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Thread: Exhaust System Questions
          
   
   

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  1. #16
    Matthyj's Avatar
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    i have installed magna flows and like them, i put on a flow master for my buddy and love its sound as well, both kits are nice but i just prefer the stainless mufflers of magna flows over the steel flowmasters. i am a huge stainless fan as it wont ever need replacing. i personally would go as large as possible without getting crazy
    Why is mine so big and yours so small, Chrysler FirePower

  2. #17
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    Here is a suggestion on HP vs. Exhaust Pipe size-

    How To Calculate Muffler Size and Exhaust Pipe Diameter - Exhaust Videos | Exhaust Videos

    It looks like their suggestion would be to use a 2 1/2" Pipe, but I would take that with a grain of salt-according to their chart I should be using a 3 1/2" Pipe on my Car, but there simply isn't the room to run that size unless I jack the Car up and hang it below the Frame (ain't gonna happen )-

    I went with a 3" system (850hp), and I'm actually running 4 Mufflers (2 Bullets and 2 Magnaflows), so, obviously, space must be considered in your plans as well-

    I ceramic coated my Exhaust (inside & out)-

    I think the sound of Mufflers is such a subjective thing, however I prefer the old "Turbo" sound (deep throated down low), so that is why I picked the Magnaflows-I think Flowmasters sound really good on a Ford engine though (not so much on a GM engine)-
    Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac?
    -George Carlin

  3. #18
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    With all that said---------

    The difference between "H" and "X" pipes------

    On a H pipe system you are balancing the pressure pulses between sides of the exhaust which will effect sound------On a X system you are building a system where the different momentary volumes/pressure of the exhaust side to side can balance out(sound) and the flow can exit the system from there back via BOTH sides of the system--why is that important???? well its because the firing orders of the v8 engines aren't 180 degrees side to side but have 2 cylinders firing 90degrees apart on the same side while the other side has a rest period------for instance cylinders 5 & 7 on chev-------- create overload on left bank exhaust while right bank has gap--
    then the left side can use both sides of system after the X
    Last edited by jerry clayton; 11-30-2016 at 07:52 AM.
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  4. #19
    DennyW is offline CHR Member Visit my Photo Gallery
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    Does anyone remember these from the old days ?

    Attachment 66651
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  5. #20
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    And they would fit because of the front sump oil pan------

    Remember the headers on the Ford OHC Indy engine?????????

  6. #21
    DennyW is offline CHR Member Visit my Photo Gallery
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    You mean these ? Yes, very cool stuff back then...

    Attachment 66655
    Attachment 66656
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  7. #22
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    I have been looking at the exhaust pipe I can buy. Does anyone know the difference between the Speedway pipe which is "Mild Steel" non-aluminized and the Jegs pipe which is called off as aluminized? Both are 16 gauge.

    Basically I need to know what "aluminized" means. When I am all done my goal is to paint my exhaust system with a high temp paint.
    It is easy to make a small fortune in Hot Rods. Just start with a large one.......

  8. #23
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    Most of the commentary here has been useful for you, and your research is okay, but as Mike said, computer recreations don't always transfer to the real world. After years of playing with this stuff I've come to the conclusion that no matter what you think it will sound like when you're done, you'll maybe be close, but just about never right on (unless you're duplicating all conditions from a previous build).

    A couple examples for reference (short versions of stories I've told before).
    I picked up a '40 Ford coupe a number of years back. Had a built flathead, and a completely bare interior. Came with some old, short glass packs that were past their prime. Sounded awful, not loud, not tinny, just crappy. The long term plan was to do the exhaust last and fine tune for the desired sound. After putting in a well insulated interior the sound on the OUTSIDE of the car completely changed..............it was mellow, throaty, and just right to my ear (no change at all to the exhaust system). My belief is that the resonance off the floor pan was so dampened by the insulation and carpet that it removed the objectionable sound waves.

    In a '64 Savoy SS clone I did I had a mildly pumped 440. I put a pair of Flowmaster 40s on it. Now usually those will be loudish and have that tinny sound others here have noted. When we put an H pipe in all that went away, no harshness of any kind. To this day, despite a boat load of cars owned, I still remember that as the sweetest sounding car I've ever done. BTW, that one was 2 1/2", but that was more for the engine breathing than sound.

    Don't be surprised if when you're "done". you're not. If you're obsessive about the sound you may have to do some changes to dial it in. Sounds like you're not afraid of research and learning. If anyone, me included, tells you that X brand is the best sounding equipment keep in mind that is insufficient info. Environment/design have a hand in it too.
    34_40, 40FordDeluxe and mprevo like this.
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  9. #24
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    Quote Originally Posted by mprevo View Post
    I have been looking at the exhaust pipe I can buy. Does anyone know the difference between the Speedway pipe which is "Mild Steel" non-aluminized and the Jegs pipe which is called off as aluminized? Both are 16 gauge.

    Basically I need to know what "aluminized" means. When I am all done my goal is to paint my exhaust system with a high temp paint.
    Aluminized steel pipe has been hot-dip coated on both sides with aluminium-silicon alloy. It makes it more rust resistant. I used it for my exhaust pipes. I roughed up the surfaces of my pipes and mufflers with scotchbrite and painted it all with Eastwood exhaust paint. It has held up rather well over the years.
    Last edited by rumrumm; 12-01-2016 at 06:41 AM.
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  10. #25
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    After years of different approaches----------I believe the best way to have the sound you want is to put on a set up that is VERY quiet and then a high ampereage sterio system with 2 big speakers under the rear ( maybe floor of trunk) and a volume control that is hooked/programmed to your throttle pedal/rpm tach and just play a recording of the sound you want-------that way you can also change the sound easily------

    I know one guy who has spent well over $7000 on exhaust systems for his 2002 Camaro SS--------

    Aluminized steel tubing is coated so it won't rust out so bad but is still weldable----------stay aware that ordering tubing to be shipped can be high dollar because of the length of package .

  11. #26
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    And note that the aluminized coating must be ground away in the areas you intend to weld on.

  12. #27
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    OK that all makes sense and I appreciate all of the input from everyone. I understand how everything little thing can affect the final sound. I guess I am OK with this since I don't really have any other choice. I am also confident that when I finally get this project completed I will be happy. To be honest everything I have been listening too sounds good. Besides if it is that bad in the end it can always be changed. One never really 100% finishes a Hot Rod do they? There always something to do or make better.........


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  13. #28
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    Just one more thing I would like to mention. Many people say this does not matter, but, I did find that if you run dual exhaust, if you put the mufflers on, start it, and listen to each side... Then, remove them, switch sides, and listen, due to what ever, the sound will actually be a little different...

  14. #29
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    Quote Originally Posted by mprevo View Post
    I have been looking at the exhaust pipe I can buy. Does anyone know the difference between the Speedway pipe which is "Mild Steel" non-aluminized and the Jegs pipe which is called off as aluminized? Both are 16 gauge.

    Basically I need to know what "aluminized" means. When I am all done my goal is to paint my exhaust system with a high temp paint.
    Here is where I got my Pipe (you might look to see how it compares on Price)-
    https://www.mandrel-bends.com/catalog/images/Bends.JPG
    34_40 and mprevo like this.
    Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac?
    -George Carlin

  15. #30
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    Quote Originally Posted by 35WINDOW View Post
    Here is where I got my Pipe (you might look to see how it compares on Price)-
    https://www.mandrel-bends.com/catalog/images/Bends.JPG
    I used some of their parts as well! Good stuff.
    35WINDOW likes this.

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