Go Back   MustangForums.com > Ford Mustang Tech > 5.0L (1979-1995) Mustang > 5.0L General Discussion
Sign in using an external account
Register Forgot Password?
Search


5.0L General Discussion This section is for non-tech specific information pertaining to 5.0L Mustangs.

Welcome to Mustang Forums!
Welcome to Mustang Forums.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!


Muffler Question

Reply
 
 
 
 
Thread Tools Search this Thread
Old 04-24-2013, 01:48 PM   #1
Duncan_GT
4th Gear Member
 
Duncan_GT's Avatar
 
Join Date: Jun 2011
Vehicle: 95 GT
Location: Indy
Posts: 1,353
Default Muffler Question

I posted this in the Pipes section but didn't get any responses.

Any of you guys know if you can take the diameter of a muffler and open it up? Like go from a 2.5" to a 3" inlet/outlet? I've searched google a couple hours but haven't had much luck. I'm upgrading to 3" exhaust but really don't want to buy new mufflers, especially when I got these less than 2 years ago.
This ad is not displayed to registered or logged-in members.
Register your free account today and become a member on Mustang Forums!
__________________
1995 Mustang GT
1999 F150 Lariat 4x4

Soon to come: 393 stroker
351w bored .030, Probe Industries forged internals, Trickflow 205's, FTI custom cam, Trickflow R 90mm intake, Accufab 90mm TB, FRPP 42lb injectors, 1 3/4" custom Accufab LT's, 3" exhaust, MS2
Duncan_GT is offline   Reply With Quote
Old 04-24-2013, 02:11 PM   #2
dawson1112
5th Gear Member
 
Join Date: Jul 2012
Vehicle: 1990 lx hatch 5.0
Location: ohio
Posts: 2,817
Default

The only way I know is to get the 2.5" to 3" adaptors . I mean if you took the time to cut out the 2.5" inlet/outlet tubes cut new holes in the ends and weld in new tubes maybe but not worth it in my book . And you would likely mess up the tune of the muffler.....
__________________
dawson1112 is offline   Reply With Quote
Old 04-24-2013, 05:09 PM   #3
Maxwelhse
4th Gear Member
 
Join Date: Jan 2007
Location:
Posts: 1,102
Default

What dawson said... Plus I can't imagine what motor you've got in mind that needs 3" full length dual exhaust...
__________________
'91 GT 5 Speed
Maxwelhse is offline   Reply With Quote
Old 04-24-2013, 06:01 PM   #4
mjr46
Pro-comp heads rule!
 
mjr46's Avatar
 
Join Date: Jun 2007
Vehicle: 85 mustang
Location: West Virginia
Posts: 30,245
Default

cut them flush with the case then use a grinder to open the hole up and weld in a 3 inch piece of pipe
__________________

Quote:
Originally Posted by dudegirl View Post
Be polite and cordial when you talk to them, as pissing off the guys that can help you is seldom a good idea.
mjr46 is offline   Reply With Quote
Old 04-24-2013, 06:05 PM   #5
DocSnickers
3rd Gear Member
 
DocSnickers's Avatar
 
Join Date: Nov 2012
Vehicle: 2013 GTHG Ford Mustang
Location: WA
Posts: 863
Default

I have seen cases where mufflers being to big cause a lose of horse power because its to much flow.
DocSnickers is offline   Reply With Quote
Old 04-24-2013, 06:30 PM   #6
mjr46
Pro-comp heads rule!
 
mjr46's Avatar
 
Join Date: Jun 2007
Vehicle: 85 mustang
Location: West Virginia
Posts: 30,245
Default

Quote:
Originally Posted by DocSnickers View Post
I have seen cases where mufflers being to big cause a lose of horse power because its to much flow.
he'll be just fine with 3 inch, he has a 351 stroker not a 4 popper.
__________________

Quote:
Originally Posted by dudegirl View Post
Be polite and cordial when you talk to them, as pissing off the guys that can help you is seldom a good idea.
mjr46 is offline   Reply With Quote
Old 04-24-2013, 07:07 PM   #7
Duncan_GT
4th Gear Member
 
Duncan_GT's Avatar
 
Join Date: Jun 2011
Vehicle: 95 GT
Location: Indy
Posts: 1,353
Default

Quote:
Originally Posted by Maxwelhse View Post
What dawson said... Plus I can't imagine what motor you've got in mind that needs 3" full length dual exhaust...
See sig.
__________________
1995 Mustang GT
1999 F150 Lariat 4x4

Soon to come: 393 stroker
351w bored .030, Probe Industries forged internals, Trickflow 205's, FTI custom cam, Trickflow R 90mm intake, Accufab 90mm TB, FRPP 42lb injectors, 1 3/4" custom Accufab LT's, 3" exhaust, MS2
Duncan_GT is offline   Reply With Quote
Old 04-24-2013, 07:12 PM   #8
Duncan_GT
4th Gear Member
 
Duncan_GT's Avatar
 
Join Date: Jun 2011
Vehicle: 95 GT
Location: Indy
Posts: 1,353
Default

Quote:
Originally Posted by mjr46 View Post
cut them flush with the case then use a grinder to open the hole up and weld in a 3 inch piece of pipe
Thats what I had planned on, I just didnt know if the internals of the muffler was built differently.

Anybody used one of the exhaust cut out kits?
__________________
1995 Mustang GT
1999 F150 Lariat 4x4

Soon to come: 393 stroker
351w bored .030, Probe Industries forged internals, Trickflow 205's, FTI custom cam, Trickflow R 90mm intake, Accufab 90mm TB, FRPP 42lb injectors, 1 3/4" custom Accufab LT's, 3" exhaust, MS2
Duncan_GT is offline   Reply With Quote
Old 04-24-2013, 07:13 PM   #9
Maxwelhse
4th Gear Member
 
Join Date: Jan 2007
Location:
Posts: 1,102
Default

My question isn't so much about whether or not it will hurt performance (though I think the argument has some merit), but more about if it's worth the trouble on anything short of a NASCAR motor.

I do remember reading some stuff about how exhaust gases contract as they cool in the pipe, thus loosing velocity, so in some applications you're better off to reduce your pipe sizes down in stages the further you get away from the headers. The intent being to maintain that velocity and increase scavenging. Again... This was geared toward race car type of stuff.

If nothing else, on a street car, I wouldn't go through the hassle of fitting up 3" TAIL PIPES. Turn it down in front of the axle or go with the regular old 2.5" tails.
__________________
'91 GT 5 Speed
Maxwelhse is offline   Reply With Quote
Old 04-24-2013, 08:22 PM   #10
Duncan_GT
4th Gear Member
 
Duncan_GT's Avatar
 
Join Date: Jun 2011
Vehicle: 95 GT
Location: Indy
Posts: 1,353
Default

Ive known a couple guys to run 347's with 3". Depends on the application
__________________
1995 Mustang GT
1999 F150 Lariat 4x4

Soon to come: 393 stroker
351w bored .030, Probe Industries forged internals, Trickflow 205's, FTI custom cam, Trickflow R 90mm intake, Accufab 90mm TB, FRPP 42lb injectors, 1 3/4" custom Accufab LT's, 3" exhaust, MS2
Duncan_GT is offline   Reply With Quote
Old 04-24-2013, 09:19 PM   #11
reldla1996
2nd Gear Member
 
Join Date: Sep 2011
Vehicle: 89 Mustang
Location: Ohio
Posts: 325
Default

I've run 3" in mine, all the way out the back, and had it on my 306 for a year before I bored and stroked the engine (getting ready for it!). Honestly when I went from 2.5" to 3" on the 306, I didn't notice any difference, up or down in power/torque, but the noise level did go up. The 3" tail pipes are tight....
__________________
89 Coupe, 369 big bore, AFR, custom Comp cam, Kooks, 3" exhaust, 11.6 @ 121 mph
04 Cobra, JLT 12" CAI, Magnaflow, Borla, Stifflers, FTBR Rr Susp, MM Frt Susp, 12.4 @ 115 mph
67 Cougar, XR7 GT, 462 FE, 4 spd, Edelbrock heads, PI intake, Global West
reldla1996 is offline   Reply With Quote
Old 04-24-2013, 11:12 PM   #12
Duncan_GT
4th Gear Member
 
Duncan_GT's Avatar
 
Join Date: Jun 2011
Vehicle: 95 GT
Location: Indy
Posts: 1,353
Default

Haha thats sick. I hope the tails dont look out of place being 3"
__________________
1995 Mustang GT
1999 F150 Lariat 4x4

Soon to come: 393 stroker
351w bored .030, Probe Industries forged internals, Trickflow 205's, FTI custom cam, Trickflow R 90mm intake, Accufab 90mm TB, FRPP 42lb injectors, 1 3/4" custom Accufab LT's, 3" exhaust, MS2
Duncan_GT is offline   Reply With Quote
Old 04-25-2013, 05:18 AM   #13
dawson1112
5th Gear Member
 
Join Date: Jul 2012
Vehicle: 1990 lx hatch 5.0
Location: ohio
Posts: 2,817
Default

Haha 3" on that stroker will sound like you have a monster under the hood. I cant wait till you get it goin and put a video up. Im pulling for ya.

I had a 3/4 ton gmc with a cammed out 350 edelbrock performer heads / intake with a 800 cfm 4bbl carb 3" full exhaust . I pulled some big *** trees out of the woods with it with minimal effort. The sound was amazing , and when I idled through a parking lot car alarms would sound off ....
__________________
dawson1112 is offline   Reply With Quote
Old 04-25-2013, 08:53 AM   #14
Duncan_GT
4th Gear Member
 
Duncan_GT's Avatar
 
Join Date: Jun 2011
Vehicle: 95 GT
Location: Indy
Posts: 1,353
Default

The parking garage at school is going to hate me lol. I start putting it back together this weekend and then I'll pick it back up when finals are over. I hope its a monster haha
__________________
1995 Mustang GT
1999 F150 Lariat 4x4

Soon to come: 393 stroker
351w bored .030, Probe Industries forged internals, Trickflow 205's, FTI custom cam, Trickflow R 90mm intake, Accufab 90mm TB, FRPP 42lb injectors, 1 3/4" custom Accufab LT's, 3" exhaust, MS2
Duncan_GT is offline   Reply With Quote
Old 04-25-2013, 09:26 AM   #15
dawson1112
5th Gear Member
 
Join Date: Jul 2012
Vehicle: 1990 lx hatch 5.0
Location: ohio
Posts: 2,817
Default

Im sure it will be a monster of an engine in that sn95 platform, Youll be making big torque numbers at low rpm.
__________________
dawson1112 is offline   Reply With Quote
Old 04-25-2013, 09:43 AM   #16
mjr46
Pro-comp heads rule!
 
mjr46's Avatar
 
Join Date: Jun 2007
Vehicle: 85 mustang
Location: West Virginia
Posts: 30,245
Default

Quote:
Originally Posted by Maxwelhse View Post
My question isn't so much about whether or not it will hurt performance (though I think the argument has some merit), but more about if it's worth the trouble on anything short of a NASCAR motor.

I do remember reading some stuff about how exhaust gases contract as they cool in the pipe, thus loosing velocity, so in some applications you're better off to reduce your pipe sizes down in stages the further you get away from the headers. The intent being to maintain that velocity and increase scavenging. Again... This was geared toward race car type of stuff.

If nothing else, on a street car, I wouldn't go through the hassle of fitting up 3" TAIL PIPES. Turn it down in front of the axle or go with the regular old 2.5" tails.
oh dear , where to start with all this........nascar motor only needs 3 inch? nevermind, stay slow
__________________

Quote:
Originally Posted by dudegirl View Post
Be polite and cordial when you talk to them, as pissing off the guys that can help you is seldom a good idea.
mjr46 is offline   Reply With Quote
Old 04-26-2013, 03:13 PM   #17
uedlose
5th Gear Member
 
uedlose's Avatar
 
Join Date: Jun 2004
Vehicle: 89 mustang
Location: Charles Town WV
Posts: 2,238
Default

I have been running 3in dumps for years now I am moving up to a 3.5 down pipe into a 3in x just cuz I want duals dumps LOL but I may just move over to a single 3.5 pipe so it sounds like a UPS truck. LOL no really just so it is easier to work with just not sure where I am gone to put it under the car. it is freaking huge. The 3.5 down pipe did come by the stock steering shaft more room over there then I thought.
Scavenging we don't want any of that **** I would just dump it under the hood if it would not make so much heat LOL. I run the Morose spiral flow right now but I need to do a back pressure check again if it is to high with the new down pipe. If it is I guess I am gone with a race bullet muffles our car is quiet now due to the turbo hushing things down even with the 3in. which I like much better then all the noise and drone. Getting old here. But the big plus is the sleeper effect it has it cant be fast it is not loud. till they hear it spool then they know they been had LOLLOLLOL..Love it
__________________
Just another turbocharged Street Mustang, yes its fast. when it runs. But never fast enough
Few things for salehttps://docs.google.com/document/d/1.../edit?hl=en_US Most parts are OBO
uedlose is offline   Reply With Quote
Old 04-26-2013, 03:49 PM   #18
bluebeastsrt
6th Gear Member
 
bluebeastsrt's Avatar
 
Join Date: Jun 2006
Vehicle: 1995 mustang GT
Location: Jersey
Posts: 10,734
ItsUrFuneral
Default

I do alot of drag racing and notice alot of open header cars at the track. Imagine how much faster they'd be if they installed a 2.5 exhaust.
__________________
ENGINE363 forged dart engine. 300 shot!TRANNY C4 with trans brake, 3800 stall, 9in. raceconverter, hurst shifter REAR Moser 35 spline kit with spool, FRPP 3.73 gearsSUSPENION UPR Upper & lower control arms, Strange 10 way dampers, coilovers up front, BBK sub frame connectors, UPR Tube K-member & A-arms NEW Mustang TIMES COMING.
2011 Camaro SS 12.34@110.92
bluebeastsrt is offline   Reply With Quote
Old 04-26-2013, 05:51 PM   #19
Duncan_GT
4th Gear Member
 
Duncan_GT's Avatar
 
Join Date: Jun 2011
Vehicle: 95 GT
Location: Indy
Posts: 1,353
Default

Quote:
Originally Posted by uedlose View Post
I may just move over to a single 3.5 pipe so it sounds like a UPS truck.
I lol'd at this.
__________________
1995 Mustang GT
1999 F150 Lariat 4x4

Soon to come: 393 stroker
351w bored .030, Probe Industries forged internals, Trickflow 205's, FTI custom cam, Trickflow R 90mm intake, Accufab 90mm TB, FRPP 42lb injectors, 1 3/4" custom Accufab LT's, 3" exhaust, MS2
Duncan_GT is offline   Reply With Quote
Old 04-26-2013, 05:51 PM
MustangForums
Ford Mustang




Paid Advertisement

 
 
 
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Advertising

Featured Sponsors
Vendor Directory
New Sponsors
All times are GMT -5. The time now is 12:43 AM.

© Internet Brands, Inc.


This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company
Emails Backup