Exhaust Drone!
Le Mans Master
Joined: Aug 2015
Posts: 6,090
Likes: 1,972
From: St. Charles MO
Originally Posted by ddahlgren
I had often thought the drone or at least part of it comes from the rear window cargo area floor combination. Anyone with a vert and top down care to comment?
PS - Or just wear a helmet all the time, LOL!
Last edited by MatthewMiller; Dec 23, 2017 at 02:15 PM.
Le Mans Master
Joined: Aug 2017
Posts: 6,939
Likes: 1,488
From: New Jersey
I had the oem reproductions on mine for a while. It just ended up being too quiet for me. Then I ended up with mid america's muffler eliminators. Drone is more or less the same and with the top on and windows up you have no problem holding a conversation. Not as loud as straight up muffler eliminators but you hear me take off from the light half a mile down the road in my backyard. My drone occurs around 3000 rpms which is pretty much only while accelerating... I have never been in a c4 with corsa mufflers so I can not comment. Also the 84 oem mufflers point at the ground instead of running out the back.
If you really want to know why I switched mufflers, here is the comparison between the two. Not that you would want to watch or anything...
And a pull with the eliminators...
If you really want to know why I switched mufflers, here is the comparison between the two. Not that you would want to watch or anything...
Last edited by 84 4+3; Dec 23, 2017 at 03:33 PM.
Thread Starter
Racer
Joined: Nov 2013
Posts: 338
Likes: 8
From: South NewJersey
I had the oem reproductions on mine for a while. It just ended up being too quiet for me. Then I ended up with mid america's muffler eliminators. Drone is more or less the same and with the top on and windows up you have no problem holding a conversation. Not as loud as straight up muffler eliminators but you hear me take off from the light half a mile down the road in my backyard. My drone occurs around 3000 rpms which is pretty much only while accelerating... I have never been in a c4 with corsa mufflers so I can not comment. Also the 84 oem mufflers point at the ground instead of running out the back.
If you really want to know why I switched mufflers, here is the comparison between the two. Not that you would want to watch or anything...
https://www.youtube.com/watch?v=IgChF2U027A
And a pull with the eliminators...
https://www.youtube.com/watch?v=R4oa...UK7HLw&index=6
If you really want to know why I switched mufflers, here is the comparison between the two. Not that you would want to watch or anything...
https://www.youtube.com/watch?v=IgChF2U027A
And a pull with the eliminators...
https://www.youtube.com/watch?v=R4oa...UK7HLw&index=6
Le Mans Master
Joined: Aug 2017
Posts: 6,939
Likes: 1,488
From: New Jersey
I've been told the later oem reproduction mufflers (walker) produce a bit more external sound while retaining the low levels of drone. The 84 was very quiet stock so gm allegedly made the later cars louder.
Drifting
Joined: Jun 2013
Posts: 1,590
Likes: 60
From: ft myers FL/Munising MI
I have hedman headers, and a X pipe....no cats...I stuck two little red "cherry bomb" glas packs into the ends of the x pipe and continued the pipes out the back. No drone at all...but you know I'm coming...
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Melting Slicks
Joined: Dec 2008
Posts: 2,772
Likes: 64
From: Mystic CT
I have a Y pipe 2 1/5 inch I think w/no cats magnaflow cat and Borla cat back. It will make your ears bleed with drone at cruising speeds. I have raced cars for over 45 years and this is just plain annoying.
Team Owner
Joined: Jul 2004
Posts: 28,413
Likes: 3,270
From: Hartford WI
I think the Borla is designed to be a noise maker for nostalgia if someone wanted to even swap mine with a Corsa, I'd be all over it. My cat back is too good to be dumped in the trash can so even if I get lucky enough and buy a used Corsa, 11415 and get it installed, I still have to do something about the used Borla. Kinda like herpes. Bad decision to go raw on the wrong girl and you pay for it for life.
Zen Vet Master Level VII
Joined: Mar 2016
Posts: 5,218
Likes: 1,174
From: Southlake, TX
Tech Contributor
Joined: Jun 2004
Posts: 20,847
Likes: 959
From: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.
I'm a bit confused. I suggested the H pipe to the OP. I would venture it would help you as well.
My ('69) headers dump into a Y behind the transmission, and Y back out under the differential to the two Dynomax mufflers at the rear. I did the single pipe between the two Y pipes because one big pipe weighs less than two smaller pipes. Despite the two Y pipes I still had drone at 1500 RPM. Installing the H pipe between the collector reducers got rid of most of the drone. The car is actually quite pleasant at non-WOT speeds.
My ('69) headers dump into a Y behind the transmission, and Y back out under the differential to the two Dynomax mufflers at the rear. I did the single pipe between the two Y pipes because one big pipe weighs less than two smaller pipes. Despite the two Y pipes I still had drone at 1500 RPM. Installing the H pipe between the collector reducers got rid of most of the drone. The car is actually quite pleasant at non-WOT speeds.
Tech Contributor
Joined: Jun 2004
Posts: 20,847
Likes: 959
From: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.
This is correct.
Franklin, you are wanting a bit of both ends of the spectrum; high performance low restriction that yeilds big power and throaty sound.... but with no drone. (corsa fans jump in here and smack me)
You have to have a strategy and then go for balance and your definition of balance.
Of all the countless threads on this subject the only consistent "Zero Drone" solutions come from choice of THE MUFFLERS and not combinations of the headers, cross over, X pipes etc. 2.5 vs 3 inch pipes.
So, for zero/lo drone your choice is either Corsa Mufflers or a OEM/Walker solution. Frankly it dosen't matter what you do upstream.
Franklin, you are wanting a bit of both ends of the spectrum; high performance low restriction that yeilds big power and throaty sound.... but with no drone. (corsa fans jump in here and smack me)
You have to have a strategy and then go for balance and your definition of balance.
Of all the countless threads on this subject the only consistent "Zero Drone" solutions come from choice of THE MUFFLERS and not combinations of the headers, cross over, X pipes etc. 2.5 vs 3 inch pipes.
So, for zero/lo drone your choice is either Corsa Mufflers or a OEM/Walker solution. Frankly it dosen't matter what you do upstream.
Melting Slicks
Joined: Dec 2008
Posts: 2,772
Likes: 64
From: Mystic CT
I'm a bit confused. I suggested the H pipe to the OP. I would venture it would help you as well.
My ('69) headers dump into a Y behind the transmission, and Y back out under the differential to the two Dynomax mufflers at the rear. I did the single pipe between the two Y pipes because one big pipe weighs less than two smaller pipes. Despite the two Y pipes I still had drone at 1500 RPM. Installing the H pipe between the collector reducers got rid of most of the drone. The car is actually quite pleasant at non-WOT speeds.
My ('69) headers dump into a Y behind the transmission, and Y back out under the differential to the two Dynomax mufflers at the rear. I did the single pipe between the two Y pipes because one big pipe weighs less than two smaller pipes. Despite the two Y pipes I still had drone at 1500 RPM. Installing the H pipe between the collector reducers got rid of most of the drone. The car is actually quite pleasant at non-WOT speeds.
Team Owner
Joined: Jul 2004
Posts: 28,413
Likes: 3,270
From: Hartford WI
I'm a bit confused. I suggested the H pipe to the OP. I would venture it would help you as well.
My ('69) headers dump into a Y behind the transmission, and Y back out under the differential to the two Dynomax mufflers at the rear. I did the single pipe between the two Y pipes because one big pipe weighs less than two smaller pipes. Despite the two Y pipes I still had drone at 1500 RPM. Installing the H pipe between the collector reducers got rid of most of the drone. The car is actually quite pleasant at non-WOT speeds.
My ('69) headers dump into a Y behind the transmission, and Y back out under the differential to the two Dynomax mufflers at the rear. I did the single pipe between the two Y pipes because one big pipe weighs less than two smaller pipes. Despite the two Y pipes I still had drone at 1500 RPM. Installing the H pipe between the collector reducers got rid of most of the drone. The car is actually quite pleasant at non-WOT speeds.
Thread Starter
Racer
Joined: Nov 2013
Posts: 338
Likes: 8
From: South NewJersey
I have an X pipe where the cat. converter used to be located. so where would I put the H? Why wouldn't the X pipe do whatever the H pipe was going to do? I dont mind loud exhaust. Its the harmonic DRONE that is in a small band of the RPM range. Ive checked its from 13-18ish hundred rpm. Im thinking of extending muffler tips out past end of valance.
Also was I correct when I saw Walker is Dynomax ? because thars what I have. they are about ten years old bought from Ecklers. like others have stated one side is functional. are they the same peeps said there was no drone with earlier?
Also was I correct when I saw Walker is Dynomax ? because thars what I have. they are about ten years old bought from Ecklers. like others have stated one side is functional. are they the same peeps said there was no drone with earlier?
