U.S. CitiesCity-Data Forum Index
Covid-19 Information Page
Go Back   City-Data Forum > General Forums > Automotive > Brand-specific forums > Ford and Lincoln
 [Register]
Please register to participate in our discussions with 2 million other members - it's free and quick! Some forums can only be seen by registered members. After you create your account, you'll be able to customize options and access all our 15,000 new posts/day with fewer ads.
View detailed profile (Advanced) or search
site with Google Custom Search

Search Forums  (Advanced)
Reply Start New Thread
 
Old 09-28-2011, 07:08 PM
 
8,402 posts, read 21,320,916 times
Reputation: 6790

Advertisements

...to replace the droning Flowmaster. Most likely I'll go with a Magnaflow. The current one is 13" long, and I have enough room to go up to 17" long. Is there any advantage to a larger muffler?
Rate this post positively Reply With Quote Quick reply to this message

 
Old 09-28-2011, 07:13 PM
 
Location: Eastern Washington
15,119 posts, read 47,845,764 times
Reputation: 14367
All other things being equal, which they ain't, a bigger muffler would do a better job of flowing exhaust and reducing sound.

Unless you can find a similar truck with the muffler you are considering, and listen to it, it's hard to say if any specific muffler you are looking at will do what you want to do.
Rate this post positively Reply With Quote Quick reply to this message
 
Old 09-28-2011, 07:29 PM
 
8,402 posts, read 21,320,916 times
Reputation: 6790
Quote:
Originally Posted by M3 Mitch View Post
All other things being equal, which they ain't, a bigger muffler would do a better job of flowing exhaust and reducing sound.

Unless you can find a similar truck with the muffler you are considering, and listen to it, it's hard to say if any specific muffler you are looking at will do what you want to do.
I have listened to the same truck with a Magnaflow, and know it will not drone. My question is will there be any performance gain or loss with a bigger muffler.
Rate this post positively Reply With Quote Quick reply to this message
 
Old 09-28-2011, 07:33 PM
 
Location: Eastern Washington
15,119 posts, read 47,845,764 times
Reputation: 14367
Just guessing, I would be surprised if it causes a performance loss. Although, keep in mind that the "butt dyno" lies and does not tell the truth. Mods that make a car louder, and maybe make it bog just a bit when you floor the gas (oversized carburator, mechanical secondary 4-bbl, etc.) will be rated postively by the butt-dyno, but in fact make the car or truck perform worse.

If your cruise MPG stays the same or gets better, from a performance standpoint you at least broke even.

Final thought - if the droning is driving you nuts, if you have to give up 3-5 HP to get rid of it, maybe it's an OK trade (I must be getting old to have wrote that...).
Rate this post positively Reply With Quote Quick reply to this message
 
Old 09-28-2011, 07:43 PM
 
33,386 posts, read 28,934,398 times
Reputation: 19867
in general, larger mufflers are quieter, and in the old days tended to reduce flow. these days however, mufflers are well thought out and run across many flow benches before they are put on the market. i doubt that you will fell any loss of performance or fuel economy by going to a larger aftermarket muffler.
Rate this post positively Reply With Quote Quick reply to this message
 
Old 09-28-2011, 08:23 PM
 
8,402 posts, read 21,320,916 times
Reputation: 6790
Quote:
Originally Posted by M3 Mitch View Post
Just guessing, I would be surprised if it causes a performance loss. Although, keep in mind that the "butt dyno" lies and does not tell the truth. Mods that make a car louder, and maybe make it bog just a bit when you floor the gas (oversized carburator, mechanical secondary 4-bbl, etc.) will be rated postively by the butt-dyno, but in fact make the car or truck perform worse.

If your cruise MPG stays the same or gets better, from a performance standpoint you at least broke even.

Final thought - if the droning is driving you nuts, if you have to give up 3-5 HP to get rid of it, maybe it's an OK trade (I must be getting old to have wrote that...).
The drone has bugged me for years, but most of my truck driving miles are on town for less than 20 miles, so it was bearable. Now I'm driving the truck a lot more, and for much longer distances. On the highway the drone is terrible. So it's gotta go. Added MPG would be welcomed.

Quote:
Originally Posted by rbohm View Post
in general, larger mufflers are quieter, and in the old days tended to reduce flow. these days however, mufflers are well thought out and run across many flow benches before they are put on the market. i doubt that you will fell any loss of performance or fuel economy by going to a larger aftermarket muffler.
Sounds like there's not really a downside to going larger, and may be an upside. I guess I'll go big.
Rate this post positively Reply With Quote Quick reply to this message
 
Old 09-28-2011, 08:55 PM
 
Location: Earth
4,235 posts, read 22,086,791 times
Reputation: 2233
Thought I'd throw this out there...but have you tried adding a resonator to the end of the tail pipe?

I had a truck with a Flowmaster that droned, and one day a freind gave me a glasspack muffler...shoved it in the tail pipe one day wondering "wonder what this would sound like?" Low and behold the drone was gone.

Also what size tail pipe does your truck have?
Rate this post positively Reply With Quote Quick reply to this message
 
Old 09-28-2011, 09:49 PM
 
8,402 posts, read 21,320,916 times
Reputation: 6790
Quote:
Originally Posted by Deez Nuttz View Post
Thought I'd throw this out there...but have you tried adding a resonator to the end of the tail pipe?

I had a truck with a Flowmaster that droned, and one day a freind gave me a glasspack muffler...shoved it in the tail pipe one day wondering "wonder what this would sound like?" Low and behold the drone was gone.

Also what size tail pipe does your truck have?
Two pipes off of one muffler, couldn't tell you what size (one behind each rear wheel):




But I've never been happy with the Flowmaster sound, and I like the Magnaflow on most every vehicle I've heard.
Rate this post positively Reply With Quote Quick reply to this message
 
Old 09-29-2011, 04:12 AM
 
16,667 posts, read 16,309,289 times
Reputation: 10165
Quote:
Originally Posted by vmaxnc View Post
Two pipes off of one muffler, couldn't tell you what size (one behind each rear wheel):




But I've never been happy with the Flowmaster sound, and I like the Magnaflow on most every vehicle I've heard.
IMO Fords do sound better with the Magnaflow than with other aftermarket mufflers

That's what I had installed on my '02 F250 with the 5.4L after listening to Flowmaster and Gibson mufflers.
Rate this post positively Reply With Quote Quick reply to this message
 
Old 09-29-2011, 07:36 AM
 
19,023 posts, read 23,307,895 times
Reputation: 7334
It depends on what happens to back pressure. I suspect you may gain low end torque and loose top end horse power, in a un-usable powder band with the larger can. So depending on your demand for power or speed it might be a win win.
Rate this post positively Reply With Quote Quick reply to this message
Please register to post and access all features of our very popular forum. It is free and quick. Over $68,000 in prizes has already been given out to active posters on our forum. Additional giveaways are planned.

Detailed information about all U.S. cities, counties, and zip codes on our site: City-data.com.


Reply
Please update this thread with any new information or opinions. This open thread is still read by thousands of people, so we encourage all additional points of view.

Quick Reply
Message:


Over $104,000 in prizes was already given out to active posters on our forum and additional giveaways are planned!

Go Back   City-Data Forum > General Forums > Automotive > Brand-specific forums > Ford and Lincoln
Similar Threads
Follow City-Data.com founder on our Forum or

All times are GMT -6.

© 2005-2020, Advameg, Inc. · Please obey Forum Rules · Terms of Use and Privacy Policy · Bug Bounty

City-Data.com - Contact Us - Archive 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37 - Top