flomaster exhaust drone
Thread Starter
Instructor
Joined: Nov 2002
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From: Lusby MD
flomaster exhaust drone
My 91 has a flomaster exhaust with a crossover pipe, sounds real nice when you get on it. The problem is the exhaust resonates in the car at lower rpms. There is a loud droning noise generated inside the car while driving around town. Has anyone else encountered this? Is there any fix other than remove flomasters? The Bose system helps alot :D but I'm looking for another solution.
thanks :seeya
thanks :seeya
Le Mans Master
Joined: Aug 2000
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From: Lost in the mountains of TN
Re: flomaster exhaust drone (Rays91L98)
Must be the L98 system. The LT systems don't have any drone to them. At leasnt my LT5 system doesn't. Do you know which muffler you have?
Racer
Joined: Sep 2002
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From: Mission Texas
Re: flomaster exhaust drone (Rays91L98)
Had Flowmasters on my 97 Tahoe and after 2 Yrs the drone finally got to me. I had them removed at my shop and replaced with Magnaflows. Unfortunately I feel the only remedy is to use a "bullet" muffler or switch to another brand of muffler. :seeya
Team Owner
Joined: Dec 2000
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From: SE NY
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Re: flomaster exhaust drone (Rays91L98)
I've gotten somewhat accustomed to mine and usually just down shift if I have to pull up a grade at low RPM.
You should have someone drive your Vette past you so you can hear it from outside.
You should have someone drive your Vette past you so you can hear it from outside.
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From: Compound in the Grove, Ga.
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Re: flomaster exhaust drone (BiZ)
Must be the L98 system. The LT systems don't have any drone to them. At leasnt my LT5 system doesn't. Do you know which muffler you have?
Race Director
Joined: May 2001
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Re: flomaster exhaust drone (Rays91L98)
The problem seems to come from the flowmaster 40 series mufflers more than the flowmaster cat-back system. It happens on Mustangs too, it's just the flowmaster droan RPM. The ones that don't have the droan don't sound as good from the outside.
Just ditch the bose and install something that you can turn up enough to drown out the exhaust :)
Just ditch the bose and install something that you can turn up enough to drown out the exhaust :)
Melting Slicks
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Re: flomaster exhaust drone (Nathan Plemons)
I have flowmaster 40 series mufflers on my car and it does have killer drone at around 1500-2000rpm. I shift around it. I don't really know what my car sounds like from the outside, but people tell me its pretty damn loud.
I know it has a really loud idle...
I know it has a really loud idle...
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From: Athens AL
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Re: flomaster exhaust drone (stormy652)
Flowmasters are like that. If you already have the crossover pipe, there aint much you can do about it.
Team Owner
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Re: flomaster exhaust drone (CarAteMyMoney)
I have the flowmaster cat-back and headers, it's annoying as hell. what's a good, QUIET performance muffler??
For L98s, the Power Effects can be quieted down because of the adjustability. All the others will have some resonance to varying degrees.
Drifting
Joined: Sep 2002
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From: Swanzey N. H.
Re: flomaster exhaust drone (Rays91L98)
I had Flowmaster 40 series mufflers with the new style Deltaflow design that was supposed to cut interior resonance, but it was still too much for me.
Unfortunately, you can't go to a 50 or 60 series because they are too long.
As much as I hated to, I changed to what is known as a Vortex muffler, and I still get some interior resonance, but only about half as loud as the Flowmasters. Power seems to be the same. The other thing I had done was to have a crossover pipe installed in front of the mufflers right after the pipes start to split apart from each other. I think that also helps. Good luck!!!
Unfortunately, you can't go to a 50 or 60 series because they are too long.
As much as I hated to, I changed to what is known as a Vortex muffler, and I still get some interior resonance, but only about half as loud as the Flowmasters. Power seems to be the same. The other thing I had done was to have a crossover pipe installed in front of the mufflers right after the pipes start to split apart from each other. I think that also helps. Good luck!!!
Melting Slicks
Joined: May 2002
Posts: 3,424
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From: Tucson Az
St. Jude Contributor
Re: flomaster exhaust drone (stormy652)
I have flowmaster 40 series mufflers on my car and it does have killer drone at around 1500-2000rpm. I shift around it. I don't really know what my car sounds like from the outside, but people tell me its pretty damn loud.
I know it has a really loud idle...
I know it has a really loud idle...
Thanks, Eddie
[Modified by edsalinas, 9:29 AM 12/3/2002]
Thread Starter
Instructor
Joined: Nov 2002
Posts: 159
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From: Lusby MD
Re: flomaster exhaust drone (edsalinas)
i have the crossover pipe in the same location right after the split. Guess i'll have to live with them for now. They were only put on 6 months ago and they do sound real good @ WOT :cool:
thanks for the advice on the vortex mufflers I might try that later.
thanks for the advice on the vortex mufflers I might try that later.
Racer
Joined: May 2002
Posts: 354
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From: Beach Cities SoCal
Re: flomaster exhaust drone (CarAteMyMoney)
I got Dynomax, super turbo's and rear y with cross tube delivered today...they'll be getting installed tomorrow. I'll let you know initial response tomorrow.
Can't wait to hear Le Difference!
:lol:
Can't wait to hear Le Difference!
:lol:
Instructor
Joined: Sep 2002
Posts: 159
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From: Denver CO
Re: flomaster exhaust drone (Rays91L98)
Anyone try to run 2 different size flowmasters on their vette? Maybe a 2 chamber on one side and a 3 chamber on the other? It seems that if you change the tone coming from one of the mufflers a little you wont get the resonating effect of the 2 tailpipes singing together at the low rpm. Maybe a small pre-muffler on just one of the tailpipes could help too. Not sure where it would fit though.
-Ken
-Ken
