Anyone running magnaflow Mufflers

[Mister 4x4]

Well, if you go to the Car Chemistry link, you'll notice the drop-down menu that shows what sizes are offered.   :shootself:

And you actually replied back to him in the long-ass thread way back in Oct 2017, Geoff (after he'd installed them and reported his results).   :whistling:

 …. Well, I'm old too. Can't remember what I did 5 mins ago, let alone back in Oct 2017!!

 I'll look that up again.

Thanks young man!

Geoff.

 The Dynamax Turbos is what my local muffler specialist suggested. I think I'll look at those as an option.

I went back and re-read most of the 2017 thread. Most of what has been asked in this post is mentioned in that thread.  However, I don't think the inserts are what I want to use.

lollerz

I looked at the inserts, and they actually reminded me a little bit of SuperTrapp mufflers/exhaust tips - the more plates, the quieter the sound.  I'm not so sure I'd want to jam something like that into my pipes either.

Back to the Magnaflows: the exhaust shop I went to for welding in the O2 Sensor bung and some hangers, was pushing the Magnaflows pretty hard when I was there... I had to remind them that my exhaust system (including the mufflers) was 'only' 6 actual years old (less than 2 months old, if you go by actual mileage).  I guess when I finally get the windows and HVAC squared away and can actually drive with the windows up, I'll give it some consideration if there's a drone with the Pype Street-Pros that came with my exhaust system.

 

[Hemikiller]

I had Dynomax Super Turbos on several cars and was very happy with the sound. If you want a slightly mellower tone, they offer a longer case model than the standard unit that'll still fit in the factory location. I'll have to look at the ones I have at home, had them on my '71 M-code XR-7 and the sound was just right.

 

[Stanglover]

I had Dynomax Super Turbos on several cars and was very happy with the sound. If you want a slightly mellower tone, they offer a longer case model than the standard unit that'll still fit in the factory location. I'll have to look at the ones I have at home, had them on my '71 M-code XR-7 and the sound was just right.

 Interesting comments.

Most seem to think they are a good choice. As I said before, I (and others) love the sound at idle of the Flowmaster40's and I don't mind the sound, windows down, once I get past the "drone zone", but it's that damn drone that needs to be gone.

Would you say they are similar in tone at idle to the Flowmaster 40's? (71 M code)

Geoff.

 

[Hemikiller]

No, they are quieter at idle than Flowmaster 40s. If you like the FM sound, but don't want the resonance, get the 50 series Delta Flow. We used to call them the "three chamber" back in the late 90s.

 

[keiths71]

Another muffler co. that is worth looking at is spin tech. My friend steve on this site has them on his 71 429 and they sound really good. They have a lot of products and options.

 

[Stanglover]

Hemikiller and Keiths71,

Thanks for the info. Sorry it's been a while to get back to you both.

I'll check those choices out.

Geoff.

 

[mbrew2]

Thanks to everyone for the input!

I had a set of turbo mufflers put on yesterday. It was a terrible stormy day down here so I didn't get a chance to really try them out until today.  I had asked the muffler shop for dynomax super turbos but they put on Walkers turbos. I have no idea what difference that makes but I can tell you it is like driving a different car. 

Idle is subdued with just a little sound. I really liked the Flowmasters at idle as one of the first things I heard when people looked at the car, even the Police, was how good it sounded when I idled through a parking lot. They were just too loud for regular driving.

Now I can hear the radio at all speeds and the turbos make pretty good sound when you open it up. No Drone. I guess we all have to sacrifice to make our cars work for the way we drive them but right now I think I'm happy with them.

One thing quieter exhaust confirmed is that my poor fuel mileage(on another post) is mostly my fault. Riding around in moderate traffic today, stop light to stop light, I heard the secondaries coming in on the carb in first gear. Never have been able to hear the engine before with the Flowmasters. I'll try to work on that but who doesn't like to hear a 4-barrel open up!

 

[Stanglover]

mbrew2,

Thanks for your comment on the mufflers. It great to get opinions on different brands. For me , still no idea what I'll go with. I want that FM40 sound, but zero drone and there's the hard part. A Mach 1 ought to sound beefy. A vert, not so much especially with the top down, It does however need to sound like it has an engine under the hood, not a sewing machine.

Your comment about gas mileage was interesting. Without going back to your post on poor gas mileage, I believe you have the Edlebrock carb. I have no idea how these are set up, but on my Holley 670, I can easily change the spring in the secondary vacuum pot. These carbs come with 2 different springs to tune the carb to ones needs. I run the heavier spring so the secondary's don't come on quite so fast. Perhaps your carb can be set up that way as well.

Geoff.

 

[mbrew2]

mbrew2,

Thanks for your comment on the mufflers. It great to get opinions on different brands. For me , still no idea what I'll go with. I want that FM40 sound, but zero drone and there's the hard part. A Mach 1 ought to sound beefy. A vert, not so much especially with the top down, It does however need to sound like it has an engine under the hood, not a sewing machine.

Your comment about gas mileage was interesting. Without going back to your post on poor gas mileage, I believe you have the Edlebrock carb. I have no idea how these are set up, but on my Holley 670, I can easily change the spring in the secondary vacuum pot. These carbs come with 2 different springs to tune the carb to ones needs. I run the heavier spring so the secondary's don't come on quite so fast. Perhaps your carb can be set up that way as well.

Geoff.

I wish I could have found a solution for the drone without silencing the sound so much. Turbos are way quieter than the FM40 but still make a little sound. They are far from what I would like to have but will work for now for the way I use the car as an everyday driver. 

I'm running a Summit 600 cfm carb now and its totally tuneable. It would probably be smart of me to follow your suggestion to modify the timing of the secondaries.

 

[Stanglover]

mbrew2,

Thanks for your comment on the mufflers. It great to get opinions on different brands. For me , still no idea what I'll go with. I want that FM40 sound, but zero drone and there's the hard part. A Mach 1 ought to sound beefy. A vert, not so much especially with the top down, It does however need to sound like it has an engine under the hood, not a sewing machine.

Your comment about gas mileage was interesting. Without going back to your post on poor gas mileage, I believe you have the Edlebrock carb. I have no idea how these are set up, but on my Holley 670, I can easily change the spring in the secondary vacuum pot. These carbs come with 2 different springs to tune the carb to ones needs. I run the heavier spring so the secondary's don't come on quite so fast. Perhaps your carb can be set up that way as well.

Geoff.

I wish I could have found a solution for the drone without silencing the sound so much. Turbos are way quieter than the FM40 but still make a little sound. They are far from what I would like to have but will work for now for the way I use the car as an everyday driver. 

I'm running a Summit 600 cfm carb now and its totally tuneable. It would probably be smart of me to follow your suggestion to modify the timing of the secondaries.

Ah, my mistake on the carb. Too many post to keep track of without going back to look each time.

As you say, I would still look at the secondary spring. I found it made a real difference to my mileage as long as I keep my foot out of it, but still barks if I want it to.

By the way, I'm thinking of upping to a Quick Fuel 730 carb. I feel the 4V could use a bit more air, but it might hurt the overall economy a bit. That's for another post though.

Geoff.

 

[bac]

For me , still no idea what I'll go with. I want that FM40 sound, but zero drone and there's the hard part. A Mach 1 ought to sound beefy. A vert, not so much especially with the top down, It does however need to sound like it has an engine under the hood, not a sewing machine.

Sorry to be coming in on this discussion late in the day, but if you're still looking I can confirm Magnaflows will still give you 90% of the FM sound at idle with zero drone at higher RPM.  I have done the FM ->Magnaflow conversion on three different Mustangs now with no regrets.

Another option that sound quite similar to Magnaflows without the price tag are Jones Full Boar Performance mufflers. Slightly less rumble than Magnaflows at idle but just as good when you step on it and around half the price!

 

[Stanglover]

For me , still no idea what I'll go with. I want that FM40 sound, but zero drone and there's the hard part. A Mach 1 ought to sound beefy. A vert, not so much especially with the top down, It does however need to sound like it has an engine under the hood, not a sewing machine.

Sorry to be coming in on this discussion late in the day, but if you're still looking I can confirm Magnaflows will still give you 90% of the FM sound at idle with zero drone at higher RPM.  I have done the FM ->Magnaflow conversion on three different Mustangs now with no regrets.

Another option that sound quite similar to Magnaflows without the price tag are Jones Full Boar Performance mufflers. Slightly less rumble than Magnaflows at idle but just as good when you step on it and around half the price!

 Brian, thanks for your reply and not too late. Good info for all.

Yes, I'm still looking for a good replacement set of mufflers. So many choices and opinions. Just hard to make up my mind.

Trouble is, my exhaust is still not "falling apart", so it may have to go one more year. Cash flow is limited and a new set of BFG's are on order for when it warms up and the car is back on the road.

mbrew2;

Bottom line is there are several options for mufflers available. I suggest to make a list and note the comment, then decide.

Geoff.

 

[Doc302]

Although it is a different animal I had magnaflows on my 2003 cobra and they were more quite then OEM on the highway, but had nice deep tone at idle and with hard acceleration.

I had flowmaster 40s on my 73 (429) and also experienced minimal drone at about 2500 -3000 rpm but did not notice it much because I have 4:11s so am above 3k at cruse most of the time. I now have super 10s and although louder then the 40s I have no drone. 40s sounded better at idle when I first moved to 10s but changed from x pipe to h pipe and improved sound at lower rpms. ( I know I probably lost 1-2hp at redline) for me flowmasters have a more authentic muscle car tone then magnaflows. Have you thought about super 44s they are supposed to have less drone also. Drone is due to resonance. This style of muffler uses resonance to enhance exhaust note tones. Some resonance and drone is inevitable. You may get less drone with 10s ( or cherry bombs- the most likely choice in these cars haydays)- but you will get more noise and still not be able to hear radio or have a conversation. Go to muffler shop that sells each listen to each in different cars. Watch out for counterfeit flowmasters not uncommon. Every setup is different and where that drone occurs will depend on more then just the muffler. It sounds like you lean towards quieter, but just in case 10s in most v8 mustangs probably illegal in most cities.

 

[bac]

Every setup is different and where that drone occurs will depend on more then just the muffler.

This is no doubt true but I've owned 3 different model year/engine/exhaust configuration Mustangs with FlowMaster 40s and they all had a signature bad drone between 2000-2500 rpm.

 

[Stanglover]

Every setup is different and where that drone occurs will depend on more then just the muffler.

This is no doubt true but I've owned 3 different model year/engine/exhaust configuration Mustangs with FlowMaster 40s and they all had a signature bad drone between 2000-2500 rpm.

 Soooooooooo! it's not just me who's car has that horrible drone between 2000 and 2500 rpm with Flowmaster 40's!

Reading through the many posts and opinions, I'm very tempted to try a pair of Summit Racing mufflers. Without going back to check exactly which ones, the comment was they sounded good and no drone and CHEAP! They are only about 35 bucks each if I remember. So with the current crappy exchange rate, I still would not be out of pocket too much if I don't like them. I'll go check and edit this.

Geoff.

 

[jorgem2]

Hello

I have magnaflows with 3” h pipes and 2 1/2 pipes after the mufflers and never a drone.

Loud at acceleration and full throttle but not too bad at cruising speed 55-75