Asian Candy

I have that same raspy shit. Don't like it at all! Guess we'll see what happens when I install the rest of the exhaust.

spdandpwr

Can someone post a video of the rasp so I can grasp the extent of the noise and gasp in surprise.

YZ450

Yes, it's kind of annoying!

Unfortunately, I took mine off this past Saturday. I'm keeping it in the garage for now until I've the time to find a solution to get rid of the raspy sound.

Mr. TTL

Thanks!

KillerG

thanks alot!

also, did anyone else experience this phenomenon of the car raising up a significant amount after the PCD install? i was going to adjust the height on my coilovers today but i guess not (?)

and can this be installed easily on jack stands/jacks or should i schedule some lift time in a garage?

Asian Candy

Oh, shit. Man I was just joking about that because the stock downpipe is so f'in heavy.
Lol. Sorry.
I'm a fairly big guy, so it was kinda cramped under the car, but jack stands are fine.

spdandpwr

^killer has a terrible sense of humor...lol, I totally picked up on your facetiousness...i think dental school will do that to you

Mr. TTL

OK, before I go and put this on, how bad is the rasp?

Asian Candy

To me, it's loud. Windows up, ac on, and radio on, I can hear it clearly. At least is short, only between 2,000 rpm and 3,000 rpm. But only when driving. If I'm stopped and rev the engine it doesn't happen. I pray when I install the rest of the exhaust it goes away. Was planning to replace the stock resonator, but now maybe I'll just add a second one.

ed_423

Video of rasp please Guys!

mrstak

iTrader: (1)

yes +2 on ed's request. video of the rasp.

Asian Candy

How do I upload a video I took on my ipone? I'm trying to upload from my pc, but it keeps saying there is an error

tobwac

^post it on youtube and then copy the link

Asian Candy

Hope this works. This was on my ipone so ignore the quality. I have the downpipe and the HFC installed. I also have the CT icebox, which I can't even hear any more.

YZ, I see you have a 2011. I have a 2012. I wonder if this has something to do with the later models?

In a few weeks, after I lower the car, I have a custom exhaust getting installed. This was planned before the downpipe, and my goal was to create as much of an aggressively deep tone as possible. This rasp kinda throws a wrench into that plan.

Instead of just replacing the stock resonator, I'm thinking of adding a second resonator along with the stock resonator. But the rasp is coming from either the downpipe or the exhaust manifold. So I'm not sure another resonator will make any differnce since the rasp is before the resonator.

Very dissapointed!

Richie v6

Getting some rasp is very common with modifications that deal with freeing up the exhaust. This PCD/Downpipe is equivalent to a header and makes power by freeing up the exhaust. It is pretty much common knowledge that headers and cat deletes will cause some rasp. In the case of the TSX it really isn't that bad there is light rasp during 1krpm window. If you are unhappy with the rasp you can add a resonator. This is pretty much common knowledge resonators convert rasp into a sexy deep tone if done properly.

Believing any type of header modification will give you a deep sound is just foolish. We aren't talking about small gains and huge trade offs. The PCD alone makes ~10% HP gains over stock.

ssjoeboe9

lol @ leaf blower noise

spdandpwr

the audible "metallic" sound is due to the cylinder head's "integrated manifold" design, coupled with a high flow downpipe. That's also the reason the stock cat is SO restrictive, it bottlenecks the sound, and the flow. A resonator like the ones from vibrant should deepen the tone...I suggest vibrant's 18" resonators which will weld neatly to the factory exhaust

spdandpwr

P.s. the factor exhaust sounds like a quieter version of that noise...if you actually put decent vibrant mufflers and a better resonator, you won't get that shitty noise...case in point, my civic Si was catless, but with some proper resonators and a catback it sounds nice:

spdandpwr

and notice how a downpipe on the civic si exhaust sounds different...



it's all about how you combine resonators and mufflers to alter the exhaust flow / tone

Richie v6

Rear mounted camera from our test car. Its aggressive with a slight hit rasp. Definitely not in the fart can civic category.

Mr. TTL

Still going to install this. Factory 2nd cat and don't mind some noise. Where do you jack the front from with a floor jack? Looking for central point to raise front so that I can put jack stands under front. Also in back, good point to put floor jack? Thanks

KillerG

ugh. normally i wait a long time and im never an early adopter but speeddanpower gave me a price i couldnt refuse on his pipe

I have an intake (SRI) and a pair of magnaflow mufflers, so my exhaust setup is already loud enough. I will be the hero this city needs and install this downpipe soon, and i am also going to order a resonator beforehand so i can have it installed it shortly after.

Can anyone recommend the vibrant or magnaflow res, or rather provide a reason why i should get one over the other, and can anyone suggest where to install the resonator ?

KillerG

KillerG

lol,

Asian Candy

When YZ first mentioned the rasp, you said it ISN'T normal. I didn't foolishly expect the downpipe to give me a deep tone... I know that's the exhaust's job. But I didn't expect this either.
But if those with experience believe a resonator will help, then that's good enough for me.
Question is, do I add the resonator before or after the stock resonator? Or just replace stock resonator all together? Also, magnaflow resonator I bought is 14". Should I get an 18" instead? I want to eliminate the rasp as much as possible without overly quieting the exhaust itself.... If that makes sense.

@killerG, I have a magnaflow setup going in, also. Same as what Jeroplex had installed So would love feedback or video of what it sounds like after you install the downpipe

@SpdandPwr: I'm not familiar with vibrant, but are their exhsusts noticeably deeper than magnaflow?

On a positive note.... The performance gains are very noticeable! Throttle response is greatly improved and the car pulls ALOT harder!! And the rasp isn't noticeable when cruising in that 2000-3000 rpm range. Only when accelerating.

If the new exhaust can clean things up, then I'll be extremely happy.

KillerG, please keep me posted on yours.

YZ450

Just a thought!
Can a 12” resonator be installed to the PCD itself where the first cat was? I’m just wondering as I don’t want to mess with the stock exhaust system and my intention was never going custom. I just wanted better response from the car.

spdandpwr

both magnaflow and vibrant employ the same design, so you shouldn't worry from that standpoint. The length, though, is pretty important as it determines which frequencies get phased out -- building exhausts is actually a science and not an arbitrary exercise of slapping together pipes (that's why those high-end exhausts are so expensive, especially for german cars). I do know that a longer resonator will do more in terms of silencing the tone and deepening the exhaust, but it could also add drone. However, since you're running the stock mufflers (and will run the stock resonator in tandem), you probably won't hear drone. So, net-net run the longer resonator.

spdandpwr

I didn't install the pcd, so do you know if it will fit (the resonators are pretty wide) without rubbing against the firewall or the engine? Honestly, who's going to know that you added a resonator to the stock exhaust? A good shop won't hack it up.

spdandpwr

free and easy

Asian Candy

I'm going to be running magnaflow mufflers as well. Not the stock mufflers. The guy installing it all is extremely well respected by every other exhaust installer in the city, so I'm confident he'll do a great job, but I'm open to all opinions, so what do you think would best accomplish: lessening or eliminating the rasp, while minimizing drone and maximizing the deep tone. Adding 14" resonator to stock resonator. Adding 18" to stock resonator. Or replacing stock resonator with an 18"?

YZ450

Thank for your input , but my question was more regarding funtionality. For fitment I guess it won't be too difficult as the primary cat was already there.

spdandpwr

I'm not sure how the stock resonator works in terms of which frequencies it cancels out. If you want volume, then eliminate the stock resonator, if not, use that in tandem with another resonator...typically an aftermarket resonator lowers exhaust volume by 3-5 db.

spdandpwr

it shouldn't, aftermarket resonators are hollow...at least the ones suggested in this thread.

spdandpwr

oh, and there probably won't be much of a difference between the magnaflow and the vibrant, just go with what's cheaper.

Asian Candy

Volume aside, which setup do you think would lessen drone and more importantly, lessen the rasp?

Thank you for your help. I really appreciate it!

spdandpwr

Get the longer resonator (not sure if the 18" will fit).

Sorry I didn't mention this before, but: there are two types of resonators, a louvered core and a perforated core (from what I know, the Magnaflow and Vibrant are both perforated). The louvered cores have little hooks that cancel the frequencies. The perforated cores are just holes in the sides. Needless to say the louvered cores reduce flow (by about 5%, I'm told), but they make the exhaust slightly(!) quieter. Longer resonators have a greater effect, cause there's more space to cancel the frequencies. The sound change does not vary much between brands of resonators. The sound difference comes with the length of the resonator and or the number of resonators you use! The longer the resonator, the more effective it is!

Asian Candy

Thanks man! You seem to really know your shit.

Quieter I'm not overly concerned about. It's the sound frequency that I want to accomplish. Especially the rasp. I know it's impossible to eliminate all high frequencies, but my goal is deep tone and nothing else. Being loud takes a backseat.
I think I'll try just replacing the stock resonator with the 18" magnaflow since, to me, the stock resonator doesn't seem all that great. I'll see how that works and add a second magnaflow if needed.

spdandpwr

Keep us posted!

Asian Candy

Definately.

It will be a few weeks until I install it. My exhaust guy said to lower it first, which I'll do this weekend, if my Coilovers arrive in time.

Hopefully KillerG will have his downpipe installed and give some feedback on the sound since I believe he has the same exhaust setups as I'm putting in

spdandpwr

Really? I'm not sure those mufflers will sound great with the downpipe. They sound really soft. I would go on the TL forums and see what they did to handle rasp, etc.