Steptronic Vs Manual Questions - BMW Forum - BimmerWerkz.com
3-Series (E46, E90) Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.

 
LinkBack Thread Tools Display Modes
#1 (permalink) Old 01-12-2005, 10:32 AM
n00b
 
Join Date: Dec 2004
Posts: 45
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Jellybelly is an unknown quantity at this point
(Thread Starter)
An odd question about how manuals accelerate faster than automatics. I usually see that manuals are about .5-1 second faster. Now, when testing for acceleration speeds with automatics with Steptronic, do they use the "manual mode" or just leave the car in full automatic? How much faster would, say, a 325i manual accelerate against a 325i auto, but using the Steptronic?
Jellybelly is offline  
Sponsored Links
Advertisement
 
#2 (permalink) Old 01-12-2005, 02:04 PM
3rd Gear Member
 
Join Date: Aug 2003
Location: Baltimore MD
Posts: 729
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
peterkulesza is an unknown quantity at this point
imho: won't make any difference, slushbox (steptronic) is always slower due to torque converter losses.

smg should be faster, unless your name is carlos sainz.
peterkulesza is offline  
#3 (permalink) Old 01-12-2005, 07:56 PM
2nd Gear Member
 
TECH's Avatar
 
Join Date: Jan 2004
Posts: 434
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
TECH is an unknown quantity at this point
Steptronic is still an auto trans, it just lets you tell it when to shift.

The gear ratio's in auto's are generally broader from one to the other, so the engine isn't in the powerband as often as a closer ratio manual.
TECH is offline  
#4 (permalink) Old 01-13-2005, 05:55 AM
Neutral Member
 
Join Date: Oct 2004
Posts: 59
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
yubyub is an unknown quantity at this point
The issue is 1) power loss due to the torque converter, and 2) shifting speed.

An SMG is essentially a manual, but is clutched by computer control ("drive by wire"). Unless you are a good driver, an SMG will be faster for you than a manual. If you really know how to drive, a manual will be faster. In all cases, an auto is slower - if only because the power at the wheels is decreased by the losses introduced by the torque converter.
yubyub is offline  
Sponsored Links
Advertisement
 
Reply

  BMW Forum - BimmerWerkz.com > BMW Model Specific Forums > 3-Series (E46, E90)


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
316i 1.9l Owners Manual gmirchev 3-Series (E46, E90) 3 01-25-2005 08:38 AM
Just Got My E39 Bentley Service Manual Eric S. 5-Series (E12,E28, E34, E39, E60) 4 11-13-2004 09:56 PM
Bentley Service Manual? mikester328 3-Series (E36) 5 04-28-2004 05:50 PM
330i ZHP with steptronic joeyg 3-Series (E46, E90) 9 04-16-2004 09:14 PM

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
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome