Quiet exhaust?
Thread Starter
Instructor
Joined: Oct 2004
Posts: 179
Likes: 1
From: gainesville florida
Quiet exhaust?
Hi,
Unlike a post from a few days ago, I am looking to make my 71' as quiet as possible while balancing the loss of horse power.
Is the stock system the best for that?
I have seen { muskgeon brake} chambered systems. are they quiet? , would it work to add a muffler to the end of the chambered system or is that too much loss of power.
FYI , I have done a complete frame off , added 73' rubber mounts, trying to make it a better ride for trips, thus the quieter the better.
I have ordered a new ZZ4 with upgrades that bring it to around 400hp and 410 torque, rebuilt the rear end with a 3.08 for milage.
So don't want to sacrifice the extra money I spent to get to 400 hp by strangling it.
Any advice will be apreciated.
Thanks,
Jw
Unlike a post from a few days ago, I am looking to make my 71' as quiet as possible while balancing the loss of horse power.
Is the stock system the best for that?
I have seen { muskgeon brake} chambered systems. are they quiet? , would it work to add a muffler to the end of the chambered system or is that too much loss of power.
FYI , I have done a complete frame off , added 73' rubber mounts, trying to make it a better ride for trips, thus the quieter the better.
I have ordered a new ZZ4 with upgrades that bring it to around 400hp and 410 torque, rebuilt the rear end with a 3.08 for milage.
So don't want to sacrifice the extra money I spent to get to 400 hp by strangling it.
Any advice will be apreciated.
Thanks,
Jw
Melting Slicks
Joined: Jul 2002
Posts: 3,128
Likes: 3
From: Deltona (son of Deland and DAYTONA) FL
chambered exhaust is anything but quiet. They're basically straight pipes with a few crimps in them. You can see from one end stright out the other.
Check this outhttp://home.swfla.rr.com/woot/images/Movie.wmv this movie was with my 383 in the car. The L48 is a little quieter, but not much.
Check this outhttp://home.swfla.rr.com/woot/images/Movie.wmv this movie was with my 383 in the car. The L48 is a little quieter, but not much.
Last edited by isosceles; Aug 18, 2005 at 09:21 PM.
Le Mans Master
Joined: Aug 2000
Posts: 6,273
Likes: 14
From: Austin TX
I'm using Edelbrock RPMs with Summit Bullets as resonators. Both are stainless with perforated straight thru cores. Hi flow with acceptable sound level. An X crossover will also lower the dB while raising the pitch.
Race Director
Joined: Apr 2000
Posts: 17,654
Likes: 190
From: Who says "Nothing is impossible" ? I've been doing nothing for years.
I have Dynomax Super Turbos in the 3 in. version, I thought they were the best compromise between power and noise, meaning they flow fairly good and I don't set my neighbours car alarm off backing out of my driveway anymore like I did with the Flowmaster 40"s 
Race Director
Joined: Sep 1999
Posts: 11,358
Likes: 379
From: Plano TX
Originally Posted by tarheeljww
Hey,
I have never heard of Wlaker Quiet flows.
Are they as quiet as originals, but better proformance?
If so, thats what I'm looking for.
Thanks.
I have never heard of Wlaker Quiet flows.
Are they as quiet as originals, but better proformance?
If so, thats what I'm looking for.
Thanks.
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Team Owner
Joined: Jun 2004
Posts: 20,216
Likes: 4
From: Smile, it's just the internet.
Originally Posted by zwede
If you want quiet with decent flow you need to look into Walker Quietflows. Any muffler shop can get them. The bigger the case you can fit the better.
Thread Starter
Instructor
Joined: Oct 2004
Posts: 179
Likes: 1
From: gainesville florida
Thanks for the input.
No I'm not trying to be sneaky, just plan to drive this car, and want to be able to carry on a conversation while driving down the road,
My ZZ4 just arrived today, wasn't sopose to be here till next week.
Thanks again.
Jw
No I'm not trying to be sneaky, just plan to drive this car, and want to be able to carry on a conversation while driving down the road,
My ZZ4 just arrived today, wasn't sopose to be here till next week.
Thanks again.
Jw
Le Mans Master
Joined: Mar 2004
Posts: 7,437
Likes: 1,463
From: Little Rock AR
Dynomax Super Turbos make no noise at all while at cruise but they can make a fair amount at WOT. Idle is slightly louder than stock. Send me a PM with your email address if you want some sound clips. Very tame but great flow too. 
-Mark.
-Mark.
Team Owner
Joined: Jun 2004
Posts: 20,216
Likes: 4
From: Smile, it's just the internet.
A ZZ4 deserves a set of Magnaflow or Dynomax Ultra-Flo mufflers. They are MORE than quiet enough for this application. I've got them on my Lincoln...and it still sounds like a family sedan, but with a little attitude. I can NOT hear the engine at cruise, but WOT is healthy-sounding instead of a pathetic "whoosh".
I've also got them on my 350-powered pickup and it behaves the same, decent idle note, quiet cruise, and loud WOT.
They really are a great muffler design for all-around driving...good sound, great performance.
I've also got them on my 350-powered pickup and it behaves the same, decent idle note, quiet cruise, and loud WOT.
They really are a great muffler design for all-around driving...good sound, great performance.
Last edited by CGGorman; Aug 19, 2005 at 02:07 PM.
Race Director
Joined: Nov 1999
Posts: 10,643
Likes: 8
From: Foxfield CO 1970 Convertible
Wait a minute...why would someone want a *quiet* exhaust system?? Sounds pretty suspicious to me!! (Just kidding).
The stock systems were fairly quiet, but were deeper and more "throaty" than typical cars of the day. Starting in about 1974, they started getting real quiet. This was about the same time you would see women driving Vettes, and Vettes with air conditioning, automatics, and stereos (all the sissy stuff).
(Just kidding).The stock systems were fairly quiet, but were deeper and more "throaty" than typical cars of the day. Starting in about 1974, they started getting real quiet. This was about the same time you would see women driving Vettes, and Vettes with air conditioning, automatics, and stereos (all the sissy stuff).
Thread Starter
Instructor
Joined: Oct 2004
Posts: 179
Likes: 1
From: gainesville florida
Z-man,
Call me a sissy then, cause I would like to hear my stereo over the engine at cruising speeds. { nice car you have, what kind of wheels are they? } and I do have A/C.
Thanks for all the input.
Jw
Call me a sissy then, cause I would like to hear my stereo over the engine at cruising speeds. { nice car you have, what kind of wheels are they? } and I do have A/C.
Thanks for all the input.
Jw
Race Director
Joined: Apr 2000
Posts: 17,654
Likes: 190
From: Who says "Nothing is impossible" ? I've been doing nothing for years.
I can hear my 4 barrels open up for the first time with the Super turbos and I like to hear the stereo, nice change over what I am used too and I can candy cotton the 295's at 50 miles an hour if I feel in the mood
Melting Slicks
Joined: Oct 2004
Posts: 2,662
Likes: 8
From: Knoxville Tennessee
I don't understand. I can have a normal conversation with my wife at 70 MPH on a trip and I am currently running flow master 40's. In fact I was so impressed with a friend's side pipes and their wonderful sound, I will make that my next mod. And you can have a conversation with them at cruising speeds too. The good flowing exhausts are only loud when your toes are tickling the air cleaner.
Bernie
Bernie
Race Director
Joined: Apr 2000
Posts: 17,654
Likes: 190
From: Who says "Nothing is impossible" ? I've been doing nothing for years.
For stock 200HP motor you can run open headers and no one will notice, big difference in sound level when you start running 3 inch exhaust and have 550 to 600 HP under the hood. People would stop 20 feet hehind me at a red light when I had the 40's on mine
