New exhaust sounds bad!!?? HELP!!

[PVan96]

Hey all,

So I just had a brand new full exhaust put on my Marauder from the factory EM's back. Had all 4 cat's removed, H pipe, 2 Super 44 flowmaster mufflers, into 24 inch long 4inch wide slant tip without resonators. I used 2&1/2 inch steel tubing. So i was all excited and when they fired it up for the first time at the muffler shop it sounded GREAT!!!! but now that I have driven the car for 2 days it really does not sound that good, infact I wish I would have saved the $600 or so and left it all OEM!!!!! I cant believe I just said that, but yes I think the car sounded better. Any advice on what I can do, Different Mufflers? There has to be something, cause if not Im going to the muffler shop on Monday and having them weld in the factory mufflers.

Any help would be appreciated. :help:

Thanks

Pat

[TiTo35]

What does it sound like?

[PVan96]

It sounds AMAZING in first gear with your foot on the go pedal. but once second gear comes its really raspy, like rattling i guess would be a good term, but then third sounds nice, and fourth gear going down the highway is horrible, Loud drone in the car and just not a performance sound at all, only in first gear. I even brought the tips out about 1+ from the rear bumber cause sometimes I heard unnecessary drone if the tips are underneath the rear bumber in other cars. Any ideas?

[MM03MOK]

Have you heard other Marauders with modified exhaust systems?

[PVan96]

Also at WOT it sounds awesome going through 1 2 & 3 gear, but fourth is just annoying cruising the Hwy.

[PVan96]

I have not heard any other Marauders with an aftermarket exhaust, but I figured it would have to sound good- Ive only had the car for about a week and a half but I was itching to do the exhaust. Now I cant wait to change it to something else. IS that how all of them sound with flowmasters?

[Bradley G]

Did the shop that did the work reuse the funky looking weights that hang off the mid pipes?

[PVan96]

I am not sure about any weights on the mid pipe? I know that they used all new hangers and such.

I wonder if I threw on some sort of resonators inline before the mufflers, but then what mufflers to use?? I know one of you guys on here will know what to do!!

THE DRONE MUST GO!

[justbob]

What did you do about the 02's? Sounds like you could use some more backpressure and i don't think putting the stock muffs back on will help you all that much. Did you atleast save your cats? Have them put two of those back on. That would be the cheapest thing to do first. There is many sound clips on here, youtube, and street fire to check out.

[justbob]

try this, pics on post 14

[Bradley G]

That is the easiest and cheapest thing, that has helped others retain thier sanity.

I am not sure about any weights on the mid pipe? I know that they used all new hangers and such.

I wonder if I threw on some sort of resonators inline before the mufflers, but then what mufflers to use?? I know one of you guys on here will know what to do!!

THE DRONE MUST GO!

[PVan96]

Pics on post 14????????????? where

[PVan96]

Yes I have all of the Cats! The 02 sensors are all in there factory places, welded into the new pipe. So what If I put 2 cats back on and the factory muffs. That should give me more back pressure and since I have 1 set of cats and the resonator tips removed maybe just a little more Roar than oem??

[justbob]

sorry, i ate too much today.http://www.mercurymarauder.net/forums/showthread.php?t=43329&highlight=drone

[Vortech347]

flowmasters will have a "rattle" sound to them and will drone like crazy. My suggestion is to put on some Magnaflow's or Dynomax Ultra Flo's. You will be ALOT happier with the sound. I understand exactly what you are saying. I won't run a flowmaster muffler if I'm paid.

[DOOM]

The problem IS NOT your super 44's. Im running super 44's as well as almost EVERY other C.A.M member i know with ZERO problems. I dont think you should have removed all 4 cats, we only remove the 2nd set. And 2nd i have NEVER heard a bad sounding marauder. If DRONE is the problem have your exhaust shop extend your tips about 2 inches past your bumper and your problem will be solved.

[Marauderjack]

First thing I would do is reinstall your OEM resonator tips.....4" hollow "Megaphones" are not helping you a bit!!! :shake::argue:

Try that a few days and if you still don't like it put at least 2 cats back on...they break up exhaust pulses and help prevent your raspy "Rattle"...also required by law and don't rob any performance!!:cool:

I didn't read it anywhere but did you put an "X-Pipe" in?? If so GO BACK TO AN "H-PIPE" ASAP!!!:help: X-Pipes are inherently "RASPY" no matter what mufflers you have!!:eek:

Finally the "Dampers" that have been referred to will help drone and system "resonant vibration" but I think you have a lot of ground to cover before you need these!!:rolleyes:

Good Luck!!

Marauderjack:burnout:

[Blackmobile]

The problem IS NOT your super 44's. Im running super 44's as well as almost EVERY other C.A.M member i know with ZERO problems. I dont think you should have removed all 4 cats, we only remove the 2nd set. And 2nd i have NEVER heard a bad sounding marauder. If DRONE is the problem have your exhaust shop extend your tips about 2 inches past your bumper and your problem will be solved.

^^^What he said,^^^^^ from another super 44 owner...my sugestion is to reinstall 2 of the cats and resonated tips, and go form there.

Ed

[O's Fan Rich]

I never liked the sound of Flowmasters, but Doom Doom Doom is right, your tips should extend out a bit further.
You could also dynamat the interior, it's a nice long tedious project that works excellent.

But... what do I know.... my car sounds like chit anyway.....

[Blackened300a]

I had a GMC sonoma at one time, I put a dynomax high flow cat-back exhaust and I gutted out the cat. I hated driving the truck, It would drone, vibrate and just sound like crap! My sister has a V-6 firebird with a Borla cat-back exhaust with a high flow cat and her car sounds worse then my sonoma did. Its real raspy and just irritating to listen to at any speed. Removing the 4 cats was your number one mistake. I would put two back in and take it for a ride. That should solve the raspyness. The drone would have to do with the weights on the mufflers and the location of your tips.

[High-C]

It is 100% in the 4" tips... If you leave the 44's on and put back on your stock resonated tips, the problem will be solved. Trust me...

[chader]

for what it's worth I removed 2 cats and put on res delete tips.Still has the stock mufflers.Tips are extended past the bumper.NO droan at all.Has a slight raspy noise under full accel but I think it will sufice.

[Bluerauder]

I never liked the sound of Flowmasters, but Doom Doom Doom is right, your tips should extend out a bit further......

NATEHAWK is running the Flowmasters with the extended tips. I ran up behind him on the Capital Beltway last Saturday enroute to the CAM meet. Because it sounded loud to me, I asked him what kind of sound/drone he got inside the car. He pointed out the extended tips and said "No drone at all". That extra 2-3" does the trick.

[PVan96]

Thankyou for everyones Advice.
Monday I'll be heading to the exhaust shop again and reinstalling 2 of the cats and the stock mufflers. I feel that it will give me more back pressure but still sound a little more aggressive than stock, cause right now I wish i would of just bout a Lidio tune and kept the exhaust oem. But hey, learning from mistakes lol. How do you guys think that will sound?

Thanks again

Pat

[ctrlraven]

As far as the cats you can have 2 of the OEM ones put back on or get two Magnaflow high-flow cats put on. Putting some type of cat back on and going back tot he stock tips is going to lessen the sound just make sure they extend the tips out by about 1.5".

Flowmasters are chambered mufflers and not straight-thru mufflers like MagnaFlow so their going to have a certain area in the rpm where their going to be loud.

I have a bunch of videos with interior sound. Only exhaust mods I have are 2nd set of cats deleted, Flowmaster Super 40 series mufflers and 3.5" resonated-delete tips.
http://www.youtube.com/watch?v=Sp-thPZ3wzA

If you watch the rpms and listen to the sound you can def. figure out where the Flowmaster drone range is 2000-2500rpms.
http://www.youtube.com/watch?v=-59LbWaetYA
http://www.youtube.com/watch?v=vuh4WH1jVDU

My camera picks up a lot more sound then there really is, my drone is not that bad lol. Though going through a tunnel near by I can make people cover their ears lol.

[Hotrauder]

I had the dreaded drone up the ying yang with 2 cats X pipe and extended tips.. Went completely away with the SW long tube headers and custom H pipe...No other changes:dunno: Dennis

[scruff]

you just could,nt leave well enough alone eh lol

[Stranger in the Black Sedan]

Flowmasters drone and rasp. It is what they do. Some people like them but from your description of what you dislike, you don't. I don't either. I would never have used those mufflers. The dynomax ultraflo or a magnaflo would be my go-to muffler if you wanted some more sound than stock.

[Vortech347]

Get away from flowmaster/chambered mufflers!!

Straight through magnaflow or dynomax ulta-flo's (NOT THE TURBO's) are the way to go. Taking the flowmasters off my 550+ hp mustang and putting on ultra flo's was the best thing I ever did. Eliminated drone, made the car ALOT quieter at idle and part throttle (keep in mind its still pretty freaking loud) but then at Wide open throttle they scream. I love it. Best of all 3 worlds.

[justbob]

I still love my flowmasters.:dunno:Maybe cause i opted for the delta's? I didn't extend the pipes plus i have delete tips. Only drone i get is when cold for about two minutes tops then no drone at all. All said and done it sounds just like stock times 2 1/2.

[Black_Noise]

put the cats back on

[Marauderjack]

Uh......see post #17!!!:rolleyes:

[Georges93LX]

I had Flowmasters on my Crown Vic and they had a nice deep tone to them. I put on a Mustang off-road exhaust pipes(no cats) later and the raspy sound came out loud and clear. I would say that if you put two cats back on the raspy sound will disappear. As for the drone you will need to extend the tips and re-install the factory resonator weights by the mufflers.

[Vortech347]

Change the muff's don't put the cats back on.

Its not that thats causing the rasp its the mufflers. I've worked on and been around enough DOHC's MM's/Cobra's to know this. Change the muffs to magnaflow's or ultra-flo dynomax's.

Flowmasters are designed for SOUND not flow. I hate their name. A well designed straight through muff will double their CFM and sound better too. They are designed to be put on a car with full stock cats/exhaust and make it LOUDER/Raspier.

[ImpalaSlayer]

my opinion, these cars sound like ass with anyhting other then the stock muflers. just not a fan of how these late model fords sound

[SWOOSH]

I don't know about you guys, but I just installed my Flowmaster Super 44s, deleted my rear cats, and installed deleted tips, I drove 3 hours, and love my sound, that low hum is something else, no problems here :coolman:

[ctrlraven]

CAM is Flowmaster Country

[1stMerc]

I concur with what has been said.
IMHO, the problem with Flows is the rather thin metal used to make them. Like was said you needed to leave at least one set of cats to break up the harmonics before it made it to the mufflers. One suggestion you might try is coating them with undercoating to dull that tinny sound. As far as extending the tips i would not extend any further than an 1" since once heated during driving they will extend by another 1/2 " naturally.

[sd8683]

Does anyone know who's car it is at the last 30 seconds of the vid? And what exhaust they are running? It sounds awesome!!!!!!
http://www.youtube.com/watch?v=EkAvZ--umWs

[Aren Jay]

.............................. ........

[james1986fox]

I just had mine done and i hate the way it sounds to. I have the first set of cats emptied out and the second set deleted, flowmaster 40 series, and 3.5 delete tips extended about 2 inches and its just annoying as hell on the freeway. Kind of a higher pitch tone instead of low which is what i was looking forward too.When i had it done I drove around for a few miles with the tips cut off completely and it sounded great than i had the delete tips installed and thats when it sound like crap. If I install regular tips will that take away the high pitch noise?

[CanadaMarauder]

I have super 44's and Delete tips...Love it..Will be removing rear cats this spring with a before and after vid.
http://www.youtube.com/watch?v=Ox-9bYKd8z8

[Marauderjack]

I concur with what has been said.
IMHO, the problem with Flows is the rather thin metal used to make them. Like was said you needed to leave at least one set of cats to break up the harmonics before it made it to the mufflers. One suggestion you might try is coating them with undercoating to dull that tinny sound. As far as extending the tips i would not extend any further than an 1" since once heated during driving they will extend by another 1/2 " naturally.


UNDERCOATING.......NOT RECOMMENDED?????:flamer: :shake:

[DJCV]

Its not that thats causing the rasp its the mufflers.... Change the muffs to magnaflow's or ultra-flo dynomax's.

I think Flowmasters generally sound ok if not great OUTSIDE the vehicle, but they almost always generate lots and lots of DRONE and other undesirable harmonics INSIDE the cabin. This can make for a very unpleasant experience for the driver/passengers.

[MrBluGruv]

I've grown increasingly un-fond of the flowmaster brand, but not for any particularly scientific reason: everyone, and I mean EVERYONE, with a V8 and modified exhaust here in Texas, has some series of Flowmaster. It gets to the point where knowing the flowmaster sound comes as easy as knowing the sound of a V8. I've loved the Flowmaster sound for just about as long as I've paid attention to exhaust tone, as I'm also a fan of having an exhaust setup you can REALLY hear, I just think there are so many other options out there that people don't explore, to the point where hearing only the flows all the time makes them a little hard to stand.

Bottom line too, if you bought flowmaster mufflers for anything except tone and volume purposes, you probably don't have much business making serious custom exhaust decisions.

[RR|Suki]

Get away from flowmaster/chambered mufflers!!

Straight through magnaflow or dynomax ulta-flo's (NOT THE TURBO's) are the way to go. Taking the flowmasters off my 550+ hp mustang and putting on ultra flo's was the best thing I ever did. Eliminated drone, made the car ALOT quieter at idle and part throttle (keep in mind its still pretty freaking loud) but then at Wide open throttle they scream. I love it. Best of all 3 worlds.

Gotta disagree, super turbos are the boss, makes the car nice and quiet when cruising, and no drone even without the cats.
http://www.youtube.com/watch?v=c3JhYLR-2Qw

running
http://www.youtube.com/watch?v=hlxAdOH60s4