E90Post
 


Lux Angel Eyes
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > n54 crank



Reply
 
Thread Tools Search this Thread
      02-10-2015, 02:09 PM   #1
trixdout
First Lieutenant
United_States
32
Rep
390
Posts

Drives: '11 335xi 6mt
Join Date: Apr 2014
Location: NNJ

iTrader: (1)

n54 crank

I've searched and searched and searched, maybe not hard enough.

I understand the n54 crank is forged.

My question is, are the specs and measurements of the n55 crank the same as the n54 crank? Meaning, for a n55 motor build, could I swap in the n54 crank as a means to cut cost rather than buying a forged crank? It would make things cheaper.

The blocks are essentially the same. I don't see why bmw would have to go and machine a block differently.
__________________
LMB , M-Sport, JB4 Stg. 2, AR catless res. dp, ETS cp
Appreciate 0
      02-11-2015, 08:54 PM   #2
wgknestrick
Private First Class
25
Rep
128
Posts

Drives: 2011 335 xdrive
Join Date: Dec 2014
Location: Lancaster PA

iTrader: (0)

Waste of time and money imo. Find me an instant where the n55 crank is the weakest link. Crank is probably good up to 1000 hp
Appreciate 0
      02-11-2015, 10:22 PM   #3
rhm135
Private First Class
United_States
4
Rep
123
Posts

Drives: 2012 335is DCT
Join Date: Nov 2013
Location: BMW of South Atlanta

iTrader: (0)

From my understanding internal components are the same composition between N54 and N55. But the N54 has a closed deck block I believe. But I'm sure ask anyone with an N54 and the entire car is forged haha.
__________________
2011 135i 6MT FBO Pure stage 2-RIP
2012 335is DCT-Current
Appreciate 0
      02-11-2015, 10:45 PM   #4
loesch
Captain
loesch's Avatar
United_States
62
Rep
909
Posts

Drives: 2011 BMW 135i M Sport
Join Date: Feb 2012
Location: State College, PA

iTrader: (4)

Based in this it doesn't..http://www.e90post.com/forums/showthread.php?t=196558
Appreciate 0
      02-11-2015, 10:47 PM   #5
Cloud9blue
Colonel
Cloud9blue's Avatar
United_States
298
Rep
2,988
Posts

Drives: around the potholes
Join Date: Aug 2008
Location: Chicago, IL

iTrader: (13)

Quote:
Originally Posted by rhm135 View Post
From my understanding internal components are the same composition between N54 and N55. But the N54 has a closed deck block I believe. But I'm sure ask anyone with an N54 and the entire car is forged haha.
They are all open deck. The only closed deck engine in the modern BMW engine line up is the S55.
__________________
09 BMW E92 335i: Monaco Blue / Saddle Brown / AP Racing / Wavetrac / TC Kline / Vorshlag / APEX Full Modlist
07 BMW R1200S: Shine Yellow / Akrapovic / Ohlins
Appreciate 0
      02-11-2015, 11:03 PM   #6
rhm135
Private First Class
United_States
4
Rep
123
Posts

Drives: 2012 335is DCT
Join Date: Nov 2013
Location: BMW of South Atlanta

iTrader: (0)

Quote:
Originally Posted by loesch View Post
I stand corrected. But that seems like great news. I mean considering the horsepower abuse that the N54 has taken with the N55 also being open deck.
__________________
2011 135i 6MT FBO Pure stage 2-RIP
2012 335is DCT-Current
Appreciate 0
      02-11-2015, 11:08 PM   #7
loesch
Captain
loesch's Avatar
United_States
62
Rep
909
Posts

Drives: 2011 BMW 135i M Sport
Join Date: Feb 2012
Location: State College, PA

iTrader: (4)

Quote:
Originally Posted by rhm135 View Post
I stand corrected. But that seems like great news. I mean considering the horsepower abuse that the N54 has taken with the N55 also being open deck.
Indeed it is!
Appreciate 0
      02-17-2015, 01:12 PM   #8
trixdout
First Lieutenant
United_States
32
Rep
390
Posts

Drives: '11 335xi 6mt
Join Date: Apr 2014
Location: NNJ

iTrader: (1)

Quote:
Originally Posted by wgknestrick View Post
Waste of time and money imo. Find me an instant where the n55 crank is the weakest link. Crank is probably good up to 1000 hp
Granted with a inline 6, there are 5 center mains with a total of 7. In these cases the cranks can take alot more abuse versus a v6 config with only 4 mains total.

Seems as though the n54 can get up to 800+hp on e40 or whatever motiv did. From what I've read around, the crank is forged stock on the n54.
__________________
LMB , M-Sport, JB4 Stg. 2, AR catless res. dp, ETS cp
Appreciate 0
      02-17-2015, 01:42 PM   #9
wgknestrick
Private First Class
25
Rep
128
Posts

Drives: 2011 335 xdrive
Join Date: Dec 2014
Location: Lancaster PA

iTrader: (0)

Quote:
Originally Posted by trixdout View Post
Granted with a inline 6, there are 5 center mains with a total of 7. In these cases the cranks can take alot more abuse versus a v6 config with only 4 mains total.

Seems as though the n54 can get up to 800+hp on e40 or whatever motiv did. From what I've read around, the crank is forged stock on the n54.
Generally the crank is the strongest (and most expensive) internal component in any stock engine. If you are concerned about internals (I don't know why any n55 owner would be at this point), rods and pistons would be required well before an upgraded crank.

N55s just don't have the turbo options available to warrant wasting money on internals at this point until proven otherwise. You risk screwing something up more than righting a wrong. I wouldn't even think of internals until N55s start hitting +550whp on a consistent basis.
Appreciate 0
      02-17-2015, 04:25 PM   #10
JETmn
Major
United_States
39
Rep
1,042
Posts

Drives: 2011 335i xDrive Msport
Join Date: Apr 2013
Location: Orlando

iTrader: (0)

Quote:
Originally Posted by wgknestrick View Post
Generally the crank is the strongest (and most expensive) internal component in any stock engine. If you are concerned about internals (I don't know why any n55 owner would be at this point), rods and pistons would be required well before an upgraded crank.

N55s just don't have the turbo options available to warrant wasting money on internals at this point until proven otherwise. You risk screwing something up more than righting a wrong. I wouldn't even think of internals until N55s start hitting +550whp on a consistent basis.
They have the same options available as the N54, but I just haven't seen much of anyone going for it. I am sure that is because the N55 cars are newer and have a higher value.
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 -4. The time now is 04:08 PM.




e90post
e90post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2016, 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