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 > Engine, Transmission, Exhaust, Drivetrain, ECU Software Modifications
 
Post Reply
 
Thread Tools Search this Thread
      06-29-2008, 11:31 PM   #1
M3Mikey
Private First Class
United_States
38
Rep
135
Posts

Drives: Jet Black E92 M3 Fox Red Inter
Join Date: Mar 2008
Location: Iowa

iTrader: (0)

best way to launch

hey guys, this is my first sport car ever and stick shift. I think i chose well.... My question here is how do you launch your car properly.. what is the right rpms and is it bad for your car. can someone do some explaining, i am new to this.

Thanks,
Michael
__________________
Jet Black with Fox Red ext. Interior
Appreciate 0
      06-30-2008, 07:27 AM   #2
BRDHNTR
Ground Pilot
BRDHNTR's Avatar
United_States
41
Rep
548
Posts

Drives: e92 BMW M3
Join Date: May 2008
Location: Waverly, PA

iTrader: (0)

Garage List
2002 M3  [0.00]
2008 e92 M3  [0.00]
Not sure of the actual RPMs since I am always looking at traffic and not my Tach, but I would say mid 1000's as a guess.

The trick to getting the car rolling is to give it enough gas to keep the car from stalling, but not so much that the car takes off on you. After you get used to it, try not to slip the clutch to much (because you will while you are learning). Good luck, and it isn't that difficult just takes a little bit of practice. My first car was a lot harder than this to learn on and I figured it out without ever having to replace the clutch down the road.
__________________
"The laws of physics cannot be repealed, even with DSC." - BMW Owner's Manual


Last edited by BRDHNTR; 06-30-2008 at 08:05 AM..
Appreciate 0
      06-30-2008, 08:07 AM   #3
BRDHNTR
Ground Pilot
BRDHNTR's Avatar
United_States
41
Rep
548
Posts

Drives: e92 BMW M3
Join Date: May 2008
Location: Waverly, PA

iTrader: (0)

Garage List
2002 M3  [0.00]
2008 e92 M3  [0.00]
I decided to take a quick trip to give you more info. I looked at the tach as I took off and it was consistantly around 1200 rpm.
__________________
"The laws of physics cannot be repealed, even with DSC." - BMW Owner's Manual

Appreciate 0
      06-30-2008, 09:44 AM   #4
M3Mikey
Private First Class
United_States
38
Rep
135
Posts

Drives: Jet Black E92 M3 Fox Red Inter
Join Date: Mar 2008
Location: Iowa

iTrader: (0)

thanks for the info man. I'll be out to try today.
__________________
Jet Black with Fox Red ext. Interior
Appreciate 0
      06-30-2008, 10:02 AM   #5
Mack211
Lieutenant
Mack211's Avatar
United_States
23
Rep
497
Posts

Drives: 2008 M3 - DCT
Join Date: Sep 2007
Location: Fort Collins, CO

iTrader: (0)

Quote:
Originally Posted by BRDHNTR View Post
I decided to take a quick trip to give you more info. I looked at the tach as I took off and it was consistantly around 1200 rpm.
I think he is referring to a launch for best off the line acceleration, not regular day to day driving....
__________________
2008 M3 Space Gray, Black, Syc Ant Wood Trim, DCT
2001 325ci Steel Gray - Sold
Appreciate 0
      06-30-2008, 10:22 AM   #6
lucid
Major General
lucid's Avatar
United_States
374
Rep
8,033
Posts

Drives: E30 M3; Expedition
Join Date: Apr 2007
Location: USA

iTrader: (0)

For a fast launch, you probably want to be more like in the 4000 rpms and let go off the clutch pretty quickly--but not to the extent that you dump it. That said you don't want to ride the clutch either. Somewhere in between dumping and riding it. You should get "some" wheel spin, but not too much. If you get too much wheel spin you need to back off the gas a little. It's okay/desirable to get some wheel spin as long as the tires grab on pretty quickly. Don't do this too often or you'll wear off your clutch prematurely however well you execute it.
__________________
Appreciate 0
      06-30-2008, 10:32 AM   #7
!Xoible
Banned
United_States
823
Rep
46,029
Posts

Drives: ....
Join Date: Nov 2006
Location: .

iTrader: (4)

Garage List
2008 M3  [4.00]
2007 335i  [9.00]
2008 528i  [8.00]
2006 Infiniti - G35 ...  [8.00]
i found anything over 3500 is too much wheel spin. i need to get the right amount of clutch too. i tried launching at 5500 when racing with 2 M6's on saturday. had a better launch than both, but the 3 of us had ridiculous wheel spin. (fwiw i beat both, but i think if i were driving either i would have easily beat my m3)
Appreciate 0
      06-30-2008, 10:41 AM   #8
BRDHNTR
Ground Pilot
BRDHNTR's Avatar
United_States
41
Rep
548
Posts

Drives: e92 BMW M3
Join Date: May 2008
Location: Waverly, PA

iTrader: (0)

Garage List
2002 M3  [0.00]
2008 e92 M3  [0.00]
Quote:
Originally Posted by Mack211 View Post
I think he is referring to a launch for best off the line acceleration, not regular day to day driving....
Understood. Well then, I haven't tried this for myself but Road and Track says "With MDrive, we can disable stability and select ultimate sport mode with one button. Rev to 3900 rpm and quickly release the clutch while rolling into the throttle. Shifting at redline requires only light lever pressure."

I attached the Data Sheet from their website. Good luck, and let me know how it works out.
Attached Images
File Type: pdf 0208_RT_BMW_M3_datapanel.pdf (795.6 KB, 323 views)
__________________
"The laws of physics cannot be repealed, even with DSC." - BMW Owner's Manual

Appreciate 0
      06-30-2008, 10:45 AM   #9
Big Windy
Major General
Big Windy's Avatar
United_States
150
Rep
5,124
Posts

Drives: None
Join Date: Mar 2007
Location: Bay Area

iTrader: (0)

Quote:
Originally Posted by BRDHNTR View Post
Understood. Well then, I haven't tried this for myself but Road and Track says "With MDrive, we can disable stability and select ultimate sport mode with one button. Rev to 3900 rpm and quickly release the clutch while rolling into the throttle. Shifting at redline requires only light lever pressure."

I attached the Data Sheet from their website. Good luck, and let me know how it works out.
That's a DCT car, though...or no?
Appreciate 0
      06-30-2008, 11:42 AM   #10
AwesomeM3
Colonel
AwesomeM3's Avatar
United_States
1635
Rep
2,773
Posts

Drives: F95 X5MC
Join Date: Oct 2007
Location: New Jersey

iTrader: (0)

Garage List
2015 BMW X5 M  [10.00]
2020 BMW X5M Compet ...  [0.00]
2008 M3  [10.00]
Quote:
Originally Posted by Big Windy View Post
That's a DCT car, though...or no?
The .pdf file says "6-speed manual", so I don't think it's a DCT car.
__________________
2020 F95 X5///M Competition CarBahn Autoworks Stage 1 | 2023 Lamborghini Huracan Tecnica
Appreciate 0
      06-30-2008, 05:24 PM   #11
Blip Bavarian
salivator
Blip Bavarian's Avatar
United_States
38
Rep
539
Posts

Drives: 16 GT4, 14 X5 V8 & 91 E30 LS1
Join Date: Dec 2007
Location: El Paso, Texas

iTrader: (0)

i think 3500 is about right. Also MDM works best for a clean launch.
Appreciate 0
      06-30-2008, 05:33 PM   #12
!Xoible
Banned
United_States
823
Rep
46,029
Posts

Drives: ....
Join Date: Nov 2006
Location: .

iTrader: (4)

Garage List
2008 M3  [4.00]
2007 335i  [9.00]
2008 528i  [8.00]
2006 Infiniti - G35 ...  [8.00]
have u tried launching with DSC off?? it's the awesomest thing ever. i tried it when there were cars next to me, my car started fish tailing left and righ. other cars go scared
Appreciate 0
      06-30-2008, 07:09 PM   #13
lucid
Major General
lucid's Avatar
United_States
374
Rep
8,033
Posts

Drives: E30 M3; Expedition
Join Date: Apr 2007
Location: USA

iTrader: (0)

Quote:
Originally Posted by Blip Bavarian View Post
i think 3500 is about right. Also MDM works best for a clean launch.
MDM keeps things nicely under control, but if you want the fastest launch possible and can handle the throttle yourself, you want DSC off. It makes a major difference.
__________________
Appreciate 0
      06-30-2008, 08:19 PM   #14
SS32
Major
SS32's Avatar
156
Rep
1,430
Posts

Drives: 2008 M3
Join Date: May 2007
Location: Raleigh, NC

iTrader: (0)

For a regular "launch" it should be well below 1000rpm. You don't need much to get the car going unless you're on a hill. Too much will shorten the life of the clutch. A good fast launch is somewhere between 3000 and 3500. It's hard to keep the wheels from spinning free, though.
Appreciate 0
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 04:24 AM.




m3post
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