In Defence of the NSX Exhaust

tof

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If you want a great sounding exhaust that's nice and quiet tooling around the neighborhood but comes alive at wide open throttle followed by a state of hyper-aliveness when the valve train switches over to the fat cams, you might want to consider the OEM exhaust.

My 1991 NSX came with the Dali "GruppeN" exhaust, a nice light GruppeM clone that uses a pair of small Magnaflow mufflers to quiet things down a bit. It was fairly loud for my taste, especially cruising between 70 and 80 on the big slab. It also had a certain raspiness when heard from outside the car that I didn't care for. So I sold it and bought a used Comptech. The Comptech had a lot of miles on it but I just wanted to get some idea of what a new one would sound like before spending a grand on one.

The Comptech was quieter than the GruppeM but still had a drone at certain RPM with the engine cover in place. And it still didn't have as refined a sound as I wanted. The search continued as I listened to sound clips on the Internet and real NSX's in the more earthly relms. It occurred to me that I should try out an OEM unit, as I had not driven an NSX so equipped in many years and had never really listened to one from an outside-the-car vantage point. So I purchased a well used oem unit from a fellow Primer in Orlando, trading my used Comptech and adding perhaps 30 pounds to my car in the process.

You know what? There's a reason Honda hung this big lump in the back of the car...it sounds fantastic. It's quiet cruising around town or rolling down the Interstate but get on the skinny pedal a bit and it starts to growl. Open things up in the proper gear and the growl becomes louder and much more serious. Open the drivers window and get on the gas and the sound is glorious. To my ears, it is worth the extra weight and dated tips.

Of course such matters are very personal. And you are reading the opinion of the guy who started the Unofficial Weight Addition Thread. But if you have never driven an NSX with the OEM exhaust system intact, or listened to one in a fly-by, you should. You may be like me, and like the guys at Car and Driver who, in a recent feature on $25,000 used cars, gushed "...the flexible (NSX) engine absolutely wails above 6000 rpm. We nominate it as the best-sounding V-6 ever."
 
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I went though a few exhausts before finding the one for me. The RS-R unfortunately is no longer made but has exactly what I want. While it sounds decent outside {not too loud/not too quiet} it has zero, thats Z-E-R-O interior drone.
 
IMO most of what you're hearing with the stock exhaust when you step on the skinny pedal is coming from the intake.
 
IMHO, Is just WAY 2 quiet and heavy, you see the NSX, such nice shape, and it sounds like .. "nothing special", now, INSIDE THE CAR, hell yes sounds amazing because you can actually hear the engine barking, and that noise is just incredible behind your ears

check this Video:

<object width="600" height="350"><param name="allowfullscreen" value="true"/><param name="allowscriptaccess" value="always"/><param name="movie" value="http://vimeo.com/moogaloop.swf?clip_id=29936429&server=vimeo.com&show_title=0&show_byline=0&show_portrait=0&color=00adef&fullscreen=1&autoplay=0&loop=0"/><embed src="http://vimeo.com/moogaloop.swf?clip_id=29936429&server=vimeo.com&show_title=0&show_byline=0&show_portrait=0&color=00adef&fullscreen=1&autoplay=0&loop=0" type="application/x-shockwave-flash" allowfullscreen="true" allowscriptaccess="always" width="600" height="350"></embed></object><p><a href="/29936429">DCI RIDE OUT- North Lake</a> from <a href="/dongatofilms">Don Gato</a> on <a href="/">Vimeo</a>.</p>

@ 0:09 and 0:46 there are 2 nsx's the first silver has stock, all stock, the yellow has Tubi but with stock cats, mine @ 0:14 and 0:47 has the Pride V2 + Straight pipes .. honesty, after having my ARK + pipes (it was WAY 2 loud) and now this Pride, I think the Pride v2 is the way to go, because with stock cats, it sounds very refined and factory like "tuned", so is quiet yet somehow loud, while with TP sounds angry, which is what i like when I drive a sportscar ..

Either way I am keeping my stock heavy exhaust for some day ,,, if I need to put it back, in the end, that is the best exhaust ever, the stock one.

Oscar
 
If you want a great sounding exhaust that's nice and quiet tooling around the neighborhood but comes alive at wide open throttle followed by a state of hyper-aliveness when the valve train switches over to the fat cams, you might want to consider the OEM exhaust.

My 1991 NSX came with the Dali "GruppeN" exhaust, a nice light GruppeM clone that uses a pair of small Magnaflow mufflers to quiet things down a bit. It was fairly loud for my taste, especially cruising between 70 and 80 on the big slab. It also had a certain raspiness when heard from outside the car that I didn't care for. So I sold it and bought a used Comptech. The Comptech had a lot of miles on it but I just wanted to get some idea of what a new one would sound like before spending a grand on one.

The Comptech was quieter than the GruppeM but still had a drone at certain RPM with the engine cover in place. And it still didn't have as refined a sound as I wanted. The search continued as I listened to sound clips on the Internet and real NSX's in the more earthly relms. It occurred to me that I should try out an OEM unit, as I had not driven an NSX so equipped in many years and had never really listened to one from an outside-the-car vantage point. So I purchased a well used oem unit from a fellow Primer in Orlando, trading my used Comptech and adding perhaps 30 pounds to my car in the process.

You know what? There's a reason Honda hung this big lump in the back of the car...it sounds fantastic. It's quiet cruising around town or rolling down the Interstate but get on the skinny pedal a bit and it starts to growl. Open things up in the proper gear and the growl becomes louder and much more serious. Open the drivers window and get on the gas and the sound is glorious. To my ears, it is worth the extra weight and dated tips.

Of course such matters are very personal. And you are reading the opinion of the guy who started the Unofficial Weight Addition Thread. But if you have never driven an NSX with the OEM exhaust system intact, or listened to one in a fly-by, you should. You may be like me, and like the guys at Car and Driver who, in a recent feature on $25,000 used cars, gushed "...the flexible (NSX) engine absolutely wails above 6000 rpm. We nominate it as the best-sounding V-6 ever."

this brings up a good more general point.honda put a ton of thought into the design and function of all aspects of this car,at a time when it was heavily involved in racing.top drivers like ayrton senna and bobby rahal drove it and suggested helpful and sometimes major improvements (senna and the chassis stiffening.) i'm not saying nothing can be improved on the car,there are some weak points like the ccu boards and technology has obviously advanced,but honda did a hell of a good job in a lot of different ways.
 
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Like you I got tired of a too-loud aftermarket exhaust (RM Racing / Billy Boat TriFlow) and went back to stock (exhaust at least, still have aftermarket headers). I know the sound I'm hearing is not from the intake because there is a supercharger there. Couldn't be happier with the setup.
 
Actually a well "exercised" OEM exhaust - like some 70+ track days - sounds quite nice with a deeper tone to it.

My 98-T OEM exhaust is one that meets this benchmark and is available (posted in the for sale forum) :biggrin:
 
There is no defending the stock exhaust. After installing comptech, tubi, and arc on nsx #1. I chose the arc. Then for nsx number 2 my mission was to not mess with what Honda had perfected. After awhile I strayed and installed a taitec gt lightweight, after a couple months I said you know this one is supposed to be left stock and I put the stock exhaust back on ( rationalized that the stock was almost as good as the taitec ( really I had forgotten how bad it was)). When my wife heard the stock exhaust she asked what I had done and requested that I fix it. So I ordered a second taitec gt lightweight. The taitec exhaust is almost as light and sounds as pleasing as the arc on my other nsx. As others have stated most of the noise with the stock exhaust isn't originating from the exhaust but rather from the vvis in the intake
 
The stock exhaust was ridiculously quiet. When I first bought my car, it was the first thing that had to go. The car was one of the quietest cars I have ever heard. My 96 Honda Accord was louder. The noise you are hearing is the intake growl.
 
I'm fairly certain that the noise people hear while revving the engine to high RPMs is the air intake, the snorkel and airbox that sits behind the driver's head. When I changed the snorkel and airbox, it changed the sound. The VVIS, supercharger and exhaust options all add to it.
 
Actually a well "exercised" OEM exhaust - like some 70+ track days - sounds quite nice with a deeper tone to it.

My 98-T OEM exhaust is one that meets this benchmark and is available (posted in the for sale forum) :biggrin:

I do suspect that mine is louder than it originally was. There are actually times when I get on it in traffic and wish it was a little quieter. I'm not one to seek attention (or annoy the crap out of others) via loud exhaust note. I like to hear the engine doing it's thing...not a loud ruckus of noises that are barely distinguishable from some moron with a grapefruit shooter on his civic.
 
I'm fairly certain that the noise people hear while revving the engine to high RPMs is the air intake, the snorkel and airbox that sits behind the driver's head. When I changed the snorkel and airbox, it changed the sound. The VVIS, supercharger and exhaust options all add to it.

Supercharger both mutes the intake sound and masks it with another sound. Otherwise (with a stock intake), I agree. Every time I drive a stock NSX I think, "That intake growl is beautiful."
 
You know what? There's a reason Honda hung this big lump in the back of the car...it sounds fantastic. It's quiet cruising around town or rolling down the Interstate but get on the skinny pedal a bit and it starts to growl. Open things up in the proper gear and the growl becomes louder and much more serious. Open the drivers window and get on the gas and the sound is glorious. To my ears, it is worth the extra weight and dated tips.

+1 - I bought mine with the Taitec GTLW...yup sounded unreal, especially next to my son's hopped up Charger/hemi with perf exhaust. We both had these unreal sounding cars...problem was that away fromthe car shows, and cruising down the highway for a liesurely drive, my wife and I could not converse over the drone sound...so sold it and found what I think was a brand new 2005 OEM exhaust that had been removed upon purchase of the car in favor of a louder / more powerful exhaust.

Are there times when I kind of wish I had the Taitec back...for sure, but far more times when I enjoy the quiet cruising....and as the OP stated, open up the throttle and the overall sound, whether intake or exhaust is still very exhilerating...

I only wish I had know about the "silencers" that were available...that might have been the best of both worlds...
 
The NSX OEM exhaust is just perfect for my taste. It allows me to hear the glorious induction sound when going over 5K rpm and it has no droning - at all.
I get the need others have to try all different kinds of exhausts - this is something we all "need" to do when we are young, but later on we realize that these performance exhausts are just tiring and not worth it.
 
I do suspect that mine is louder than it originally was. There are actually times when I get on it in traffic and wish it was a little quieter. I'm not one to seek attention (or annoy the crap out of others) via loud exhaust note. I like to hear the engine doing it's thing...not a loud ruckus of noises that are barely distinguishable from some moron with a grapefruit shooter on his civic.

That's blasphemy if you cannot tell the difference in exhaust note from a 4 cylinder, 6 cylinder, 8 cylinder 10 cylinder and a 12 cylinder. Our car sounds nothing like a obnoxious 4 cylinder, and loud does not equal cheap or ricer. A stock ferrari and lambo is ridiculously loud. If you have a good exhaust on the car, the tone of the exhaust turns heads because they know it sounds different and it sounds mean. A nsx with a good exhaust sounds kinda like a GT3 at full throttle.
 
Maybe the youtube vids are tainting the sound of some of the aftermarket exhaust sounds but a number of them sound like 4 cyl fart cans from outside the car. They might sound awesome from the inside but that's not good enough for me.

Aftermarket intake and headers are welcomed but I have a feeling I'll be retro-fitting a stock exhaust when i finally get my NSX.

Cheers,
Ian

That's blasphemy if you cannot tell the difference in exhaust note from a 4 cylinder, 6 cylinder, 8 cylinder 10 cylinder and a 12 cylinder. Our car sounds nothing like a obnoxious 4 cylinder, and loud does not equal cheap or ricer. A stock ferrari and lambo is ridiculously loud. If you have a good exhaust on the car, the tone of the exhaust turns heads because they know it sounds different and it sounds mean. A nsx with a good exhaust sounds kinda like a GT3 at full throttle.
 
IMO most of what you're hearing with the stock exhaust when you step on the skinny pedal is coming from the intake.

You aren't stepping on it hard enough...or else not long enough. Trust me, I know all the notes in the chorus. there's intake air for sure, but there is also a little gear whine, some faint valve train activity and mostly MOTOR.
 
The noise you are hearing is the intake growl.

Nope. Not on my car...at least not mostly. I know what an intake howel sounds like and what combustion sounds like. Maybe mine sounds so good because it's an older well-worn example. Although I understand there is no packing in the oem exhaust...just lots of complex baffling...this according to another primer who cut one open. There's a tread about it somewhere. One thing that is a little unusual about my exhaust...it has plain oval tips. I think these are just the oem tips with the little grills removed, though. But maybe not. Still. tip design can't account for what I am hearing vs. what some of you are describing.

I can't vouch for the sound of the oem exhaust from the outside, although based on the heads I see turning I think it may be a bit bolder than your average grocery-getter. But frankly I could care less what it sounds like to othere. In the car I love it. With the driver's window open I love it even more.

To you guys who say your exhaust is quieter than an Accord (and my Accord was about as loud as an electric golf cart), all I can say is maybe the design changed or these things really do age well. There is no way in hell the noises I hear can be mistaken for a family sedan...unless I'm just easing around town.

And lest you think I've never had any other aftermarket exhausts, I've owned, among other things, a bown B16 Civic Si with a Mugen twin-loop, a V6 Accord with comptech headers and cat-backs, an HKS HiPower equipped S2000, and a nasty built-engine Galant VR4 running 30 pounds of boost with a 3.5" sewer pipe from downpipe to tip. Nothing very exotic to be sure but enough to learn the ins and outs of car tunes.
 
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Actually a well "exercised" OEM exhaust - like some 70+ track days - sounds quite nice with a deeper tone to it.

My 98-T OEM exhaust is one that meets this benchmark and is available (posted in the for sale forum) :biggrin:

Hrant, you're dead on. When I once remarked to the owner of Tubistyle that my Tubi exhaust was getting " better with age " he smiled and implied most mufflers sound " better " when they get old, i.e. When they start to fall apart !
Of course, with Italian products, we all know that happens a little faster :tongue:
 
You know what? There's a reason Honda hung this big lump in the back of the car...it sounds fantastic. It's quiet cruising around town or rolling down the Interstate but get on the skinny pedal a bit and it starts to growl. Open things up in the proper gear and the growl becomes louder and much more serious. Open the drivers window and get on the gas and the sound is glorious. To my ears, it is worth the extra weight and dated tips.



Absolutely agree! I test drove four NSXs when looking to buy, two with aftermarket (dont' know what kind) exhausts and two stock. Then as today only the OEM exhaust in VTEC range gave me goosebumps. And I love the way the stock exhaust ticks itself cool afterwards.
 
Maybe the youtube vids are tainting the sound of some of the aftermarket exhaust sounds but a number of them sound like 4 cyl fart cans from outside the car. They might sound awesome from the inside but that's not good enough for me.

Seconds 15-30 of this video illustrate well (the whole video does, but the sound is isolated for that period):
http://www.youtube.com/watch?v=b9yBUKDD3xY

What do people call that sound it makes when he lifts off the throttle? (I'm looking for the real term, not "fart can rattle.")
 
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Seconds 15-30 of this video illustrate well (the whole video does, but the sound is isolated for that period):
http://www.youtube.com/watch?v=b9yBUKDD3xY

What do people call that sound it makes when he lifts off the throttle? (I'm looking for the real term, not "fart can rattle.")

Rasp? I also wonder what would help solve this 'issue' though? Would a set of Angus Resonated Test Pipes solve this?
 
Like you I got tired of a too-loud aftermarket exhaust (RM Racing / Billy Boat TriFlow) and went back to stock (exhaust at least, still have aftermarket headers). I know the sound I'm hearing is not from the intake because there is a supercharger there. Couldn't be happier with the setup.

Really? I have the RM/B&B and I don't find it loud at all. You can easily have a conversation in the car while hwy cruising and at idle. It only roars when you put your foot in it- kind of like the Comptech. Maybe your muffler was blown out?
 
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