OEM Exhaust mod by Bimmersport Automotive

Jon@Bimmersport Automotive · 02-10-2012, 06:23 PM

Hello board,

We did the famous OEM Exhaust mod to M3post member "ROTURBO"s mint Mineral White E93 M3. I must say this modification sounds amazing, and exotic like. The installation can be done a few ways. Our method was similar to AUTOcouture's method except we did it slightly different.

Here are some pics to show how it happens:

IMG_3259 by bimmersport, on Flickr

IMG_3264 by bimmersport, on Flickr

IMG_3263 by bimmersport, on Flickr

IMG_3273 by bimmersport, on Flickr

IMG_3274 by bimmersport, on Flickr

IMG_3280 by bimmersport, on Flickr

IMG_3292 by bimmersport, on Flickr

I have a video clip, but it needs to be formatted properly. I will post it up shortly!

MDCTFTW · 02-10-2012, 06:32 PM

Whoa .... nice. Do post a vid.

alpine92m3 · 02-10-2012, 08:28 PM

Video??

tibra1 · 02-10-2012, 08:30 PM

Straight thru method..wow..thats gonna be loud..

biglare · 02-10-2012, 08:35 PM

Nice!

Ditto on some vids and sound clips!

Jon@Bimmersport Automotive · 02-10-2012, 08:52 PM

Guys, out of respect for the owners of the car I have requested their permission before posting. I cannot block their plates out of the video. As soon as they give me the OK I'll post it up.

mesropb23 · 02-10-2012, 10:03 PM

Isn't this basically the same result as a straight pipe?

Giccy · 02-10-2012, 10:14 PM

Been waiting for this! Excellent job. Jon, sign me up for the "other" OEM exhaust mod method.

(unless the owner wants to let me listen to his exhaust

)

Shoot me a pm with pricing details. Would like the mod to be done on the top section and have the can painted black.

tibra1 · 02-10-2012, 10:17 PM

Quote:

Originally Posted by mesropb23

Isn't this basically the same result as a straight pipe?

Pretty much..

Dellort_M3 · 02-11-2012, 01:20 AM

Quote:

Originally Posted by mesropb23

Isn't this basically the same result as a straight pipe?

Well pretty much, but only from xpipe back. If the car still has the oem xpipe and connecting pipes then it retains the stock cats which decreases the sound versus an actual straight pipe. A straight pipe, if Im not mistaken, is normally referred to when the exhaust is legitimately a straight pipe containing no cats, resonators or muffler.
This mod will no doubt be a lot louder than stock however as it bypasses the absorption chambers but still goes through the helmholtz chambers.

Jon@Bimmersport Automotive · 02-12-2012, 10:08 AM

This is a muffler bypass, it just goes straight from the resonator in the midsection to the tips...there is nothing done to the midsection or cats at all. We do not have a dyno in house, if any of the members would like to I can get something arranged. Power gains I can assume would be similar to any other free flowing muffler on the market, what the curve is like I do not know.

Giccy Gic - Let me know when your ready!

Enjoy the vid!

E93 on the left = RO_TURBO OEM Exhaust Mod
E90 on the right = AA Stage 2 w/AA Signature exhaust & secondary cat removal

Bluesummer · 02-12-2012, 10:26 AM

Since it's almost like a muffler delete... a dyno is needed, not to prove any increase of power but for the completely opposite reason instead.

jml · 02-12-2012, 11:46 AM

Quote:

Originally Posted by Bluesummer

Since it's almost like a muffler delete... a dyno is needed, not to prove any increase of power but for the completely opposite reason instead.

http://www.m3post.com/forums/showthread.php?t=617478

This thread has some pretty good data. The bypass is straight through. They found no concerning difference between bypass vs. a muffler.

TTSam · 02-12-2012, 11:53 AM

Quote:

Originally Posted by Jon@Bimmersport Automotive

This is a muffler bypass, it just goes straight from the resonator in the midsection to the tips...there is nothing done to the midsection or cats at all. We do not have a dyno in house, if any of the members would like to I can get something arranged. Power gains I can assume would be similar to any other free flowing muffler on the market, what the curve is like I do not know.

Giccy Gic - Let me know when your ready!

Enjoy the vid!

E93 on the left = RO_TURBO OEM Exhaust Mod
E90 on the right = AA Stage 2 w/AA Signature exhaust & secondary cat removal

Jon - can you PM me with a price?

Bluesummer · 02-12-2012, 01:56 PM

Quote:

Originally Posted by jml

http://www.m3post.com/forums/showthread.php?t=617478

This thread has some pretty good data. The bypass is straight through. They found no concerning difference between bypass vs. a muffler.

Thanks!!

tibra1 · 02-12-2012, 01:58 PM

Any videos longer than 8 seconds?..There are really no substantive videos out there showing the straight pass thru method..

Sal@Evolve · 02-12-2012, 02:07 PM

Quote:

Originally Posted by Bluesummer

Since it's almost like a muffler delete... a dyno is needed, not to prove any increase of power but for the completely opposite reason instead.

No need for a dyno.

We tested this type of setup (straight through) while developing the E-Tronic and it made zero difference to power. Tests included measuring back pressure through the whole exhaust, AFR and ignition timing delta's.

It all remained very consistent.

So, definately do not worry about power losses.

Reducing the ID of the pipework would lead to a power loss.

Increasing the size give no gain.

Hope that helps.

smihalik · 02-12-2012, 02:14 PM

Quote:

Originally Posted by Jon@Bimmersport Automotive

This is a muffler bypass, it just goes straight from the resonator in the midsection to the tips...there is nothing done to the midsection or cats at all. We do not have a dyno in house, if any of the members would like to I can get something arranged. Power gains I can assume would be similar to any other free flowing muffler on the market, what the curve is like I do not know.

Giccy Gic - Let me know when your ready!

Enjoy the vid!

E93 on the left = RO_TURBO OEM Exhaust Mod
E90 on the right = AA Stage 2 w/AA Signature exhaust & secondary cat removal

Aww man. I was sold on the perforated pipe method. Now I don't know. This sounds sick!

Beemw335 · 02-12-2012, 03:52 PM

This is pretty much a muffler delete, so hows the drone?

RO_Turbo · 02-13-2012, 12:00 AM

Quote:

Originally Posted by tibra1

Any videos longer than 8 seconds?..There are really no substantive videos out there showing the straight pass thru method..

Ill try to make a video soon and will post it on here.

RO_Turbo · 02-13-2012, 12:01 AM

Quote:

Originally Posted by Beemw335

This is pretty much a muffler delete, so hows the drone?

Drone has been neglible but ive only driven the car once since having the mod done so will post an update if there are any changes.

Jon@Bimmersport Automotive · 02-13-2012, 07:13 AM

Quote:

Originally Posted by Sal@Evolve

No need for a dyno.

We tested this type of setup (straight through) while developing the E-Tronic and it made zero difference to power. Tests included measuring back pressure through the whole exhaust, AFR and ignition timing delta's.

It all remained very consistent.

So, definately do not worry about power losses.

Reducing the ID of the pipework would lead to a power loss.

Increasing the size give no gain.

Hope that helps.

Thanks Sal, your thread was very informative (as well as the rest of R&D you guys do).

Just to clarify we have used the same piping from your exhaust do the mod so to sum it up this mod will add NO power nor will cause you to loose power.

02-10-2012, 06:23 PM	#1
Jon@Bimmersport Automotive First Lieutenant Drives: E46 M3 Active Supercharged Join Date: Jun 2008 Location: Mississauga, On Canada Posts: 340 iTrader: (0) Garage List 2003.5 BMW M3 [5.00]	OEM Exhaust mod by Bimmersport Automotive Hello board, We did the famous OEM Exhaust mod to M3post member "ROTURBO"s mint Mineral White E93 M3. I must say this modification sounds amazing, and exotic like. The installation can be done a few ways. Our method was similar to AUTOcouture's method except we did it slightly different. Here are some pics to show how it happens: IMG_3259 by bimmersport, on Flickr IMG_3264 by bimmersport, on Flickr IMG_3263 by bimmersport, on Flickr IMG_3273 by bimmersport, on Flickr IMG_3274 by bimmersport, on Flickr IMG_3280 by bimmersport, on Flickr IMG_3292 by bimmersport, on Flickr I have a video clip, but it needs to be formatted properly. I will post it up shortly!
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02-10-2012, 06:32 PM	#2
MDCTFTW Lieutenant Colonel Drives: E92 DCT Join Date: Apr 2008 Location: Norcal Posts: 1,975 iTrader: (0)	Whoa .... nice. Do post a vid. __________________ MDCT ... so you can drive and eat a hamburger at the same time.

02-10-2012, 08:35 PM	#5
biglare Bulldog Drives: X6M \| 1M \| SOLD E90 M3 VT2-625 Join Date: May 2008 Location: CA Posts: 2,723 iTrader: (3)	Nice! Ditto on some vids and sound clips! __________________ 1M ESS Stage 1+ Tune \| IND Grills - Sides \| Eisenmann Race \| HRE P43S \| KW V3 \| SOLD-M3 ESS VT2-625 \| IND/Challenge CF V-Weave Roof - LipSpoiler – BootLid – Diffuser - Mirrors - Brembo BBK Fiji-Green \| HRE P44SC \| MA Carbon – CF MatteSilver Trim \| Akra GT4 Mid-Pipe - Eisenmann Inconel \| 3.62Diff \| TopStitch Custom Interior \| KW Clubsport \| RD Sport Sways

02-10-2012, 08:52 PM	#6
Jon@Bimmersport Automotive First Lieutenant Drives: E46 M3 Active Supercharged Join Date: Jun 2008 Location: Mississauga, On Canada Posts: 340 iTrader: (0) Garage List 2003.5 BMW M3 [5.00]	Guys, out of respect for the owners of the car I have requested their permission before posting. I cannot block their plates out of the video. As soon as they give me the OK I'll post it up. Last edited by Jon@Bimmersport Automotive; 02-10-2012 at 08:59 PM.

02-10-2012, 10:03 PM	#7
mesropb23 Lieutenant Drives: E92 M3 Join Date: Oct 2008 Location: SoCal Posts: 591 iTrader: (6)	Isn't this basically the same result as a straight pipe? __________________ 2009 AW E92 M3

02-10-2012, 08:28 PM	#3
alpine92m3 if you want peace,prepare for war Drives: alpine white.. Join Date: Mar 2011 Location: pa Posts: 211 iTrader: (0)	Video??

02-10-2012, 08:30 PM	#4
tibra1 Banned Drives: 2011 ZCP M3 - 2007 335i crashd Join Date: Apr 2009 Location: NYC Posts: 6,779 iTrader: (4)	Straight thru method..wow..thats gonna be loud..

02-10-2012, 10:14 PM	#8
Giccy Captain Drives: like he has much to learn Join Date: Oct 2011 Location: Toronto Posts: 655 iTrader: (1)	Been waiting for this! Excellent job. Jon, sign me up for the "other" OEM exhaust mod method. (unless the owner wants to let me listen to his exhaust ) Shoot me a pm with pricing details. Would like the mod to be done on the top section and have the can painted black.

02-12-2012, 10:08 AM	#11
Jon@Bimmersport Automotive First Lieutenant Drives: E46 M3 Active Supercharged Join Date: Jun 2008 Location: Mississauga, On Canada Posts: 340 iTrader: (0) Garage List 2003.5 BMW M3 [5.00]	This is a muffler bypass, it just goes straight from the resonator in the midsection to the tips...there is nothing done to the midsection or cats at all. We do not have a dyno in house, if any of the members would like to I can get something arranged. Power gains I can assume would be similar to any other free flowing muffler on the market, what the curve is like I do not know. Giccy Gic - Let me know when your ready! Enjoy the vid! E93 on the left = RO_TURBO OEM Exhaust Mod E90 on the right = AA Stage 2 w/AA Signature exhaust & secondary cat removal Last edited by Jon@Bimmersport Automotive; 02-12-2012 at 10:49 AM.

02-12-2012, 10:26 AM	#12
Bluesummer Lieutenant General Drives: slower than Ayrton Senna Join Date: Dec 2006 Location: Nürburgring, be there once, your heart, your soul will stay there. Posts: 15,310 iTrader: (13) Garage List 2011 E82 135 [0.00] 2011 M3 [0.00] 2007 335 [0.00]	Since it's almost like a muffler delete... a dyno is needed, not to prove any increase of power but for the completely opposite reason instead. __________________ R.I.P. Steve Noh

02-12-2012, 01:58 PM	#16
tibra1 Banned Drives: 2011 ZCP M3 - 2007 335i crashd Join Date: Apr 2009 Location: NYC Posts: 6,779 iTrader: (4)	Any videos longer than 8 seconds?..There are really no substantive videos out there showing the straight pass thru method..

02-12-2012, 03:52 PM	#19
Beemw335 Lieutenant Colonel Drives: 335i Join Date: Mar 2011 Location: My car is my home Posts: 1,980 iTrader: (2)	This is pretty much a muffler delete, so hows the drone?

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