want 2 take off the muffler n just tell a shop 2 do 2 str8 pipes with no muffler

[II Knucklez II]

i went to the meet and i ended up seeing those two guys that are on youtube http://www.youtube.com/watch?v=YWtOm92bjRg

and one guys (red one)had a 2.5 with the muffler off and just had a shop put two pipes (looking like a y pipe but where the stock muffler is) str8 back and it sounded so mean omg like a lil to loud. he told me it was only $80 and i'm kinda tight on cash so i have been thinking about doing this u know until i have money for my greddy.heres the thing some ppl tell me to do it and it doesnt harm the car at all and other ppl tell me that i shouldnt do it cause it will harm the car. what do u guys know about this

[Rmuth25]

I'm no mechanic, however I don't see a reason as to why not having a muffler would hurt the car. However, keep it a secret if you are friends with any greenies, because I think a muffler does help lower carbon emissions and obviously lower the volume.Just as an opinion, any car that I have ever heard without a muffler just reminds me of a dumptruck. Maybe the 2.5 a/c is different though.

[II Knucklez II]

ya thats what i thought and as for the carbon emissions, here in FL we dont any law on carbon emissions, only thing they might get me for is being to loud and disterbing the peace(i know its gay but i have heard ppl getting tickets for being way to loud)and it sounds nice if u watch the video of the red one passing by.

any one else have some info?
Modified by II Knucklez II at 8:28 PM 2/18/2009

[Hussain]

lol ya i can tell you right now that the 3.5 with no muffler would be too crazy.... ill tell you what though, you can get it for FREE if you really want..... get under the car with a torque wrench or a air gun (the bolt is REALLY HARD TO GET OFF). right after the cat there should be 2 bolts, unbolt them and pry it apart with a flat head screw driver and there you go, straight piped.... do that before you decide to do all the piping.... if you dont feel its too loud for daily driving (which you will) then go ahead and do it..... only no muffler system i'd even consider on the 3.5se is with a resonator...... i have an electronic exhaust cut-out which makes my car waaaaaay to damn loud when i hit the switch and my car was even louder when i'd unbolt the muffler.... heres a couple vids of my electronic exhaust cut-out (it sounds much louder and better in person)

http://www.youtube.com/watch?v=ihzZV5YbZBE

http://www.youtube.com/watch?v=i6NSkrm-HtU

i have a switch to open it up or close it when ever i want from inside the car

[BlackMamba08]

are you trying to do this for the sound or the performance increase? if you want the sound, it's going to be really loud but there will be a performance gain.

[DroptopDrifting]

wow do you guys have even the slightest clue as to what you're talking about? no one here reads or even searches this forum?

what size exhaust are you looking to get? you can have the shop do a 2.5" straightpipe, no cat, to an 18" resonator to w/e muffler you want, you can even find em on ebay. if you do dual tips, dont go bigger than 2.25" outlets, single dont do higher than 2.5" outlet, otherwise itll just be ricey and annoying. if you didnt even have the v6 i'd tell you not to even get an exhaust, but since it is one, you'll see some performance gains....some. any custom piping shop can do that exhaust for you. i recommend getting headers as well. and not ebay ones, they're usually bad welds. have fun.

oh yeah, and cops will pull you over and give you tickets. fact.

[Hussain]

oh yeah, and cops will pull you over and give you tickets. fact.

not if you have an electronic exhaust cut-out and can make it silent by hitting a switch in the car when you see a cop no muffler made me .5 secs quicker so you'll notice a performance gain for sure..... but i recommend unbolting those 2 bolts to get a sense of how loud it really is and from there you can decide to go through with it or not

[KIth_Shift]

yea i tried this out, its so damn loud it rattles everything in my car but it sounds waaay nice from the outside. only thing is ur ears will start to bleed if u drive with this daily.

[DroptopDrifting]

not if you have an electronic exhaust cut-out and can make it silent by hitting a switch in the car when you see a cop no muffler made me .5 secs quicker so you'll notice a performance gain for sure..... but i recommend unbolting those 2 bolts to get a sense of how loud it really is and from there you can decide to go through with it or not

it's the wider piping that made the small performance gain, not the fact it has no muffler. turbo mufflers aka $60 ebay mufflers have no chambers in them, its just a can to change the sound of your exhaust. the only cars that sound decent with no muffler and just a straight pipe is if your car has f/i and a 3" downpipe. the point of the no chamber muffler is to make it sound crisper, and the point of a resonator is to make it sound deeper.and yeah, if you spend extra money on the valve to cut the sound, you can get away with it being pretty quiet so you wont get tickets. but this op was askin about doin an extremely cheap custom exhaust.

[II Knucklez II]

around how much would it be to get the valve cut off and with that in place, i can still have the pipeing to the two exhaust outlets right? cause i see Hussian with no pipeing to the exhaust outlet. and if i just get the pipeing str8 back with nothing there and i drive by a cop going slow (6MT: taking it to 2,500rmp) u think they would care becasue i think it wouldnt be to loud.

[LinkNuc]

Drive through my neighborhood with that shiat and I'll chase you down with my 3.5 give you a noogie, pull your pants up for you, straighten your hat, then pat ya on the back and say "there ya go sonny".

[mcheddadi]

yea i tried this out, its so damn loud it rattles everything in my car but it sounds waaay nice from the outside. only thing is ur ears will start to bleed if u drive with this daily.

[Hussain]

anything above idle and you'll get in trouble for sure..... i set the cruise control at 55 MPH and had the RPMs down low and the car was so loud that me and my friend couldnt even hear each other in the car yelling to each other....

i got exhaust on my car also and when i put the magnaflow muffler i just had the piping painted black to look stealthy but really it just looks stupid so ill get tips for it when i get a chance....

with the electronic exhaust cut-out (the valve thing), you can keep your whole stock exhaust set-up so it will sound 100% stock until you hit the switch in the car..... the electronic exhaust cut-out cost me $171 shipped to my door and the shop charged $60 to install it (you can get it cheaper if your shop was going to do the whole straight pipe set-up for $80).

[mrodrig2]

it's the wider piping that made the small performance gain, not the fact it has no muffler. turbo mufflers aka $60 ebay mufflers have no chambers in them, its just a can to change the sound of your exhaust. the only cars that sound decent with no muffler and just a straight pipe is if your car has f/i and a 3" downpipe. the point of the no chamber muffler is to make it sound crisper, and the point of a resonator is to make it sound deeper.and yeah, if you spend extra money on the valve to cut the sound, you can get away with it being pretty quiet so you wont get tickets. but this op was askin about doin an extremely cheap custom exhaust.

This is not entirely true. Mufflers quiet your exhaust sound through vibration reduction/resonation and also through airflow restriction. Removing your muffler can result in small performance gains by contributing (albeit very little) to weight reduction and less exhaust restriction.

Secondly, the point of a resonator is not to make your exhaust sound deeper. A resonator has a few effects. 1, it causes destructive interference of some sound waves to reduce overall exhaust noise; 2, it changes the resonant frequency of the exhaust system thereby changing the exhaust tone; 3, it can be tuned to aid in exhaust flow out from the engine.

[maxentropy]

Anyone who wants this either has a fetish with lots of vibration or is simply an attention whore.

I am neither of the two, hence my feelings that this is the most stupid modification you could make to your car.

[dldjros69]

simply an attention whore.

I am neither of the two

please brotha

[maxentropy]

Ok, ok fair enough...

I am attention whore in real life but my AC is not-- it's skeek, sexy, and beautiful but not 34532532dB and screaming look at me my car is really f*%@#$ing loud.

[dldjros69]

Honesty at it's best.

True that, Me/u attention hoes in real life.

But the A/C needs to fly under the radar.

Dang we all r so lucky 2 have such a classy lookin car.

[mcheddadi]

check out the mad sound from my straight pipe with open headers on my 3.7L bored VQ http://www.youtube.com/watch?v=xqrARAp2e18

106dB(A) SPL at 6 kilometers radius, cuz I'm fly like that

[DroptopDrifting]

"This is not entirely true. Mufflers quiet your exhaust sound through vibration reduction/resonation and also through airflow restriction. Removing your muffler can result in small performance gains by contributing (albeit very little) to weight reduction and less exhaust restriction.

Secondly, the point of a resonator is not to make your exhaust sound deeper. A resonator has a few effects. 1, it causes destructive interference of some sound waves to reduce overall exhaust noise; 2, it changes the resonant frequency of the exhaust system thereby changing the exhaust tone; 3, it can be tuned to aid in exhaust flow out from the engine."

mrodrig2: a "turbo" muffler, or most of which you find on ebay, basically any muffler unless otherwise noted, has no chambers. all it does is just change the frequency of the noise and look nice. a stock muffler, or if you buy one, has one or two chambers depending, and the chambers reduce gas flow, therefore adding backpressure and reducing possible hp gain. there is no airflow restriction in an open muffler.

yes, the resonator reduces noise a little, but for the most part just "changes the resonant frequency". your words just backed up mine. and the tone it tends to change to is a deeper tone. which is what i said. and no, they cant be tuned to aid in the exhaust flow, because if you take out the little balls inside them, it no longer "resonates" it just acts as a test pipe. like a "gutted cat". in a gutted cat situation, the cat is wiped clean of its inside chambers and it also acts as a test pipe. it no longer reduces emissions.

[mrodrig2]

didn't notice that your original post specified a straight through muffler, i see that now.

there is a balance between amount of backpressure and the point where it helps and hurts. does anyone really know what point the car is at with the stock muffler? probably not. an unrestricted exhaust of the same weight as stock may or may not have any power gains.

not sure who is talking about gutting anything. I was just defining a resonator. and yes the resonance vibration can aid exhaust escaping from the combustion chamber, not necessarily anywhere else further down the exhaust piping.

[Hussain]

i took my car to the track a few times to get numbers and see what set-up worked best.... my results were 14.4 stock, 14.2 with a muffler and 2.5" piping with no cat, and a 13.912 with no muffler at all. my times might be better then other peoples due to the fact that my area has almost no humidity, it was a cold day every time i went, AND my elevation is pretty much sea level (i think like 10-20 ft above) which means pretty much the best conditions for racing you'll ever find.... theres supposed to be SOME back pressure for best times BUT with my experiences with the 3.5se altima coupe, the less restricted the faster you go

[LinkNuc]

(See above post)...what is sort of acceptable on a 1/2 ton truck is ultra-super-douchebaggie on a 4 banger...

max I agree, have a great party and try and talk some sense into these people

[DroptopDrifting]

if you use a 2 chamber muffler, or a muffler with smaller in/out of 2.5/2.5 then you'll gain backpressure compared to running open straight pipe. so yes, you should have a better time, but it shouldn't be more than tenths of a second. i assume you just drove better your last time down the track. what was your reaction time, 1/8 mile, etc? probably had a better launch and shifted faster. post some time slips, i'd be interested to see.

[Hussain]

ok so i looked at my billion time slips and sorted through them and theres so many from different days and i couldnt find the time slips from when i ran a 14.2 with my magnaflow muffler and no cat but i have the times from when i was stock and from when i ran with no muffler

STOCKreaction: .18460ft: 2.3111/8 mile: sensor was brokenMPH: sensor was broken1/4 mile: 14.475MPH: 96.888

i have 2 good time slips from when i ran with no muffler

first NO MUFFLER

reaction: .09760ft: 2.9161/8 mile: 9.004MPH: 80.3711/4 mile: 13.927mph: 99.436

2nd NO MUFFLERreaction: .25260ft: 2.1691/8 mile: 8.992MPH: 80.2891/4 mile: 13.912mph: 99.757

funny thing is, my best 1/4 mile time had the worst reaction time of the night lol my best reaction time of the night was .069 secs..... also, ive never been able to trap 100 MPH... one day i will tho lol after a ECU tune probably

heres a vid of my warm up runs racing my friend's silver SRT-4 (after the EVO run)

http://www.youtube.com/watch?v=O0P2e-uyj-Y

[Hussain]

its weird, looking at the times you see that with no muffler my 60ft even got better... i guess because less back pressure means less down low power so i dont spin as much off the line and then up high in the RPMs i get more power and with CVT never shifting gears, the up high power really out weighs the down low power's loss.... idk, one of my 13.9 runs i screwed up the launch and got a bad 60ft..... not really trying to thread jack but just showing how no muffler will really help with performance and isnt just for show like some people are saying

[DroptopDrifting]

get a kinetix intake manifold, and a cattman header and y-pipe to go with that exhaust. not only will your engine bay look sweet but you'll prob knock a full second off your 1/4 mile time with a good tune.

http://www.kinetixracing.com/n....aspx

[DroptopDrifting]

and to the no muffler thing......once again, you never answered. did you have a 2 chamber muffler? or was it open? and if its smaller than 2.5"in/2.5"out itll also cause restriction. but if you get an open muffler that's sized right, it shouldn't be any different in performance.

[ItsEcko06]

ok i'ma be honest i kinda skipped a lot of every1s post but i read the first one and a few under.

i had my muffler removed maybe a month ago and i've been meaning to post up pics and a clip but i'm lazy. i figured some of you 2.5ers might be interested to hear it incase you don't wanna try it.

anyway heres a pic:got it done for 110 i think at my local muffler shop. they do good work for any ppl here in houston interested.

heres a link to my crappy myspace vid:http://vids.myspace.com/index....17229The description says alot.

[Hussain]

i want an intake manifold and headers BUT they dont make any... that intake manifold was for 2002-2006 altimas.... no headers or intake manifold for the coupes yet.... about my muffler, honestly i have no idea, all i know is that its a transversal Magnaflow muffler.... heres a pic of it