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Username Post: Mufflers opinions        (Topic#354103)
1966caprice327 
Poster
Posts: 54

Reg: 06-26-18
11-28-18 06:18 AM - Post#2752634    

Muffler selection on my caprice is flowmaster 40s with a 2.25 dual exhaust system with a balance pipe,anyone have opinions on a deeper tone muffler? Car also has factory exhaust manifolds,also I have a 327 motor as well



 

Ecklers AutoMotive

Whitetail Hunter 
Contributor
Posts: 147
Whitetail Hunter
Age: 50
Loc: Green Bay Wisconsin
Reg: 03-28-15
11-28-18 11:48 AM - Post#2752677    
    In response to 1966caprice327

I have a big block with headders. 2 1/2 pipe (no crossover) with magna flow mufflers. I like it. Bet it would sound good with stock manifolds. They are stainless steel and lifetime warranty.



 
1966caprice327 
Poster
Posts: 54

Reg: 06-26-18
11-28-18 01:36 PM - Post#2752690    
    In response to Whitetail Hunter

How’s it sound on the highway,my flowmasters after 60 kind of quiet out



 
Texasray 
"3rd Year" Silver Supporting Member
Posts: 73
Texasray
Loc: Texas
Reg: 11-01-16
11-28-18 02:42 PM - Post#2752699    
    In response to 1966caprice327

I have just received Dynomax Super Turbo in 2 1/2 to replace my Magnaflow that came with the 15165 system. The Magnaflows are straight thru with perforated core. Just too load at cruise speed, may be better if I had not exited behind the rear wheel. Kit came with both tailpipe sets but the back exit did not suite me visually. The wife and neighbors say they can here me coming home 2 miles away. Hope when I get the super turbos the sound will be a bit mellower. I do like the quality of the Magnaflow kit.

Sam



 
1966caprice327 
Poster
Posts: 54

Reg: 06-26-18
11-28-18 05:19 PM - Post#2752727    
    In response to Texasray

Herd those mufflers were food,I am still undecided on what to change too my flowmasters are a year old but sound wise it’s not deep enough for my liking



 
Whitetail Hunter 
Contributor
Posts: 147
Whitetail Hunter
Age: 50
Loc: Green Bay Wisconsin
Reg: 03-28-15
11-28-18 08:04 PM - Post#2752738    
    In response to 1966caprice327

Little loud but I have 373 gears and a 3 speed trans. 65/70 highway speed I am turning 3000 RPM.



 
toro455 
"4th Year" Silver Supporting Member
Posts: 527
toro455
Loc: Western NY
Reg: 06-15-02
11-28-18 08:29 PM - Post#2752742    
    In response to Texasray

Sam,
My '68 isn't back together yet but I also bought the Magnaflow kit (really good value especially considering the 2 exit options). I know you wrote you didn't like the exit out the rear. I don't like when they exit straight out protruding past the bumper either but I thought they might look good if the pipes were tucked up and angled down with an angle cut parallel to the ground. That's what GM did on the 1995 Impala SS but they also added a resonator in the area just outside the frame rails. I wonder how the Magnaflow would sound with a resonator tucked up inside that area if there is room.

Based on what you wrote I guess if I use the Magnaflows I need to start thinking about the resonator.

Scott



 
1966caprice327 
Poster
Posts: 54

Reg: 06-26-18
11-29-18 03:54 AM - Post#2752754    
    In response to toro455

Are the magaflow mufflers deeper tone then the flowmasters 40s



 
Texasray 
"3rd Year" Silver Supporting Member
Posts: 73
Texasray
Loc: Texas
Reg: 11-01-16
11-29-18 04:34 PM - Post#2752830    
    In response to toro455

When I took it to the bodyshop the rear exit tailpipes and Gibson 500366/365 outlets were on the car, no bumper. During the process it was decided that instead of cutting perfect no hit '66 bumpers I would buy fiberglass bumpers. What could be easier to work with, by tucking the exhuast up into the bumper 1/2 way looks good on some cars but not what I envisioned. So the outlets and rear exit tailpipes sit in the garage with all the other extras from this build.
It may look great if someone wanted to cut their OE bumpers to correct the fit then cut a recess to tuck the exhaust up 1/2 way. Just not with a painted fiberglass bumper, the chrome tips just would not due.
Ideas change during a build, I learned a long time ago not to let it bother me. It always looks better in your mind. Or in my mind anyway, that may just be me.
I think it would have sounded great with resonators before the magnaflow mufflers and the rectangular Gibson tips, but...
Sam



 
toro455 
"4th Year" Silver Supporting Member
Posts: 527
toro455
Loc: Western NY
Reg: 06-15-02
11-29-18 08:00 PM - Post#2752848    
    In response to Texasray

I was thinking of tucking them up and then outlets just prior to the rear valance; no bumper or valance cutting. Similar to what you wrote... to me it looks good in my mind

Hemmings has a capture from the side view of a 94-96 Impala SS which basically shows the concept; need to of course envision how it would look on our cars I copied the link below:

https://www.hemmings.com/magazine/mus/2007/12/ 1994...

Going back to the original question I always liked the sound of Flowmasters but it also depends on the motor and the rest of the exhaust. I also had one with a really annoying drone at 45-50mph which drove me crazy. I unfortunately have not heard my Magnaflows yet so I cannot make a comparison.

Pypes is another possibility. They had decent database of videos which you could select by engine type and exhaust diameter if I recall correctly.

Scott




 
Texasray 
"3rd Year" Silver Supporting Member
Posts: 73
Texasray
Loc: Texas
Reg: 11-01-16
12-04-18 08:49 AM - Post#2753329    
    In response to toro455

OK just to give a review on the Magnaflow vs Walker Turbo. It is quieter in the car, 2100 rpm @ 60 in 5th, 2000 rpm @ 80 in 6th. Also the wife did not hear me till I was about 500 yards away. That is good. Deleted the sound meter off my phone when I retired (no longer worried about industrial noise) so I can not give actual decibels but I can hear the stereo very well now.
I think the main difference is the pulsation exhaust sound with the Magnaflow and the smoother sound of the Walker. I would guess this is due to double 180 turns in the Walker. I am sure it is probably a bit more restrictive but I am not lacking for power.
Both were 14x5x9 with 2.5 inlet & exit. I had to add a short piece of exhaust pipe to the inside of the Walker exit due to both pipe and exit being 2.5 i.d..
The Walker is Aluminized and stainless for the Magnaflow.
I think if I had continued the plan to rear exit the exhaust I could have added resonators to the tailpipes next to the fuel tank and lower some of the sound out of the Magnflows.
It's always a work in progress, if I do that in the future I will post up my results. Hope this helps someone.

Sam



 

Ecklers AutoMotive

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