BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
 





 

Post Reply
 
Thread Tools Search this Thread
      04-24-2012, 12:43 PM   #331
Everfly
Lieutenant Colonel
 
Everfly's Avatar
 
Drives: 2012 135i M sport.
Join Date: Apr 2011
Location: Indianapolis

Posts: 1,970
iTrader: (27)

Quote:
Originally Posted by mineo77 View Post
We can dyno but my car is pretty modified already so wont yield the best results, esp since its a huge PIA to swap to stock DP's / exhaust and compare to this one, mainly cause I am way too lazy to lug all my OE shit to HPF to do this dyno. With any exhaust it will increase flow and increase HP a bit, but no exhaust is going to really do too much for HP. This exhaust is to supplement other mods so it increases efficiency to all the mods you got.
I don't think it's hard to find a stock car coming for dyno with this exhaust set up. I am pretty sure someone local will volunteer though.
__________________
Everfly is offline  
0
Reply With Quote
      04-24-2012, 01:13 PM   #332
mineo77
Lieutenant Colonel
 
mineo77's Avatar
 
Drives: 2010 135i,1989 PRO3,2001 530i
Join Date: Aug 2009
Location: Portland,OR

Posts: 1,928
iTrader: (2)

Garage List
2010 135i coupe  [3.78]
Send a message via AIM to mineo77
Quote:
Originally Posted by Everfly View Post
I don't think it's hard to find a stock car coming for dyno with this exhaust set up. I am pretty sure someone local will volunteer though.

I will leave that option to HPF to decided if they want to do that. Like I mentioned, dyno'd exhaust dont really give us any information.
__________________
mineo77 is offline   United_States
0
Reply With Quote
      04-24-2012, 01:19 PM   #333
Everfly
Lieutenant Colonel
 
Everfly's Avatar
 
Drives: 2012 135i M sport.
Join Date: Apr 2011
Location: Indianapolis

Posts: 1,970
iTrader: (27)

Quote:
Originally Posted by mineo77 View Post
Like I mentioned, dyno'd exhaust dont really give us any information.
WHY NOT?
RE dyno their axle back and gain 9rwhp over stock. That's very impressive for just axle back.
__________________
Everfly is offline  
0
Reply With Quote
      04-24-2012, 02:25 PM   #334
mineo77
Lieutenant Colonel
 
mineo77's Avatar
 
Drives: 2010 135i,1989 PRO3,2001 530i
Join Date: Aug 2009
Location: Portland,OR

Posts: 1,928
iTrader: (2)

Garage List
2010 135i coupe  [3.78]
Send a message via AIM to mineo77
Quote:
Originally Posted by Everfly View Post
WHY NOT?
RE dyno their axle back and gain 9rwhp over stock. That's very impressive for just axle back.

exhaust isnt really a go-fast modification, it is to allow your go-fast mods to work more efficiently. straight up exhaust alone will just make you sound fast.
__________________
mineo77 is offline   United_States
0
Reply With Quote
      04-24-2012, 03:30 PM   #335
calhounboi
Enlisted Member
 
Drives: 2008 135i
Join Date: Feb 2011
Location: Ga

Posts: 39
iTrader: (0)

Seriously? I have personally dyno'd my previous car before and after exhaust (same day)and gained almost 20whp. If this exhaust is eliminating 2 cats for us n54 guys and eliminating the rear muffler......there should be signifigant hp gains. Not to mention less bends and the 3.5" piping. Exhausts DO make power on turbo cars. If I see proof that the factory exhaust flows well enough that even this system doesn't show gains then I'll just stay stock. $1500 for no results on the dyno? I don't think so
calhounboi is offline  
0
Reply With Quote
      04-24-2012, 04:33 PM   #336
Mr. Nice
Colonel
 
Mr. Nice's Avatar
 
Drives: 135i / B6 A4
Join Date: Jul 2010
Location: Chicago - Lakeview

Posts: 2,569
iTrader: (3)

Garage List
2010 BMW 135i  [3.19]
2005 Audi A4  [2.75]
the major choking points are the primary cats, biggest gains in exhaust system will be seen by switching to catless downpipes. I'd imagine on the 135 we'd see maybe a 15whp gain with this exhaust. You don't buy an exhaust for power on these cars, everyone should know that by now.
__________________
Quote:
Originally Posted by djkrajzi View Post
Mr nice doesn't play nice. But I guess he has a very fast car
Mr. Nice is offline  
0
Reply With Quote
      04-24-2012, 05:25 PM   #337
calhounboi
Enlisted Member
 
Drives: 2008 135i
Join Date: Feb 2011
Location: Ga

Posts: 39
iTrader: (0)

If that's the case then I don't see any reason to buy a full exhaust when you can get an axleback for weight savings and sound for 1/3 the price. That's just my opinion tho. Doesn't seem right that a 3.5" straight pipe should cost over $1500 and only give 15hp, but I do believe you. Guess I'm done looking at exhausts
calhounboi is offline  
0
Reply With Quote
      04-24-2012, 05:47 PM   #338
Black Sheep
A Zip an a Double Cup
 
Black Sheep's Avatar
 
Drives: 2009 BMW 135i
Join Date: Feb 2010
Location: McHenry, IL

Posts: 4,463
iTrader: (5)

This exhaust will save you 40lbs dont forget that.
__________________

PTF Tuned | RB's | AMS FMIC | AR DP's | HPF Exhaust | CP-E DCI | Apex Arc 8's | 235/275 Star Specs |
Black Sheep is offline   United_States
0
Reply With Quote
      04-24-2012, 06:02 PM   #339
BMW86
Major General
 
Drives: 135i CLA45 AMG Ninja
Join Date: Jul 2008
Location: Australia

Posts: 8,948
iTrader: (0)

Quote:
Originally Posted by Everfly View Post
I don't think it's hard to find a stock car coming for dyno with this exhaust set up. I am pretty sure someone local will volunteer though.
I'm not sure why anyone would want to see the delta from this exhaust on a stock tune. The majority of this forum are running some kind of tune and bolt-on's parts don't make a great deal of power on stock boost levels anyway.
__________________
BMW 135i N54 TWIN TURBO
Quarter Mile 12.173@113.70mph - Street Tyres
Queensland Raceway Sprint 1:01:22 - Street Tyres
Queensland Raceway Clubman 1:04:74 - Street Tyres
Lakeside Raceway 1:03:97 - Street Tyres
BMW86 is offline   Australia
0
Reply With Quote
      04-24-2012, 06:09 PM   #340
Everfly
Lieutenant Colonel
 
Everfly's Avatar
 
Drives: 2012 135i M sport.
Join Date: Apr 2011
Location: Indianapolis

Posts: 1,970
iTrader: (27)

Quote:
Originally Posted by BMW86 View Post
I'm not sure why anyone would want to see the delta from this exhaust on a stock tune. The majority of this forum are running some kind of tune and bolt-on's parts don't make a great deal of power on stock boost levels anyway.
Some people just go for the sound and looks I would say 40% maybe? I love those burn tips special adjustable since I could not find any axle back to sit flus with the CF diffuser. Also 15rwh is good to have
__________________
Everfly is offline  
0
Reply With Quote
      04-24-2012, 07:10 PM   #341
Mr. Nice
Colonel
 
Mr. Nice's Avatar
 
Drives: 135i / B6 A4
Join Date: Jul 2010
Location: Chicago - Lakeview

Posts: 2,569
iTrader: (3)

Garage List
2010 BMW 135i  [3.19]
2005 Audi A4  [2.75]
Allowing the turbos to spool more efficiently is invaluable, especially if you plan on upgrading them in the future
__________________
Quote:
Originally Posted by djkrajzi View Post
Mr nice doesn't play nice. But I guess he has a very fast car
Mr. Nice is offline  
0
Reply With Quote
      04-24-2012, 10:01 PM   #342
BBBluey
Captain
 
BBBluey's Avatar
 
Drives: very slow and courteous
Join Date: Mar 2009
Location: Santa Maria, California

Posts: 941
iTrader: (7)

how about 0-60 times comparison? less weight and more efficient spool should improve it what...? Was this exhaust more for preperation of the supposed N54 change to HPF single turbo?
BBBluey is offline  
0
Reply With Quote
      04-25-2012, 11:58 AM   #343
mineo77
Lieutenant Colonel
 
mineo77's Avatar
 
Drives: 2010 135i,1989 PRO3,2001 530i
Join Date: Aug 2009
Location: Portland,OR

Posts: 1,928
iTrader: (2)

Garage List
2010 135i coupe  [3.78]
Send a message via AIM to mineo77
So there are a lot of varied response here to address. First off if you buy exhaust purely for HP increase and are not planning to do anything else you will be disappointed. The purpose for ANY exhaust system is to create more flow, less back pressure, and increase efficiency of other mods. Its not a 1:1 comparison depending on your modifications etc. The HPF exhaust is NOT for those just looking for a different sound, it was specifically developed for those with other modifications and for the signel turbo kit. The short comings are the DP's and if you want "big" gains from an exhaust you need to remove your cats. 0-60 times are not very important to folks so you dont see a lot of that out there with exception of the manufacturer of your car. So if you want all show no go, then save your $$ and get an axle back. If you are looking to supplement your other mods then the HPF is a no brainer. it is $$, but its not for everyone.
__________________
mineo77 is offline   United_States
0
Reply With Quote
      04-25-2012, 08:59 PM   #344
calhounboi
Enlisted Member
 
Drives: 2008 135i
Join Date: Feb 2011
Location: Ga

Posts: 39
iTrader: (0)

Axle back for all show no go? You said in your last post that an exhaust isn't a "go fast" mod and others have stated this full system shouldn't show much power gains. So how is it better than an axle back? I think that if this exhaust DOES "create more flow, less back pressure, and increase efficiency of other mods" then we should see power gains. Especially on a car that already has intakes, dp's, and increased boost. What am I missing here?
calhounboi is offline  
0
Reply With Quote
      04-25-2012, 10:09 PM   #345
mineo77
Lieutenant Colonel
 
mineo77's Avatar
 
Drives: 2010 135i,1989 PRO3,2001 530i
Join Date: Aug 2009
Location: Portland,OR

Posts: 1,928
iTrader: (2)

Garage List
2010 135i coupe  [3.78]
Send a message via AIM to mineo77
Quote:
Originally Posted by calhounboi View Post
Axle back for all show no go? You said in your last post that an exhaust isn't a "go fast" mod and others have stated this full system shouldn't show much power gains. So how is it better than an axle back? I think that if this exhaust DOES "create more flow, less back pressure, and increase efficiency of other mods" then we should see power gains. Especially on a car that already has intakes, dp's, and increased boost. What am I missing here?
I have no idea what you are missing here. My point was that if you have no mods, no tune then just get an axle back for a more aggressive sound. if you have mods and a tune that require more flow then you need to redo your exhaust and readapt your tune.
__________________
mineo77 is offline   United_States
0
Reply With Quote
      04-26-2012, 01:10 PM   #346
Grayson
Heisenberg
 
Grayson's Avatar
 
Drives: 2008 135i
Join Date: Mar 2012
Location: Santa Cruz, CA

Posts: 563
iTrader: (2)

What you're saying is straight forward, he just doesn't get it.

Can you comment on the application to an N55 and also the emission question asked earlier?

Really looking forward to this exhaust.
__________________

AR Catless Downpipes | Berk Full Street Exhaust | HPF FMIC | COBB AP | aFe Magnum Stage 2 | E93 M3 Front Sway Bar & Bushings | Michelin Pilot Super Sports | Hardwired Radar | Eurotek BBS LM | Schmiedmann LCI Blacklines | BMW Performance: Spoiler, Diffuser, Shift Boot, E-Brake
Grayson is offline  
0
Reply With Quote
      04-26-2012, 02:00 PM   #347
mineo77
Lieutenant Colonel
 
mineo77's Avatar
 
Drives: 2010 135i,1989 PRO3,2001 530i
Join Date: Aug 2009
Location: Portland,OR

Posts: 1,928
iTrader: (2)

Garage List
2010 135i coupe  [3.78]
Send a message via AIM to mineo77
Quote:
Originally Posted by Grayson View Post
What you're saying is straight forward, he just doesn't get it.

Can you comment on the application to an N55 and also the emission question asked earlier?

Really looking forward to this exhaust.
I dont think it has been test fitted on a N55,(would defer that to Kirk) wouldnt see any reason it would fit up the same way since the single DP diverges to 2 pipes into the midpipe. please remind me of hte emission question, couldnt find it.
__________________

Last edited by mineo77; 04-26-2012 at 02:07 PM.
mineo77 is offline   United_States
0
Reply With Quote
      04-26-2012, 10:00 PM   #348
ams109
Enlisted Member
 
Drives: 135i n54
Join Date: Apr 2012
Location: Bahrain

Posts: 47
iTrader: (0)

by adding spacers to the x brace for clearance isnt that going to make the x brace softer or something
ams109 is offline  
0
Reply With Quote
      05-07-2012, 12:09 PM   #349
kris09
Enlisted Member
 
Drives: 2009 328i 6MT
Join Date: Feb 2009
Location: miami,fl

Posts: 43
iTrader: (3)

Any Updates????
kris09 is offline   United_States
0
Reply With Quote
      05-07-2012, 10:10 PM   #350
evilstib
Bimmer Newbie
 
Drives: CSM N54 Prem/Comf/Sound
Join Date: Aug 2010
Location: Bear's Ass Canada! (Fort Mac)

Posts: 292
iTrader: (0)

Send a message via Skype™ to evilstib
Quote:
Originally Posted by Black Sheep View Post
This exhaust will save you 40lbs dont forget that.
Wasn't it 40 lbs off a 335i exhaust? Ours is 1/2 theirs....
evilstib is offline   Canada
0
Reply With Quote
      05-08-2012, 09:33 AM   #351
bignico_05
Second Lieutenant
 
Drives: aw 135i m sport
Join Date: Dec 2009
Location: montreal

Posts: 291
iTrader: (0)

Quote:
Originally Posted by kris09
Any Updates????
+1
bignico_05 is online now  
0
Reply With Quote
      05-16-2012, 08:25 AM   #352
Mr. Nice
Colonel
 
Mr. Nice's Avatar
 
Drives: 135i / B6 A4
Join Date: Jul 2010
Location: Chicago - Lakeview

Posts: 2,569
iTrader: (3)

Garage List
2010 BMW 135i  [3.19]
2005 Audi A4  [2.75]
status?
__________________
Quote:
Originally Posted by djkrajzi View Post
Mr nice doesn't play nice. But I guess he has a very fast car
Mr. Nice is offline  
0
Reply With Quote
Post Reply

Bookmarks

Tags
hpf, hpf exhaust

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 12:52 PM.




1addicts
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