E90Post
 


TireRack
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > NA Engine (non-turbo) / Drivetrain / Exhaust Modifications > n51 engines



Reply
 
Thread Tools Search this Thread
      02-05-2013, 03:12 PM   #1
dghits26
Lieutenant
8

 
Drives: 335xi
Join Date: Jan 2012
Location: brooklyn


Posts: 525
iTrader: (1)

n51 engines

Is it true that n51 engines come already stock with 3 stage manifold ? So if I were to remove the cats would this be a automatic gain in power ?
Appreciate 0
      02-05-2013, 03:23 PM   #2
jc5988
Lieutenant
6

 
Drives: 2010 328i 6MT Sport Pkg
Join Date: Aug 2011
Location: SOCAL


Posts: 432
iTrader: (0)

yes and yes
__________________
N51- Perfomance Intake - Performance Exhaust - ESS Tuned - Performance SSK - CDV Delete - AFE Mid
Appreciate 0
      02-05-2013, 04:25 PM   #3
dghits26
Lieutenant
8

 
Drives: 335xi
Join Date: Jan 2012
Location: brooklyn


Posts: 525
iTrader: (1)

That seems very simple....Do you know what the gains would get with the PE and then simply removing the cats on a n51

Would this cause any issues in the future for my car ?
Appreciate 0
      02-05-2013, 06:36 PM   #4
jc5988
Lieutenant
6

 
Drives: 2010 328i 6MT Sport Pkg
Join Date: Aug 2011
Location: SOCAL


Posts: 432
iTrader: (0)

3-5 for PE, about 10 for both main and secandary cats removal.

PE wont cause any problem.

the cat will cause issue when u need smog exam done, also you need get a tune to get the setting right.

bonus part for N51, all emission related parts are covered by factory for i think 100k miles/10year N51 only special warranty.
__________________
N51- Perfomance Intake - Performance Exhaust - ESS Tuned - Performance SSK - CDV Delete - AFE Mid
Appreciate 0
      02-05-2013, 07:54 PM   #5
Eagle1oh7
Captain
United_States
8

 
Eagle1oh7's Avatar
 
Drives: '11 328i Sedan
Join Date: Oct 2012
Location: Chula Vista CA


Posts: 710
iTrader: (0)

Quote:
Originally Posted by jc5988 View Post
3-5 for PE, about 10 for both main and secandary cats removal.

PE wont cause any problem.

the cat will cause issue when u need smog exam done, also you need get a tune to get the setting right.

bonus part for N51, all emission related parts are covered by factory for i think 100k miles/10year N51 only special warranty.
Good to know! I didn't know this, where did you get that little detail?
__________________
DONE: Seibon CF Hood, M3 Rep, MSport rear w/Duke Dynamics CF Diffuser, M3 Rep Skirts, aFe Stage 2 PRO-R Intake, Seibon CSL trunklid, Forgestar F14 18s w/Michelin PSS

FUTURE MODS: Eisenmann Full Cat-back Exhaust, OETuning ECU, AA Headers, CF mirror caps, Bi-Xenon headlights, CF rooftop, CF lip
Appreciate 0
      02-05-2013, 08:16 PM   #6
dghits26
Lieutenant
8

 
Drives: 335xi
Join Date: Jan 2012
Location: brooklyn


Posts: 525
iTrader: (1)

Wow I didn't know that . I'm about to get a AA tune so that should help. So if n51 are so special , should they be faster out of the factory ?
Appreciate 0
      02-05-2013, 08:21 PM   #7
dghits26
Lieutenant
8

 
Drives: 335xi
Join Date: Jan 2012
Location: brooklyn


Posts: 525
iTrader: (1)

What are emission parts ?
Appreciate 0
      02-05-2013, 08:42 PM   #8
andrey_gta
Brigadier General
Canada
51

 
andrey_gta's Avatar
 
Drives: 130i coupé ;)
Join Date: Nov 2011
Location: Bimmerpost


Posts: 3,349
iTrader: (1)

Garage List
2008 BMW 128i  [0.00]
all the catalic converters
__________________
128i Sport 6MT converted to Euro 130i spec, tuned by evolve ~220 whp 207 wtq(ft-lb) SAE
In-progress: e36M lip Wishlist: //M front arm, coils, n55 eng mnt, headers, LSD, e60 finn diff


"The 1-series is the last car that BMW engineered before the Germans, as a car-making culture, fell out of love with driving." - R&T 2013 135is
Appreciate 0
      02-06-2013, 11:27 AM   #9
1QuikWS6
No 55mph
United_States
63

 
1QuikWS6's Avatar
 
Drives: 09 E92 328iX N51 3-Stage
Join Date: Jul 2009
Location: Blitzburgh, PA


Posts: 4,754
iTrader: (83)

Garage List
Quote:
Originally Posted by dghits26 View Post
Wow I didn't know that . I'm about to get a AA tune so that should help. So if n51 are so special , should they be faster out of the factory ?
N51 has the 3-stage manifold, but it also has lowered compression compared to N52 - so they pretty much even out power wise...
__________________
2009 328ix E92//SGM//ACS Roof Spoiler//MTech Aero Lip+Trunk Spoiler//M3 Side Skirts//CF Roundels+Grilles//M3 Novillo Interior//Perf Shift Lever+Boot//MPerf DCT Wheel//M3 GT3 eBrake Handle+Boot//ACS Pedals//M3 Mirrors//LCI Tails w/LUX Rev//DTEC V7 AE+MTec 6000K D1S+HPB HID 6000K Fogs//HPB LED Interior//RPI Scoops//CF Euro Airbox+Underhood Hsgs//K&N//BMW PE//MTech Rear Bumper-iS Sport Diffuser//CF Strut Brace//Vishnu OFT//BMW 193M's+Kumho 4X
Appreciate 0
      02-06-2013, 12:43 PM   #10
jc5988
Lieutenant
6

 
Drives: 2010 328i 6MT Sport Pkg
Join Date: Aug 2011
Location: SOCAL


Posts: 432
iTrader: (0)

Quote:
Originally Posted by dghits26 View Post
Wow I didn't know that . I'm about to get a AA tune so that should help. So if n51 are so special , should they be faster out of the factory ?

BMW carefully detune the N51 to match the torque/hp with 328i N52, so they are same outta factory. however, a tune with intake, exhaust will put you same level as 330i stock.

328i N52 requires 3 stage intake in order to surpass N51 with tune.


Quote:
Originally Posted by dghits26 View Post
What are emission parts ?
all emission hoses and valves, also covers all cats.


Quote:
Originally Posted by Eagle1oh7 View Post
Good to know! I didn't know this, where did you get that little detail?
you can wiki sulev, its actually 150k miles and 15 years warranty. i think owns manual has it too in a seperate booklet.

i guess this guy got the entire fuel tank/pump replaced under sulev extended warannty.
http://chrisparente.com/2011/07/14/w...w-sulev-owner/
__________________
N51- Perfomance Intake - Performance Exhaust - ESS Tuned - Performance SSK - CDV Delete - AFE Mid
Appreciate 0
      02-06-2013, 12:55 PM   #11
MonsterM
First Lieutenant
5

 
Drives: 09 328i SP
Join Date: Sep 2011
Location: NJ


Posts: 317
iTrader: (0)

Quote:
Originally Posted by andrey_gta View Post
all the catalic converters
I know this is OT but where are you getting your AFE dry filter for the Eurobox? I can't find it on their website. I have the Eurobox but I am currently utilizing the stock OEM filter that was supplied with it. I am not sure if I should get a K & N filter or stick with dry filters.
Appreciate 0
      02-06-2013, 02:18 PM   #12
andrey_gta
Brigadier General
Canada
51

 
andrey_gta's Avatar
 
Drives: 130i coupé ;)
Join Date: Nov 2011
Location: Bimmerpost


Posts: 3,349
iTrader: (1)

Garage List
2008 BMW 128i  [0.00]
Quote:
Originally Posted by MonsterM View Post
I know this is OT
I got it from Amazon USA ( not the vendors on amazon) shipped to canada. They had the cheapest price for shipping & the deposit for customs seemed like a good idea. Should be getting the box in the next 24 hours, so will post impressions soon I went with dry because I can clean it without any recharge kits, i can even tap it against a flat surface to remove 40% of the dirt.
__________________
128i Sport 6MT converted to Euro 130i spec, tuned by evolve ~220 whp 207 wtq(ft-lb) SAE
In-progress: e36M lip Wishlist: //M front arm, coils, n55 eng mnt, headers, LSD, e60 finn diff


"The 1-series is the last car that BMW engineered before the Germans, as a car-making culture, fell out of love with driving." - R&T 2013 135is

Last edited by andrey_gta; 02-06-2013 at 02:47 PM.
Appreciate 0
      02-06-2013, 04:58 PM   #13
DESI4life10
Banned
Canada
47

 
DESI4life10's Avatar
 
Drives: Coding: Desi4life10@gmail.com
Join Date: Oct 2008
Location: West of Toronto, Canada


Posts: 3,365
iTrader: (18)

Quote:
Originally Posted by andrey_gta View Post
I got it from Amazon USA ( not the vendors on amazon) shipped to canada. They had the cheapest price for shipping & the deposit for customs seemed like a good idea. Should be getting the box in the next 24 hours, so will post impressions soon I went with dry because I can clean it without any recharge kits, i can even tap it against a flat surface to remove 40% of the dirt.
You can just buy 2 wet filters and swap for same effect :-) That is how I do it (bought an extra for $30 shipped)
Appreciate 0
      02-07-2013, 08:35 AM   #14
MonsterM
First Lieutenant
5

 
Drives: 09 328i SP
Join Date: Sep 2011
Location: NJ


Posts: 317
iTrader: (0)

Quote:
Originally Posted by andrey_gta View Post
I got it from Amazon USA ( not the vendors on amazon) shipped to canada. They had the cheapest price for shipping & the deposit for customs seemed like a good idea. Should be getting the box in the next 24 hours, so will post impressions soon I went with dry because I can clean it without any recharge kits, i can even tap it against a flat surface to remove 40% of the dirt.
Ok, thanks I still can't find it anywhere. I guess ill just get the K & N.
Appreciate 0
      02-07-2013, 08:41 AM   #15
andrey_gta
Brigadier General
Canada
51

 
andrey_gta's Avatar
 
Drives: 130i coupé ;)
Join Date: Nov 2011
Location: Bimmerpost


Posts: 3,349
iTrader: (1)

Garage List
2008 BMW 128i  [0.00]
Quote:
Originally Posted by MonsterM View Post
Ok, thanks I still can't find it anywhere. I guess ill just get the K & N.
This is the Dry version:
http://www.amazon.com/aFe-11-10111-A...s=afe+11-10111
http://www.amazon.com/gp/offer-listi...&condition=new

Amazon price is under $70
__________________
128i Sport 6MT converted to Euro 130i spec, tuned by evolve ~220 whp 207 wtq(ft-lb) SAE
In-progress: e36M lip Wishlist: //M front arm, coils, n55 eng mnt, headers, LSD, e60 finn diff


"The 1-series is the last car that BMW engineered before the Germans, as a car-making culture, fell out of love with driving." - R&T 2013 135is
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 05:29 PM.




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