No more drone!!

RobP · Apr 14, 2017

When I bought my car it had Flowmaster 40's on it and it droned so bad I wouldn't drive it without earplugs. I quickly replaced them with Dynomax Ultraflows and it reduced the drone to a somewhat acceptable level, but still had a "sweet" spot in 3 gear that was tiresome. Fast forward to last week and I had a set of QTP electric cutouts installed and no more drone!! If you just open the cutouts a little bit not only does the car sound GREAT, it also has zero drone.
If you open them 1/2 to full they are VERY loud, but still don't seem to drone. I took it out for a long drive this afternoon and it was the most enjoyable drive so far

69L48Z27 · Apr 14, 2017

Good tip, thx!

Dennis H · Apr 14, 2017

Good deal. Enjoy your ride

HT413 · Apr 14, 2017

always hated flow bastards.

Photon440 · Apr 14, 2017

Good to 'hear'.

When I saw your title, I expected to find out that you had shot your neighbor's spy drone out of the air or something like that...

Cornpatch MO · Apr 15, 2017

RobP said:
When I bought my car it had Flowmaster 40's on it and it droned so bad I wouldn't drive it without earplugs. I quickly replaced them with Dynomax Ultraflows and it reduced the drone to a somewhat acceptable level, but still had a "sweet" spot in 3 gear that was tiresome. Fast forward to last week and I had a set of QTP electric cutouts installed and no more drone!! If you just open the cutouts a little bit not only does the car sound GREAT, it also has zero drone.
If you open them 1/2 to full they are VERY loud, but still don't seem to drone. I took it out for a long drive this afternoon and it was the most enjoyable drive so far

I have Flowmaster Super 44's with 2 1/2" exhaust pipes , X pipe, 2" tailpipes , 440 engine. Boom matt and heat duct insulation from firewall to back of rear seat. full carpeting. What is this " drone" you all speak of? Love my Flowmasters and sure as heck ain't gonna scrap perfectly good mufflers ................................MO

Jason69 RR · Apr 18, 2017

Love my flow master 40 series Delta. Maybe now that you discovered the "fix" with the dumps, you should put the flow masters back on! Cheers!

RT68440 · Apr 26, 2017

I absolutely love the sound of Flowmasters. I have an 03 Mustang with Super 44s, and have always loved how they sounded on Mustangs. Right now the Charger has a 2 1/2" TTI exhaust with an H pipe and headers with the Dynomax mufflers. It sounds good but one thing that I really want to do is change the mufflers to a set of 40 Series Flowmasters. I know that its going to drone but I'm hoping that lining the inside with Dynamat will help. I don't mind with the Mustang because its a street/strip car, but the Charger is going to be a cruiser...I just really like the sound of the 40 Series...

Cornpatch MO · Apr 26, 2017

RT68440 said:
I absolutely love the sound of Flowmasters. I have an 03 Mustang with Super 44s, and have always loved how they sounded on Mustangs. Right now the Charger has a 2 1/2" TTI exhaust with an H pipe and headers with the Dynomax mufflers. It sounds good but one thing that I really want to do is change the mufflers to a set of 40 Series Flowmasters. I know that its going to drone but I'm hoping that lining the inside with Dynamat will help. I don't mind with the Mustang because its a street/strip car, but the Charger is going to be a cruiser...I just really like the sound of the 40 Series...

I have FM Super 44's I also have Boom Matt and furnace duct insulation from firewall to back of rear seat . I like my Flowmasters and don't know what the "drone" is. I would like to know what the Dynomax's sound like for comparison. ..............................MO

ws27 · May 1, 2017

RobP said:
When I bought my car it had Flowmaster 40's on it and it droned so bad I wouldn't drive it without earplugs. I quickly replaced them with Dynomax Ultraflows and it reduced the drone to a somewhat acceptable level, but still had a "sweet" spot in 3 gear that was tiresome. Fast forward to last week and I had a set of QTP electric cutouts installed and no more drone!! If you just open the cutouts a little bit not only does the car sound GREAT, it also has zero drone.
If you open them 1/2 to full they are VERY loud, but still don't seem to drone. I took it out for a long drive this afternoon and it was the most enjoyable drive so far

Does your car have a cross over? Usually a crossover will get rid of drone. Just curious.

RobP · May 2, 2017

ws27 said:
Does your car have a cross over? Usually a crossover will get rid of drone. Just curious.

I do have an X-pipe.
I do have new rear quarters and they don't have any sound deadening on them like they come from the factory. I wonder if that was contributing to the drone?

drobertson · May 8, 2017

I like the sound of flowmasters from outside the car. But I hate the inside droning. What blew me away, is how good the cheapo "raptor" turbo mufflers from my local NAPA sounds. They have a deep rumble, with a little crackle with high a high rev, and have almost no interior resonance.

HT413 · May 9, 2017

drobertson said:
I like the sound of flowmasters from outside the car. But I hate the inside droning. What blew me away, is how good the cheapo "raptor" turbo mufflers from my local NAPA sounds. They have a deep rumble, with a little crackle with high a high rev, and have almost no interior resonance.

Same thing I did. Took the old flow bastard 40's off and tossed them in the dumpster. Then I bought some el cheapo $30 Summit turbos and couldn't be happier. No resonance, just a nice deep sound with a little crackle. At speed they quite down real nice.

At the time I wasn't so sure how they'd sound so I bolted them on. Now I don't think I'll weld them, this way if they rot out, I'll toss them in the dumpster and throw on a new pair.

RobP · Jul 16, 2017

Here's a short drive by video with the cutouts open about 1/2 way under normal acceleration.

No more drone!!

RobP

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69L48Z27

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Dennis H

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HT413

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Photon440

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Cornpatch MO

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Jason69 RR

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RT68440

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Cornpatch MO

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ws27

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RobP

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drobertson

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HT413

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RobP

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