1M, VSRF catless downpipes= zero difference..except

hot-j · 10-20-2015, 11:17 PM

The drone is HORRIBLE. Car has some type of aftermarket mid pipe. Like, I am afraid of getting pulled over where ever I go now. To add insult to injury, I don't feel any power gains from the butt dyno. Is this normal on the 1M?

milocher · 10-21-2015, 12:09 AM

The lack of butt dyno feeling may be due to the fact that the 1m already has highflow catted dps, but with the extreme drone I'm leaning more towards an improper install. I'd have a shop (if you're not comfortable) look over the work done and confirm a proper install.

hot-j · 10-21-2015, 12:29 AM

Just went for another drive. Drone is around 2k rpm. Butt dyno feels like upper rpm hp picked up a bit. I am a technician, so I know what I am doing for the most part.

I'll throw it back on the lift tomorrow and see if anything is touching, but I doubt it. Some Google ing leads me to believe this is a common problem.

sparkyblue · 10-21-2015, 02:26 AM

You won't necessarily feel any gains without adding a proper tune to that mix. Installing DP's just opens up the exhaust so the engine can breathe better. At best, it should help with spooling up the turbo's quicker.

Since you stated the car has aftermarket downpipes, they are most likely non-resonated and that's why you are getting so much rasp. Some people like that kind of loudness, for you that's not the case. Thus I'd recommend getting a set of mid-pipes that have resonators built into them. I like my Berk Resonated Midpipes.

hot-j · 10-21-2015, 12:39 PM

Car is on a cobb stage 1 aggressive tune, an waiting on an ic to change to stage 2.

milocher · 10-21-2015, 03:04 PM

I don't think you need an fmic to go to stage 2, it's only required for stage 2+.

Stage 1 = Stock
Stage 1+ = FMIC
Stage 2 = Downpipes
Stage 2+ = Downpipes + FMIC

mike@x-ph.com · 10-21-2015, 03:42 PM

Quote:

Originally Posted by hot-j

Car is on a cobb stage 1 aggressive tune, an waiting on an ic to change to stage 2.

Quote:

Originally Posted by milocher

I don't think you need an fmic to go to stage 2, it's only required for stage 2+.

Stage 1 = Stock
Stage 1+ = FMIC
Stage 2 = Downpipes
Stage 2+ = Downpipes + FMIC

Correct.
If you have a drone, it is probably a bad install / fitment which could also explain the lack in power

hot-j · 10-21-2015, 11:48 PM

Well, everything is fine. Nothing touching. Drone is coming from the axle back. 1800 to 2500 rpm, just as boost starts to build. I think the stock muffler is restricted , and that momentary back pressure is the culprit.

edisapimp · 10-22-2015, 10:23 AM

You should sell it.

darkrom · 10-22-2015, 03:50 PM

Figure out what midpipe you have and sell it. I have the VRSF catless downpipes and they sound very mild while cruising and an awesome roar under WOT with my maddad resonated mids.

hot-j · 10-22-2015, 10:48 PM

Its the mad dad.... with resonators.

ShocknAwe · 10-22-2015, 11:01 PM

Either you're really sensitive to drone, or something isn't quite right.

ImGone92 · 10-23-2015, 04:14 AM

From my experience, the dps give the n54 car a really nice exhaust note, but when I deleted secondaries it was awfull....the same done ur referring to at about 2k, I got that also. n54 powered vehicles have a more restricted exhaust, I would check to see it you have those secondaries in place, if not you need resonators.

Sam G · 10-23-2015, 09:04 AM

I have an n54 with catless downpipes, catless mids, standard resonator and back box (plus everything in my sig).
I got the mids done first with a map; no drone. Next were the catless downpipes and it does rasp between 2K- 2.3K. I already had IC etc at that stage and got another map to make the most of the downpipes. It made a big difference in torque and was noticeable on the road.
I can live with the rasp as the gains are worth it. I just try and stay above 2.5k when changing gear!

hot-j · 10-23-2015, 11:36 PM

I think I am going to try the Dinan axle back. From what it says on thier website, thier exhaust specificly deals with this issue. Waiting on my cobb to be refurbished to change the tune also. My experience is the exact same as the above post. Other than the rasp, it sounds much better, and after some upper rpm fun, I can definitely tell there is more hp.

B.M.W. · 10-29-2015, 12:26 AM

Wouldn't the catless N55 midpipe help more then a catless Downpipe on the 1M?
I don't know much about them, but sorry OP it sounds like it's not installed properly.

litebulb · 10-29-2015, 02:06 PM

I heard more 1M owners a switching to N54 mid pipes to help control the drone. I remember reading a thread where someone cut open their stock resonator and found it was just a y-pipe. I'm sure it would help if you upgrade to a aftermarket axle back.

jbarzelatto · 06-04-2020, 09:08 PM

Sorry to revive this, but can anyone confirm that the VRSF n54 decatted dp will work on a 1M? Iv asked ebay merchants, they say no, and VRSF webpage doesnt mention 1m on their list of fitments. But i found this thread. Any help?

https://www.vr-speed.com/vrsf-3-stai...-bmw-135i.html

If im finding the wrong one, can you point me on the right direction?

Jeef · 06-05-2020, 10:39 PM

yes it will work. it's essentially a 135i with a n54. just has the 1m wide look and the m suspension.

10-20-2015, 11:17 PM	#1
hot-j First Lieutenant 98 Rep 309 Posts Drives: 1M Join Date: Sep 2015 Location: Boston MA iTrader: (0)	1M, VSRF catless downpipes= zero difference..except The drone is HORRIBLE. Car has some type of aftermarket mid pipe. Like, I am afraid of getting pulled over where ever I go now. To add insult to injury, I don't feel any power gains from the butt dyno. Is this normal on the 1M?
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10-21-2015, 12:09 AM	#2
milocher Private 4 Rep 61 Posts Drives: 2009 135i Join Date: Feb 2013 Location: Calgary iTrader: (0)	The lack of butt dyno feeling may be due to the fact that the 1m already has highflow catted dps, but with the extreme drone I'm leaning more towards an improper install. I'd have a shop (if you're not comfortable) look over the work done and confirm a proper install.
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10-21-2015, 12:29 AM	#3
hot-j First Lieutenant 98 Rep 309 Posts Drives: 1M Join Date: Sep 2015 Location: Boston MA iTrader: (0)	Just went for another drive. Drone is around 2k rpm. Butt dyno feels like upper rpm hp picked up a bit. I am a technician, so I know what I am doing for the most part. I'll throw it back on the lift tomorrow and see if anything is touching, but I doubt it. Some Google ing leads me to believe this is a common problem.
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10-21-2015, 02:26 AM	#4
sparkyblue Captain 64 Rep 760 Posts Drives: E82 135i & F80 M3 Join Date: Jan 2011 Location: USA iTrader: (8) Garage List 2008 BMW 135i [0.00]	You won't necessarily feel any gains without adding a proper tune to that mix. Installing DP's just opens up the exhaust so the engine can breathe better. At best, it should help with spooling up the turbo's quicker. Since you stated the car has aftermarket downpipes, they are most likely non-resonated and that's why you are getting so much rasp. Some people like that kind of loudness, for you that's not the case. Thus I'd recommend getting a set of mid-pipes that have resonators built into them. I like my Berk Resonated Midpipes.
	Appreciate 0 Quote

10-21-2015, 12:39 PM	#5
hot-j First Lieutenant 98 Rep 309 Posts Drives: 1M Join Date: Sep 2015 Location: Boston MA iTrader: (0)	Car is on a cobb stage 1 aggressive tune, an waiting on an ic to change to stage 2.
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10-21-2015, 03:04 PM	#6
milocher Private 4 Rep 61 Posts Drives: 2009 135i Join Date: Feb 2013 Location: Calgary iTrader: (0)	I don't think you need an fmic to go to stage 2, it's only required for stage 2+. Stage 1 = Stock Stage 1+ = FMIC Stage 2 = Downpipes Stage 2+ = Downpipes + FMIC
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10-21-2015, 11:48 PM	#8
hot-j First Lieutenant 98 Rep 309 Posts Drives: 1M Join Date: Sep 2015 Location: Boston MA iTrader: (0)	Well, everything is fine. Nothing touching. Drone is coming from the axle back. 1800 to 2500 rpm, just as boost starts to build. I think the stock muffler is restricted , and that momentary back pressure is the culprit.
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10-22-2015, 10:23 AM	#9
edisapimp Civil Rights Activist 115 Rep 949 Posts Drives: E46 Sedan, E88 Vert Join Date: Apr 2013 Location: Long Island iTrader: (0)	You should sell it. __________________ E88 Crimson Red Vert MSport 6MT - Listing your mods in your signature is lame. BMS DCI/MHD E30 Flash!!/AA Sport FMIC/VRSF CP w Tial BOV/VRSF 3" DPs/550i clutch w SPEC SMFW/Apex EC-7s/Whiteline RSFB/E92 M3 FCAs/Bilstein B12 Pro Kit/VRSF inlets
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10-22-2015, 03:50 PM	#10
darkrom Colonel 188 Rep 2,224 Posts Drives: 135i Join Date: Feb 2011 Location: Rhode Island iTrader: (5)	Figure out what midpipe you have and sell it. I have the VRSF catless downpipes and they sound very mild while cruising and an awesome roar under WOT with my maddad resonated mids.
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10-22-2015, 10:48 PM	#11
hot-j First Lieutenant 98 Rep 309 Posts Drives: 1M Join Date: Sep 2015 Location: Boston MA iTrader: (0)	Its the mad dad.... with resonators.
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10-22-2015, 11:01 PM	#12
ShocknAwe 1Addict 3233 Rep 7,893 Posts Drives: E82 Mutt, M57 Truck Join Date: Jul 2012 Location: Charleston iTrader: (22)	Either you're really sensitive to drone, or something isn't quite right. __________________ 2010 135i 6MT Jet Black N54/3 FE82 Mutt \| BUILD THREAD \| GARAGE SALE
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10-23-2015, 04:14 AM	#13
ImGone92 Private 0 Rep 61 Posts Drives: N54 335i Join Date: Aug 2014 Location: Coral Springs iTrader: (0)	From my experience, the dps give the n54 car a really nice exhaust note, but when I deleted secondaries it was awfull....the same done ur referring to at about 2k, I got that also. n54 powered vehicles have a more restricted exhaust, I would check to see it you have those secondaries in place, if not you need resonators.
	Appreciate 0 Quote

10-23-2015, 09:04 AM	#14
Sam G Private 13 Rep 59 Posts Drives: 2008 135i Coupe Join Date: Sep 2014 Location: Somerset U.K. iTrader: (0)	I have an n54 with catless downpipes, catless mids, standard resonator and back box (plus everything in my sig). I got the mids done first with a map; no drone. Next were the catless downpipes and it does rasp between 2K- 2.3K. I already had IC etc at that stage and got another map to make the most of the downpipes. It made a big difference in torque and was noticeable on the road. I can live with the rasp as the gains are worth it. I just try and stay above 2.5k when changing gear! __________________ Hexis 30905M Vinyl Wrap / EBC Red Stuff Pads / Motul 600 / BMWP Short Shift / Modified CDV / K&N Panel Filter / Forge Re-Circ DV / Forge IC / BMS OCC / Intake Walnut Blast / VRSF Catless Ceramic Coated DP's / N55 Mids / SWICT Custom Re-Map with NLS + 2-Step / Yokohama V105S 225/255.
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10-23-2015, 11:36 PM	#15
hot-j First Lieutenant 98 Rep 309 Posts Drives: 1M Join Date: Sep 2015 Location: Boston MA iTrader: (0)	I think I am going to try the Dinan axle back. From what it says on thier website, thier exhaust specificly deals with this issue. Waiting on my cobb to be refurbished to change the tune also. My experience is the exact same as the above post. Other than the rasp, it sounds much better, and after some upper rpm fun, I can definitely tell there is more hp.
	Appreciate 0 Quote

10-29-2015, 12:26 AM	#16
B.M.W. Something Danger Zone 41 Rep 257 Posts Drives: 2009 335i E46 M3 Join Date: Nov 2014 Location: South Carolina iTrader: (0)	Wouldn't the catless N55 midpipe help more then a catless Downpipe on the 1M? I don't know much about them, but sorry OP it sounds like it's not installed properly.
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10-29-2015, 02:06 PM	#17
litebulb Captain 68 Rep 627 Posts Drives: '09 E88 135i M-Sport/6MT/SGM Join Date: Feb 2011 Location: Vancouver iTrader: (3) Garage List 2009 BMW 135i Cabri ... [10.00]	I heard more 1M owners a switching to N54 mid pipes to help control the drone. I remember reading a thread where someone cut open their stock resonator and found it was just a y-pipe. I'm sure it would help if you upgrade to a aftermarket axle back. __________________ \| Dinan S2=>MHD \| e46 M3 trans mounts \| Dinan CF CAI \| ER CP \| HKS SSQV4 BOV \| RB PCV Valve \| VRSF DP \| N55 MP \| BMW PE \| OC \| VRSF 7" FMIC \| UUC Evo3 SSK \| EBC GD Sport Rotors \| EBC Redstuff \| TRW F+R \| \| Whiteline KDT918 \| H&R Front Sway \| BMWP 313 \| MPSS 225/255 \| Scopione CF Rear Diffuser \| iCarbon CF Rear Spoiler \| P3 v2.1 Gauge \| Interior LED Retrofit \|
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06-04-2020, 09:08 PM	#18
jbarzelatto Second Lieutenant 26 Rep 228 Posts Drives: 2011 135i Lemans Join Date: Jul 2013 Location: Santiago, Chile iTrader: (0)	n54 vrsf dp on 1m Sorry to revive this, but can anyone confirm that the VRSF n54 decatted dp will work on a 1M? Iv asked ebay merchants, they say no, and VRSF webpage doesnt mention 1m on their list of fitments. But i found this thread. Any help? https://www.vr-speed.com/vrsf-3-stai...-bmw-135i.html If im finding the wrong one, can you point me on the right direction?
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06-05-2020, 10:39 PM	#19
Jeef Lieutenant Colonel 388 Rep 1,945 Posts Drives: AW E92 335i Join Date: Nov 2008 Location: San Diego, CA iTrader: (6)	yes it will work. it's essentially a 135i with a n54. just has the 1m wide look and the m suspension.
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