Removed Rear Muffler

6spdMSport · 09-23-2009, 11:32 AM

Well yesterday when i had the car up on the lift doing the suspension, i though i should try taking the muffler off to see how it went(either way i had to in order to get the left shock bolt out). I put the car down from the lift and i went around the block and i love my new suspension, but then when i got on the gas the car with the muffler off felt like a new beast, its not even loud. The day before that i had put in the BMS DCI and the BMS JB3 with the 1.4Beta and it was a monster. Taking the muffler off really woke the car up even more. What are the negatives of this ?

OM3G@ · 09-25-2009, 07:37 AM

I don't know about adverse effects but I would like to see some pics and hear some sound clips if possible.

spedgm · 09-25-2009, 08:02 AM

+1 man ive been thinking about doing this out of pure curiousity.

marconi118 · 09-25-2009, 08:33 AM

E92 or E90 ?
E90/91 has intermediate resonator that dims the sound

JayKay335i · 09-25-2009, 09:22 AM

Those things are HEAVY!

CubanJJ09 · 09-25-2009, 10:05 AM

drone was my problem when i took it off of my 335. other than that nothing. unless its so loud u attract po po

tinnsoldaten · 09-25-2009, 10:16 AM

I replaced all my exhaust parts with stainless , RR catted DPs , RR mid pipes (rear cat delete) , supersprint x-section and Remus quad mufflers ...

When making the supersprint ready for fitting I also drove a bit without anything from midpipes and midpipes and x-section with out anything else but pipes ... sound horrible with just the midpipes , to noisy and loss of torque , with the x-section added it was a different story less tractor sound and quite fun to drive you feel it at the end of the RPM really strong. But now I got it all fitted , the remus quads have a nice 60% less backpressure on exhaust and you need some of that to get that low RPM torque .

luca335i · 09-25-2009, 12:31 PM

There is no loss of torque with a straight pipe with the n54

midlife · 09-25-2009, 12:45 PM

OP you had put the JB3 in only a day earlier - it is probably still adapting hence the huge performance difference.

Jonny550 · 09-25-2009, 12:52 PM

Quote:

Originally Posted by CubanJJ09

drone was my problem when i took it off of my 335. other than that nothing. unless its so loud u attract po po

Yes the police are a problem i got pulled over on i95 and i know it was because of my exhaust .....maybe the montego "pull me over" blue didnt help lol.I thought my car was a freak when i cut the muffs off but i think its the sound that makes the driving experience more fun.My uncle just cut his mufflers off a C6 ls2 and we lost like 3whp but the car feels faster lol.

CubanJJ09 · 09-25-2009, 12:55 PM

Quote:

Originally Posted by Jon335iFL

Yes the police are a problem i got pulled over on i95 and i know it was because of my exhaust .....maybe the montego "pull me over" blue didnt help lol.I thought my car was a freak when i cut the muffs off but i think its the sound that makes the driving experience more fun.My uncle just cut his mufflers off a C6 ls2 and we lost like 3whp but the car feels faster lol.

the 335i without the mufflers is fun. i can see that for a track day but def. not all the time. and that ls2 must have made u bleed from the ears

09-23-2009, 11:32 AM	#1
6spdMSport Private 5 Rep 94 Posts Drives: Jet Black 135i Sport/USB/iPod Join Date: Aug 2009 Location: 727 iTrader: (-2)	Removed Rear Muffler Well yesterday when i had the car up on the lift doing the suspension, i though i should try taking the muffler off to see how it went(either way i had to in order to get the left shock bolt out). I put the car down from the lift and i went around the block and i love my new suspension, but then when i got on the gas the car with the muffler off felt like a new beast, its not even loud. The day before that i had put in the BMS DCI and the BMS JB3 with the 1.4Beta and it was a monster. Taking the muffler off really woke the car up even more. What are the negatives of this ? __________________ 09 Jet Black 135i /// M-Sport BMS DCI /// JB3 2.0 /// AA Chargepipe & BOV /// AA FMIC /// VK Downpipes /// H&R Super-Sports /// SpunTek Custom Piping/// Miami Muffler Custom Cat-Back(Straight Pipe)/// BMS CDV/// Carbon Fiber Grills/// DEFI Boost Gauge
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09-25-2009, 07:37 AM	#2
OM3G@ Private 10 Rep 93 Posts Drives: '09 AW 335i sedan Join Date: Jun 2009 Location: O'Fallon, IL iTrader: (0)	I don't know about adverse effects but I would like to see some pics and hear some sound clips if possible. __________________ '09 AW e90 335i w/steering wheel, gas pedal, seatbelts, windshield, and much more!
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09-25-2009, 08:02 AM	#3
spedgm New Member 2 Rep 13 Posts Drives: 08 E92 BMW 335I Join Date: Nov 2008 Location: Germany iTrader: (0) Garage List 2008 E92 335i [0.00]	+1 man ive been thinking about doing this out of pure curiousity. __________________ 08' E92 335i, montego blue, sport pkg, navi, logic 7, CF trim, BMW Perf wheel, SSK, anthrecite head liner. Soon to come: VRS csl deck lid&hood, CF roof w/ sun roof, M6 or CLS time attacks, black trim.
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09-25-2009, 08:33 AM	#4
marconi118 Major 94 Rep 1,184 Posts Drives: 06/07 e93 335i Join Date: Nov 2008 Location: europe iTrader: (0)	E92 or E90 ? E90/91 has intermediate resonator that dims the sound
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09-25-2009, 09:22 AM	#5
JayKay335i Banned 189 Rep 5,046 Posts Drives: ///M323 DCT Join Date: Apr 2009 Location: North Dakota; its best DUHHHHHH iTrader: (1)	Those things are HEAVY!
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09-25-2009, 10:05 AM	#6
CubanJJ09 Banned 169 Rep 12,680 Posts Drives: like an asshole Join Date: Feb 2008 Location: Chicago Burbs iTrader: (2) Garage List 2007 BMW 335i [6.18]	drone was my problem when i took it off of my 335. other than that nothing. unless its so loud u attract po po
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09-25-2009, 10:16 AM	#7
tinnsoldaten Captain 34 Rep 715 Posts Drives: e92 335i coupe Join Date: Dec 2008 Location: Bergen iTrader: (1)	I replaced all my exhaust parts with stainless , RR catted DPs , RR mid pipes (rear cat delete) , supersprint x-section and Remus quad mufflers ... When making the supersprint ready for fitting I also drove a bit without anything from midpipes and midpipes and x-section with out anything else but pipes ... sound horrible with just the midpipes , to noisy and loss of torque , with the x-section added it was a different story less tractor sound and quite fun to drive you feel it at the end of the RPM really strong. But now I got it all fitted , the remus quads have a nice 60% less backpressure on exhaust and you need some of that to get that low RPM torque .
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09-25-2009, 12:31 PM	#8
luca335i Major 57 Rep 1,193 Posts Drives: 335I Sedan Join Date: Jan 2008 Location: Unknown iTrader: (3)	There is no loss of torque with a straight pipe with the n54 __________________
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09-25-2009, 12:45 PM	#9
midlife ocasionally in crisis 52 Rep 2,358 Posts Drives: '08 335i cabrio Join Date: Jun 2007 Location: .......... iTrader: (0)	OP you had put the JB3 in only a day earlier - it is probably still adapting hence the huge performance difference. __________________ If your car isn't scary - it's just not fast enough ! RPI IC / UR catless DPs / JB3 2.0 beta / UR CAI / Quaife LSD / Snow Methanol Injection / VK oil cooler upgrade / Forge DVs / M3 rear sway / Riss catch can / Paddle shifting 6AT / M Sport steering wheel / Logic 7 / Dunlop Direzza Z1 255/235 /
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