vietxquangstah

iTrader: (7)

First and foremost my car is a 2008 Base (Only comes in Automatic for those who don't know)

So I did some quick searching here on AZine and saw a few posts regarding drone with the ATLP quad exhaust system. Nearly all of these people experiencing drone bought the "Non-Resonated" version and got a aftermarket resonator welded on and it cured the drone.

However, I have the ATLP v1 RESONATED version and still have drone! I am for certain that my RV6 v3 PCDs and v3 J-pipe are playing a major role for the drone I'm experiencing.

The first type of resonator that comes to mind is this magnaflow resonator that RV6 recommends http://rv6-p.com/tl/3rd-gen/magnaflo...nator-234.html . However I noticed that specific resonator was mainly for the people with the PCDs + Jpipe + FACTORY exhaust that was experiencing slight rasp between 3,000-4,000 RPM. I don't know if that same resonator will cure my problem I'm having UNDER 3,000 RPMs

The drone I am experiencing occurs all under 3,000 RPM. Slightly press the pedal to drive around town and I get drone. If I'm driving up a hill and press the pedal so the car doesn't lose speed I get major drone in the cabin with the windows up.

Everything from 3,000 RPM to redline is perfect. Just crisp clean exhaust note with no annoying ear-buzzing drone. I seriously feel like a ricer in a 4 cylinder when the car is under 3,000 RPMs just driving..

My question to you guys is what brand, what size, and does it matter where the resonator is welded on?

2008 5AT 3.2L

Exhaust mods are;

RV6 v3 Precat Deletes
RV6 v3 J-Pipe
ATLP v1 RESONATED quads

paperboy42190

iTrader: (7)

so you are catless and still expect no drone?....cant have your cake and eat it too. You can get power from pcd or quiet from stock precats....choose one but not both

vietxquangstah

iTrader: (7)

Obviously I'm aware my PCD and v3 j-pipe are contributing to the drone. You act like I asked "MY ATLP ARE RESONATED BUT WHY DO I STILL HAVE DRONE??". I clearly acknowledge my RV6 parts are the reason for the drone.

The whole purpose of my post was to ask what size or brand resonator would be a good candidate to get rid of the low RPM drone. Many have mentioned "vibrant" but no part number so I don't know what size (length) I need.

Thanks for your help

con5tant

iTrader: (4)

I've been looking at the Magnaflow 12640. My car is pretty low so I'm not sure if it will work. It is a bit thick (6" round)... i'm not sure about ground clearance.

MAS

iTrader: (3)

I have resonated ATLP and PCDs and I know exactly what you're talking about. And the sub-3k drone is very annoying. I actually don't have the v3 j-pipe you have so I actually have a 3rd cat.....couldn't imagine how much more drone it would be with no 3rd cat. Now just yesterday I put in the Vibrant Ultra Quiet Resonator and I can tell you this thing is amazing. It is a straight thru resonator but the sound reduction is truly amazing. It reduced the sound so much that I will easily now consider going fully catless or at least the high flow cat I have in the garage. You really need to give it a shot.

con5tant

iTrader: (4)

How low are you? I think the Vibrant Ultra Quiet Resonator is larger in diameter than the Magnaflow 12640

vietxquangstah

iTrader: (7)

That's pretty awesome man. Can you give me a link to the vibrant ultra quiet resonator you bought or part #? Also did you remove the original ATLP resonator and replaced it with the vibrant resonator, or did you keep the ATLP resonator in place and welded the vibrant resonator downstream after it?

I'm not very low at all. I have maybe a 1 or 1.5 finger wheel gap at each corner. Is the magnaflow 12640 the same resonator that RV6 performance has on their website?

By the way thanks guys. These are the types of responses that other members in the future that are having similar problems could use to solve the drone.

I just found this link - https://acurazine.com/forums/3g-tl-performance-parts-modifications-112/how-do-i-keep-x-exhaust-rasping-pcds-849750/ - and it seems the 12640 should do the trick. But I'm still open to other opinions regarding what other resonators should do the trick

con5tant

iTrader: (4)

No it's not.
Looks like you answered you own question.

sockr1

iTrader: (5)

i've been looking into resonators lately, i have some rasp (vibration/rattle) around 2400 and general drone even though i only have hfpcs, j pipe with 3rd cat, and the xlr8 resonated exhaust. the xlr8 resonator is very small (14" long by 3" diameter), so after lots of research and talking with members i just bought the magnaflow 10436 (4" by 22") to reduce the drone/eliminate the rasp.

i know some other members ran 10426 (4" by 18") with pcds but still had some rasp, and i've also heard that people ran the large 12640 (6" by 27") and that got rid of it completely but it could be a problem if you are super low.

i will be replacing my xlr8 resonator with the magnaflow resonator. after talking with xlr8, rich (rv6), and other members, the resonator will definitely reduce drone and rasp

DomGSR-T

iTrader: (1)

Resonator are good for high pitch noise like rasp. Drone cannot be cured by adding 2-3-4 resonators.

con5tant

iTrader: (4)

How low is too low for the 12640?

sockr1

iTrader: (5)

not sure exactly, but check out this thread. one guy said it sits about 1" below the frame rails:

http://www.tl.acurazine.com/forums/s...php?p=13802470

con5tant

iTrader: (4)

Yea....not gonna work for me lol.

Comptechtl2367

Why not run an High Flow Cat where the third one was? I had the same exhaust setup but with Tsudo and welded in a cat and boom no drone and made the exhaust sound a lot deeper. You talk almost no loss of power and will make you way happier then just welding in another res.

vietxquangstah

iTrader: (7)

Thanks for sharing, but I don't want to spend another $300 + shipping + shop fees just to get a high flow cat welded onto my rv6 v3 jpipe. The whole reason I got the v3 Jpipe was because it deleted the 3rd cat. I would be crazy to take a $450 j-pipe that deletes a 3rd cat and spend another $300 on a high flow cat just to get it to quiet down.

I understand your trying to help, and you clearly said it eliminated the drone for you but I would much rather spend less money to reduce the drone.

That being said, I just ordered a magnaflow #12640 and plan to get it welded on in a week or two. The price of this resonator along with shop fees is still more than half less than buying a high-flow cat alone. Add shipping cost for the high-flow cat and shop fees and I'm saving even more money.

After stumbling upon this thread by Richie V6 ( https://acurazine.com/forums/showthread.php?t=849750 ), I was pretty much sold on it. Most of his calculations, measurements, and "estimates" were aimed towards getting rid of drone & rasp when having Pre-Cat deletes & paired with the ATLP exhaust specifically which makes me feel a bit more comfortable.

I'll probably take a before and after video and post it on here just in case anyone else is interested.

mikesku

iTrader: (6)

I know a guy who can install that for you lol

NvrDwn

Get the longest thickest resonator that can fit.

zachlone

Long and thick just the way she likes it!

vietxquangstah

iTrader: (7)

nbp06aspec

I agree, I have a very similar setup (see my signature) with a 10436 magnaflow resonator and there is slight drone around 2500-3000k rpms. A buddy of mine has the same setup with PCDs and yes it drones, but its not that bad. I could live with, but everyones tolerance for drone is different.

I would recommend a 10436 resonator.

sockr1

iTrader: (5)

my 10436 comes in today and i'm going to replace my xlr8 resonator tomorrow with this one. i'll update here afterwards but i expect the drone to be reduced and the slight rasp to go away.

nbp06aspec

You should not have any rasp. I have a similar setup to you and do not have any rasp.

sockr1

iTrader: (5)

it's some weird vibration/rattle noise that only comes in around 2400 rpms in every gear, maybe it's not rasp just excessive vibration. i've heard it on other cars too (ILC had a video maybe i can find it and see what you think it is) as well as other members saying they got it also when they put on HFPCs with the XLR8 resonator and it just sounds weird since i torqued everything to spec

sockr1

iTrader: (5)

i can only hear it with the windows down but it's definitely there. some examples of the sound are shown below, they are not my car but display the sound i'm talking about.

check out the sound at 0:56 below:
http://www.youtube.com/watch?v=pnlol...ature=youtu.be

and around 0:11 here:
http://www.youtube.com/watch?v=Pn-Qv...ature=youtu.be

those are from this thread that also talks about some rasp from HFPCs
https://acurazine.com/forums/3g-tl-performance-parts-modifications-112/exhaust-clips-atlp-rv6-868830/

again, not horrible, but this 10436 resonator should kill some drone and hopefully this sound.

vietxquangstah

iTrader: (7)

So I got my 12640 magnaflow resonator yesterday. I headed to a fellow AZiners shop to get it welded into place. Thanks mikesku!

Sorry but I couldn't capture any sound clips to show the drone. I tried recording with all windows down, but when playing it back the drone was very hard to hear. In person it's definitely noticeable and over powers everything. You'd have to turn the radio up past 10 to drown it out, but even than you can still hear it in the background.

So after getting it welded on I backed out the shop and slowly drove off in the parking lot. I noticed a HUGE difference right than and there. Previously when I drove through parking lots at slow speeds my TL sounded like a damn 4 banger making a ton of noise but not going anywhere. Now it sounds quiet compared to before.

It did not get rid of all the drone, but only about 70-80% of the drone. The drone that still exists now is more subtle than before and definitely tolerable to the ears. Previously when driving with the windows up going 65mph on the highway the cabin would be filled with so much drone that it was very annoying and hard to even think!

The one and only downside to the 12640 resonator is that it's so big that I'm afraid I might have trouble with some speed bumps or even hills/inclines that turns to flat pavement at the very top of the road. My car is only dropped 1.5-2 inches and it seems that if I go any lower I will run into clearance problems..

If I ever damage the resonator because of a bump or decide to lower the car some more, I might just remove the #12640 and replace it with 2 separate resonators and get them welded one right after another.

con5tant

iTrader: (4)

According to Sharksbreath, who has the 12640 says that there shouldn't be a problem with clearance as the res fits into the tunnel. He is extremely low also.

vietxquangstah

iTrader: (7)

Awesome thanks for letting me know. I'll take pictures of how low it lays underneath the car just incase anyone is wondering.

con5tant

iTrader: (4)

In for pics

sockr1

iTrader: (5)

just wanted to do a follow up on my resonator/exhaust experience as well. this past saturday i installed a used magnaflow resonator (model 10436, 4" by 22") to replace the xlr8 resonator (3" by 14") in my quad setup. drone has almost entirely gone away and i can talk at a normal level with my passengers while cruising above 70 on the freeway...much better!! there is still a nice deep sound whenever i accelerate but general drone has gone away, so nice.

it's quieter in general but still sounds great when it needs to be. my wife is very happy haha. i also had some rasp/vibration/rattle noises around 2400 rmps before replacing the resonator and now that has gone away also. since the resonator is only 4" in diameter it doesn't hang too low. i would recommend this or the 18" version (10426) to anyone that wants to reduce drone while still keeping the nice sound

just as an ending note...i don't have as much drone and rasp as pcds since i have hfpcs, that is why the smaller 10436 worked for me (rather than the 6" 12640 that vietxquangstah got, which didn't kill all the drone for him)

Butter type-s

I was wondering if you guys can shine in. I was just informed that my secondary cat is broken, making the tl sound bad and making the car randomly shut off after reaching hi temperature. I have ordered Atlp quad non resonated, Atlp jpipe with test pipe, I got quote 270 dollar for the stock cat from the dealer, but I'm considering running Pcd. Is there any member out there running Pcd, Atlp jpipe/test pipe and Atlp quad non resonated and what resonated you guys using?