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SuperDad
07-26-2007, 08:12 PM
I just had a complete exhaust manifold back system installed. 2.5 from the manifolds, to magnaflow high flow cats into a magnaflow resinator, 3 inch out, split into 2.5 to Borla PRO XS Mufflers.
It sounds soooo ricey. Mostly inside the car. I'm not sure if it's a drone inside, but it's very loud, (annoying). I thought putting in the resonator eliminates the drone (from what I've read on this site). My muffler shop guy said, if we remove the resonator, that might eliminate the drone inside. What do you guys think.:(

sinhumane
07-26-2007, 08:20 PM
thats the exact opposite of what you want to do... ask them to do an 'x' pipe after the res.. and get some magnaflow or flowmaster muffs... borla will sound kinda ricey. i'd also say go for a smaller diameter pipe.. maybe 2 1/4 all the way.

rzibilske77
07-26-2007, 08:26 PM
i agree, removing the resonator will cause a strong ricey sound, it must be those borlas causing the drone because the rest of your setup is a popular pick for most owners....i have the same setup with dynomax super turbo muffs

SuperDad
07-26-2007, 09:01 PM
i agree, removing the resonator will cause a strong ricey sound, it must be those borlas causing the drone because the rest of your setup is a popular pick for most owners....i have the same setup with dynomax super turbo muffs

I said the same thing to the shop guy & he doesn't think it's the mufflers. I feel it is the mufflers. I know this maybe crazy, but, would putting the stock mufflers back on, get rid of the noise. I wanted a deeper sounding exhaust, but at this point I would take the stock (no noise sound) back.:cool:

XR7 Dave
07-26-2007, 09:11 PM
The stock mufflers are not all that bad and they will sound much better. That's the cheap way out. The other option is to get some turbo style mufflers. Borla's typically do not sound good on our cars unless you manage to stuff the really long ones under there.

SuperDad
07-26-2007, 09:19 PM
I hope I can get the stock ones back before they get thrown out! I don't necessarily have a problem replacing the mufflers with some turbos, but I would hate to do that and have the same sound the same.

rickbtbird
07-26-2007, 09:29 PM
On my 90 auto with SPC hi flow cats into a magnaflow resinator with a 2.25 flow master force II it sounds excellent until I get it up around 65-75mph. With "Fat Butt" :eek: in the car it gets louder in the cocpit but mellows out at 80. When I'm by myself from 80 to 120 it sounds wicked nice. :D I haven't gone beyond that.

SuperDad
07-26-2007, 09:42 PM
On my 90 auto with SPC hi flow cats into a magnaflow resinator with a 2.25 flow master force II it sounds excellent until I get it up around 65-75mph. With "Fat Butt" :eek: in the car it gets louder in the cocpit but mellows out at 80. When I'm by myself from 80 to 120 it sounds wicked nice. :D I haven't gone beyond that.

How loud is it inside under normal driving? Do you hear any sound? (or minimal noise?)

rickbtbird
07-26-2007, 10:03 PM
How loud is it inside under normal driving? Do you hear any sound? (or minimal noise?)

Normal, what do you mean :p normal? From 0-55 it's throaty and beyond that until I hit 80 I turn up the radio to drown out the drone.

SuperDad
07-26-2007, 10:24 PM
Normal, what do you mean :p normal? From 0-55 it's throaty and beyond that until I hit 80 I turn up the radio to drown out the drone.

I will have to drive it some more to see if if it's ricey or throaty! I really think it's ricey though. It reminds me of Honda Civic cruising by me. Ricey, Huh?:confused:

rickbtbird
07-26-2007, 10:28 PM
I will have to drive it some more to see if if it's ricey or throaty! I really think it's ricey though. It reminds me of Honda Civic cruising by me. Ricey, Huh?:confused:
Personally I cringe when I hear that sound. You better not let the cops hear it either. You may get a ticket just because it sounds like one. :D

SuperDad
07-26-2007, 10:46 PM
Let me get some opinions.........
Should I go with the (almost) sure thing & put the stock ones back on?
Or, go with a Turbo style, (flowmaster ect.)?
I originally went with the Borla's because they were supposed to be a little quieter than the Turbo style. I'm all confused now:rolleyes:

XR7 Dave
07-26-2007, 11:01 PM
Let me get some opinions.........
Should I go with the (almost) sure thing & put the stock ones back on?
Or, go with a Turbo style, (flowmaster ect.)?
I originally went with the Borla's because they were supposed to be a little quieter than the Turbo style. I'm all confused now:rolleyes:

The ability of a muffler to be quiet is a function of size. A bigger muffler is quieter. There are big Borla's and there are small Borla's. I don't know if you want to spend the money to try the bigger Borla's or not. It seems to me that the stock mufflers are probably right up your alley.

SuperDad
07-26-2007, 11:14 PM
The ability of a muffler to be quiet is a function of size. A bigger muffler is quieter. There are big Borla's and there are small Borla's. I don't know if you want to spend the money to try the bigger Borla's or not. It seems to me that the stock mufflers are probably right up your alley.

Thanks, I tend to agree. I also went with the smaller mufflers so they would fit up their nicer, rather than going sideways. Next question, should I utilize the stock ones he took off (120K on them), or get some new aftermarket ones?

Mike8675309
07-26-2007, 11:22 PM
If the ones taken off are just fine, well use them. if they have stuff loose inside, or are old enough you think they might need to be replaced soon, replace them.

My bet is that most of your drone is due to down turns in the exhaust pipe. The high frequency sound bounces off the ground and comes into the cabin. Have them try to aim the down turns back and not so straight down. When I get more time I'm gonna have mine run out the back through the valance.

And yes, 19" borla minimum for a decent sound, and a Stainless steel muffler like that is gonna be a waste if you're not also doing the rest of the system in stainless steel.

A generic turbo muffler replacement at most exhaust shops won't be that bad either.

SuperDad
07-26-2007, 11:35 PM
If the ones taken off are just fine, well use them. if they have stuff loose inside, or are old enough you think they might need to be replaced soon, replace them.

My bet is that most of your drone is due to down turns in the exhaust pipe. The high frequency sound bounces off the ground and comes into the cabin. Have them try to aim the down turns back and not so straight down. When I get more time I'm gonna have mine run out the back through the valance.

And yes, 19" borla minimum for a decent sound, and a Stainless steel muffler like that is gonna be a waste if you're not also doing the rest of the system in stainless steel.

A generic turbo muffler replacement at most exhaust shops won't be that bad either.

Makes sense & you are right about the down pipes, they turn straight down. He did that so the fumes would not get caught up in the bumper & get in the cabin! I wonder if I could put some temporary pipe extensions on, to test your theory! Thanks:rolleyes:

sdw
07-26-2007, 11:35 PM
I too have the same problem.

The previous owner removed the resonator and added some local (?) brand of muffler (V force http://www.flopro.com/VForce.htm).

The drone at 2000 rpm (aka 120km/hr) is bad, especially for an outside salesman. Would the re-addition of the resonator help?

sean

SuperDad
07-26-2007, 11:55 PM
I too have the same problem.

The previous owner removed the resonator and added some local (?) brand of muffler (V force http://www.flopro.com/VForce.htm).

The drone at 2000 rpm (aka 120km/hr) is bad, especially for an outside salesman. Would the re-addition of the resonator help?

sean

I'm not sure if the resonator is helping me at this point, I will keep you posted on any changes I make to my system.

XxSlowpokexX
07-27-2007, 01:41 AM
I had an exhaust with stock mufflers and no resonator and high flow cats and it was very ricey sounding..Sounded liek an accord on roids.

I would hate to see you spend some extra dough to still be dissapointed. A dynomax turbo muffler or any cheap turbo muffler will quiet it down substantially I feel. At liek 15 $ a pop its better then ading stock back on which in my experience do little muffling.

Interestingly enough my current SC has a flowmaster resonator and it sounds great..High flow cats kooks headers flowmaster resonator and dynomax..Reall quiet..Still get a buzz but a low frequency one

I have a video of my car on here..You can here the exhaust

http://www.motortopia.com/garage/cars/Xmetalgodnyc

Tickler
07-27-2007, 01:53 AM
Turbo's, Stainless or aluminized, are you talking chambered mufflers or "flow through"? Let me tell you; The straight through mufflers sound good at idle and thats about it, unless your pimping mods, in which case it will sound like an angry chainsaw on crack.

thunderkid84
07-27-2007, 02:22 AM
i also say either go with the biggest(lonest) borla, magnaflow or dynomax you can fit in there. or just throw the stockers back on to see how it sounds.

reducing your pip to 2.25" i think will also make a slight difference.

94blksc
07-27-2007, 05:26 AM
Reducing your pipe size would only make your pitch higher, the lessor diameter forces the gasses out faster, therefore increasing the pitch of the exhaust note, a larger diameter exhaust on the other hand slightly slower velocity allowing a longer sound wave to travel, remember longer sound waves equals lower note. you can think of it as a guitar string, the more you restrict it (turn to tighten the string) the higher the note, the more you free it (loosen the string) the deeper the note.

Daspanka
07-27-2007, 07:53 AM
I went with a 2.5" straight downtube (no emissions in Al.) into a flowmaster resonater. My exhaust is stock from the res back. Sounds really good (to me) has a nice growl to it, but not ricey.

kenewagner
07-27-2007, 08:27 AM
I did my own exhaust and than redid 3 more times. I was ready to sell the car if I couldnt get away form the drone. I have 21/2 down tubes a resonator, 3" out than split in the rear to two mufflers. I had a set of 21/2"turbo mufflers on. I sold them and went to the part store and bought a set of off the shelf aftermarket mufflers (21/2") and the drone went away. You need the resonator as previously said but if you have a drone than it is the muffler. I also was told that aiming the tips down was part of the problem. I tried it both way straight out and aimed down. There was no diffrence in the drone. A plain nothing special aftermarket muffler and I was back in love with my car

Ken

kenewagner
07-27-2007, 08:29 AM
I went with a 2.5" straight downtube (no emissions in Al.) into a flowmaster resonater. My exhaust is stock from the res back. Sounds really good (to me) has a nice growl to it, but not ricey.

Yours sounds good, just because the engine looks so good:D

Ken

XR7 Dave
07-27-2007, 08:59 AM
I had an exhaust with stock mufflers and no resonator and high flow cats and it was very ricey sounding..Sounded liek an accord on roids.


No one was talking about running stock mufflers without a resonator. Yes, running stock mufflers without a resonator would not be a good choice. The mufflers that Ken is talking about are rather restrictive which is why they are quiet. Ford actually put some effort into the stock muffler design. If you've ever taken one apart you'd see the tuned chambers inside that are specifically designed to work with the sound of the V6. Aftermarket mufflers are all designed to sound good on a V8 which is where our problem lies.

Also, early SC's have 2.25" mufflers whereas the late model ones have 2".

V8Supercoupe
07-27-2007, 09:28 AM
What Mike said.

I have two Big Borlas out back with an Xpipe and have virtually no drone at all.

sail7seas
07-27-2007, 02:12 PM
I was told the 2000rpm drone in the cabin is mostly caused by the single 3" pipe.

I wonder if dual exhaust get's rid of the drone problem? (though not a problem with Borla's)

I concur the stock mufflers are the quietest. (quieter than 19" Borla)

I substituted the resonator Magnaflow with a 19" Borla and it quieted down 50 %, but louder than stock.

I was unhappy with the ground clearance of my magnaflow resonator.
Do the MATH for ground clearance.
Borla 4" deep vs Magnaflow is 6" deep. (+clearance to chassis)

Borla ProXS muffler for resonator #40349 (4"x9.5"x19")
(dual 2 1/2" in, 3" out)
Bought from 21st Century Exhaust, Boynton Beach, FL 33426 (for $70+shipping)
800-two seven six - six three nine nine

www.borla.com
Borla Turbo XL mufflers are (4"x9.5 x 19) part# 40665
(center/offset, 2 1/2"in / 2 1/2"out)

V8Supercoupe
07-27-2007, 02:18 PM
After reading the above post, let me add that I have a true dual setup with an xpipe. 2.5" all the way. 2 CATCO cats.
I have no complaints at all. There are sound files floating around here that shows George Davenports SWB on a dyno and you can hear what it sounds like. Of course....you'll have to take our word for it (those who have a similar setups) that there isn't much if any drone.

Mike8675309
07-27-2007, 08:11 PM
I'm gonna try to record both my cars this weekend. Problem is that video cameras just don't have a decent mic so they tend to make everything sound like junk.

The 93 has cat back Magnaflow with stock converters still on there. (soon to be gone)
The 90 has custom SS 2.5 to 3 to 2.5 into dual Borla 19" long mufflers.

Both of them are noisy in the cabin but not so much a drone but a hum. Dave road in the 90 for a while, but I forgot to ask him what he thought of the noise as far as a cause. I once had a piece of cardboard in the driveway under the rear that was just under the exhaust tips. It was much quieter in the cab with that cardboard there and got noticeably louder when I pulled away. That's what has lead me to consider re-doing the tips as I believe much of what I hear going down the road is reflected sound.

SuperDad
07-28-2007, 11:41 AM
I'm gonna try to record both my cars this weekend. Problem is that video cameras just don't have a decent mic so they tend to make everything sound like junk.

The 93 has cat back Magnaflow with stock converters still on there. (soon to be gone)
The 90 has custom SS 2.5 to 3 to 2.5 into dual Borla 19" long mufflers.

Both of them are noisy in the cabin but not so much a drone but a hum. Dave road in the 90 for a while, but I forgot to ask him what he thought of the noise as far as a cause. I once had a piece of cardboard in the driveway under the rear that was just under the exhaust tips. It was much quieter in the cab with that cardboard there and got noticeably louder when I pulled away. That's what has lead me to consider re-doing the tips as I believe much of what I hear going down the road is reflected sound.

I was thinking the exact same thing about the cardboard idea, trying to direct the sound away from the ground (or car) to see if that made any improvement. I am going to try it in a little while.

Toms-SC
07-28-2007, 02:28 PM
You can extend the tips past the rear valence(temporarily) with a couple of empty beer/pop cans held on with muffler clamps.

.On a 95 sc auto,2.25 " downpipes,no cats,magnaflow resonator,3" out single split into 2 long walker (approx 20" )rear mufflers,doing this decreased to drone by a good 50%.

SuperDad
07-28-2007, 05:41 PM
I just tried directing the sound away with some cardbord boxes & and it did make a little difference. Not enough to go cutting away my bumper to put some tips on it.
I will try the beer can trick to see if that makes a bigger difference.
I am 99% sure the noise getting into the cabin is the mufflers. After driving for about 15 minutes, I am pretty sure there is no drone directly under me. It is just a shock going from a very quiet exhaust, to a very open one. I cannot live with this either. I am going to replace the Borlas with some quieter, stock type.
I must say, the performance is awesome with the new exhaust, plus the addition of an scp fresh air induction sytsem, I can really feel the difference in accelleration. I'm hoping a quieter, more restrictive muffler, won't take to much away from my new found power!

SuperDad
07-28-2007, 06:25 PM
I am having second thoughts about the air flowing out the rear. I used the beer can trick & I did notice a bigger difference in noise. I did not take it for a drive yet, but I am going an auto part store, get some flexable pipe & put it on. The beer cans only extended it a little bit (an inch past the bumper), so I want to see if going out a little farther makes a bigger difference. Does anyone have pictures of exhausts, through the bumpers?

thunderkid84
07-28-2007, 07:18 PM
how long are the borla's you have on there now ?

SuperDad
07-28-2007, 08:05 PM
how long are the borla's you have on there now ?

14" borlas
I can definately say the noise is coming from the mufflers.
I found some 2-1/2 pvc pipe laying around the house. Used a couple of 90 degree elbows and 36" extensions, started her up & it sounded like the original stock set-up, nice & quiet inside. That is quite a relief, I must say, although I don't have the throaty sound I originally wanted. Atleast I am making progress. I know now I have to either change the mufflers or add extensions, either way I go I will have to put extensions straight out to get the sound away from the cabin.:)

thunderkid84
07-28-2007, 08:34 PM
ahh...so the key to getting rid of drone is in the exhaust tips

SuperDad
07-28-2007, 08:40 PM
ahh...so the key to getting rid of drone is in the exhaust tips

So it seems. I just don't no how much exhaust tips will help.:rolleyes:. The beer cans I put on earlier (which were approximately, equivilant to extensions) did not do enough to justify butchering my rear ground effects!.

Daspanka
07-28-2007, 08:44 PM
Yours sounds good, just because the engine looks so good:D

Ken

HeHe. Thanks Ken! The insurance Co. paid off for the accident, so I banged the sheetmetal back in place myself and am spending the money on more goodies:D Big aluminum RAD (with polished tanks, of course!) pulleys, etc. More underhood bling is on the way.
Back to the thread topic.
What superdad is going through is EXACTLY why I'm terrified to replace the back of the exhaust. Some of the guys are telling me that the stock single pipe and mufflers are too restrictive, but it doesn't seem to be (I lost three pound of boost at the top when I installed the resonator). And the sound is spot on with the stock mufflers. Too many guys spend $300-$500 from the res back and then HATE the sound, even if it does flow well

Daspanka

Daspanka
07-28-2007, 08:53 PM
I am having second thoughts about the air flowing out the rear. I used the beer can trick & I did notice a bigger difference in noise. I did not take it for a drive yet, but I am going an auto part store, get some flexable pipe & put it on. The beer cans only extended it a little bit (an inch past the bumper), so I want to see if going out a little farther makes a bigger difference. Does anyone have pictures of exhausts, through the bumpers?

Too bad you figured this out so quickly. It would have been a priceless sight to see an SC cruising down the highway with beer cans for exhaust tips:D
Hey, that would really throw the ricers off. Instead of "Fart cans", Bud light cans:p

SuperDad
07-28-2007, 08:56 PM
HeHe. Thanks Ken! The insurance Co. paid off for the accident, so I banged the sheetmetal back in place myself and am spending the money on more goodies:D Big aluminum RAD (with polished tanks, of course!) pulleys, etc. More underhood bling is on the way.
Back to the thread topic.
What superdad is going through is EXACTLY why I'm terrified to replace the back of the exhaust. Some of the guys are telling me that the stock single pipe and mufflers are too restrictive, but it doesn't seem to be (I lost three pound of boost at the top when I installed the resonator). And the sound is spot on with the stock mufflers. Too many guys spend $300-$500 from the res back and then HATE the sound, even if it does flow well

Daspanka

If I had to do it again I would have probably just replaced the front end of the exhaust system, including the resinator, then hooked up somewhere with the stock system. Good news with this new exaust system I have now, I seem to have gained a couple of extra pounds of boost, (odd, I thought I would loose some boost with the free flowing exhaust).

SuperDad
07-28-2007, 08:59 PM
Too bad you figured this out so quickly. It would have been a priceless sight to see an SC cruising down the highway with beer cans for exhaust tips:D
Hey, that would really throw the ricers off. Instead of "Fart cans", Bud light cans:p

Yes, that would have been funny, but I think an even funnier sight would have been me cruising down the street with 3 feet of grey PVC as exhaust tips!!!!:eek:

Daspanka
07-28-2007, 09:15 PM
Yes, that would have been funny, but I think an even funnier sight would have been me cruising down the street with 3 feet of grey PVC as exhaust tips!!!!:eek:

Alright, you've got to stop this:p
I almost pi$$ed my pants laughing about the Bud Light exhaust tips. Now I just blew tea through my nose when I read this:D
Hey, you better watch it, with beer cans and PVC pipe hooked up to the back of your car, the cops will think you're from Alabama:p (Damn, did I just hear the Deliverence banjo's)
If we could just figure out a way to rig up a pair of Jack Daniels bottles. Hmm......

Toms-SC
07-28-2007, 09:22 PM
Miller lite cans reduce the exhaust turbulence the most,giving the best sound and power.

S_Mazza
07-28-2007, 09:49 PM
Maybe you can try some of those flattened, rectangular tips. That might let you get it out back without giving up too much ground clearance or cutting the valance (they are so hard to come by, I wouldn't do it). Hey, why not get some roofing tin and fab some up?

rickbtbird
07-28-2007, 10:31 PM
Alright, you've got to stop this:p
I almost pi$$ed my pants laughing about the Bud Light exhaust tips. Now I just blew tea through my nose when I read this:D
Hey, you better watch it, with beer cans and PVC pipe hooked up to the back of your car, the cops will think you're from Alabama:p (Damn, did I just hear the Deliverence banjo's)
If we could just figure out a way to rig up a pair of Jack Daniels bottles. Hmm......

Back in the day I use to patch the exhaust of my 1971 MGB with tin can containers and the window washer fluid was a 16oz bottle of Genesee Cream Ale.

Daspanka
07-28-2007, 10:49 PM
Maybe you can try some of those flattened, rectangular tips. That might let you get it out back without giving up too much ground clearance or cutting the valance (they are so hard to come by, I wouldn't do it). Hey, why not get some roofing tin and fab some up?


Victor has some somewhat flattened oval shaped tips for only $10. Heavy chrome too. I just bought a set from his ebay store.

Daspanka

SuperDad
07-29-2007, 01:44 AM
Thanks guys, that's some good stuff there, I will be on the lookout for some tips. I saw a picture on another thread were the guy cut out ovals in the center of the valance. I definately don't want to go to that extreme. I'd prefer not to cut anything, but maybe as suggested, get some flattened tips & do just a little modifying:cool:

kenewagner
07-29-2007, 12:37 PM
I am having second thoughts about the air flowing out the rear. I used the beer can trick & I did notice a bigger difference in noise. I did not take it for a drive yet, but I am going an auto part store, get some flexable pipe & put it on. The beer cans only extended it a little bit (an inch past the bumper), so I want to see if going out a little farther makes a bigger difference. Does anyone have pictures of exhausts, through the bumpers?


I dont think extending your exhaust back will completely get rid if the drone. In my case it didnt, It will help a little. Dave is right about the stock muffler being a little more restricive. I didnt know the stock muffler was free flowing in design from the factory. Learn something everyday. I remember the stock mufflers being 2", I could be wrong about that. Anyway I felt that big 21/2" stock mufflers woud still be an improvement to the little mufflers. My system is headers with 21/2" pipes all the way with the center 3". My car also sounds great, in my opinion. I doubt that my mufflers create a problem to a free flowing exhaust. If my engine starts cranking out 437 RWHP like some claims:rolleyes: I might revisit my muffler claim and upgrade. Here are a few pictures of the tips on mine. I fabricated the tips myself as I could find tips like I wanted. And tips that I did like somewhat were ungodly expensive. The pictures are not the best as I had to resize them.

Ken

sinhumane
07-29-2007, 01:10 PM
i heard the most awesome exhaust on a capri last night... he transplanted a cougar 3.8 into it... he had mustang shorty headers, 2" downtubes
(no cats) h-pipe, 19" flowmaster resonators... straight back to borla tips.... it sounded SICK.. nice and quiet at idle.. a decent throaty growl at wot... definitely wat i'm gonna go with.

SuperDad
07-29-2007, 01:31 PM
I dont think extending your exhaust back will completely get rid if the drone. In my case it didnt, It will help a little. Dave is right about the stock muffler being a little more restricive. I didnt know the stock muffler was free flowing in design from the factory. Learn something everyday. I remember the stock mufflers being 2", I could be wrong about that. Anyway I felt that big 21/2" stock mufflers woud still be an improvement to the little mufflers. My system is headers with 21/2" pipes all the way with the center 3". My car also sounds great, in my opinion. I doubt that my mufflers create a problem to a free flowing exhaust. If my engine starts cranking out 437 RWHP like some claims:rolleyes: I might revisit my muffler claim and upgrade. Here are a few pictures of the tips on mine. I fabricated the tips myself as I could find tips like I wanted. And tips that I did like somewhat were ungodly expensive. The pictures are not the best as I had to resize them.
.
Ken

Ken,

Thanks for the input, Your exhaust tips look GREAT, I would be very happy with that look. Definately the cleanest job I've seen. I like that square look. I'm wondering, did you put them on after you had a noise problem, or did you put them on right away for the look? If so, did you notice a difference in cabin noise? By chance, do you have any pictures of under the muffler, where the tips connect to the muffler?
You mentioned you have 2-1/2 stock mufflers, did you get them from Ford? You are right about the stock mufflers that came on the car, they are 2". How long are your mufflers?

Jim

SuperDad
07-29-2007, 01:34 PM
Victor has some somewhat flattened oval shaped tips for only $10. Heavy chrome too. I just bought a set from his ebay store.

Daspanka

I would be curios to see, who is Victor, & where can I fin him at Ebay?

ThunderDave
07-29-2007, 01:56 PM
The stock mufflers are not all that bad and they will sound much better. That's the cheap way out. The other option is to get some turbo style mufflers. Borla's typically do not sound good on our cars unless you manage to stuff the really long ones under there.

That's what I have. Magnaflow cats and resonator and stock mufflers. No drone and no rice. I little louder than stock. I love it. :D

kenewagner
07-29-2007, 02:19 PM
Ken,

Thanks for the input, Your exhaust tips look GREAT, I would be very happy with that look. Definately the cleanest job I've seen. I like that square look. I'm wondering, did you put them on after you had a noise problem, or did you put them on right away for the look? If so, did you notice a difference in cabin noise? By chance, do you have any pictures of under the muffler, where the tips connect to the muffler?
You mentioned you have 2-1/2 stock mufflers, did you get them from Ford? You are right about the stock mufflers that came on the car, they are 2". How long are your mufflers?

Jim

I did have dual round stainless steel tips that I made but hated the look. I did not get rid of the drone by puttin the tips pointing straight back. It wasnt untill I put the the 21/2" generic mufflers on that it went away entirely. I felt that if I couldnt enjoy the inside of the car while driving, big HP wouldnt mean a thing. I just bought mufflers from carquest that were approximately the same length as stock. I dont beleive I give much up on performace. From what I was led to beleive the further a restriction is down stream from the engine the less the restriction affects HP. Example the stock cast manifolds, if not ported will restrict more than stock mufflers at the rear of the exhaust system. Regardless if anyone else agrees with that. I would sacrifice a few ponys for a quite exhaust note in the cabin. Besides I would rather hear the wine of the blower over a ratty sounding exhaust note anyday. I dont have any pictures of the underside of the exhaust except my down tubes that I built. And thats another story

Ken

SuperDad
07-29-2007, 02:38 PM
I did have dual round stainless steel tips that I made but hated the look. I did not get rid of the drone by puttin the tips pointing straight back. It wasnt untill I put the the 21/2" generic mufflers on that it went away entirely. I felt that if I couldnt enjoy the inside of the car while driving, big HP wouldnt mean a thing. I just bought mufflers from carquest that were approximately the same length as stock. I dont beleive I give much up on performace. From what I was led to beleive the further a restriction is down stream from the engine the less the restriction affects HP. Example the stock cast manifolds, if not ported will restrict more than stock mufflers at the rear of the exhaust system. Regardless if anyone else agrees with that. I would sacrifice a few ponys for a quite exhaust note in the cabin. Besides I would rather hear the wine of the blower over a ratty sounding exhaust note anyday. I dont have any pictures of the underside of the exhaust except my down tubes that I built. And thats another story

Ken

Perfect, you just made my decision for me. I'm going to get some more restrictive (stock type) mufflers and put them on. Leads me to another question, Do I need tips on the back if I go with this style muffler? What kind of muffler should I look for? Are you talaking about turbo style mufflers? How did you fabricate your tips? What material did you start with?

kenewagner
07-29-2007, 03:29 PM
Perfect, you just made my decision for me. I'm going to get some more restrictive (stock type) mufflers and put them on. Leads me to another question, Do I need tips on the back if I go with this style muffler? What kind of muffler should I look for? Are you talaking about turbo style mufflers? How did you fabricate your tips? What material did you start with?

I would not think you need the tips if you go with a stock type muffler. The original exhaust has no drone or tips. I installed a set of turbo type mufflers they were terrible in my experence. I went to the bigger 21/2" stock type muffler as I thought that size does make a diffrence and would negate the slightly more restrictive design. I used mandrel bend elbows, cut and shaped them to tips I made from 10 GA mild steel and formed in a hydralic bender. I have had over 35 years as a fabricator welder as well as a fully equipped shop to tinker in, so I am a little ahead of the average guy on the street. I am amazed at the great work some of the guys turn out in this club with little equipment and experence. One thing though, cutting through the lower valance under the bumper to run tips through is a hit and miss thing. It is easy to cut the material and very hard to make it look right. You will see what I mean if you decide to go that way

Ken

SuperDad
07-29-2007, 07:31 PM
Ken, very helpful. By the way I just bought a flexible 2.5" exhaust pipe repair kit at Auto Zone with 2 clamps. I mocked a couple of tips sticking out 2to 3 inches past my bumper. It really doesn't look that bad, (for what it is). I would never leave it that way, but it gives me a good idea what it would look like with some perminent chrome tips. Getting sidetracked a little bit there, but the sound improvement was definately better. I would say about 50%. If the system sounded this way from the git-go, I may have lived with it, but after hearing the louder, current version, I definately want it quieter. So I will stick to the plan, get some 2.5" stock mufflers (no turbo) & just use the down pipes (no cutting of my bumper). I think that will be the safest bet going!:)
Thanks again, Ken, its nice to get feedback from someone who has had the exact same problem, makes life much easier.

Jim

Dirk SC
07-29-2007, 08:20 PM
Strange, i had a very similar setup to what you had. Ported manifolds, Dual 2.5 into a dual in dual out magnflow res, dual borla pro xs out the back with magnaflow tips. I do have the longer ones though. My car sounds good to me. Not ricey at all. I will see if I can get a sound clip to post.

Jmat95
12-04-2007, 02:18 PM
Super Dad
What did you end up doing with your exhaust system and did it work? I have a 95 SC and 2.5x3x2.5 with dynomax super turbo mufflers instead of the Borlas and I am having the same problem you did. Outside it sounds great inside it will drive you mad, a little acceleration and you can not hear the radio. I did extend the tail pipe a little and it helped but my mufflers are so close to the bumper I can not make a sharp S turn like would be require to shoot it straight out the back. Like you I do not want to cut the bumper, that is not an option.
If you when to stock type, what did you get (Model and PN) because 2 is not stock?

By the way with ported manifolds did the engine seem to run hotter?

jonroe
12-04-2007, 03:49 PM
The stock mufflers are not all that bad and they will sound much better. That's the cheap way out. The other option is to get some turbo style mufflers. Borla's typically do not sound good on our cars unless you manage to stuff the really long ones under there.

I'm sorry folks but I disagree. I put on the Borla cat-back system in 2002 which included the Borla resonator plus small mufflers. It is anything but ricey. It is the most growl you are going to get out of a V6.

95_XR7
12-04-2007, 10:52 PM
I have Borla Pro XS mufflers, and my problem is the resonator. Every car I have heard with a Magnaflow resonator has drone to it. Maybe it's just me?

Anyways, I hear compliments on the sound, for it being a V6.

frdlvr30
12-04-2007, 11:22 PM
I'm sorry folks but I disagree. I put on the Borla cat-back system in 2002 which included the Borla resonator plus small mufflers. It is anything but ricey. It is the most growl you are going to get out of a V6.

I have the same set up on my car except, catless downtubes. Its pretty ricey between 2000 and 3000rpm. Other than that it sounds good. Problem is, its always btween 2-3000rpm when im driving....Pretty loud inside the car and out i think.

johnrada
12-04-2007, 11:44 PM
I got mid length headers, high flow cats, magnaflow resonator and straight pipes out the back, its a little on the loud side when taking off with it, but i don't notice a drone in the cock pit enough to complain about it, and it still sounds like a V6 which i really do appreciate

David Neibert
12-05-2007, 12:12 AM
You guys are starting to make me worry about how my new exhaust is going to sound.

David

95_XR7
12-05-2007, 12:27 AM
You guys are starting to make me worry about how my new exhaust is going to sound.

David

Rofl Dave. If you don't mind me asking, what are you planning on going with? I remember seeing you mention it, but can't seem to find it.

slipknot1212121
12-05-2007, 01:44 AM
Just thought I would add my 2 cents. first thing i did was add only a magnaflow res. to the stock system, with stock pipes and muffs, sounded the same but you could kinda hear the individual piston fires more.... then ditched that and had my bro weld up a 2.5 mandrel exhaust , stock downtubes and cats to the mag. res. then 2.5 out and split in back to dual 2.5 , no muffs only small oval tips, I think it sounds great with no drone but kinda loud at take off... right now from doin a 5spd swap i just have the resonator then dumped pointed to the ground.. I love the way it sounds cruising but really really loud drone in the car(I know cause its dumped) I have never heard a SC with magnaflow res. and muffs, or any aftermarket muffs for that matter, but i didnt think mine sounded ricey with only a resonator, my guess is the borla's,hack the muffs off and see how it sounds, if you still dont like it, I would get reallly big muffs and run the diagnal(like the late 90's caddy's)if your trying to get it to sound like a big v8, 5.0.camaro.. it wont happen. Ill shut up now;)

jonroe
12-05-2007, 07:43 AM
I have the same set up on my car except, catless downtubes. Its pretty ricey between 2000 and 3000rpm. Other than that it sounds good. Problem is, its always btween 2-3000rpm when im driving....Pretty loud inside the car and out i think.

I still have cats (after market and farther downstream). I agree that it can be loud under acceleration in the car but not ricey, at least what I think is ricey. It's a low loud growl. I have whatever mufflers came with the Borla cat-back but I think they are not the Pro XS mufflers. Just recently I replaced my stock mufflers on my Mercury Marauder with Borla Turbos and like it just fine.

thunderkid84
12-05-2007, 10:43 AM
heres how mine sounds. ported stock manifolds, 2.25 catless downtubes, mag. resonator, 2.5 around tank, and then dual 2.25 straight pipes. (you can stop the video when i take the cam in the car, i just sit there with the camera running lol).

http://s134.photobucket.com/albums/q104/thunderkid84/?action=view&current=SA400069.flv

u can also hear a bit of blower whine in the background. sounds good with the FMIC in !

im thinkin of goin with glasspacks and then maybe the borla pro xs's

David Neibert
12-05-2007, 12:47 PM
Rofl Dave. If you don't mind me asking, what are you planning on going with? I remember seeing you mention it, but can't seem to find it.

Kooks longtube headers w/3" collectors, 3" pipes off the collectors (no cats) to a dual 3" to single 3.5" Y, then a 3.5" in/out magnaflow resonator/muffler (polished stainless) a V-band connection at the rear of the resonator/muffler, then a single 3.5" pipe back to the diff area, then another 3.5" to 3" Y, then dual 3" pipes to magnaflow 3" open chamber mufflers (polished stainless). Mufflers will be tipped with slash cut chrome extensions (like I had). All pipes will be mandrel bent stainless and tig welded.

I also switched to the later style fuel tank for a larger straighter exhaust path. While the tank was out I switched from the stock drive shaft to an aluminum one that is considerable stronger, lighter and better balanced.

Installation of the longtube headers required extending the o2 sensor leads, removal of my turnbuckle style torque strap, and redrilling/tapping the transmission pan to relocate the trans temp gauge sender to the rear of the pan instead of the side. Should be done within the next few days. I'll post some pictures and let you guys know how it sounds shortly afterward.

I'm also planning to go back to my usual dyno shop and make a couple pulls to see if it makes more power and to see if the larger exhaust had any impact on the boost levels. I'm not expecting more than 10 rwhp over my previous exhaust system, but who knows.....it might surprise me and make more.

David

Ira R.
12-05-2007, 03:35 PM
Dave, why not try it without the resonator and use the 3.5" straight pipe??

Ira

David Neibert
12-05-2007, 05:24 PM
Dave, why not try it without the resonator and use the 3.5" straight pipe??

Ira

Ira,

Since the mufflers I'm using are the type you can see straight thru and I'm not using any cats, decided to add the resonator because I thought it would be too loud.

David

Ira R.
12-05-2007, 05:39 PM
Ira,

Since the mufflers I'm using are the type you can see straight thru and I'm not using any cats, decided to add the resonator because I thought it would be too loud.

David
Well, yea, I guess it would be a little louder then usual. Damn exhaust requires as much trial and error as anything else on the car and it's such a PIA to do. And everyone has a slightly different ear when it comes to what they like.

Ira

95_XR7
12-05-2007, 05:47 PM
Ira,

Since the mufflers I'm using are the type you can see straight thru and I'm not using any cats, decided to add the resonator because I thought it would be too loud.

David

Dave, how long is the resonator you're using? If you're worried about it being crappy sounding, use the longest resonator and mufflers you can.

David Neibert
12-05-2007, 06:18 PM
Dave, how long is the resonator you're using? If you're worried about it being crappy sounding, use the longest resonator and mufflers you can.

Not really a big selection in the 3" and 3.5" polished stainless stuff, I think the mufflers/resonator are all 14" long.

David

95_XR7
12-05-2007, 06:48 PM
Not really a big selection in the 3" and 3.5" polished stainless stuff, I think the mufflers/resonator are all 14" long.

David

Good point, didn't think of that. You could always get in polished afterwards.
What you could also consider, is in stead of using one 3.5' resonator, how about looking on Summit or some other sites and take a look at the tube mufflers/resonators. I remember seeing some that are 20+ inches long. You could get two in 3' and then after them, you could go to a single 3.5 through the gas tank area.

David Neibert
12-06-2007, 01:17 AM
Good point, didn't think of that. You could always get in polished afterwards.
What you could also consider, is in stead of using one 3.5' resonator, how about looking on Summit or some other sites and take a look at the tube mufflers/resonators. I remember seeing some that are 20+ inches long. You could get two in 3' and then after them, you could go to a single 3.5 through the gas tank area.

I already decided what I was doing several weeks ago and it's pretty much all installed and welded up. Only thing lacking is fabrication of the rear 3" pipes, mounting the two rear mufflers and making some exhaust tips. So far the lowest hanging point of the entire exhaust system is the collectors on the long tube headers.

David

Tickler
12-06-2007, 02:31 AM
Dont cut your rear valance, thats like buying a nice suit and then ripping the sleeves off.

95_XR7
12-06-2007, 09:23 AM
I already decided what I was doing several weeks ago and it's pretty much all installed and welded up. Only thing lacking is fabrication of the rear 3" pipes, mounting the two rear mufflers and making some exhaust tips. So far the lowest hanging point of the entire exhaust system is the collectors on the long tube headers.

David

Ahh, sorry about that. I didn't think you had it all welded up already. To be honest I don't think it'll sound too bad, but then again, I've never seen a V6 with that big of exhaust. I guess we can hope for the best?

David Neibert
12-06-2007, 09:58 AM
Ahh, sorry about that. I didn't think you had it all welded up already. To be honest I don't think it'll sound too bad, but then again, I've never seen a V6 with that big of exhaust. I guess we can hope for the best?

Once I decide what I'm going to do to this car, I don't usually wait very long before doing it.

After taking a close look at the old exhaust, it was actually much more restrictive than I first thought, especially the hard 90 degree turn in the 3" pipe going around the fuel tank and the area back near the mufflers. I thought it had mandrel bends on those pipes, but they were all crush bent except for the 3" section. The new exhaust will flow much better, but it remains to be seen if that translates to more power.

I'm more concerned about how it sounds than how much power it makes.

David

Want2LearnTBIRD
12-06-2007, 12:15 PM
if your really concerned about the sound, jus stick in 4 12" subs in the trunk, 2 amps few new speakers and turn it up. Now all u hear is beautiful music and no annoying exhaust :D

S_Mazza
12-06-2007, 12:42 PM
Well, to expand upon that idea, put a computer in the trunk too. Record some sound clips of a Mustang GT at various load points, run signal wires from the MAF and TPS to the computer, and blast the appropriate exhaust sound for each load point. You don't even have to get under the car to get the sound you want!

Want2LearnTBIRD
12-06-2007, 02:02 PM
and two blow horns where your exhaust tips would be

Mike8675309
12-06-2007, 08:42 PM
Dont cut your rear valance, thats like buying a nice suit and then ripping the sleeves off.

bah... I'm doing it. just one more item in the long line of changes that the car is gonna need.

As far as if you are trying to tune the sound, get with Mercutio, and line up an exhaust shop to do a test of a bunch of mufflers. then contact a bunch of them and get samples. Then start trying them out until you find the one you like. Make an article out of it.

sail7seas
12-06-2007, 09:43 PM
I just had a complete exhaust manifold back system installed. 2.5 from the manifolds, to magnaflow high flow cats into a magnaflow resinator, 3 inch out, split into 2.5 to Borla PRO XS Mufflers.
It sounds soooo ricey. Mostly inside the car. I'm not sure if it's a drone inside, but it's very loud, (annoying). I thought putting in the resonator eliminates the drone (from what I've read on this site). My muffler shop guy said, if we remove the resonator, that might eliminate the drone inside. What do you guys think.:(

someone once told me it is the 3" tube back resonator to mufflers that causes the drone.
like blowing threw a toliet paper core like a trumpet.
So any votes for true dual to remove DRONE?

90blkbrd
12-07-2007, 07:18 PM
someone once told me it is the 3" tube back resonator to mufflers that causes the drone.
like blowing threw a toliet paper core like a trumpet.
So any votes for true dual to remove DRONE?

True duals doesn't eliminate the drone. I know of a car with 2 1/4 or 2 1/2 from front to back and it has a nasty drone. He even has a fuel cell in the trunk to keep the exhaust strait.

I got rid of most of my drone by changing where the tips exit the rear. I've shortened them but haven't got a chance to see the difference. (I have a tread on exhaust as well)

sail7seas
12-08-2007, 09:11 PM
True duals doesn't eliminate the drone. I know of a car with 2 1/4 or 2 1/2 from front to back and it has a nasty drone. He even has a fuel cell in the trunk to keep the exhaust strait.

I got rid of most of my drone by changing where the tips exit the rear. I've shortened them but haven't got a chance to see the difference. (I have a tread on exhaust as well)

Just checking to see if we are talking about the same drone?
The drone I had was only from 2000 to 3000 rpms, and was so bad I could NOT hear the radio.
(with Dynomax superturbo mufflers from SCP)

Below 2000, or above 3000 the car was almost as quiet as stock.
Changing to 19" Borla mufflers eliminated the 2000-3000 rpm issue.

90blkbrd
12-08-2007, 11:39 PM
The car with duals, no it is not the same drone.