.5 F with 265-35R18

18x10 R with 285-35R18
Crazy !
Appreciate 0
      12-05-2009, 01:24 AM   #28
kenneth
Major General
kenneth's Avatar
Canada
127
Rep
8,745
Posts

Drives: 335i Sedan
Join Date: Mar 2007
Location: Montreal

iTrader: (16)

Congrats Harold and Jeff. What spring rates f/r did you end up using for that track?
__________________
SB, Terra, 6MT. Only a few mods here and there.....nothing extreme!
Appreciate 0
      12-05-2009, 01:29 AM   #29
HP Autosport
Supreme Allied Commander
United_States
4211
Rep
56,228
Posts

Drives: F80 M3
Join Date: Mar 2007
Location: Santa Barbara, AP, Brembo, GIAC, Koni, Ohlins, Performance Friction, www.hpautosport.com

iTrader: (36)

Quote:
Originally Posted by kenneth View Post
Congrats Harold and Jeff. What spring rates f/r did you end up using for that track?
Thank you!

450F and 800R
Appreciate 0
      12-05-2009, 02:36 AM   #30
ar design
ar design's Avatar
United_States
304
Rep
4,408
Posts

Drives: 04 M3
Join Date: Jan 2008
Location: Denver, CO

iTrader: (9)

Way to go, fellas!!!
__________________
-Critter
Appreciate 0
      12-05-2009, 12:38 PM   #31
Hit_Apex
Riding the knock sensor
Hit_Apex's Avatar
3260
Rep
2,080
Posts

Drives: 21 X5MC | 23 M4CSL
Join Date: May 2008
Location: PCH

iTrader: (1)

Garage List
2023 BMW M4 CSL  [0.00]
2021 BMW X5MC  [10.00]
Quote:
Originally Posted by HP Autowerks View Post
Thank you!

450F and 800R
Is this without a rear swaybar?
__________________
Appreciate 0
      12-05-2009, 01:27 PM   #32
kenneth
Major General
kenneth's Avatar
Canada
127
Rep
8,745
Posts

Drives: 335i Sedan
Join Date: Mar 2007
Location: Montreal

iTrader: (16)

Quote:
Originally Posted by HP Autowerks View Post
Thank you!

450F and 800R
Thanks Harold! Can't wait for my AST/Swift to arrive in March.
__________________
SB, Terra, 6MT. Only a few mods here and there.....nothing extreme!
Appreciate 0
      12-05-2009, 02:16 PM   #33
HP Autosport
Supreme Allied Commander
United_States
4211
Rep
56,228
Posts

Drives: F80 M3
Join Date: Mar 2007
Location: Santa Barbara, AP, Brembo, GIAC, Koni, Ohlins, Performance Friction, www.hpautosport.com

iTrader: (36)

Quote:
Originally Posted by Hit_Apex View Post
Is this without a rear swaybar?
With the E90 M3 rear bar.
Appreciate 0
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 01:03 AM.




e90post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2025, 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