E90Post
 


 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Tracking, Autocrossing, Dragstrip, Driving Techniques > How to avoid missed shifts?



Reply
 
Thread Tools Search this Thread
      05-10-2007, 11:45 AM   #1
leftcoastman
Lieutenant Colonel
52
Rep
1,714
Posts

Drives: 335i
Join Date: Jan 2007
Location: Near some canyons

iTrader: (1)

How to avoid missed shifts?

Went to the drag strip for the first time yesterday. I'm normally a twisties guy so it was definitely a new experience to launch and just drive straight!

Out of the three runs I did, I blew my 1-2 shift in two of the runs! I somewhat forcefully move it into second at about 6000 rpms (didn't shortleg the clutch) and while the lever goes there, the gear doesn't engage.

What gives? If I gingerly put it into second, it engages just fine. But when I'm trying to shift quickly, a ginger shift just doesn't seem effective. What causes missed shifts and more importantly, how do you avoid them?

BTW - I'm in a 335i with 6MT and about 8000 miles.
Appreciate 0
      05-10-2007, 03:08 PM   #2
iceefreshjimmy
CUSTOM JEWELER
iceefreshjimmy's Avatar
South Korea
39
Rep
283
Posts

Drives: Black 335i E92
Join Date: Feb 2007
Location: LOS ANGELES, CA

iTrader: (1)

http://www.e90post.com/forums/showthread.php?t=29828

i'm not 100% sure if this is related to your shifting problem, but check this out.
__________________


www.iceefresh.com

Riss Racing V2 All The Way - www.RissRacing.com
Appreciate 0
      05-10-2007, 03:11 PM   #3
ksfrogman
Major General
ksfrogman's Avatar
United_States
570
Rep
6,750
Posts

Drives: E90 330i 6MT
Join Date: Nov 2005
Location: Torrance, CA

iTrader: (12)

Garage List
2006 330i  [0.00]
2006 330i  [0.00]
Are you lifting off the throttle at redline, flooring the clutch, shifting then dropping the clutch with throttle?
__________________
Appreciate 0
      05-10-2007, 03:41 PM   #4
leftcoastman
Lieutenant Colonel
52
Rep
1,714
Posts

Drives: 335i
Join Date: Jan 2007
Location: Near some canyons

iTrader: (1)

Quote:
Originally Posted by ksfrogman View Post
Are you lifting off the throttle at redline, flooring the clutch, shifting then dropping the clutch with throttle?
Generally yes. Sometimes I keep part throttle. Which is preferable?

BTW - I removed the CDV.
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



All times are GMT -5. The time now is 08:22 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