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2Addicts | BMW 2-Series forum Technical Topics N55 (M235i) Engine, Transmission, Exhaust, Tuning My M235i: BMW M-Performance Exhaust & aFe Intake!

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      04-10-2014, 12:59 PM   #67
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Quote:
Originally Posted by red-sauerkraut
Quote:
Originally Posted by hyperboost
sounds good. BMW should make some blacked out tips!
They have CF instead
Do you have a part number?
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      04-10-2014, 01:10 PM   #68
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reminds me of a 335is with MPE but this one sounds better. At least from my earphones
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      04-10-2014, 01:34 PM   #69
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@eclaxton - I believe it is in the M-performance catalog for the M235i. However, it shows up as "TBD" so it doesn't seem like there is a solid part number for it yet. Once my exhaust was broken in coupled with the downpipe, it sounds WAY better than in the videos. Also, here is a link to the parts for future reference: http://www.2addicts.com/forums/showthread.php?t=965694

@Chunner - Its already obvious we both have different views on this and you're more concerned about intake air temperatures while I am looking for the ability to move a higher volume of air at higher boost. I already understand the air will be hotter and never doubted that. I've only stated that it will be potentially less hot than it can be with the heatshield and air duct still in place. But my view still stands, along with the bunch of boosted BMW dynosheets that the intake does make extra ponies with the hood up or down. If you are that into the IAT, you may check out the BMS website where they've done extensive testing on the "hot air myth" and made a thread about it with actual relevant data. If you want to solidify your beliefs, I suggest you do the same instead of just posting up a video from YouTube .

@secono330ci - Here's a dyno sheet of the BMS intake with the hood down. It doesn't look like it comes from only the hood up .

http://www.burgertuning.com/images/filterdyno.jpg

Last edited by JustinCredibleM; 04-10-2014 at 01:43 PM..
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      04-10-2014, 02:24 PM   #70
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From the Burger dyno sheet, hood down with filter get you 14HP or am I reading that wrong? While I believe you're likely to get a bit more power, 14HP seems like a lot just for a filter.
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      04-10-2014, 02:32 PM   #71
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Quote:
Originally Posted by TheBingoBalls View Post
From the Burger dyno sheet, hood down with filter get you 14HP or am I reading that wrong? While I believe you're likely to get a bit more power, 14HP seems like a lot just for a filter.
It seems about right, but the dyno sheet is from the N54, so I am unfamiliar with how potent that engine is. I am going to the dyno tomorrow, so I'll do some testing of my own and see what it pulls out with hood closed and opened.
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      04-10-2014, 02:53 PM   #72
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Quote:
Originally Posted by eclaxton
You got to pay to play...taking that risk is your choice.

All of my past n54, current wife's F30 N55 and my FBO N54 E82 first mod JB and intake. The BMS DCI has been proven to produce more HP over stock and even more coupled with a piggy back tune. Reliability has been a non issue for me.

Volume and air density is the concern. Air density is greater when cooled meaning more volume with less air. Air is less dense when heated meaning = More air flow to equal same volume. So if you can increase the flow you can overcome the density needed. You loose ambient density but gain volume to make up and surpass your initial baseline (stock). So if you increased the volume yes you can gain HP/TQ.

Lastly if members choose to mod they realize the risks involved, but the ROI is exhilarating and well worth the risk. Like I said you got to pay to play and if you don't want to pay then don't play. It's that simple.

BTW I'm an addict and proud of it, I couldn't imagine driving something else..hahaha

P.S. Nice sounding exhaust, mine comes in Monday!
This man speaks the truth.
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      04-10-2014, 03:23 PM   #73
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Looking and sounding good. Aftermarket quads won't be far away for this car. Akra doing anything yet?

Where does the mic plug in for interior play back
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      04-10-2014, 03:26 PM   #74
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sounds good!
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      04-10-2014, 09:06 PM   #75
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How much louder was the exhaust the first time you drove it after install?


It states 3rd quarter this yea for the CF tips. I wonder if they are caps or true resonated tips...
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      04-10-2014, 09:13 PM   #76
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Quote:
Originally Posted by eclaxton View Post
How much louder was the exhaust the first time you drove it after install?


It states 3rd quarter this yea for the CF tips. I wonder if they are caps or true resonated tips...
If I had to quantify it, then I am going to say its about 10% louder. Then after you break it in, then probably 15% louder. But besides getting louder, it also sounds deeper, which is nice. If you're in comfort mode and driving around town or highway, its almost identical to stock from inside the cabin (with windows up). Sport mode or windows down, you can hear more of a growl. Its not an obnoxious exhaust by any means and has zero drone going up hills. I kind of wish it was louder .
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      04-10-2014, 09:15 PM   #77
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My wife is stoked about hers coming in Monday. I can't wait myself!
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      04-10-2014, 10:12 PM   #78
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Quote:
Originally Posted by eclaxton View Post
My wife is stoked about hers coming in Monday. I can't wait myself!
That's awesome she's into the whole modding thing as well! Enjoy it in good health.
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      04-11-2014, 07:57 AM   #79
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Quote:
Originally Posted by JustinCredibleM View Post
If I had to quantify it, then I am going to say its about 10% louder. Then after you break it in, then probably 15% louder. But besides getting louder, it also sounds deeper, which is nice. If you're in comfort mode and driving around town or highway, its almost identical to stock from inside the cabin (with windows up). Sport mode or windows down, you can hear more of a growl. Its not an obnoxious exhaust by any means and has zero drone going up hills. I kind of wish it was louder .

Best M performance exhaust setup I have heard yet! Congrats Justin! Holy cow!!!


What affect would you say the downpipe has on the sound of the M performance exhaust (if any)? I am not very familiar with down pipes. Do they increase performance or enhance the sounds?
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      04-11-2014, 02:23 PM   #80
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@alpinweiss 335i - Thank you

The downpipe will enhance the performance since it removes the stock catalytic coverter. And since the stock CAT acts as a muffler, it makes it a 'bit louder and more aggressive sounding as well .
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      04-11-2014, 02:26 PM   #81
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Quote:
Originally Posted by JustinCredibleM View Post
If I had to quantify it, then I am going to say its about 10% louder. Then after you break it in, then probably 15% louder. But besides getting louder, it also sounds deeper, which is nice. If you're in comfort mode and driving around town or highway, its almost identical to stock from inside the cabin (with windows up). Sport mode or windows down, you can hear more of a growl. Its not an obnoxious exhaust by any means and has zero drone going up hills. I kind of wish it was louder .
love this post! im almost fully convinced to upgrade the exhaust now; would you mind taking a video from inside the cabin of the sound? i'm a little hesitant to pulling the trigger because you said you wish it was a bit louder, not sure if the 10-15% louder would make the difference im looking for.

i came from a g37 which had an amazing stock exhaust sound, inside and out, i do miss it :/
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      04-11-2014, 02:36 PM   #82
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Inside the cabin it's loud as well when getting on it and has a finely tuned sound. If you want even more sound you can go after the Downpipe which both of us have done, and that will give you angry aggressive sound whenever you want, and ECO mode silences it all away with a flick of a button. Which is a nice unintended feature.
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      04-11-2014, 03:10 PM   #83
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Carbon tips are just that, tips. They replace the chrome tips and are the same style as the m4.

They are available in uk but are about $600 for the pair and that's on top of the exhaust!
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      04-11-2014, 04:14 PM   #84
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Quote:
Originally Posted by cmkde
I just installed my M Performance exhaust as well, these videos just don't do it justice, once you get a couple hundred miles on it, it has a nice throaty exotic gargling sound. No overt droning when cruising and a nice pop when the car shifts, really underrated sound-wise in videos. BMW did a great job with the sound.
The PE was the first thing I added to my 2010 135i and love the sound. Great burble and snarl. Very slight performance increase. The PPK made a big difference in performance, pretty much the same feel as the M235i from what I could tell with one test drive of the 2.
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      04-11-2014, 05:00 PM   #85
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@riimiX - If you're looking for a video, I'll upload it for you .
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      04-11-2014, 05:02 PM   #86
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Updated first post with interior and exterior video!
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      04-12-2014, 08:51 AM   #87
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Quote:
Originally Posted by JustinCredibleM View Post
Updated first post with interior and exterior video!

THANKS!!
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      04-12-2014, 12:01 PM   #88
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BMW's cold air intake is already the best intake you can have. You might get better airflow by changing the air filter and thats about it. All the aftermarket claims are sucking hot air. It all results the same formula but with alot more behind the scene drama. Car sucks hot air ecu/sensors compensate, all resulting the same air/fuel mixture.

Unless you have a tune then you can adjust some settings

Anyways...who cares, it looks good and sounds good, enjoy it
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