What causes Exhaust Rice-ness
 

So i have the Greddy Evo and DC RH. I'm wondering what causes the ricey sound. My Evo sounds horrible at certain rpm's, like a rattling vibration rice noise. It's not a leak or loose piece or anything. Is there anything i can do to make it stop or should i consider a new exhaust?

Re: What causes Exhaust Rice-ness
 

Its all about the size of the pipes, the resonator shape, type of car and muffler. Its basicaly just how the air responds to what its traveling through and the speed its traveling, but with exhausts you really dont have many options of differnt materials.

You can experiment with differnt resonators or put a silencer on.

Re: What causes Exhaust Rice-ness
 

any suggestions?

Re: What causes Exhaust Rice-ness
 

4cyl...with large exhaust...and low hp..

But yea, I would recommend a silencer too...and if they did cut off ur resonator...then you'll probably want that back on too..

Re: What causes Exhaust Rice-ness
 

no resonator is the ricey part!

Re: What causes Exhaust Rice-ness
 

4 bangers are raucous. The harmonics of them are inherently horrid and you need something to dampen it out... resonators, a good muffler, a turbo, etc... mixing and matching parts is going to cause resonance frequencies to jump around, depending on how the parts were designed to work together. Sometimes it works out, sometimes it doesnt. Apparently in your case, you wound up with a goofy set of frequencies that wont cancel out, hence, you hear funny noises.
Listen to a completely unmuffled car like a Honda Challenge car. Sounds like the stereotypical can of bees, yet still melodic in a strange way.

Re: What causes Exhaust Rice-ness
 

my rsr doesnt have resonator and it sounds great, very low toned, sounds like bass at low rpm and nice low tone at hi rpm. very sporty.

Re: What causes Exhaust Rice-ness
 

yeah i have straight pipes after the cat and it sounds great no rice just good low roar...not like a rattling"broom" maybe its your car?
hmm...
i have no idea i just heard a couple of cars that do sound like that i dont like it either...

Re: What causes Exhaust Rice-ness
 

the straighter the pipes exiting out the car the better the sound? is it safe to assume that?

Re: What causes Exhaust Rice-ness
 

how long have you had it? i've had my apex'i n1 on for a while, and when i first got it, it was great, low and not too loud, even without the silencer. now it sounds like crap even with the silencer in. i think it just wore out and it's time to get a new one.

Re: What causes Exhaust Rice-ness
 

Could possibly be that it's worn out but i've never really heard of that. As for everyone who says there exhaust is nice and deep, do u still have stock header and/or cat. Mine was ok sounding before the Race Header.

Re: What causes Exhaust Rice-ness
 

its the design of the muffler...and whether its equiped with a renator or not.

companies will try all sorts of combination to get the best sound... why do u think companies like magnaflow sounds good? or the RSR?

but as for greddy...it sounds like crap on the EM2.

Re: What causes Exhaust Rice-ness
 

Right resonator and pipe size plus chambered muffler will do the trick.

Re: What causes Exhaust Rice-ness
 

i have a magnaflow resonator and a magnaflow muffler...the muffler isnt just a hollow can i mean u can see inside its built to be muffled and free flowing. its got all kinds of stuff inside. but im getting custom piping so yea..and i still havnt got it welded..:_disgust: ...i duno..whatd u guys think? rice or nice?

Re: What causes Exhaust Rice-ness
 

*subscribed* because when i buy an exhaust down the line i wanna know what i should do to not have it sound raspy at higher RPM's like all exhausts can sound good at idle, or good when your car is parked and u set up a recorder, but i need to know what setups actually will produce a nicely toned sound :)

Re: What causes Exhaust Rice-ness
 

I have an EVO2 on my em2 also, but with a k20a2, and at times it sounds ricey. I think I'm gonna get an RS*R or something. They look better anyway. Does anyone know how much more restrictive they are, or if i'd notice a power decrease?

Re: What causes Exhaust Rice-ness
 

Get a bigger motor or get an axleback exhaust .. HKS is nice IMO.

Re: What causes Exhaust Rice-ness
 

over time the baffles in any muffler will wear down and change the sound.

Re: What causes Exhaust Rice-ness
 

your problem is due to your race header. the header eliminates the catalytic converter. i have the same header on my car, and i only have an RSX-S axleback on my car and its louder than stock with just the header on.

you already have a pretty quiet exhaust on your car, it being an Greddy Evo exhaust. if you want the raspiness of the exhaust to go away, your best bet would be to get a resonator welded onto the midpipe of your exhaust.

Re: What causes Exhaust Rice-ness
 

Yeah, i got the HKS axleback and it's mild when compared to others. It's actually kinda starting to irritate me though. Rattles here and there, ya know just small stuff.

Maybe i'm just sensitive or something. :shrug:

Re: What causes Exhaust Rice-ness
 

on an ex model em2. haveing the 4-2-1 race header eliminates the cat? i dont think thats right, maybe on the lx or dx models but on the ex the cat isnt integrated into the header.

Re: What causes Exhaust Rice-ness
 

DUDE I have that prob too.. I just got longer hangers.. maybe that will fix the rattling:_doh:

Re: What causes Exhaust Rice-ness
 

it eliminates the cat on the em2, hence being called a race header.

So do u guys think that another exhaust will be less raspy or because of the RH will they all have that sound.

Re: What causes Exhaust Rice-ness
 

DC Sports makes a RACE header for the '01-'05 EX civic. its a race header hence, eliminating the cat. the DC header includes a downpipe which eliminates the cat. its nothing compared to the shorty header. my car is an EX model.

DC Sports Race Header:
http://www.truehonda.com/makeimage.p...jpg&w=150&h=50

DC Sports Shortty Header:
http://www.truehonda.com/makeimage.p...jpg&w=150&h=50

Re: What causes Exhaust Rice-ness
 

ricey whats that...i got a cheap tsudo carbon fiber exhaust and the shyt sounds great...lowwww n deeep everyone loves it, the greddys sound like shit at hi rpms on the em2 in my opinion.

Re: What causes Exhaust Rice-ness
 

n no i didnt buy it...it came with the car

Re: What causes Exhaust Rice-ness
 

how does urs sound at high rpm? any sound clips? ^^

Re: What causes Exhaust Rice-ness
 

if you guys wanna hear mine, here's a vid of it. Listen to the raspyness. It sounds good when u free-rev it, but under accel its shit. damn i hate it.

http://www.youtube.com/watch?v=HqZxc4x2xkA

Re: What causes Exhaust Rice-ness
 

Maybe so. Were did you get your longer hangers from?? :bump:

Re: What causes Exhaust Rice-ness
 

Apex-i for the WIN!!!

Re: What causes Exhaust Rice-ness
 

how is the rice sound like? i dont even know lol..anyone in here have the links so i can listen to it? lol

Re: What causes Exhaust Rice-ness
 

wait he said he hasnt welded on yet!!?
so is it just there?
on your stock pipe?

Re: What causes Exhaust Rice-ness
 

I have a greddy evo II, dc sports ss 4-1 header and aem v2. I love the sound of the exhaust on my car at low rpms. However, Ive noticed lately that when I drive at higher rpms for long periods of time, I hate the way it sounds. Not only is the exhaust about 2 years old on my car, but when you drive at high rpms for long distances, the sound will change due to the temp of the air. IMO, drive at night when the air is cool, cars are way sicker at night and more HP.

Re: What causes Exhaust Rice-ness
 

stickers will giv you more Ponies than driving at night...lol

Re: What causes Exhaust Rice-ness
 

yeah i heard each sticker gives you 5 hp!!
lol
back on track!
how do you have the muffler on without weldin?

Re: What causes Exhaust Rice-ness
 

the greddy on my em2 sounds pretty bad lately, so when my swap is going in, i'm switching over to the 05/06 rsx-s muffler with the greddy mid pipe. here is how it sounds now:

http://i37.photobucket.com/albums/e5...h_MOV01574.jpg

Re: What causes Exhaust Rice-ness
 

Now that you evo II owners have your videos posted Im getting a little worried. Ill post my exhaust sound up later. Hopefully, it doesnt sound too bad, you are right, d5civic, the evo II you have right now does not sound as good as when I first had mine, I hope nothing has changed. Also, when I first installed mine, when I put my hand in front of the exhaust hole, I could feel a ton of air coming out of the exhaust. Now, the air is weak, and when I rev, it sounds like their is more sound coming from behind the rear right wheel. I am just stipulating, I will check it out this weekend though.

Re: What causes Exhaust Rice-ness
 

dude I'm stoked the longer rubber hangers fixed the problem.. I got them at VIP.. they were dicks tho lol, they were like "hey you got a fart can on that thing?" ...dumbasses.

Re: What causes Exhaust Rice-ness
 

lol d5civic did u soak ur camera enough. thats gross. ur exhaust is sick.....literally.

Re: What causes Exhaust Rice-ness
 

I'll jump in with my opinion because I feel I've had some good experience with exhausts: The sound of the exhaust has mostly to do with the muffler/resonator/catalytic converter, whatever interrupts the air flow. Currently I have the HKS hi-power muffler with 2.25" all the way from the stock headers and no resonator. I love the way it sounds, it's a full body sound, without any rasp. I feel that the quality of the sound has A LOT to do with the quality of the parts used, and the manufacturer. I've had good experience with HKS, I've also have a less exciting experience with a company called powertech, which is a low end 100 dollar muffler. I've also heard the differences between Greddy and Apexi' which both I love, however they all have their own signature sound.

If you just want to steer clear of a raspy rice-esk sound, then just invest in a good quality muffler.

Re: What causes Exhaust Rice-ness
 

So, can can i keep the midpipe and get a decent axleback?

Re: What causes Exhaust Rice-ness
 

Yeah, the HKS is an axle back.

Re: What causes Exhaust Rice-ness
 

no i never made a sound clip or whatever but i guess i can try probably on saturday i'll try to make one

Re: What causes Exhaust Rice-ness
 

That's how I started out, with the stock exhaust and then the HKS axle back, and honestly, it didn't come close to what I wanted, it was cool and everything, but it didn't have that loud of a sound at all....maybe that's what you want. But i wanted a full bodied sound. And for me, I had them pull out the stock pipe from the headers back to the axle back and replaced it with a 2.25 in pipe. And its perfect loud enough for me without being annoying or raspy....

When it's all warmed up, you can out rev a lot of other aftermarket exhausts.

Re: What causes Exhaust Rice-ness
 

That's cool, but too high pitched for me. I should make a video of mine...

When it idles, it sounds like boiling water....strange, but cool then when you rev it up, it freakin roars.

Re: What causes Exhaust Rice-ness
 

Please post a vid, I'd like to hear it.

Re: What causes Exhaust Rice-ness
 

do u think it matters if its custom piping from a muffler shop....as far as lets say from the cat back to the resonator and back to the muffler.. do u think that will change sound ina bad way or good way..

Re: What causes Exhaust Rice-ness
 

My take on all this is: I have an APEX'i WS2. It's quiet... no rice or even any sound at all... however when my wastegate opens fully around 4500RPM my car suddenly turns into a deafening roar. But still... The WS2 is really quiet and nice. No highway drone, no can of bees, no people looking at me funny.