Thread: Mufflers

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As an aside, I wonder how many folks remember or learned the origins of the "Turbo Muffler".
Hint, 1962.

The Turbo Corvair?????

Actually the Allis Chalmer WD45 muffler was earlier and the diesel one was 2"-------------

Originally Posted by Bob Parmenter

As an aside, I wonder how many folks remember or learned the origins of the "Turbo Muffler".
Hint, 1962.

Originally Posted by Dave Severson

The Turbo Corvair?????

Yeah, the first I recall is the one that Walker made for GM for the '64 Corvair, 2.5" in & out and only about a foot long. The Hemi's of the day had a similar design, but longer than the "turbo".

and then there was a farm boy making mufflers outta 4 in tractor sleeves and with grease gun tube for the ends---coat hangers wautted up with steel wool packing---------

I run Dynamax Ultraflows in my deuce. They are a bit loud for some people, but nothing screams horsepower like they do. And they are one of the best flowing mufflers out there. My second choice would be ss Magnaflows. I dislike the tinny sound of Flowmasters, myself.

Originally Posted by rspears

Mike, those HushpowerII resonators say that they are intended to run in conjunction with HushpowerII mufflers. You're running the resonators alone and it's not too loud?.

No, it's not to loud. the full length pipe helps knock it down. And when it was inspected (and as it is annually) the inspector is impressed to see shiny stainless mufflers! LOL.. I figured if it was to noisy I could always add mufflers later.

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I like stainless because it don't rust but on a Hotrod I use a stainless system with Smithy mufflers, gives a nice hotrod sound but not aggressively loud like a Cherry Bomb, Also about 11 years ago I put a pair of Jones mufflers on Sue's car and they gave a lovely sound and are still perfect to this day and they were only $17 each !!!

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Roger i looked long and hard for the right muffler and went with hush power after i saw one cut open at a display at the drags... it has heat wrap inside and made to go real close to the floor or what every with out heat damage... also i needs something long and skinny to fit in the car.. they sound good too... that is the one thing that bugged me you pay all that money for mufflers and then if you don't like them you have two paper weights..

I chose Borla Pro XS 304 stainless steel, oval shaped mufflers, 2-1/2". I got the model with offset inlet and outlet. The exhaust can flow either direction with these mufflers. That was good for my car. I needed a center inlet on one side and the offset inlet on the other side, to get clear the booster diaphragm and get the pipes to exit out the back in the same location, on both sides.

The sound is plenty aggressive, but not too loud, IMO. They are louder than any production car muffler would be.

My exhaust manifolds had 3" collectors, so I used 3" pipe for the first elbow and added a 3" flex coupling, before reducing to 2-1/2" pipe for the rest of the system. Stainless pipe expands more than regular steel, so the flex coupling is good to have.

Thanks Wayne. I really like the layout of your system and the Hushpower's look like a very good choice. I'm impressed with that H-pipe layout, and I had not previously noticed your drop down below the axle exit in the back. I went back to your build thread for a shot of the rear, and with the quick change and your tail lights that low exit looks great. Gotta get my diff painted so I can get the chassis on wheels & tires, engine & tranny in place and start figuring out details. My wrench buddy who's putting my new gears in the third member admitted yesterday that his special dial indicator setup had "disappeared" from his tool box, and he's been waiting for the new one to arrive.... I'll have my gears later today, paint the diff tomorrow, and on to some assembly Monday/Tuesday.

FWIW Hushpower is owned by Flowmaster or vice versa, I can't remember. I have used some flowmaster diesel mufflers on some diesels, as well as some hushpower, and the hush power to me sounded better. I like the Flowmaster on a gas engine, but I agree without a H pipe they sound tinny and get annoying. I have some friends that just installed some of the Summit flowmaster knock offs, and they don't resonate like a flowmaster and do sound pretty good.

I have nothing to go by but my personal experience with straight through glaspaks compared to open pipes. The ones with a louvered inner core (like lovers on a hood) will lower the sound but will not change the tone. It will keep the high sounds which give it a tinny effect. The ones with a preforated inner core (small round holes) will not only lower the sound but also lower the tone giving it a more mellow lower sound. Have tried it on both small block chevys and fords and the results are the same. Just my two cents worth. Don't know why this happens. My 28 has a hot 302 in it with 7" preforated cores in a 20" sidepipe. With no insulation in the cab, the exhaust drone is pure heaven. Very deep and powerful. Heh, what did you say? Speak up, I can't hear you....

Milner

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As Bob mentioned exhaust sound is sooooo subjective when it comes to personal tastes.

When I was first getting into to this stuff in the mid 60's there were only about 3 choices for other than stock mufflers that were common, at least in the area I was at; Glasspacks ( the old blue walker continentals sold thru NAPA), The Corvair Turbo mufflers and the MOPAR HEMI mufflers (which were actually used on all the high performance 383/440 back then to include the cop cars).

The glass packs were the cheapest, loudest and most popular and therefore the sound I grew up associating with high performance cars. Over the years I've used all kinds of different mufflers on the various builds but on my cars it was usually the Turbos or glass packs.

The 57 Plymouth is now on it's 3rd pair (and probably last) pair of mufflers. I initially started off with a pair of Dynomax. I hated the sound from the first time I turned the key and they only stayed on as long as it took to get a pair of reproduction HEMI mufflers ordered and delivered. I really enjoyed the sound.....it took me back to the days of the new Road Runners, GTXs and State Patrol cars coming into the dealership I started out in. I ran them for about 6 years bu after a while every time I ran thru the gears I wished they were a bit louder. Last year I finally bit the bullet and thru a set of glass packs on it. As far as I'm concerned the cars now sounds exactly like it should.



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I played around with building some a few years back for a few of our rock crawlers. I was really surprised at how simply most of the high dollar mufflers are built. I have a good friend here in town that does a lot of muffler work and has a lot of flow testing equipment for them. After doing some research I found that they are very easy to build and in some cases I could achieve a good sounding muffler with the same or better flow characteristics than the brand named mufflers In some really small boxes. A few of my creations.