What is that sound a Magnaflow makes on decel??
Thread Starter
Joined: Dec 2003
Posts: 2,152
Likes: 0
From: Virginia Beach, Va
What is that sound a Magnaflow makes on decel?? just like it says, when u rev, what is the sound it makes afterwards when the rpms are droppin back down? heres a perfect example...heres a link to a guy on ls1sounds.com. listen to the last part of the video where u r staring at the back of the car and he is revving. in between revs on decel, what is that metallic, "tinny" sound it makes? ive heard it on several magnaflows and it sounds kinda bad. what causes this?
http://ls1sounds.com/magnaflow/magna..._JetHotORY.wmv
http://ls1sounds.com/magnaflow/magna..._JetHotORY.wmv
Thread Starter
Joined: Dec 2003
Posts: 2,152
Likes: 0
From: Virginia Beach, Va
i thought rasp was the blat blat blat machine gun sound u here when accelerating somewhere in the 2000-2500 rpm range. especially with an ory setup. this is on decel after u rev when the rpms are coming back down. any cure for this?? magnaflow does it the worst from what i hear. ive had magnaflow before and that was my biggest complaint.
hmm, my vette used to kinda do that but after I put the bullets on it quit. I have heard of people putting a resonator in the midpipe to stop that sound. Check out this video. Listen to the TA at the end. I think it makes the same sound..VIDEO
TECH Resident
Joined: Jul 2006
Posts: 828
Likes: 0
From: North Dallas
I don't know what it is either but it seems to be inherent to certain exaust set-ups, which is: headers, 3" catted-Y, and 3" cat-back.
My Corsa does it under certain conditions. A friend had the exact same setup as mine but on an A4 and did that a lot more. I've heard another car make the same sound as mine and it turns out he had the same kind of setup with a Borla C/B.
My Corsa does it under certain conditions. A friend had the exact same setup as mine but on an A4 and did that a lot more. I've heard another car make the same sound as mine and it turns out he had the same kind of setup with a Borla C/B.
Usually you do not hear about Magnaflow having any sort of tinny sound, because they are one of the best sounding catbacks out there. I think what you must be hearing is common with ypipe setups, they just don't sound as good as true duals. If have a clip of my old Magnaflow catback revving at home tonight I'll post the link.
Trending Topics
Tech Resident
Joined: Jan 2006
Posts: 5,117
Likes: 3
From: Philly
rasp comes in more than one flavor. what you're hearing is rasp, and magnaflow is full of it with an ORY. i know i'm in the minority on this one, but i think magnaflow sounds terrible and is extremely raspy. i can't stand that blatty, gurgly sound. the mangaflow has more rasp than my open cutout - a lot more.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Originally Posted by ChocoTaco369
rasp comes in more than one flavor. what you're hearing is rasp, and magnaflow is full of it with an ORY. i know i'm in the minority on this one, but i think magnaflow sounds terrible and is extremely raspy. i can't stand that blatty, gurgly sound. the mangaflow has more rasp than my open cutout - a lot more.
uh, no sir.
I've had both, you are comparing an open cutout to magnaflow? It just doesn't work like that.
It's entirely possible to have less rasp in a system without a muffler vs. one with a muffler as rasp is the offspring of the exhaust design. Thus, eliminating or changing certain aspects of it (whether it's adding things or removing things) can change it. That is certainly rasp in the video.
Thread Starter
Joined: Dec 2003
Posts: 2,152
Likes: 0
From: Virginia Beach, Va
So that sound on decel is rasp indeed. is this attirbuted to the y-pipe design as well as having no cats? ive heard catted cars with magnaflow that dont have that sound, so i know the cats have something to do with it, but does the y pipe design also contribute to the raspiness?
Thread Starter
Joined: Dec 2003
Posts: 2,152
Likes: 0
From: Virginia Beach, Va
im about to order a catback and its a toss up right now between the hooker and magnaflow. all said and done, i like the hooker sound better, but i like the stainless steel of the magnaflow. i dont like either tips tho, which kinda makes it hard to think about buying either full catback instead of just the muffler.
Thread Starter
Joined: Dec 2003
Posts: 2,152
Likes: 0
From: Virginia Beach, Va
and for whoever said the magnaflow has an old school sound....what in the world is old school about the magnaflow sound? its really gurgly instead of a muscle car growl.
Magnaflow with cat's sounds 100x better, just like the loudmouth with cats. It's all in the y-pipe design and whether you're running cats or not. I hated my LT/ORY/LM setup, but I put some small dynatech cats in the Y and now I love it. I wouldn't trade it for anything. It's all in the cats, my friend...
TECH Fanatic
Joined: Nov 2003
Posts: 1,241
Likes: 0
From: MD
It's all in the y-pipe merge and exhaust setup. I'll explain in the end.
As for the sound. No it is not rasp. It is the exhaust depressurizing. All free flowing exhausts do it but the sound is more pronounced through an ORY, especially without cats. As for it sounding like hell, maybe if it's not setup correctly. First, almost all off the shelf y-pipes blow chunks. Check out the merges, especially on the inside and you'll be quite suprised. Get a custom one. After having a custom y made and getting most of the exhaust welded up the tone of my exhaust (Magnaflow, Jet hots, no cats) completely changed. Will never sound like a true muscle car but sounds damn good with little rasp, no popping, or mechanical sounds.
The blaaaah sound when the revs are dropping smoothed out alot and sounds more throaty.
As for the sound. No it is not rasp. It is the exhaust depressurizing. All free flowing exhausts do it but the sound is more pronounced through an ORY, especially without cats. As for it sounding like hell, maybe if it's not setup correctly. First, almost all off the shelf y-pipes blow chunks. Check out the merges, especially on the inside and you'll be quite suprised. Get a custom one. After having a custom y made and getting most of the exhaust welded up the tone of my exhaust (Magnaflow, Jet hots, no cats) completely changed. Will never sound like a true muscle car but sounds damn good with little rasp, no popping, or mechanical sounds.
The blaaaah sound when the revs are dropping smoothed out alot and sounds more throaty.
TECH Fanatic
Joined: Jan 2003
Posts: 1,094
Likes: 0
From: Northern Va
Try mine for Comparison. I have a Magnaflow muffler with Bassani headers and catted y:
http://www.blackz28.com/Vids/Long%20Revs.wmv
http://www.blackz28.com/Vids/Long%20Revs.wmv
Thread Starter
Joined: Dec 2003
Posts: 2,152
Likes: 0
From: Virginia Beach, Va
Originally Posted by Dal1as
It's all in the y-pipe merge and exhaust setup. I'll explain in the end.
As for the sound. No it is not rasp. It is the exhaust depressurizing. All free flowing exhausts do it but the sound is more pronounced through an ORY, especially without cats. As for it sounding like hell, maybe if it's not setup correctly. First, almost all off the shelf y-pipes blow chunks. Check out the merges, especially on the inside and you'll be quite suprised. Get a custom one. After having a custom y made and getting most of the exhaust welded up the tone of my exhaust (Magnaflow, Jet hots, no cats) completely changed. Will never sound like a true muscle car but sounds damn good with little rasp, no popping, or mechanical sounds.
The blaaaah sound when the revs are dropping smoothed out alot and sounds more throaty.
As for the sound. No it is not rasp. It is the exhaust depressurizing. All free flowing exhausts do it but the sound is more pronounced through an ORY, especially without cats. As for it sounding like hell, maybe if it's not setup correctly. First, almost all off the shelf y-pipes blow chunks. Check out the merges, especially on the inside and you'll be quite suprised. Get a custom one. After having a custom y made and getting most of the exhaust welded up the tone of my exhaust (Magnaflow, Jet hots, no cats) completely changed. Will never sound like a true muscle car but sounds damn good with little rasp, no popping, or mechanical sounds.
The blaaaah sound when the revs are dropping smoothed out alot and sounds more throaty.
As far as having one custom made, how is the merge in the ones off the shelf different from one I would have made? How would I know wut to tell an exhaust guy as far as how I want it made? Im guessing I couldnt just trust any exhaust shop to fabricate one for my car that is decent.
I can understand how an exhaust can depressurize, but that the speed the engine is going at say 5k rpm's, it wouldn't do it the entire time for deceleration back to idle. Maybe the first half second is the sound of depressurizing, but not the rest of the time. Like it's been stated, the shape of the exhaust and internal construction determines the amount of rasp so changing parts out will change it.