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Offline 70stang

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Quiet Muffler
« on: June 13, 2018, 08:15:45 PM »
I have a 1980 Pinto all original with 30K miles 2.3L which I replaced the old OEM muffler with a walker quiet-flow.
This muffler is loud!!

I looking to make this car quiet like a new car.
I replaced all pipes with 2", and removed the cat.
But I hate wasting money trying different mufflers.
I can find plenty of mufflers that will fit into the space.
I can modify the pipes as needed to fit the muffler, (I have a mig welder)
Does anyone know of a muffler that will quiet down thus car.

I have other high performance car with 3-1/2 exhaust header and Flow-masters.
If I want noise I will drive one of those.

I use the Pinto  for work and errands and everyone comments how loud it is and they cannot believe I have a new muffler on it.
AND YES I did check the entire system for leaks, no leaks the noise is from the muffler.

Thank you for any help you can provide.

Offline Wittsend

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Re: Quiet Muffler
« Reply #1 on: June 14, 2018, 10:32:30 AM »

 Does the muffler flow in either direction..., and if not is it properly oriented?  Not sure if that would help, just asking.  Have you contacted Walker?  Maybe the muffler is defective?


Strange that the muffler gets a very high rating at Summit 4.5 on 317 reviews.  But sometimes one persons noisy is another persons quiet.  That said your other cars 3-1/2" - FlowMasters have got to be LOUD! So, I do have an understanding of where your coming from for comparision.  BTW, I have a Valiant that drones incessently.  I've tried a number of different mufflers and have concluded that the large valve overlap is the greater cause of the noise.


I have a Dynomax on my daily driver Mazda Protege.  I got it at Pick A Part but judging by its appearnce I assume it is a Super Turbo. It has a bit of a burble at idle be overall it is decent for noise. On the Pinto I have the Turbo Coupe engine swap. I retained the T/C exhaust along with the CAT. I also used a Dynomax that I had replaced while on the T/C. How much the Turbo and the CAT cut noise I don't know.  It too is the Super Turbo (picture).  The Super Turbo sure is durable. My daughter in the picture is now 24.

Offline one2.34me

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Re: Quiet Muffler
« Reply #2 on: June 14, 2018, 04:10:38 PM »

Hi Wittsend,
I looked up the Dynomax Super Turbo, it has good ratings, but I noticed a complaint that its' glass stuffing burned out and the sound got louder and was like a fart can.
The Thrush glass pack on my '75 2.3 has become so loud that the car sets off car alarms in the neighbor hood and on the streets. My exhaust dumps down right before the rear axle.

When you jump on your Pinto, does it become what YOU would consider too loud? I trust your opinion as an actual 2.3 Pinto driver. I have to do something about mine before I get a ticket.
Thanks,
Jack
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Offline 70stang

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Re: Quiet Muffler
« Reply #3 on: June 14, 2018, 04:59:39 PM »
Hi

Thank you for the replies.
Yes the muffler is installed in the correct direction.
My high performance car with 3-1/2 exhaust header and Flow-masters is a V8 with a performance cam so it gives nice rumble and actually quiets down over 65mph.

The Pinto with the Walker Quiet-Flow muffler is a Roaring sound which gets louder over 65 mph.
At 80 mph the noise inside the car is really bad.
The muffler I have is: WALKER 21598 Premium Quiet-Flow Muffler.
Nice looking, good quality muffler, stainless steel but much to loud.

Walker does make other mufflers like the 18233 and the 18126 which will fit the car
but they are NOT stainless and I got the impression from the "SoundFX description that they are louder.

Does anyone have any experience with these?

Thank You

Offline Wittsend

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Re: Quiet Muffler
« Reply #4 on: June 14, 2018, 11:34:45 PM »
Hi Wittsend,
I looked up the Dynomax Super Turbo, it has good ratings, but I noticed a complaint that its' glass stuffing burned out and the sound got louder and was like a fart can.
The Thrush glass pack on my '75 2.3 has become so loud that the car sets off car alarms in the neighbor hood and on the streets. My exhaust dumps down right before the rear axle.

When you jump on your Pinto, does it become what YOU would consider too loud? I trust your opinion as an actual 2.3 Pinto driver. I have to do something about mine before I get a ticket.
Thanks,
Jack

At idle you hardly notice it is even a performance muffler. It basically sdounds stock But, again that is with the CAT and the turbo muffling at least some of the noise.  The ambient noise of the Pinto seems louder than the exhaust. By that I mean the raspiness is such that the exhaust note it only a contributor and not a dominant sound.  BTW, 2-1/4" on the exhaust. Should be bigger but I used what I had.

It is kind of hard for me to make a solid recommendation being we all have opinions and expectations.  I had a so-called "quiet" 3 chamber 50 series Flowmaster (3" pipe/single) on my Valiant and the droning from 1,900 to 2,600 RPM was like sonic warfare.  I went to a Raptor muffler at 2-1/4" and it helped - a little.  On that car I attribute the large overlap of the cam (Edelbrock Performer) to be the culprit.

Offline one2.34me

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Re: Quiet Muffler
« Reply #5 on: June 15, 2018, 04:01:06 PM »

Thanks Wittsend,
The Dynomax Super Turbo muffler sounds like what I'm looking for. I'm looking at the Dynomax 17749 on eBay. One review says it's quiet at WOT with a built 351.
Thanks again,
Jack
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Offline douglasskemp

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Re: Quiet Muffler
« Reply #6 on: June 17, 2018, 08:07:00 PM »
Just my 2, but a bunch of the noise may be due to your removal of the cat. Yes it may cause some restrictions in the exhaust flow, but it also does quite a bit of reduction of noise.

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The Pinto I had I gave to my brother. The car was originally my mom's, (78 red Pinto sedan with a 2.3 and a 4spd.) I am originally from Tucson, AZ but moved to Oxnard CA :D
I'm looking for a Pinto wagon with an automatic.

Offline one2.34me

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Re: Quiet Muffler
« Reply #7 on: June 19, 2018, 11:28:11 AM »
I think you guys are right. With the stock '75 intake and catted exhaust, the car was very quiet, even though the original muffler was tiny. The cat must have been sucking up a lot of the exhaust note. It does amaze me how loud this little low HP 4 cylinder is now when pushed.
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Offline douglasskemp

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Re: Quiet Muffler
« Reply #8 on: June 19, 2018, 02:49:51 PM »
When the cat died on my 2.3 87 Mustang, I put a stock replacement cat and a glasspack muffler. Made it sound like a WWII Jeep. My mom's 78 ended up having the cat disintegrate and plug up the exhaust flow enough that we had to cut the pipe before the cat. That was SERIOUSLY loud. Almost as loud as when we rebuilt the 390 in my truck and had to start it without the exhaust connected.

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The Pinto I had I gave to my brother. The car was originally my mom's, (78 red Pinto sedan with a 2.3 and a 4spd.) I am originally from Tucson, AZ but moved to Oxnard CA :D
I'm looking for a Pinto wagon with an automatic.

Offline pinto_one

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Re: Quiet Muffler
« Reply #9 on: June 21, 2018, 09:03:49 AM »
muflers today are not like the ones of years ago ,, back then I use to put on glasspacks (cherry bombs) and they cam in diffrent lenghts , longer was more quiter , at least until the packing inside burned out ,the older muffers had more baffles in them , your are right when the started using cats the didnot have to use much baffleing inside the muffers,  I went through the same problem trying to make my pinto almost noise free, bad thing is I have a V-6 with headers , used a walker muffler , not to bad but not quite,  tryed a NOS muffler (Midas brand ) corvair turbo muffler , that did the trick , now i can hear my radio ,  most muffler shops do not know anything about mufflers , they only have stock replacements or noisy replacments , the old guys knew how to make the noise go away ( short of sticking a water heater size truck muffler under your pinto ,  I do know some did have resinators ,
76 Pinto sedan V6 , 79 pinto cruiser wagon V6 soon to be diesel or 4.0