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Thread: !! FSWERKS Stealth Exhaust After 10 months !! Reply to Thread
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Topic Review (Newest First)
03-27-2013 05:00 PM
asting See http://www.focusfanatics.com/forum/showthread.php?t=284705
03-27-2013 03:39 PM
Picoletray
Quote:
Originally Posted by maalox View Post
That may not be the exhaust. I had a noise coming from under the car at that speed as well, which the dealer diagnosed as a loose exhaust heat shield. I haven't heard a thing since that was corrected. My car is stock, but it's possible one of the shields on yours came loose during the exhaust install. Just something to check.
When I was under the car, I checked every sheild, and even gave the one near the rear A frame(?) a little taper because it was extra long and straight vertical.

anyways, not likely, they all seemed properly fastened and tight.

Quote:
Originally Posted by asting View Post
What part sticks out the most? Perhaps a skid plate/valence would help.
Do you know of one that is available to bolt on?

I will say after reading a bit of aero-modding material, that gap between the rear bumper and the rear axle is very large air pocket now that the muffler is gone. Nothing is there to sort of steer the air under that lip of plastic that is the "bumper" that could be causing an eddie at high speeds....
03-27-2013 03:10 PM
asting What part sticks out the most? Perhaps a skid plate/valence would help.
03-27-2013 03:08 PM
Focusblackzx5 Why it's getting louder with time ? My magnaflow 2.25'' was okay at the biggining and now after 6 months it's loud as hell ahah.

Nice sound tho I love it :)
03-27-2013 02:57 PM
maalox
Quote:
Originally Posted by Picoletray View Post
IDK, IDK, and IDK. lol. Most company's don't do mod's at all, I doubt they are cutting deals on the extra work involved with the double resonator.

Interestingly, at 75+ MPH i beleive there is a flaw. I hear wind turbulance under the car. The factory exhaust system tucks up perfectly into the raceway that ford built into the car and the oem parts are more aero with tapered edges. The fswerks system is a pipe welded to a larger cylinder with no taper, and I am becoming convinced that is the sound I'm hearing at those high speeds. It's mild, not loud, but it's there. I'm not sure if that is normal, but I might be adding some tapers to test it all out...maybe.

The plus side is that car is over 1500 miles now and my mpg has hit 35 average.
That may not be the exhaust. I had a noise coming from under the car at that speed as well, which the dealer diagnosed as a loose exhaust heat shield. I haven't heard a thing since that was corrected. My car is stock, but it's possible one of the shields on yours came loose during the exhaust install. Just something to check.
03-27-2013 01:50 PM
Picoletray
Quote:
Originally Posted by asting View Post
Hmm not bad. Is it quieter than the stock exhaust? Do you think they would do a package deal with this exhaust and their intake? If not, do they ever run coupons?
IDK, IDK, and IDK. lol. Most company's don't do mod's at all, I doubt they are cutting deals on the extra work involved with the double resonator.

Interestingly, at 75+ MPH i beleive there is a flaw. I hear wind turbulance under the car. The factory exhaust system tucks up perfectly into the raceway that ford built into the car and the oem parts are more aero with tapered edges. The fswerks system is a pipe welded to a larger cylinder with no taper, and I am becoming convinced that is the sound I'm hearing at those high speeds. It's mild, not loud, but it's there. I'm not sure if that is normal, but I might be adding some tapers to test it all out...maybe.

The plus side is that car is over 1500 miles now and my mpg has hit 35 average.
03-26-2013 04:07 PM
asting
Quote:
Originally Posted by Picoletray View Post
As requested click on the link to hear it from in cabin. I'll try to get pic's eventually.

http://www.youtube.com/watch?v=HTdfB4xNRSo
Hmm not bad. Is it quieter than the stock exhaust? Do you think they would do a package deal with this exhaust and their intake? If not, do they ever run coupons?
03-26-2013 02:41 PM
Picoletray As requested click on the link to hear it from in cabin. I'll try to get pic's eventually.

http://www.youtube.com/watch?v=HTdfB4xNRSo
03-20-2013 01:29 PM
suss6052
Quote:
Originally Posted by Picoletray View Post
Each resonator is about 18 inches long. A resonator is simply a double wall perforated tube with insulation. These are used in many hvac systems such as auditoriums and library's, and the more surface area you bounce the noise through, the more sound you reduce. They work better with wind/turbulence noise then with pistons exploding in an engine noise, but I have a fairly educated guess that it is quieter to have 2 resonators then to have one.

What I'm saying is that based on this experience it is unlikely that adding the second vibrant style small bore/ thin wall resonator would take any of the drone away. Adding in an additional muffler or resonator on my old car when it was droning might have changed the exhaust tone a bit until it burned in, but it did not fix the drone, and it was still very very loud.

The resonator would have less effect than a muffler in terms of sound absorbance.

I'm open to being surprised to find that it does work, but for $150 I'd rather have an additional muffler in the stock lunch box location and a right side rear exit as this would do more to fix the drone than just adding another resonator in line with the first one.

If you have some in car videos for reference it might help, but just based on what I've seen happen before it seemed unlikely to me to actually solve it like you say it has done.
03-20-2013 01:15 PM
Picoletray
Quote:
Originally Posted by suss6052 View Post
I had gotten a response, but I'm not convinced its worth the cost of a second stealth section. FSWerks wants $149.95 for a second resonator welded into the kit. $69.95 for the resonator and $80 to weld it in.

Having ridden in a car with the standard FSWERKS stealth kit I don't believe that adding in another identical resonator would actually do anything to quiet the exhaust or do enough to fix the drone that was exhibited. At least not until hearing it for myself.
Each resonator is about 18 inches long. A resonator is simply a double wall perforated tube with insulation. These are used in many hvac systems such as auditoriums and library's, and the more surface area you bounce the noise through, the more sound you reduce. They work better with wind/turbulence noise then with pistons exploding in an engine noise, but I have a fairly educated guess that it is quieter to have 2 resonators then to have one.
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