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Old 05-22-2007, 10:55 PM   #1
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Custom Exhaust

I got my custom exhaust done today for my 2000 porsche boxster. It has dual magnaflow mufflers. After driving it for a while, i noticed that the volume outside was perfect, but the volume inside the car was so deep toned and loud. Anyone ecounter that problem after getting a new exhaust?? any idea's on how i can lower the volume?? thanks

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Old 05-22-2007, 11:29 PM   #2
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Originally Posted by Where's my car?
I got my custom exhaust done today for my 2000 porsche boxster. It has dual magnaflow mufflers. After driving it for a while, i noticed that the volume outside was perfect, but the volume inside the car was so deep toned and loud. Anyone ecounter that problem after getting a new exhaust?? any idea's on how i can lower the volume?? thanks
Magnaflows and custom exhausts are a recipe for loudness... You could add some resonators to lower the volume.
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Old 05-22-2007, 11:48 PM   #3
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Resonators

Don't i need my CATS to pass california smog tests though??!!
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2000 Porsche Boxster
Litronics
Evo Intake
Chrome Front Grill
18" Turbo Twists
Custom Dual Magnaflow Exhaust
Custom Rear Diffuser

http://img255.imageshack.us/img255/6...umpic23bg5.gif
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Old 05-23-2007, 03:28 AM   #4
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Don't i need my CATS to pass california smog tests though??!!
I think by resonators, he means sticking drag pipe inserts into the tips of your muffler to help drown out the drone. The factory exhaust is designed to be rid of any annoying resonance drone that you are experiencing inside the cabin. Your aftermarket setup is not designed specifically for the Boxster, and probably utilizes two separate universal fit muffler cans welded together with a crossbar. These might sound nice on the outside, but will give you really bad interior drone that will drive you batty after long drives, give you headaches, or worse, even hearing loss after extended use.

The only sports exhausts I know of that don't give you that annoying interior resonance are the factory Porsche Sports Exhaust (PSE), the Dansk Pressed Sport exhausts (as these are made in the same shape/design as the factory mufflers), or the DIY modified factory exhausts made by welding bypass pipes connecting the muffler inpipe to the tips. All other sports exhaust have some sort of interior cabin resonance, but many live with it by keeping the revs of the engine higher in the rev range where the drone is not noticeable.
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Old 05-23-2007, 03:55 AM   #5
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Originally Posted by Where's my car?
I got my custom exhaust done today for my 2000 porsche boxster. It has dual magnaflow mufflers. After driving it for a while, i noticed that the volume outside was perfect, but the volume inside the car was so deep toned and loud. Anyone ecounter that problem after getting a new exhaust?? any idea's on how i can lower the volume?? thanks
Sorry, not much you can do about the drone. If you had done some research you would have learned that several of us have built custom exhausts (for various reasons) and yes, they all drone. Sorry.
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Old 05-23-2007, 12:02 PM   #6
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Your pretty much out of luck.

On typical front engine cars, people add resonators to get rid of drone.

(looks like a glass pack, ex. you'll see 2" piping bulge out into a 12" section of 3" piping then back down to 2" piping. possibly multiple shorter resonators.)

They act like mini mufflers.

On a Boxster, you just don't have the space to add a few of these.
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Old 05-23-2007, 12:11 PM   #7
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I plan on making my own using borla mufflers, but it will be clamp on rather than welded so i can change mufflers in the future if i wish to.
Anyone know of any other muffler brands that will sound really good? I would like to get somethign that sounds like ferrari-ish
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Old 05-23-2007, 12:44 PM   #8
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pixi glass shield

do u think, that if i were to build some sort of glass shield in the trunk that would help? or anywhere else
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2000 Porsche Boxster
Litronics
Evo Intake
Chrome Front Grill
18" Turbo Twists
Custom Dual Magnaflow Exhaust
Custom Rear Diffuser

http://img255.imageshack.us/img255/6...umpic23bg5.gif
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Old 05-23-2007, 01:36 PM   #9
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Bleh

I don't know ANYONE AT ALL HAVE A SOlUTION to getting rid of the drone in the cabin, i will forever be thankful
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Litronics
Evo Intake
Chrome Front Grill
18" Turbo Twists
Custom Dual Magnaflow Exhaust
Custom Rear Diffuser

http://img255.imageshack.us/img255/6...umpic23bg5.gif
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Old 05-23-2007, 01:37 PM   #10
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Originally Posted by Where's my car?
do u think, that if i were to build some sort of glass shield in the trunk that would help? or anywhere else
You can add some Dynomat behind the belt cover. You know the shield that is behind the seats that gives you access to the serpantine belts.
If you add some Dynomat there on top it should make the noise level lower.

Last edited by porsche986spyder; 05-23-2007 at 01:44 PM.
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Old 05-23-2007, 04:25 PM   #11
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Yes. What you have is called drone. How much did you pay for this custom job? Fabspeed has a high performance system that they guarantee is 50 state emissions legal and does not have drone. And I hear it sounds great. I plan on buying it soon.
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Old 05-24-2007, 02:46 AM   #12
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Originally Posted by CJ_Boxster
I plan on making my own using borla mufflers, but it will be clamp on rather than welded so i can change mufflers in the future if i wish to.
Anyone know of any other muffler brands that will sound really good? I would like to get somethign that sounds like ferrari-ish
Which Ferrari? A flat-12 Ferrari, a V-8 Ferrari or a V-12 Ferrari?

You're not going to be able to make a flat-6 sound like any Ferrari. Period. Sorry. Just love the sound you have.

In terms of the drone, no amount of dynamat or shielding is going to eliminate the drone. You need two things - carefully thought-out chambering and exhaust path length. Most of us do not have the resources or experience to design something like this.
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Old 05-24-2007, 04:01 PM   #13
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4 bills
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2000 Porsche Boxster
Litronics
Evo Intake
Chrome Front Grill
18" Turbo Twists
Custom Dual Magnaflow Exhaust
Custom Rear Diffuser

http://img255.imageshack.us/img255/6...umpic23bg5.gif
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Old 05-24-2007, 04:21 PM   #14
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Quote:
Originally Posted by John V
Which Ferrari? A flat-12 Ferrari, a V-8 Ferrari or a V-12 Ferrari?

You're not going to be able to make a flat-6 sound like any Ferrari. Period. Sorry. Just love the sound you have.

In terms of the drone, no amount of dynamat or shielding is going to eliminate the drone. You need two things - carefully thought-out chambering and exhaust path length. Most of us do not have the resources or experience to design something like this.
Well i dont expect it to sound just like one but wasnt there thread not too long ago here for a certain brand of exhaust that was super pricey for a 987 and someone said it sounds like a ferrari and someone else said its cause the manufactor of that muffler also makes the mufflers for Ferrari's... Wish i could see how they looked inside, which would help alot.
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Old 05-24-2007, 04:57 PM   #15
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I'm sorry - regardless of exhaust system - if somebody ever tells you they have a Boxster that sounds like a Ferrari, instruct them to locate said "Ferrari" which bears the same sound and have them demonstrate. Ain't gonna happen.

A flat-6 can have its own distinctive wail (ever hear a 996 GT3 with straightpipes at redline? Amazing) but it sounds nothing like any Ferrari.

/rant.
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Old 05-24-2007, 08:51 PM   #16
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i dunno man, i get annoyed over the sound of a ferrari after a while. But don't get me wrong, i love the car. I like the Lamborghini Gallardo sound too
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2000 Porsche Boxster
Litronics
Evo Intake
Chrome Front Grill
18" Turbo Twists
Custom Dual Magnaflow Exhaust
Custom Rear Diffuser

http://img255.imageshack.us/img255/6...umpic23bg5.gif
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Old 05-25-2007, 09:22 AM   #17
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Cabin Droning Driving Me nuts!!!! SOmeone please come up with a solution, to allow to me both keep the exhuast and muffle the sound in the cabin
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Whats a Porsche?

2000 Porsche Boxster
Litronics
Evo Intake
Chrome Front Grill
18" Turbo Twists
Custom Dual Magnaflow Exhaust
Custom Rear Diffuser

http://img255.imageshack.us/img255/6...umpic23bg5.gif
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Old 05-25-2007, 09:30 AM   #18
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Originally Posted by Where's my car?
Cabin Droning Driving Me nuts!!!! SOmeone please come up with a solution, to allow to me both keep the exhuast and muffle the sound in the cabin
put the top down (and turn up the stereo)
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Old 05-25-2007, 09:46 AM   #19
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Originally Posted by Where's my car?
Cabin Droning Driving Me nuts!!!! SOmeone please come up with a solution, to allow to me both keep the exhuast and muffle the sound in the cabin
There's no way you're gonna get rid of that drone. But...to keep the exhaust and muffle the sound in the cabin, you can....

....just wear EARPLUGS when you drive. At least you'll sound cool to others around you.
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Old 05-25-2007, 10:08 AM   #20
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Originally Posted by Where's my car?
Cabin Droning Driving Me nuts!!!! SOmeone please come up with a solution, to allow to me both keep the exhuast and muffle the sound in the cabin
You're not going to solve the drone. Sorry. It's just not going to happen.

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