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Technical Muffler Suggestions

Discussion in 'Traditional Hot Rods' started by James Mundstock, Jan 31, 2020.

  1. James Mundstock
    Joined: Jun 13, 2017
    Posts: 53

    James Mundstock

    I have a 47 Ford Coupe with a hot Flathead. It is a 286 cubic inch stroker with an Isky Max1 cam and three Stromberg 97's. It sounds great with open headers but I cant drive it very long. I was going to run straight pipes out the back but I am afraid it will be too obnoxious on a long trip. I searched for mufflers and the choices are overwhelming. I want stainless but does anyone have suggestion. I want the sound to turn heads but I don't want that drone in the interior. Thanks in advance for the responses.
     
  2. Jalopy Joker
    Joined: Sep 3, 2006
    Posts: 31,179

    Jalopy Joker
    Member

    subject covered a lot - maybe not foe your specific motor - search here & you tube for running motor sounds
     
  3. 302GMC
    Joined: Dec 15, 2005
    Posts: 7,856

    302GMC
    Member
    from Idaho

    22'' Porter steelpacks with 1 7/8'' tailpipes
     
  4. I have long glass packs w/ no tailpipes, just turnouts on my F-1 pickup. Love the sound, not to loud for me. Warmed over 8ba w/mild cam...
     

  5. chopolds
    Joined: Oct 22, 2001
    Posts: 6,208

    chopolds
    Member
    from howell, nj
    1. Kustom Painters

    Brockman Mellowtone mufflers. The only ones I run on my Kustoms. Available with glass, steel or no packing! Different lengths, too!
     
    Jay71, BoilermakerDave and Moriarity like this.
  6. RocktimusPryme
    Joined: Sep 22, 2013
    Posts: 198

    RocktimusPryme
    Member

    If you want to keep all your power Magnaflow. It’s a straight through design.
     
  7. Moriarity
    Joined: Apr 11, 2001
    Posts: 30,778

    Moriarity
    SUPER MODERATOR
    Staff Member

    here is a youtube on my 40 with porter steel pack mufflers

     
    302GMC, ekimneirbo and Desoto291Hemi like this.
  8. sunbeam
    Joined: Oct 22, 2010
    Posts: 6,213

    sunbeam
    Member

    I don't want to turn heads especially the men in blue. When I was a teenager it did not take me long to figure out quiet exaust meant less tickets and I don't mean just loud muffler tickets. On my Sunbeam I used cut outs when I wanted to hear it.
     
    Last edited: Feb 3, 2020
  9. Run the pipes out the back and you won't get the drone in the cab.
    Any muffler is going to drone some when you're running in resonance that is a specific RPM range that all vehicles have and the type of muffler don't make any difference.
    If you want it to sound like an old hot rod or custom then glass packs or steel packs are what you want. My Ol' Man preferred steel packs but I am from the next generation and I prefer glass packs.

    That is the easiest way to lay it out from where I sit.
     
    catdad49, 6sally6 and Moriarity like this.
  10. Mark,
    I’m kind of worried,,,,that was a lot of smoke when you revved the engine.
    Out of both banks even ! Lol,,,you know I’m kidding.

    Early cool morning steam,,,that Cadillac engine is really nice .
    You lucky dog !

    Tommy
     
  11. Moriarity
    Joined: Apr 11, 2001
    Posts: 30,778

    Moriarity
    SUPER MODERATOR
    Staff Member

    haha, yeah new mufflers are coated in oil to keep them from rusting until they are sold.... cleared right up in a few minutes
     
    Desoto291Hemi likes this.
  12. speedshifter
    Joined: Mar 3, 2008
    Posts: 312

    speedshifter
    Member

     
  13. speedshifter
    Joined: Mar 3, 2008
    Posts: 312

    speedshifter
    Member

    I too run Porter steel pacs As you know they use stretched & tack welded garage door springs for the cores. I .D. of the cores is only about 1 1/2". This could result in considerable flow restriction. I have heard later ones have a larger I.D. Greg
     
  14. Stooge
    Joined: Sep 9, 2015
    Posts: 504

    Stooge
    Member

    i used a pair of Porters, (I forget the length) on my last project, (off topic truck), and plan on using 1 for the current Buick straight 8 project. Really nice quality and a great sound without being too much, though the off topic truck they are on is on the louder side as the exhaust dumps under the truck bed. The buick will get complete exhaust to the bumper.
     
  15. cederholm
    Joined: May 6, 2006
    Posts: 1,748

    cederholm
    Member

    I'll be running Porters behind the flatty in my coupe. I have them on my spit Chevy straight 6 - love them.

    ~ Carl
     
  16. LUTHER99
    Joined: Aug 11, 2011
    Posts: 40

    LUTHER99
    Member

    no mufflers , straight pipe out the back !!
     
    Flathead Dave likes this.
  17. Blues4U
    Joined: Oct 1, 2015
    Posts: 7,589

    Blues4U
    Member
    from So Cal

    Say what?????
     
  18. Moriarity
    Joined: Apr 11, 2001
    Posts: 30,778

    Moriarity
    SUPER MODERATOR
    Staff Member

    yup, I was there when mine were made. I wanted mine packed with lathe shavings like the original ones instead of stainless steel wool like they do now. Clark told me if that is what you want, bring your own shavings and pack em yourself. So, I did
     
    -Brent-, catdad49 and 302GMC like this.
  19. Blue One
    Joined: Feb 6, 2010
    Posts: 11,459

    Blue One
    ALLIANCE MEMBER
    from Alberta

    Here's my RPU Y Block running through Porters with 2.5 " pipes.
    As you probably know it shares the flathead firing order.
     
    Moriarity likes this.
  20. Blues4U
    Joined: Oct 1, 2015
    Posts: 7,589

    Blues4U
    Member
    from So Cal

    Garage door springs as the core? I'm having a hard time imaging this.
     
  21. Blue One
    Joined: Feb 6, 2010
    Posts: 11,459

    Blue One
    ALLIANCE MEMBER
    from Alberta

    Like this.
    porter.jpg

    The garage door tension springs you see on the shaft above every roll up sectional garage door.
     
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  22. Blues4U
    Joined: Oct 1, 2015
    Posts: 7,589

    Blues4U
    Member
    from So Cal

    Seriously? I had no idea. Seems like a lot of unnecessary weight, and the labor to weld it slightly stretched. Why not perforated tubing like everyone else?
     
  23. Moriarity
    Joined: Apr 11, 2001
    Posts: 30,778

    Moriarity
    SUPER MODERATOR
    Staff Member

    because that is the way they have been making them since the 1930's. these mufflers are hand made and worth every penny they get for em
     
    -Brent- and Blue One like this.
  24. Elcohaulic
    Joined: Dec 27, 2017
    Posts: 2,212

    Elcohaulic

    They have the coolest sound. You have to hear the real thing.
     
    Blue One likes this.
  25. error404
    Joined: Dec 11, 2012
    Posts: 383

    error404
    Member
    from CA

    oh man, that does seem like it would be heavy. But if it's on a few hangers, I guess it doesn't matter.
     
    Blue One likes this.

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