Disappointed with my flowmaster exhaust upgrade

[kevinb]

I had a muffler shop replace my stock muffler with a Flowmaster Delta 50. It sounded pretty good. Had a nice deep rumble but not quite as loud as I expected or hoped for. So then I had them cut the resonator off, thinking that would make it a little louder. However, it was substantially quieter and a little higher pitch. (The opposite of what I wanted or expected). The muffler shop said it was impossible to be quieter and I thought so too, but its absolutely quieter.

So I got a Flowmaster Super 44 and had the resonator put back on. The super 44 is a two chamber 13" muffler, compared to the Delta 50 being a 3 chamber 17"muffler. So naturally I expected it to be a little louder. It's not, Its very much quieter than the Delta 50. Seriously, it is barely louder than stock and not audible at all at cruising speed. Not nearly as loud as the wind noise with the windows closed. I have looked and confirmed that the muffler is not installed backwards.

None of this adds up in my mind. Everything I have done has had the opposite effect of what I expected. For reference, this is connected to a 5.0 L 2023 F150 RCSB. Does anybody else ever experience this phenomenon or have an explanation?

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[sporkfed]

I could believe it. The factory exhaust on the Coyote is actually pretty decent, just not very loud unless at higher RPMs. If you put random resonating cavities, whether it be mufflers or resonators, in line with the exhaust, you will get random cancellations and resonances, and they may be unpredictable if they weren't designed together. You might end up cancelling the good sounds and enhancing the bad ones. Also, it's possible the shop is not using the right exhausts for your engine. They could be putting other models on, since that was what they had in stock. Double check the model numbers or call Flowmaster.

 

[White95]

Frankly speaking, the cats are choking the volume you are seeking. I know it’s probably an unpopular option (if not illegal in some markets) to remove them but it’s a viable option.

Not Flowmaster equipped but here’s my truck an example:



edit:

My setup has the cats removed, a Vibrant Ultra Quiet resonator, a Magnaflow muffler (#12249) with the factory tail pipe slightly rerouted and shortened.

 

[staying_tuned]

Corsa ftw and be done with it.

 

[White95]

Corsa ftw and be done with it.

I don’t disagree. Most of the time, when people start adding things like Headers and and such, Corsa then becomes unbearable lol

 

[RCSB]

Frankly speaking, the cats are choking the volume you are seeking. I know it’s probably an unpopular option (if not illegal in some markets) to remove them but it’s a viable option.

Not Flowmaster equipped but here’s my truck an example:



edit:

My setup has the cats removed, a Vibrant Ultra Quiet resonator, a Magnaflow muffler (#12249) with the factory tail pipe slightly rerouted and shortened.

What replaced the factory y pipe with the cats?

 

[wz00r2]

Are you stating that its quieter IN the cab vs stock? You post seems to relay that you want the sound louder in the cab? I feel like most try to avoid this.

That being said, I have the Corsa system, and it sounds amazing with plenty of sound in the cab with no drone. Prior to that, I had a Corsa muffler welded in place of the stock one and it was also pretty nice for the cost.

 

[White95]

What replaced the factory y pipe with the cats?

We removed the cats and welded in sections of piping.

 

[MGF150]

We removed the cats and welded in sections of piping.

Without going back to the beginning, I have followed your post, and am very impressed. I hope someone does a 2024 tuner soon.
Are you running E85 or are those times on gas?

 

[RCSB]

We removed the cats and welded in sections of piping.

Did you get a CEL?

 

[White95]

Without going back to the beginning, I have followed your post, and am very impressed. I hope someone does a 2024 tuner soon.
Are you running E85 or are those times on gas?

Hey, thanks! This truck has been very responsive to anything I’ve done to it and never ceases to amaze me. All of my passes have been made on E85 except for the first pass off the showroom floor on 87 octane.

Did you get a CEL?

yes, I did. I added a pair of non-foulers stacked, with the upper one drilled out to facilitate the oxygen sensor. No issues until recently as the bank 1, rear o2 has been flaking lately. I don’t know if that’s condensation developing, or what but otherwise haven’t had any issue.

 

[FaaWrenchBndr]

Flowmaster is pretty much garbage. The only thing I ever sounded good on was the 1990s Mustang 5.0

I’ve been running magnaflow since about 2000. Much better system in my opinion.

 

[White95]

Flowmaster is pretty much garbage. The only thing I ever sounded good on was the 1990s Mustang 5.0

I’ve been running magnaflow since about 2000. Much better system in my opinion.

On my Mustang forum, we call them flowdisasters.

 

[LFRoss]

Are you stating that its quieter IN the cab vs stock? You post seems to relay that you want the sound louder in the cab? I feel like most try to avoid this.

That being said, I have the Corsa system, and it sounds amazing with plenty of sound in the cab with no drone. Prior to that, I had a Corsa muffler welded in place of the stock one and it was also pretty nice for the cost.

What was the Corsa Muffler you had welded in the stock location? Did you keep the resonator with that setup? Looking for something to have a shop do rather than pay around a grand for Metal pipes. Plus my wife’s also said not to make the truck louder so if I can do it anyway without spending a bunch of money I may only sleep on the couch one night instead of multiple

 

[Pelican]

Frankly speaking, the cats are choking the volume you are seeking. I know it’s probably an unpopular option (if not illegal in some markets) to remove them but it’s a viable option.

Not Flowmaster equipped but here’s my truck an example:



edit:

My setup has the cats removed, a Vibrant Ultra Quiet resonator, a Magnaflow muffler (#12249) with the factory tail pipe slightly rerouted and shortened.

That sounds great

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