Modifying exhaust to be quieter??

[nissandr1ft]

Well I know with the N/A KA my exhaust won't ever be quiet as long as it's 3", but Id like to see whats available. I'd like to just throw in a turbo to help quiet it down, but lack funds keep me from doing that in the near future. Currently I'm running a 4-2-1 header, catco 3", SSA Single 3" w/Magnaflow 4"x14" resonator (14419) welded in. I'm thinking of replacing the 4" resonator with the 4"x9" Magnaflow muffler (14319) to either go inline or replace the resonator. Another option I've been looking into would be getting another muffler to replace the SSA that came on it. My car sits pretty low, and I've already done some work on the piping to raise it a bit. My new job puts me on around a 40 minute commute each way, and I want less droning on the interstate. Should I just go ahead, and get something else, or work with what I have? Suggestions on mufflers that will help get rid of rasp, noise, and droning noises?

Car for reference...
http://i77.photobucket.com/albums/j43/nissandrift/NewWheels253.jpg

[Matej]

If the 240 is your only mode of transportation, you should just save up for a cheap daily commuter car for work and keep the 240 for fun.

[Addicted2Kouki]

Suggestions on mufflers that will help get rid of rasp, noise, and droning noises?

Car for reference...


welding in a muffler in place of a resonator would be stupid, especially for turbo.

if you want it to quiet down... just put in more resonators... or switch out the exhaust.

maybe stock with bigger piping.


what was the point of getting an exhaust especially an SSAC fartcan when you are trying to avoid... rasp, noise, and droning noises.

[firelizard]

Got room for an 18" resonator?

Or yeah, like you said, another muffler....

Sounds like you might as well just go back to stock though if you're thinking of that.

Or, if you really need to keep the 3" for performance (I dunno, seems big for N/A 2.4L to me, but I'm not an expert), try laying down more sound deadening material. They make some spray on stuff that you could coat your floor with, then cover with eDead or equiv.

[ThatGuy]

Ditch the SSAutocrap canister muffler and add a Magnaflow or similar muffler with custom tips. That combined with the resonator will help.

With the header and 3" piping it will never be "quiet" again. But you can make it more tolerable.

BTW, firelizard, N/A KAs LOVE 3" piping.

[kingyogi]

wana part with your wheels?

need somethin like that for the drag strip.
Thanks in advanced

[nissandr1ft]

Well my past jobs never had me at more than a 10 minute drive, and I've lived with it for the past 3yrs. All the mufflers/resonators Im looking at are perforated/straight thru so they don't kill velocity to bad. I'm thinking about this muffler to replace the SSA muffler...http://www.magnaflow.com/02product/shopexd.asp?zone=main&id=793. I have the SSA exhaust because it was free... one friend had the front half, and another had the rear half.

[Bubba]

I actually think that may help out a lil bit, not too much though. I also think it will look better than the SSautoCrap setup that is on their now. Measure the can that is on the back and see if you will need to add or remove some of the piping to make it fit, you don't want it hanging way past the rear bumper like some cheap Honduh exhaust.

[02BRB20]

silencer????

[ThatGuy]

silencer????

Nothing makes more sense then a header, high flow cat, 3" piping...

...and then constricting it all down to a 1" hole in a silencer. :duh:

[bram StRoker]

i thinks it hilarious that u said put an exhaust on it to quiet the car down. if thats the case i want your life:D

[firelizard]

BTW, firelizard, N/A KAs LOVE 3" piping.
Very good to know!

In that case, I would stick with just extra sound deadening.

[nissandr1ft]

Well I'm not talking back to OEM quiet, and realistically I know it won't. It just seems that even all my N/A KA friends cars are quieter than mine. I'm going to be foaming the chassis with (http://www.grainger.com/Grainger/wwg/itemDetailsRender.shtml?ItemId=1611574493), and putting paint on bed liner (http://www.protectakote.co.uk/kits.htm) in the trunk which will hopefully help a bit.

[BigCrash]

You might look into this. I've run them on a few of my cars to keep the noise down.

http://www.apexi-usa.com/product_exhaust_detail.asp?id=251&pageNum=1

[murda-c]

You should stick a silencer in the tip.

take it out when you aren't commuting and you want it to be loud.

[nissandr1ft]

I have a silencer, but with the SSA one it tends to rattle at idle, and whistle if Im on the gas. Theres only room for the one seal silencer, where as the double walled kind tend to work fine. It annoyed me because I don't always feel like getting out of the car to pull out the silencer, and even then a lot of local tracks have a DB limit that I may need to worry about in the future.

[02BRB20]

Nothing makes more sense then a header, high flow cat, 3" piping...

...and then constricting it all down to a 1" hole in a silencer. :duh:

beats the hell out of welding and cutting and modifying the exhaust he already has. Pop a silencer in, bam problem solved.

what does performance matter when your DD'ing on the highway hoping cops dont hear your exhaust.

[ThatGuy]

Because you can have both. Performance and not an annoying, raspy drone. You just have to buy or piece together a decent exhaust.

If you're going to do it, do it right. Silencers are like "Band-aids". They don't really fix the problem.

[nissandr1ft]

The apexi exhaust control valve may be the worst case scenario, but I want to try other paths first. The way that valve is sitting I can see that not opening 100% all the time, and killing velocity. Are there any suggestions on mufflers to check out? Will an oval muffler muffle more than a round one? Any suggestions on ones to check out? The one I posted the link of a few posts up is 5x8 w/ 7" tip which seems relatively similar to my current one. I'm thinking it'd be easier to fit a round muffler over oval though since my piping runs out at an angle. Any suggestions on ones to try out? Any other resonators to try out over the current one... before I cut it up, and raised it the resonator hit the ground a few times (looks like it may leak in the near future).

[firelizard]

What about an A'PEXi WS2?

I haven't installed mine yet, but I hear they're supposed to be very quiet.

Turbo version is 3" isn't it?

[nissandr1ft]

What about an A'PEXi WS2?

I haven't installed mine yet, but I hear they're supposed to be very quiet.

Turbo version is 3" isn't it?

Do you have any dimensional sizes of the muffler? I cant seem to find any info, but it looks like Id have to modify my piping quite a bit to run it straight out.

[02BRB20]

If you're going to do it, do it right. Silencers are like "Band-aids". They don't really fix the problem.

ok, but he already did. I agree that you do it right the first time around but the OP already has an exhaust. Get a silencer, pop it in, bang problem solved.

Oh, and I didnt know band-aids didnt work? Guess I should take off the one thats on my cut finger. :confused:

[ThatGuy]

They don't fix the cut. :D

[S14DB]

3" all the way thru. 14-18" resonator and the bigest 3" OVAL muffler you can fit.

I have seen on the dyno more HP and TQ with a 3" than a 2.5". Intake, header, resonated test pipe, 14" resonator and a huge oval can.

[unicoladron]

i thinks it hilarious that u said put an exhaust on it to quiet the car down. if thats the case i want your life:D

i think you meant to rip on him because he said "I'd like to just throw in a turbo to help quiet it down". I know what he means by that, because NA tends to be more raspy than turbo. poor attempt at flaming.

but yes, straight through fart cans are raspy. if you choose to retro-fit with that magnaflow muffler, it will definitely make you happer, and provide a nicer tone since you already have a resonator. Magnaflow exhausts are easily sourced, and are relatively cheap.

[fliprayzin240sx]

The apexi exhaust control valve may be the worst case scenario, but I want to try other paths first. The way that valve is sitting I can see that not opening 100% all the time, and killing velocity. Are there any suggestions on mufflers to check out? Will an oval muffler muffle more than a round one? Any suggestions on ones to check out? The one I posted the link of a few posts up is 5x8 w/ 7" tip which seems relatively similar to my current one. I'm thinking it'd be easier to fit a round muffler over oval though since my piping runs out at an angle. Any suggestions on ones to try out? Any other resonators to try out over the current one... before I cut it up, and raised it the resonator hit the ground a few times (looks like it may leak in the near future).

ECV killing velocity??? Are you shitting me? If the 600-800 hp skyline guys here uses it, what makes you think it wouldnt be a good idea on a NA KA??? How much power do you think your gonna loose with this thing, that adding a resonator wouldnt do??? :jerkit:

Here's a good demo: RB26 + 90mm + Un-Muffled canister = worse than fencepipes on an SR

http://www.youtube.com/watch?v=wV3iOml9s1g

[nissandrift]

Just because a 900hp car has the ECV doesnt mean that it didnt lose horsepower installing it... who knows he may have had 950 without it. I'm just saying that if my 3" exhaust doesnt match the 80mm housing very well, or the valve doesnt open up parallel to the path that the exhaust travels it could hurt velocity. I was careful when I ordered the resonator to find one that didnt have the scoops, but just perforated holes which shouldn't hurt power to much. Either way, N/A to me means that I don't have much to sacrifice in the power department.

[nissandr1ft]

Just because a 900hp car has the ECV doesnt mean that it didnt lose horsepower installing it... who knows he may have had 950 without it. I'm just saying that if my 3" exhaust doesnt match the 80mm housing very well, or the valve doesnt open up parallel to the path that the exhaust travels it could hurt velocity. I was careful when I ordered the resonator to find one that didnt have the scoops, but just perforated holes which shouldn't hurt power to much. Either way, N/A to me means that I don't have much to sacrifice in the power department.


I changed computers, and just realized my old account was never deleted... either way it was me.

[MrChow]

How big are you headers?? and downpipe???

I have a 3" header and downpipe going out a of a 4" catback with no res (Apexi GT basically). That shit was loud!!! Too loud! I also lost a lot of low end toque. I put the back the stock header and downpipe and now I'm golden. It's where I want it but the pipe is rub my sway bar once in a while it is dumb... Way better low end and mid end toque.
So if your headers are bigger then your stock stuff it could be that.

my 0.02 cents.

[!Zar!]

Who don't you just run stock exhaust.

No noise no problem.

[Koopa Troopa]

I hear glass packs do wonders...

Is your entire exhaust SS Autochrome? I'm guessing it's a thinner wall on the piping which would cause your exhaust to sound crappy and loud. Get a custom made exhaust built with thicker walls. Also an exhaust control valve works wonders.

[mrpeepers]

That's the inherent problems with custom exhausts, or exhausts that have been modified is that the sound is not "tuned"

I agree with your plan to get a muffler.

[Tenchuu]

Top fuel exhausts have two resonators built into them and are whisper qiuiet. i put a resonated testy pipe in the top fuel exhaust asn there is virtually no exhaust note now. quieter than stock.

[nissandr1ft]

The reason I don't go back to stock exhaust is because that would be exactly opposite of anything I've done to the car. I don't know what the primaries are on the header, but it's about a 2.5" outlet. I'm trying to do this while keeping all my power, otherwise Ill deal with the noise. Im just looking at options that do't kill power completely.

[nissandr1ft]

Reviving the dead thread...

I picked up a Vibrant Ultra quiet resonator (http://vibrantperformance.com/catalog/product_info.php?cPath=1021_1033_1055&products_id=47&osCsid=bb44a7d5ff8341983708468ae4ecde84) on the cheap,and I'm trying to decide if I want to add it to what I already have, or replace the magnaflow resonator (http://www.magnaflow.com/02product/shopexd.asp?zone=main&id=849). I'm also trying to figure out whether putting it closer to the motor would help more, or do the same job wherever it goes. Ive been hearing the thin gauge tubing could be part of my problem, and in that case Id say with the resonator towards the motor it would help quiet the exhaust the closer to the motor side.

[Matej]

Drill a hole through a potato, and when you're commuting just throw it in your muffler, and when you get home from work you'll have a delicious baked potato.

[muddafakka]

Drill a hole through a potato, and when you're commuting just throw it in your muffler, and when you get home from work you'll have a delicious baked potato.

Wow you can read minds. I was just about post the same thing.

[95KA-Turbo]

Add a turn down to the tip! It can lower the noise level a few decibels.

[blasting_speed]

Get another s13 daily driver. I wouldn't mess with the one you're gonna get too much.

[blitzkrgCT9A]

go with Apex'i WS2 NOIR and you will be happy!

I have been happy with mine. :D
http://www.evolutionmr.net/img/images/blitzkrg/apex'i_s14noir_1.jpg
http://www.evolutionmr.net/img/images/blitzkrg/apex'i_s14noir_2.jpg
http://www.evolutionmr.net/img/images/blitzkrg/apex'i_s14noir_3.jpg

[wannabe_drifter]

Whenever your done, could you post of video of how it sounds after...

I will be looking for the same kind of exhaust some time before summer.

[IIIXziuR]

+1 on The Apex WS Noir
I have one on my NA KA S14 and it sounds just perfect.
It has a nice "sporty" exhaust note for a daily driver and flows pretty nicely. Has a nice sound when you open it up too, no annoying drone on the highway.

It might not look as flashy as a s/s muffler but the subtle black finish is really cool and low key, IMO.

[SHIFT_*grind*]

I have a Fujitsubo 3" on the way that should be pretty quiet as well. At least, a lot quieter than the exhaust that's on my car...

I'll post up when I get it on my car and see how it sounds. Fujitsubos can be found pretty cheap used (mine was ~$200).

[wannabe_drifter]

To the guy(s) with the apexi ws noir: Do you have a video of that exhaust on the car to hear what it sounds like ?

[blitzkrgCT9A]

it sounds almost stock at idle.. slightly louder than stock at WOT. Definitely way quieter than JDM fart-cans.

[BoostinGST]

another thing that would work is the sard torque control valve.
http://www.nengun.com/image/catalogue/original/nengun-1612-02-sard-torque_control_valve.gif
not only will it lower the sound some but it would give you more torque at the bottom end and doesnt need to be switched on and off like the apexi ecv

[Quail]

I want to do the same with my exhaust. I've got a decat silencer (rather than the straight through testpipe/decat thats currently on there - see below). Also getting another silencer welded in to the exhaust. Should quieten down things quite a bit. I know guys in the UK have welded silencers in to their downpipe too (to meet track regs).

http://img.photobucket.com/albums/v606/Quail/decatmanifold.jpg

Have you got any more pics of your car? Love the wheels

[berz]

cant have the best of both worlds so run stock piping man

[S14DB]

I want to do the same with my exhaust. I've got a decat silencer (rather than the straight through testpipe/decat thats currently on there - see below). Also getting another silencer welded in to the exhaust. Should quieten down things quite a bit. I know guys in the UK have welded silencers in to their downpipe too (to meet track regs).

http://img.photobucket.com/albums/v606/Quail/decatmanifold.jpg

Have you got any more pics of your car? Love the wheels

Yeah the resonated test pipe gets rid of some of the rasp and off notes from the exhaust. Much better than a straight pipe or gutted cat.

http://img.photobucket.com/albums/v108/S14DB/240sx/Exhaust/TestPipeInstalled.jpg
http://img.photobucket.com/albums/v108/S14DB/240sx/Exhaust/TestPipeNewOld.jpg

[s13drob]

nice neighborhood. hahaha

[bob marley]

I don't know if anyone has tried A'PEXi's active valve tail silencer. At idle and cruising around town it's very quiet. The engine noise usually drowns out the exhaust noise. At wide open throttle, it sounds like any other coffee can catback. I only know 1 person using it and we haven't noticed any power loss.

http://www.apexi-usa.com/product_exhaust_detail.asp?id=217&pageNum=1