E90Post
 


TNT Racewerks
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Twin Turbo Vs. Bi-Turbo



Reply
 
Thread Tools Search this Thread
      04-25-2007, 02:53 PM   #45
hl0m4n
Brigadier General
United_States
355

 
hl0m4n's Avatar
 
Drives: BMW
Join Date: Nov 2006
Location: NY


Posts: 4,858
iTrader: (42)

thanks for ur info man..would u say my theory between bi and twin is accurate?
Appreciate 0
      05-08-2007, 09:13 PM   #46
hl0m4n
Brigadier General
United_States
355

 
hl0m4n's Avatar
 
Drives: BMW
Join Date: Nov 2006
Location: NY


Posts: 4,858
iTrader: (42)

bump
Appreciate 0
      05-09-2007, 08:51 PM   #47
hl0m4n
Brigadier General
United_States
355

 
hl0m4n's Avatar
 
Drives: BMW
Join Date: Nov 2006
Location: NY


Posts: 4,858
iTrader: (42)

anyone?
Appreciate 0
      05-09-2007, 09:03 PM   #48
chbrules
MSVConrad++
United_States
12

 
Drives: E90 2006 325i | E92 2007 335i
Join Date: Dec 2006
Location: Peaches


Posts: 777
iTrader: (0)

bi- and twin just mean 2 turbos. The name itself won't tell you how the turbo system is setup, be it two at once or a two-stage turbo system.
Appreciate 0
      05-10-2007, 08:46 PM   #49
hl0m4n
Brigadier General
United_States
355

 
hl0m4n's Avatar
 
Drives: BMW
Join Date: Nov 2006
Location: NY


Posts: 4,858
iTrader: (42)

got ya so it is just name prefrence..?
Appreciate 0
      05-11-2007, 12:22 AM   #50
Jay@ATP
Private
0

 
Drives: 02 S2k, 06 EVO IX
Join Date: Dec 2006
Location: Chico, CA


Posts: 79
iTrader: (0)

Quote:
Originally Posted by tctic View Post
There's another thing called sequential turbo charging which is what the OP was also talking about. This sequential turbo charging is in BMW's diesel engines. It consists of two turbos. One smaller sized lower inertia turbo charger for low engine speeds. Then another one is a larger one which spools up at higher engine speeds to provide more boost for more power. The benefit here is that the engine would suffer less from turbo lag in the lower range of the power band with the small turbo providing power initially and then switching to the larger turbo when there is enough 'exhaust power' to spool up the larger turbo. This approach is taken by most manufacturers.

The one in the 335i or the N54 engine take the approach of implementing two small turbos both simultaneously providing boost to the engine. (3 cylinders each) These small turbos should spool up very quickly therefore the driver should experience only very minimal turbo lag.

BTW, bi-turbo and twin turbo has the same meaning.
+1. Bi and twin are the same, however sequential and parallel are different.
__________________
ADVANCED TOUGE PERFORMANCE
Appreciate 0
      05-15-2007, 07:44 PM   #51
hl0m4n
Brigadier General
United_States
355

 
hl0m4n's Avatar
 
Drives: BMW
Join Date: Nov 2006
Location: NY


Posts: 4,858
iTrader: (42)

in what way?
Appreciate 0
      05-16-2007, 11:59 AM   #52
oldaccount
Colonel
United_States
57

 
oldaccount's Avatar
 
Drives: Car
Join Date: Jun 2006
Location: USA


Posts: 2,454
iTrader: (2)

Send a message via AIM to oldaccount
saw a ford commercial for the new F-series (not F-150) and they are calling their new turboed diesels "dual turbo"
Appreciate 0
      05-16-2007, 01:48 PM   #53
WAYNEBO
Captain
United_States
10

 
WAYNEBO's Avatar
 
Drives: 2007 335i
Join Date: May 2007
Location: SoCal


Posts: 670
iTrader: (1)

Garage List
2007 335i  [0.00]
I think a couple of thread contributors have pretty much summed this topic up:

'Bi' and 'Twin' mean the same, it's whether they are setup for sequential or parallel operation.

End of discussion.
__________________
2007 335i 6MT Coupe, Monaco Blue, RPi Ram Air Scoops, Magnaflow cat-backs, H&R Sport springs, 19" Staggered Miro LM-Rs
2000 F250 V10 Superduty 4WD, K&N intake, Banks Monster exhaust, DR 8" lift w/ Welds on 37s
Appreciate 0
      05-16-2007, 03:26 PM   #54
wileecoyote
New Member
0

 
Drives: BMW
Join Date: May 2007
Location: NJ


Posts: 25
iTrader: (0)

Funny that there is so much discussion about this.
------
From the bmwusa 335i features and options:
"3.0-liter dual overhead cam (DOHC), 24-valve inline turbocharged 300-horsepower 6-cylinder engine with twin-turbo technology and Double VANOS steplessly variable valve timing"
------
From the bmw.co.uk (UK) 335i prices and specification
Engine
Battery in luggage compartment with jump start facility in engine bay
Catalytic converter
High Precision Injection (direct injection system)
Six-cylinder in-line petrol engine with four-valve technology
Twin Turbo
VANOS
------
Looks like BMW is calling it a twin turbo in all markets. Even though the Euros do seem to like to call most "twin turbo" applications biturbo (ie Porsche and Audi)
Appreciate 0
      05-16-2007, 05:33 PM   #55
hl0m4n
Brigadier General
United_States
355

 
hl0m4n's Avatar
 
Drives: BMW
Join Date: Nov 2006
Location: NY


Posts: 4,858
iTrader: (42)

what is the difference between sequential or parallel operation? seq turbo go off one after another parallel same time? so 335i are seq right? twin is seq and bi is parallel or is that just the anme?
Appreciate 0
      05-16-2007, 07:55 PM   #56
shyestsparks
Captain
10

 
Drives: 335i sedan, 02 Altima VQ35DE-T
Join Date: Feb 2007
Location: Ca


Posts: 827
iTrader: (5)

Quote:
Originally Posted by hl0m4n View Post
what is the difference between sequential or parallel operation? seq turbo go off one after another parallel same time? so 335i are seq right? twin is seq and bi is parallel or is that just the anme?
Sequential means one turbo kicks in one at a time at diferent RPM ranges but both are powered by all of the engines cylinders; parallel means both turbos kick in at the same time and one turbo is usually powered by half the # of cylinders of the engine and the other turbo by the other half (as in the N54, its 3 cylinders per turbo).
Appreciate 0
      05-18-2007, 10:27 AM   #57
az335i
New Member
United_States
0

 
Drives: 07 sedan slush box
Join Date: Feb 2007
Location: Arizona


Posts: 19
iTrader: (0)

I had a girlfriend in college that was bi, but her twin wasn't!
Appreciate 0
      05-18-2007, 08:49 PM   #58
hl0m4n
Brigadier General
United_States
355

 
hl0m4n's Avatar
 
Drives: BMW
Join Date: Nov 2006
Location: NY


Posts: 4,858
iTrader: (42)

thanks and nice one
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 01:26 AM.




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