THE LARGEST BMW 2-SERIES FORUM ON THE PLANET
2Addicts
2Addicts
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read
2Addicts | BMW 2-Series forum Technical Topics N55 (M235i) Engine, Transmission, Exhaust, Tuning My M235i: Dyno w/ downpipes, chargepipe and new wheels!

Post Reply
 
Thread Tools Search this Thread
      03-22-2014, 08:12 AM   #1
JustinCredibleM
Second Lieutenant
 
Drives: '14 M235i, '12 GT-R, '02 996TT
Join Date: Mar 2014
Location: Las Vegas, NV | San Diego, CA

Posts: 235
iTrader: (0)

My M235i: Dyno w/ downpipes, chargepipe and new wheels!

BIMMERPOST
     Featured on BIMMERPOST.com
Hey everyone!

I came down from my Las Vegas, NV residence to spend some time in my San Diego house this weekend, so I thought I'd get some mods done to M235i while I was at it! I bought the car down from Fresno last week and put 700 miles on it in 4 days. This week I put tried to put on another 300 to finish my break in so I could start the dyno and mod process! Here's a story about my day:

Swung by my buddy Brian's house at 11:30AM to pick him up and got to EAS (European Auto Source) around 12PM to get a baseline dyno on good 'ole ACN 91 octane. Got an average of 307whp/322wtq for the runs bone stock.

At around 1PM, I went to Evolution Racewerks (ER) to test fit and install their downpipe and charge-pipe.

Here is the Evolution Racewerks downpipe (perfect fit):

Name:  m235i-modified1.jpg
Views: 17177
Size:  174.3 KB

Stock charge-pipe -vs- Evolution Racewerks downpipe:

Name:  m235i-modified2.jpg
Views: 17195
Size:  193.1 KB

The charge-pipe was a b*tch to install, so it took around 3 hours to finish the whole thing. The downpipe only took 30 mins or so, so it was super easy. The darn charge-pipe took up most of the time because of the confined space.

Went back to EAS after for an "after" dyno with the mods:

Name:  m235i-modified3.jpg
Views: 17155
Size:  183.8 KB

Picked up 12whp and 25wtq with no tuning. You can DEFINITELY feel a huge difference with the downpipe though. The turbo comes on so much quicker and the torque is just plain ridiculous now. It pulls very nicely all the way to redline!

Here is a video with the ER downpipe and a few light revs. Popcorn anyone?



And dyno video:




VMR Wheels (Velocity Motoring) was next door, so why not test fit some wheels for the car while we were at it? The sad part is this car does not fit anything aggressive and it seems the fitment is a little more disappointing than the 1 series, lol.

Stock Rear Weight (no tire):

Name:  m235i-modified4.jpg
Views: 16604
Size:  170.0 KB

Stock Front Weight (no tire):

Name:  m235i-modified5.jpg
Views: 17086
Size:  188.5 KB

I got the VMR v705 (18x8 +45) squared setup which was ~2 pounds lighter than the stock wheels! The 1-series rim fitment and 2-series fitment seem to be a lot different. I recommend contacting VMR and seeing what they would recommend for you since they used my car for fitment/measurements. I am not a poke / rolled fenders guy since I get whatever fits on stock body to run wider tires for the road-course. I will be running a 245/255 tire setup most likely with these rims.

Name:  m235i-modified6.jpg
Views: 16468
Size:  155.6 KB

The final product:

Name:  m235i-modified7.jpg
Views: 16821
Size:  170.2 KB
Name:  m235i-modified8.jpg
Views: 17050
Size:  142.3 KB
Name:  m235i-modified9.jpg
Views: 16961
Size:  141.9 KB

Overall, I really like the rims. Not only are they lighter, but they look better and give the car a "cleaner" look over the stock rims in my opinion. I kept the BMW centercaps because I like how the blue/white matches with the white car and blue brakes .

BIG BIG BIG thanks to:

Tom & Steve @ EAS
Fred @ ER
Edgar & Matt @ VMR
Brian - For coming with me and taking all the videos and pictures!


It was a long day, but it was nice to get some things ironed out. I will be getting an intake test fitted the upcoming week, so I'll post an update about that. Then on to the JB4 tune and dyno .

Last edited by JustinCredibleM; 03-22-2014 at 08:24 AM.
JustinCredibleM is offline  
0
Reply With Quote
      03-22-2014, 08:21 AM   #2
Brings
Hard Gay~
 
Drives: '12 GT-R, '07 GT3, '14 M235i
Join Date: Jan 2011
Location: Sim City

Posts: 128
iTrader: (1)

It was a long day, but sooo worth it!

Last edited by Brings; 03-22-2014 at 08:41 AM.
Brings is offline   United_States
0
Reply With Quote
      03-22-2014, 08:45 AM   #3
Delnari
Captain
 
Delnari's Avatar
 
Drives: 2014 MG F22 Auto
Join Date: Mar 2010
Location: Alexandria, VA

Posts: 779
iTrader: (1)

Really impressed with the big numbers just for the boltons. Now I'm wondering how much more a less restricted exhaust (from the downpipe back) would give without the tune, say the M Performance exhaust for example?

Is the downpipe catted? Any engine codes so far from the change? Keep the thread going as you make more changes. Love to see how this works out and the different options you experiment with. I was thinking a JB4 stage one as a first mod to keep it simple without having to splice anything. Maybe a better air filter too. Need to keep the car as close to stock as possible given it's a lease.

Thanks again for the post!
Delnari is offline   United_States
0
Reply With Quote
      03-22-2014, 09:01 AM   #4
scottp999
Brigadier General
 
scottp999's Avatar
 
Drives: 335i - E92 - 6MT & 4runner SR5
Join Date: Mar 2007
Location: MD

Posts: 4,629
iTrader: (1)

Garage List
2007 BMW 335  [4.50]
Nice, get ready for more fun with the JB4. They have seen about 415 whp on the 435 N55 with e85, so you should see a great pop from your mods even without e85.
__________________
Rob Beck Turbos, PROcede Rev. 3, Procede Fueling Flash (via OpenFlash Tablet), PPS Methanol System (Devil's Own 12 GPH Nozzle/Aquamist Flow Sensor/Labonte VC25), DCI, Quaife LSD, BMW Performance Suspension, Autobahn Exotics Exhaust, Helix FMIC, AR Design Downpipes, BSH Catch Can, Forge Diverter Valves, P3cars Vent Boost Gauge, Alufelgen CSL Reps, Lux 5.1 H8 Angel Eyes, HPB HID Fogs, LTBMW M3 Side Skirts, BMW M3 Rear Spoiler, BMW Front Aero Lip, BMW Pedal Kit, BMW M Shift Knob, Autotecknic Matte Black Grilles.
scottp999 is offline  
0
Reply With Quote
      03-22-2014, 09:05 AM   #5
kamara1984
Second Lieutenant
 
Drives: 328i
Join Date: Nov 2010
Location: Bellevue, WA

Posts: 241
iTrader: (2)

Nice, looks clean.

What % tint did you go with? Is that stock suspension?
kamara1984 is offline  
0
Reply With Quote
      03-22-2014, 11:03 AM   #6
pikcachu
Lieutenant Colonel
 
pikcachu's Avatar
 
Drives: M235i (F22 Red angel)
Join Date: Jul 2011
Location: undisclosed

Posts: 1,511
iTrader: (0)

the first video you posted is private and can't be viewed :-(
pikcachu is online now  
0
Reply With Quote
      03-22-2014, 12:10 PM   #7
ska///235i
***** noob
 
ska///235i's Avatar
 
Drives: M235i
Join Date: Sep 2005
Location: Boston

Posts: 8,880
iTrader: (31)

Garage List
2006 325xi  [0.00]
Good stuff
ska///235i is offline   United_States
0
Reply With Quote
      03-22-2014, 01:30 PM   #8
TAY TAY
Private First Class
 
TAY TAY's Avatar
 
Drives: 2013 Audi S4
Join Date: Jun 2009
Location: Palm Beach, Florida

Posts: 195
iTrader: (1)

Did VMR mention how much more aggressive you could have gone with the wheels?
__________________
2014 M235 AW/CR - Premium/Tech/HK/Perf Exhaust/6SPD!! / 2014 X5 X-Line BSP/Terra / 2013 Ducati Monster 796
TAY TAY is offline  
0
Reply With Quote
      03-22-2014, 01:59 PM   #9
th1rd3y3
Private
 
Drives: '14 M235i, '13 335XI Sport
Join Date: May 2013
Location: United States

Posts: 91
iTrader: (0)

Very nice. I'm hoping throw mine on the dyno as well shortly after getting it. Those are some good numbers and gains for no tuning.
th1rd3y3 is offline  
0
Reply With Quote
      03-22-2014, 02:12 PM   #10
kerm1t
Lieutenant
 
Drives: MG M235i
Join Date: Jul 2013
Location: SoCal

Posts: 430
iTrader: (0)

do you know if the charge pipe made any difference? i feel like its pretty useless for n55s
kerm1t is offline  
0
Reply With Quote
      03-22-2014, 02:32 PM   #11
JustinCredibleM
Second Lieutenant
 
Drives: '14 M235i, '12 GT-R, '02 996TT
Join Date: Mar 2014
Location: Las Vegas, NV | San Diego, CA

Posts: 235
iTrader: (0)

Quote:
Originally Posted by Delnari View Post
Really impressed with the big numbers just for the boltons. Now I'm wondering how much more a less restricted exhaust (from the downpipe back) would give without the tune, say the M Performance exhaust for example?

Is the downpipe catted? Any engine codes so far from the change? Keep the thread going as you make more changes. Love to see how this works out and the different options you experiment with. I was thinking a JB4 stage one as a first mod to keep it simple without having to splice anything. Maybe a better air filter too. Need to keep the car as close to stock as possible given it's a lease.

Thanks again for the post!
The stock exhaust is pretty large in diameter and it didn't seem like much of a restriction at all (pipes alone). But I don't know how it looks within the muffler though.

The downpipe is not catted, but I am surprised it doesn't smell as much as I thought. I got the emissions light on the drive back (to be expected), but the JB4 is supposed to fix all that. I think you can splice it in a way that its 100% reversible.

Quote:
Originally Posted by scottp999 View Post
Nice, get ready for more fun with the JB4. They have seen about 415 whp on the 435 N55 with e85, so you should see a great pop from your mods even without e85.

Thanks! I am hoping to keep it on 91 for now and just get an intercooler to see how it does. I ran E85 on my other cars and its a little bit of a hassle for me and I just want to not have to plan out my routes this time lol.

Quote:
Originally Posted by kamara1984 View Post
Nice, looks clean.

What % tint did you go with? Is that stock suspension?
I got 25% tint and it is stock for now. Getting the H&R springs in a few weeks once they start shipping out.

Quote:
Originally Posted by pikcachu View Post
the first video you posted is private and can't be viewed :-(
Its public now .

Quote:
Originally Posted by TAY TAY View Post
Did VMR mention how much more aggressive you could have gone with the wheels?
They said a few millimeters and possible another half inch in the rear. But I don't want anything meeting my fender as I want to be able to run 255 or 265 rear tires. Its not the fender that's really the issue, the shock is pretty close to the hub so you can't have anything too far in.

I wish we had more to test, but it was getting late.

Quote:
Originally Posted by kerm1t View Post
do you know if the charge pipe made any difference? i feel like its pretty useless for n55s
I don't think there are any gains, it was more of a "response" and "precaution" mod for it. The stock one can expand and just pop open under boost, so I got something to where the diameter won't flex or have the ability of really popping under high boost. The car was on the lift and the charge-pipe was available, so it was just something I wanted to do.

Last edited by JustinCredibleM; 03-22-2014 at 02:39 PM.
JustinCredibleM is offline  
0
Reply With Quote
      03-22-2014, 03:25 PM   #12
hyperzulu
Captain
 
Drives: 2012 335is
Join Date: Mar 2014
Location: SoCal

Posts: 888
iTrader: (0)

It is weird that I like the sound of the exhaust now more than stock and way more than the MP exhaust, which has the popping, but isn't deep from the vids I have seen. This may be the way to go. Very nice.
hyperzulu is online now   United_States
0
Reply With Quote
      03-22-2014, 03:41 PM   #13
JustinCredibleM
Second Lieutenant
 
Drives: '14 M235i, '12 GT-R, '02 996TT
Join Date: Mar 2014
Location: Las Vegas, NV | San Diego, CA

Posts: 235
iTrader: (0)

Quote:
Originally Posted by hyperzulu View Post
It is weird that I like the sound of the exhaust now more than stock and way more than the MP exhaust, which has the popping, but isn't deep from the vids I have seen. This may be the way to go. Very nice.
I am debating on a catback since I want it louder. Its virtually as quiet as stock with the downpipe lol.
JustinCredibleM is offline  
0
Reply With Quote
      03-22-2014, 05:59 PM   #14
cmkde
Private
 
Drives: Alpine white M235i
Join Date: Mar 2014
Location: AZ

Posts: 68
iTrader: (0)

Quote:
Originally Posted by JustinCredibleM View Post
I am debating on a catback since I want it louder. Its virtually as quiet as stock with the downpipe lol.
Curious to see how the M Performance sounds in person, mine should be here Monday or so, going to add a down pipe after I get it back from the dealer.
cmkde is offline  
0
Reply With Quote
      03-22-2014, 06:28 PM   #15
JustinCredibleM
Second Lieutenant
 
Drives: '14 M235i, '12 GT-R, '02 996TT
Join Date: Mar 2014
Location: Las Vegas, NV | San Diego, CA

Posts: 235
iTrader: (0)

Quote:
Originally Posted by cmkde View Post
Curious to see how the M Performance sounds in person, mine should be here Monday or so, going to add a down pipe after I get it back from the dealer.
How much was the M-Performance exhaust? I'd like to get one!
JustinCredibleM is offline  
0
Reply With Quote
      03-22-2014, 06:38 PM   #16
cmkde
Private
 
Drives: Alpine white M235i
Join Date: Mar 2014
Location: AZ

Posts: 68
iTrader: (0)

Quote:
Originally Posted by JustinCredibleM View Post
How much was the M-Performance exhaust? I'd like to get one!
check here http://www.2addicts.com/forums/showt...=959348&page=2

I posted the invoice I got from my dealer, sort of a good deal. Wasn't expensive at all considering some of the axel-back prices coming out now over 2k.
cmkde is offline  
0
Reply With Quote
      03-22-2014, 06:40 PM   #17
JustinCredibleM
Second Lieutenant
 
Drives: '14 M235i, '12 GT-R, '02 996TT
Join Date: Mar 2014
Location: Las Vegas, NV | San Diego, CA

Posts: 235
iTrader: (0)

Quote:
Originally Posted by cmkde View Post
check here http://www.2addicts.com/forums/showt...=959348&page=2

I posted the invoice I got from my dealer, sort of a good deal. Wasn't expensive at all considering some of the axel-back prices coming out now over 2k.
Is this a whole "cat-back" or just the axel-back section?
JustinCredibleM is offline  
0
Reply With Quote
      03-22-2014, 06:41 PM   #18
cmkde
Private
 
Drives: Alpine white M235i
Join Date: Mar 2014
Location: AZ

Posts: 68
iTrader: (0)

I believe just the axel-back portion is all that M Performance does, if I'm able to be around the dealer when they install it I'll take pics for everyone.
cmkde is offline  
0
Reply With Quote
      03-22-2014, 06:50 PM   #19
JustinCredibleM
Second Lieutenant
 
Drives: '14 M235i, '12 GT-R, '02 996TT
Join Date: Mar 2014
Location: Las Vegas, NV | San Diego, CA

Posts: 235
iTrader: (0)

Quote:
Originally Posted by cmkde View Post
I believe just the axel-back portion is all that M Performance does, if I'm able to be around the dealer when they install it I'll take pics for everyone.
Cool, thanks! I think this would be something I'd rock since it sounds pretty good. When were you planning to get it installed?
JustinCredibleM is offline  
0
Reply With Quote
      03-22-2014, 07:34 PM   #20
cmkde
Private
 
Drives: Alpine white M235i
Join Date: Mar 2014
Location: AZ

Posts: 68
iTrader: (0)

Quote:
Originally Posted by JustinCredibleM View Post
Cool, thanks! I think this would be something I'd rock since it sounds pretty good. When were you planning to get it installed?
Looking for early this coming week or if I have to put it off till the following weekend then I will. That JB4 and Down pipe are what I'm going to do, should be enough for a sub-13 daily driver.
cmkde is offline  
0
Reply With Quote
      03-22-2014, 07:39 PM   #21
JustinCredibleM
Second Lieutenant
 
Drives: '14 M235i, '12 GT-R, '02 996TT
Join Date: Mar 2014
Location: Las Vegas, NV | San Diego, CA

Posts: 235
iTrader: (0)

Please take as many pics as you can! And sound clips too .
JustinCredibleM is offline  
0
Reply With Quote
      03-23-2014, 12:22 AM   #22
Greenkirby21
Vrooom :)
 
Greenkirby21's Avatar
 
Drives: C7 Stringray
Join Date: Jun 2010
Location: Dream Land

Posts: 2,606
iTrader: (1)

Send a message via AIM to Greenkirby21
great car! it sounds sick as well!
__________________
2014 C7 Corvette Stringray - Laguna Blue - NPP Exhaust - Competition Seats
Greenkirby21 is offline   United_States
0
Reply With Quote
Post 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 07:23 PM.




2addicts
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