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Technical Porter Vs smity's mufflers

Discussion in 'Traditional Customs' started by chasey32, Dec 6, 2016.

  1. falcongeorge
    Joined: Aug 26, 2010
    Posts: 18,341

    falcongeorge
    Member
    from BC

    I don't have anything against h-pipes per-se, I have one on my daily driver with full 3" exhaust, and it helps quiet it down a bit. My point is, it's counter-productive to getting a "period" sound.
     
    TCATTC likes this.
  2. dirty old man
    Joined: Feb 2, 2008
    Posts: 8,912

    dirty old man
    Member Emeritus

    Exactly my point also George. I get that on my roadster even tough it's an SBC engine, because I have an air gap manifold with no exhaust heat crossover passage.
     
  3. bchctybob
    Joined: Sep 18, 2011
    Posts: 3,617

    bchctybob
    ALLIANCE MEMBER

     
  4. dan31
    Joined: Jul 3, 2011
    Posts: 1,092

    dan31
    Member

    I put Smithys on my 54 but i think i used the long ones,they are not as loud or "rappy" sounding as i had hoped for.
     
  5. HUSSEY
    Joined: Feb 16, 2010
    Posts: 628

    HUSSEY
    Member

    30 in. Smithy's on my 52 Chevy, split exhaust, stock 216. I thought it had a nice tone but you couldn't hear it in the car. I would have liked a little bit of tone in the car.



     
  6. GlennDH
    Joined: Nov 24, 2012
    Posts: 2

    GlennDH
    Member
    from Texas

    I put a set of Brockman Mellow Tone glasspacks on my stock 54 Olds and within 2 weeks replaced them with 30" Smithy's. The Brockmans are very well built but are LOUD. The Smithy's have the exact mellow sound I was looking for. If I were 16 instead of 70 I would have preferred the Brockmans.
     
    Packrat likes this.
  7. Mt Mike
    Joined: Feb 24, 2021
    Posts: 9

    Mt Mike

    For my 440 six pac powered 1930 Model A coupe, I built my own from 3" s.s tubing and 4" s.s. outer shell, 30" long. They are packed with s.s. wool. The entire exhaust is all s.s. 3" tubing after the Sanderson block hugger headers. I really didn't find it that difficult to make the mufflers, but I'm a welder by trade which helps. The slash cut ends of the system extend a good 10" past the bumpers and I get plenty of rumble inside of the car. I'm not having any luck downloading my photos so I have to do some homework as I'm tech challenged!
     
  8. TCATTC
    Joined: Oct 12, 2019
    Posts: 283

    TCATTC
    Member

    Those louvers won't create enough back pressure for you to notice, perforated tube cores are usually louder.
     
  9. michaelvz51
    Joined: May 24, 2011
    Posts: 750

    michaelvz51
    Member
    from So Cal
    1. HAMB Merc Club

    I am running Brockman Mellow Tones with Echo cans on my SBC with corvette style exhaust manifolds and 2" tube all the way back.
     
    harpo1313, -Brent-, Blues4U and 3 others like this.
  10. speedshifter
    Joined: Mar 3, 2008
    Posts: 312

    speedshifter
    Member

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

    speedshifter
    Member

    I had a pair of Porters on my 324 Olds powered roadster. As you know Porters use a stretched garage door spring for a straight through core. The id of the core is 1 5/16", yet inlet & outlet is 2". Excessive back pressure might be the result. I replaced these with $22 glass packs from Speedway. They sound great. I feel using insulated hangers will reduce droning. An h pipe will reduce that lovely rumble. In 1958 my friend Craig had a 48 Ford rag top with twin pipes. We jerked off the intake & put pennies in the heat riser passages.Then we removed the mufflers, replaced them with flex pipe from the Coast to Coast store. Man it sounded cool! We were in the driveway revving it up, enjoying the results of our hi tech mods. Craigs high strung mother came running out of the house yelling " Craig, Don't you dare drive that thing that way". Craig replied " stand back mother we're blasting off". Craig backed out of the driveway, shoved it in low, tires squealing . Away we went, heading to the local drive inn to show off. Well we were a little deflated when the local fuzz followed us there and gave Craig a $10 ticket for no mufflers. It was great to be a teen ager in the 50's Greg
     
    Butler 32 and dirty old man like this.
  12. Moriarity
    Joined: Apr 11, 2001
    Posts: 23,042

    Moriarity
    SUPER MODERATOR
    Staff Member

    found this old video of my corvette after getting its 14" porters
     
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  13. Blues4U
    Joined: Oct 1, 2015
    Posts: 6,464

    Blues4U
    Member
    from So Cal

    What a bitchin car!
     
  14. michaelvz51
    Joined: May 24, 2011
    Posts: 750

    michaelvz51
    Member
    from So Cal
    1. HAMB Merc Club

    Thank you Blues4U!
     
    Blues4U likes this.
  15. abe lugo
    Joined: Nov 8, 2002
    Posts: 2,583

    abe lugo
    ALLIANCE MEMBER

    Last edited: Mar 6, 2021
  16. Jawsmon
    Joined: Dec 29, 2010
    Posts: 30

    Jawsmon
    Member

    Engine master just tested the H pipe against the Y pipe on the dyno. The Y pipe produced a significant increase in hp. The 90 deg. intersection of the H pipe produced turbulence and backpressure. Use an X pipe for dual exhaust so the itersection is 45 deg. angle. This produces the best scavaging and the least amount of backpressure.
     
  17. Von Brush
    Joined: Nov 20, 2016
    Posts: 105

    Von Brush
    Member
    from Corfu, NY

    I have 27" Smithy's on my 57 Chevy and l like the mellow sound. They are not raspy and are really deep sounding at cruise. If you get on it there is more of a rumble but not annoying. Back in the 60s l had Walker Contenentals on my 56 Ford . They were louder and rapped when you got on them. Now l prefer the mellow sound of the Smithy's. I have an H pipe on my 69 el Camino with turbo mufflers and find the pipe quiets the mufflers somewhat. I do not have the stock crossover pipe on the 57. I guess it is all a matter of taste and age as to what sound you are looking for.

    Sent from my 9024W using The H.A.M.B. mobile app
     
  18. COCONUTS
    Joined: May 5, 2015
    Posts: 1,105

    COCONUTS

    Whatever you decide on, just make sure that you can still pass state inspection.
     
  19. TCATTC
    Joined: Oct 12, 2019
    Posts: 283

    TCATTC
    Member

    And also the most Euro, un-traditional sound
     
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  20. LOWDUG37
    Joined: Jan 31, 2007
    Posts: 969

    LOWDUG37
    Member

    I have used Smithy's on flatheads,Y-block and SBC and liked the sound in all 3,I did however put Porter's on a recent build SBC and was disappointed, sounds like aV-6.
     
  21. 6sally6
    Joined: Feb 16, 2014
    Posts: 1,893

    6sally6
    Member

    What's worng with straight pipes all the way to the rear bumper? Low back pressure and the sound won't be bouncing up off the pavement. That lil mini SBF won't make a lot of racket anyway so it shouldn't be noisy at all!
    6sally6
     
  22. iafraser39
    Joined: Aug 2, 2009
    Posts: 172

    iafraser39
    Member
    from Warmland

    I'm running thrush glass packs behind my long tube headers.
    Its noisy and drones a lot. Looking for quieter ones.
     
  23. TCATTC
    Joined: Oct 12, 2019
    Posts: 283

    TCATTC
    Member

    Sounding good and noise are two different things...
     
    dirty old man likes this.
  24. michaelvz51
    Joined: May 24, 2011
    Posts: 750

    michaelvz51
    Member
    from So Cal
    1. HAMB Merc Club

    Try moving your glass packs as far to the rear of the car as possible
     
  25. -Brent-
    Joined: Nov 20, 2006
    Posts: 6,613

    -Brent-
    Member

    This seals it, my 327 is getting Porter's behind it!
     
    Moriarity likes this.
  26. Elcohaulic
    Joined: Dec 27, 2017
    Posts: 2,598

    Elcohaulic

    I tried them all. The ones I liked best they don't make anymore.. The one's that came in a heavy gauge steel can are not made anymore except for the Porter.. The Porters I bought were very well made but the needed the spring opened up more. I may be wrong but when the spring isn't open the sound couldn't get to the steel packing.. Also the ones with glass packing seem to sound better.

    The photo is an old Douglass Super Sport muffler. I had two sets of these and they sounded great.
     

    Attached Files:

  27. Mufflers are basically frequency filters. The glass cuts down high frequencies but is basically transparent to low frequencies, so you hear a low rumble (assuming the engine produces it to begin with). The steel wool doesn't do much of anything compared to what the glass does, so the exhaust will have more high frequency content and sound harsher. The best set up is to use a thin layer of stainless steel wool over the perf tube or spring or whatever, and pack the rest with glass. Then the stainless is only there to keep the glass from getting blown out.
     
    Blues4U likes this.
  28. 52lomofo
    Joined: Jan 29, 2005
    Posts: 723

    52lomofo

    You still got the merc?

    Sent from my SM-A520W using The H.A.M.B. mobile app
     
  29. 52lomofo
    Joined: Jan 29, 2005
    Posts: 723

    52lomofo

    Or you just posting video

    Sent from my SM-A520W using The H.A.M.B. mobile app
     
    Speed Gems likes this.
  30. Blues4U
    Joined: Oct 1, 2015
    Posts: 6,464

    Blues4U
    Member
    from So Cal

    I like reading your comments on exhaust/muffler topics, backed up with experience. Thanks.
     
    Elcohaulic likes this.

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