E90Post
 


 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > All-Wheel-Drive (Xi / xDrive) Talk > Launching your car



Reply
 
Thread Tools Search this Thread
      08-15-2014, 11:45 PM   #1
hybridel
First Lieutenant
hybridel's Avatar
Canada
217
Rep
366
Posts

Drives: Brooklyn Grey X3MC
Join Date: Oct 2013
Location: Calgary

iTrader: (3)

Launching your car

How do you fine folks usually go about launching your car?

DTC on or fully off?

I'll be going FBO, and Cobb stage 2 once I get everything installed.

Wondering what the best way to launch an awd car is, without frying the clutch
Appreciate 0
      08-16-2014, 10:49 PM   #2
hybridel
First Lieutenant
hybridel's Avatar
Canada
217
Rep
366
Posts

Drives: Brooklyn Grey X3MC
Join Date: Oct 2013
Location: Calgary

iTrader: (3)

Appreciate 0
      08-16-2014, 11:46 PM   #3
LI_Goalie
Private First Class
8
Rep
110
Posts

Drives: 2009 335xi E92 6MT
Join Date: Dec 2013
Location: Long Island, NY

iTrader: (0)

You would rather fry your clutch than your transfer case/cv joints/halfshafts...

I try not to launch my car to be honest. I have to launch at like 4,500 rpm to not bog and honestly it scares me too much.
Appreciate 0
      08-17-2014, 12:43 AM   #4
Sidewinderpb
Banned
329
Rep
1,739
Posts

Drives: 2017 340i xDrive 6mt
Join Date: Nov 2013
Location: CT

iTrader: (7)

Don't do it?
Appreciate 0
      08-17-2014, 03:36 AM   #5
flux45
Private
7
Rep
64
Posts

Drives: 2011 335i xDrive
Join Date: Apr 2014
Location: ATX

iTrader: (1)

Let me preface this with I have only launched a few times, however when I do I usually do it with DTC on allowing the tires to spin just a bit. I dont just drop the clutch, but rather rev it to ~2.5-3k RPM and ease the clutch out until it grabs fully.
Appreciate 0
      08-18-2014, 02:16 AM   #6
drGK
Private First Class
drGK's Avatar
3
Rep
124
Posts

Drives: e92 335 xi
Join Date: Apr 2013
Location: NJ

iTrader: (0)

Don't do it man. Not worth it.
Appreciate 0
      08-18-2014, 02:54 PM   #7
CWysong
tuned n dropped 335xi
12
Rep
332
Posts

Drives: '09 335i Xdrive e90
Join Date: Sep 2011
Location: Dayton, Ohio

iTrader: (2)

For those who bought this car to both mod and drive it... as you very much will if you are going fbo.

I only rev up to about 2500 rpms when I launch, do it right and no tire chirps and you LAUNCH with the awd. Think of it as you want the engine going enouhg that the turbos (plural...hope you got the n54!!) are starting to spool the second you start moving. You don't want to launch too low or at idle because then you will have to wait for the turbo to spool up and therefore saving valuable seconds!!

This car jumps lengths ahead if you get a good launch, the awd plus the turbo powah are surprising. Higher HP cars will catch you on the top end but nothing I have raced against can keep up the first 60 feet or so.
__________________
335xi - BMS DCI - VRSF DP's - JB4 Tune - KW v1 -
Appreciate 0
      08-19-2014, 01:58 PM   #8
hybridel
First Lieutenant
hybridel's Avatar
Canada
217
Rep
366
Posts

Drives: Brooklyn Grey X3MC
Join Date: Oct 2013
Location: Calgary

iTrader: (3)

right on, thanks for the info!

I'm going to be taking my car to the track to see what it can do once my mods are complete

hopefully I don't break anything when I launch it lol
Appreciate 0
      08-19-2014, 02:08 PM   #9
LI_Goalie
Private First Class
8
Rep
110
Posts

Drives: 2009 335xi E92 6MT
Join Date: Dec 2013
Location: Long Island, NY

iTrader: (0)

2,500 rpm really isn't much of a launch. It's more of a speedy roll out. I find you need a very very high rpm to actually launch this car, which is why I don't do it. It has a shit ton of grip off the line. 2,500 rpm is fine, you will still bog as the turbos get going and your rpms rise, but it's better than nothing.
Appreciate 0
      08-19-2014, 03:31 PM   #10
ccraig13
Lieutenant
ccraig13's Avatar
54
Rep
485
Posts

Drives: '07 E92 328xi 6MT
Join Date: Sep 2010
Location: NJ

iTrader: (0)

How hard is 2.5k RPMs on your clutch? I just had my clutch replaced in January so I've been babying it. I usually "launch" at less than 1k RPMs now...

Some history:
Got the car with 46k on it.
Replaced the clutch at 100k.
I had two track days with it but I still feel like the previous owner is what killed the first clutch. I mean hey, if you're going to lease a 6mt for three years, the last thing on your mind is clutch longevity
__________________
2007 328xi E92 6MT Jet Black/Coral Red | Tracks: NJMP
Appreciate 0
      08-19-2014, 04:32 PM   #11
mashimarho
BimmerPost Supporting Vendor
mashimarho's Avatar
2143
Rep
13,877
Posts


Drives: E92 M3 & F80 M3 & G82 M4
Join Date: Mar 2010
Location: Lynnwood, WA

iTrader: (45)

Garage List
Rev to 7900 RPM
and dump the clutch.
Not really....
__________________
Mashimarho.com /// Instagram /// Facebook /// Youtube /// sales@mashimarho.com /// (425) 582-7939
Appreciate 0
      08-19-2014, 11:15 PM   #12
Antetokounmpo
Brigadier General
Antetokounmpo's Avatar
United_States
1560
Rep
3,475
Posts

Drives: E90 6MT FBO; '18 F150 Platinum
Join Date: Jul 2013
Location: WI

iTrader: (3)

Garage List
Best way is to do it IMO is to rev it to about 3K then slip the clutch a little but don't dump it otherwise it'll bog. Yeah, it's not great for the clutch but it gets off the line well and doesn't hurt the drivetrain as much as dumping it from 5k. I've dumped it a few times but it bogs unless I'm above 4k which I spin all four wheels. But I'm also running 265s in the rear.
__________________

2008 335xi 6MT | VRSF Catless DP | VRSF 7" FMIC | VRSF CP | TIAL BOV | DCI | MHD 2+
BC Racing BR | Stoptech 600 | Firehawk Indy 500 255 Square | Atric Altimax 225 Sq.
2018 F-150 Platinum 701A | FX4 | 3.5 EcoBeast
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 09:56 AM.




e90post
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