E90Post
 


GTB Performance
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Tracking, Autocrossing, Dragstrip, Driving Techniques > Launching 6mt



Reply
 
Thread Tools Search this Thread
      01-31-2012, 09:21 PM   #1
335 oClock
MOE
335 oClock's Avatar
United_States
65
Rep
2,530
Posts

 
Drives: 2011 e92 335i 6MT
Join Date: Jun 2011
Location: Los Angeles

iTrader: (13)

Send a message via AIM to 335 oClock
Launching 6mt

I have a 6 speed manual transmission e92 and would like to get tips on how to properly launch and around what RPM to shift at....

my one question is should I hold down the DTC button for 5 seconds until DSC turns off or should I just hit it once so traction turns off?

what RPM do you guys recommend shifting at?

thanks
Appreciate 0
      02-02-2012, 12:13 PM   #2
335 oClock
MOE
335 oClock's Avatar
United_States
65
Rep
2,530
Posts

 
Drives: 2011 e92 335i 6MT
Join Date: Jun 2011
Location: Los Angeles

iTrader: (13)

Send a message via AIM to 335 oClock
anybody?
Appreciate 0
      02-02-2012, 12:19 PM   #3
merchomini
Captain
merchomini's Avatar
United_States
8
Rep
786
Posts

 
Drives: 2005 Evolution 8
Join Date: Apr 2011
Location: USA alldaway

iTrader: (0)

guess not hahaha.....i havnt really launched my car....iv done a couple quick take offs but nothing that really put o much strain on the drivetrain..

I have awd tho soo
__________________
2005 Evolution 8 - Current
2007 SGM/coral e92 335i - Sold
2009 BSM lci e90 335i xdrive - Sold
Appreciate 0
      02-02-2012, 12:20 PM   #4
MTV
Banned
Canada
56
Rep
1,906
Posts

 
Drives: E60 M5, Volvo S60R
Join Date: May 2007
Location: Montreal

iTrader: (1)

Clutch in.
Put it in 2nd gear.

Rev to 4k and DUMP the clutch.
Appreciate 0
      02-02-2012, 12:20 PM   #5
merchomini
Captain
merchomini's Avatar
United_States
8
Rep
786
Posts

 
Drives: 2005 Evolution 8
Join Date: Apr 2011
Location: USA alldaway

iTrader: (0)

my guess would be like 4k for revving it up
__________________
2005 Evolution 8 - Current
2007 SGM/coral e92 335i - Sold
2009 BSM lci e90 335i xdrive - Sold
Appreciate 0
      02-02-2012, 01:03 PM   #6
335 oClock
MOE
335 oClock's Avatar
United_States
65
Rep
2,530
Posts

 
Drives: 2011 e92 335i 6MT
Join Date: Jun 2011
Location: Los Angeles

iTrader: (13)

Send a message via AIM to 335 oClock
Quote:
Originally Posted by MTV View Post
Clutch in.
Put it in 2nd gear.

Rev to 4k and DUMP the clutch.
why 2nd gear? so the car doesn't burn out much? should I have DTC off or DSC?
Appreciate 0
      02-02-2012, 06:38 PM   #7
MTV
Banned
Canada
56
Rep
1,906
Posts

 
Drives: E60 M5, Volvo S60R
Join Date: May 2007
Location: Montreal

iTrader: (1)

1st will just spin and spin and spin.

2nd will be much faster... but more wear on the clutch.

DSC off 100% of the time my friend.
Appreciate 0
      02-02-2012, 09:33 PM   #8
merchomini
Captain
merchomini's Avatar
United_States
8
Rep
786
Posts

 
Drives: 2005 Evolution 8
Join Date: Apr 2011
Location: USA alldaway

iTrader: (0)

Quote:
Originally Posted by MTV View Post
1st will just spin and spin and spin.

2nd will be much faster... but more wear on the clutch.

DSC off 100% of the time my friend.
welllll id rather spin tires than burn my clutch......just a personal preference.
__________________
2005 Evolution 8 - Current
2007 SGM/coral e92 335i - Sold
2009 BSM lci e90 335i xdrive - Sold
Appreciate 0
      02-03-2012, 01:19 AM   #9
will.c
Lieutenant
will.c's Avatar
United_States
17
Rep
588
Posts

 
Drives: E46M
Join Date: Mar 2011
Location: Central Jersey

iTrader: (5)

Don't burn ur poor (stock) clutch....
Shift @ 6k
Appreciate 0
      02-03-2012, 02:51 AM   #10
CJ421
Brigadier General
CJ421's Avatar
United_States
60
Rep
3,263
Posts

 
Drives: 2011 E92 335i
Join Date: Feb 2011
Location: PA

iTrader: (1)

Garage List
2011 BMW 335i  [4.66]
For a hard launch, you want to get as much power to the ground as possible in the shortest period of time. In the 335, rev to ~2k in 1st and let the clutch out more abruptly than usual. Don't dump it, but let it out quick so you aren't slipping it. Tires shouldn't complain too much, maybe a chirp.
You may not win a drag race with that method, but it's a safe way to launch the car quickly with minimal stress on the drivetrain.

If you're going to turn DSC and DTC off ..... do it on a wiiiide open area, like an empty parking lot. You are on your own when you do that (BE CAREFUL). I would just turn DTC off to start with (one press). It will allow the tires to spin but not allow much side-to-side behavior (e.g. drifting).

6K is the right shift point as noted.

Launching in 2nd will put more stress on the drivetrain.

And please again be careful.
__________________
2011 BMW E92 335i, 6MT, Le Mans blue - Quaife LSD, JRZ RS Pro, JRZ camber plates, Eibach ERS, full M3 susp, custom toe arms, Powergrid end-links, SS brake lines, brake ducting, Michelin PSS, UUC SSK, ETS FMIC, ER CP, Perf. Exhaust, VAC RSIK, Sparcos; work by VAC Motorsports in Philadelphia
Appreciate 0
      02-05-2012, 09:09 PM   #11
labedra
First Lieutenant
labedra's Avatar
United_States
4
Rep
304
Posts

 
Drives: 2008 BMW 335i E92 6 MT
Join Date: Jun 2009
Location: Somewhere on Planet Earth for now.

iTrader: (2)

2500 RPM and dump the clutch while pressing hard on the gas gradually (NOT SLAMMING). You might get some spin but not that much depending on what pavement are on. 2nd gear and 4000 RPM - you will burn the clutch like a match. The gear ratio is too high for second gear during lunch. In 1st gear if I remember correctly you get up to 45 - 50 mph so think what you doing to the clutch in 2nd gear when you lunch. If your wheels start spinning you pressing on the gas too hard..... smoothness with the right foot is the key.
__________________

.../// TURBO! Why in the world would you choose anything else?... ///
Appreciate 0
      02-25-2012, 02:38 PM   #12
bigdnno98
Major
bigdnno98's Avatar
United_States
13
Rep
1,144
Posts

 
Drives: Saving $$ for an F82 M4 :0
Join Date: Jul 2011
Location: Clarksville, TN

iTrader: (7)

Well, I made my first trip to the drag strip last November before the track closed. I made 4 passes. The first, i stalled the car. VERY embarassing. The last 3 got progressively better. I've been gearing up for the upcoming drag racing season so I've been practicing. Not sure if you're tuned or not. If not, just one click the DTC button and rev to 2000-2500 and release clutch and give her some gas. Should be good to go with limited wheel spin. I'm running JB4 so i can limit my boost in 1st and 2nd gear. Right now I have it limited at 10 in 1st but i'm going to lower that to 8.8 (stock) since the best 60' time i can get right now is 2.57. That's really slow. It's quite a challenge putting 440lb tq down to the ground with no LSD. If you're into drag racing you may want to look into drag radials. I am. I'm putting some Nitto NT-01s on my stock 17" wheels for the strip. Hopefully this will help some until i buy an LSD.
__________________
99 Eclipse GSX dyno numbers soon
12 Maxima Slow
03 EVO 8 600HP Sold
09 e92 335i 440hp Sold
Appreciate 0
      03-02-2012, 08:35 AM   #13
bigdnno98
Major
bigdnno98's Avatar
United_States
13
Rep
1,144
Posts

 
Drives: Saving $$ for an F82 M4 :0
Join Date: Jul 2011
Location: Clarksville, TN

iTrader: (7)

Alright guys. I'm not sure how you guys are getting these sub 2.0 60' times. i need some help. here are my most recent 60' times. They're pretty bad. 2.79, 3.02, 4.07, 2.87, 2.70, 3.20. Mods are in the sig the car should be around 400/420. I try to ease into 1st gear because if i don't i just spin. When I get a decent launch the car still spins when I accelerate in 1st. I've seen guys with no LSDs run sub 2.0 60' times so I know it's possible. Please help!!!
__________________
99 Eclipse GSX dyno numbers soon
12 Maxima Slow
03 EVO 8 600HP Sold
09 e92 335i 440hp Sold
Appreciate 0
      04-04-2012, 01:28 PM   #14
335 oClock
MOE
335 oClock's Avatar
United_States
65
Rep
2,530
Posts

 
Drives: 2011 e92 335i 6MT
Join Date: Jun 2011
Location: Los Angeles

iTrader: (13)

Send a message via AIM to 335 oClock
so... dtc off or dsc off?
Appreciate 0
      04-04-2012, 04:10 PM   #15
christiandflores
Second Lieutenant
United_States
11
Rep
259
Posts

 
Drives: BMW M3 E46
Join Date: Aug 2011
Location: San Diego, CA

iTrader: (0)

Garage List
2005 BMW M3 E46  [0.00]
Quote:
Originally Posted by 335 oClock View Post
so... dtc off or dsc off?
i tried around 2K RPM in 1st gear, with DTC and DSC off. this was the result

Appreciate 0
      04-11-2012, 09:54 AM   #16
Leshik
Private First Class
Russian Federation
2
Rep
140
Posts

 
Drives: E90 335i
Join Date: May 2010
Location: Brooklyn NY

iTrader: (2)

Garage List
2008 BMW 335i  [4.00]
Send a message via Skype™ to Leshik
thats the way i launch as well i rev to 2-2500 rpm and turn the dct completly off and go for it. try to control ur throttle im also new at this but i got alot of friends who older and used to drag alot.
Appreciate 0
      04-23-2012, 01:17 PM   #17
runnerx
Second Lieutenant
runnerx's Avatar
United_States
2
Rep
259
Posts

 
Drives: 06 M roadster; 06 330i 6spd
Join Date: Apr 2007
Location: Bay Area, California

iTrader: (0)

Quote:
Originally Posted by merchomini View Post
welllll id rather spin tires than burn my clutch......just a personal preference.
dumping on 2nd will kill your synchro as well.
__________________
2006 BMW ///M Roadster 6spd manual
2006 BMW 330i 6spd manual


https://lh5.googleusercontent.com/--bIgrh8ES_s/TxSUCvOmDUI/AAAAAAAAPh0/OOjwrRZtta0/s912/z4mcomparo.jpg
Appreciate 0
      06-01-2012, 12:21 PM   #18
JesterEXW
Private First Class
United_States
3
Rep
146
Posts

 
Drives: 2009 335i, Space Gray / Black
Join Date: Apr 2012
Location: Reston, VA

iTrader: (0)

Anybody getting some bog issues when dropping it in 1st above 2500rpm? I am attempting to find that sweet spot, (most power and least spin) for my launch and I seem to be bogging 50% of the time. I think this car can be taken up to 3500 in 1st (maybe higher) with a smooth clutch drop and get better times but I wanted to see what everyone thinks...
Appreciate 0
      06-04-2012, 02:36 PM   #19
Phantom 335i
Second Lieutenant
Canada
2
Rep
270
Posts

 
Drives: 335i
Join Date: Nov 2011
Location: Edmonton

iTrader: (2)

Garage List
2007 BMW 335i  [0.00]
I am stock and in my 07 335 I cut a 2.099 60' at a Elevation of 2200'

I heated up the tires a little bit and launched at about 2700 RPM, Traction controll fully off
Appreciate 0
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
Forum Jump


All times are GMT -5. The time now is 11:23 PM.




e90post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
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