head pounding Drone
Thread Starter
Intermediate
Joined: Sep 2008
Posts: 36
Likes: 0
From: Monroe GA
head pounding Drone
I need Help!! I have a 88 with a 383 and modified TPI to auto trans.I have Headmen headers that fead 3" pipe to a dual inlet cat to single 3" that goes to 2.25 split to two muffs.That is a mouth full.I have a reonating or drone at 1800-2300rpm that give a headache.If under WOT it is ok.I have had a turbo muffler set up and flowmaster set up with nearly the same result.Turbos were betterbut not great.My question is , are there any muffler that dont produce this drone or could I use a factory muffler without much loss.I drive this everyday and I cant afford Excedrin anylonger as gas is crazy! Help would be appreciated!!!
Le Mans Master
Joined: Jun 2006
Posts: 5,642
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From: One day you're a Comet...the next day you're dust... Arkansas
You can go to a factory style muffler and it will help. Corsa's should also help but they are expensive. The headers with a single cat cause a lot of the problem.
Le Mans Master
Joined: Dec 2002
Posts: 5,270
Likes: 3
From: Seattle Area WA
This happens with the Magnaflow catbacks. LD85 found that stuffing the inner pipes of each muffler with steel wool helped with the resonance and lowered the decibels.
I've also heard of people with X-pipes having less problems. You'd have to redo your center exhaust section.
I've also heard of people with X-pipes having less problems. You'd have to redo your center exhaust section.
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From: Overland Park Kansas
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Turbo and Flowmaster's have similar sound-deadening properties (i.e., not much).
On mine, I found that adding Magnaflow front cats made all the difference. I had loud side-pipes after the main cat, so I bet straight pipes after the center cat would still sound great on yours! A bonus would be the ability to pass a visual -- if ever needed.
If possible, make sure tail pipe extends a little past bumper. NOT TOO much though! Otherwise, you a busta you shin!
gp
On mine, I found that adding Magnaflow front cats made all the difference. I had loud side-pipes after the main cat, so I bet straight pipes after the center cat would still sound great on yours! A bonus would be the ability to pass a visual -- if ever needed.
If possible, make sure tail pipe extends a little past bumper. NOT TOO much though! Otherwise, you a busta you shin!
gp
Race Director
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From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019
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