What if it is NOT exhaust drone? Then what?

Discussion in 'Technical' started by scooper77515, Nov 21, 2012.

Page 2 of 2
  1. Jsarnold

    Jsarnold Senior Member

    Joined:
    Oct 29, 2008
    Messages:
    2,842
    Likes Received:
    4
    Trophy Points:
    102
    Location:
    Raleigh, North Carolina
    Vehicle:
    '72 Sprint
    I first replaced the Magnaflows with Thrush turbos. The drone was better but still annoying. Then 12" glasspack blanks, installed on either side of the fuel tank, were added to the Thrush Turbos. I really like it now and get lots of compliments on the sound.
     
    Jsarnold, Nov 22, 2012
    #16
  2. blugene

    blugene Senior member Supporting Member

    Joined:
    Jul 25, 2004
    Messages:
    10,764
    Likes Received:
    76
    Trophy Points:
    283
    Garage:
    1
    Location:
    Marietta, OK
    Vehicle:
    73 Comet GT, 72 Comet GT, 2008 "Comet" (our boxer, who is now in the galaxies)
    All this makes me wonder if anyone has done just pipes out the back..
     
    blugene, Nov 22, 2012
    #17
  3. darren

    darren Member

    Joined:
    Jan 5, 2009
    Messages:
    4,852
    Likes Received:
    45
    Trophy Points:
    113
    Location:
    East of Dave
    Vehicle:
    72 302 Maverick
    LIke I said way back in the old thread. My car is identicle to this Scoop. Difference is I know its just the mufflers/exhaust. I live with it cause I love the sound from outside the car. From inside it gets a bit much around 2500 RPM. If I drove it more I would change it. You could prove its the exhaust really fast without spending all this time and money.You need one of these. http://www.treysit.com/16.html Sirometer. Figure out your exhasut frequency at 2500 RPM. I bet the Sirometer will match your exhaust frequency on a roadtest.

    Read this as a quick link I found. All kinds of crazy info to send you into a tail spin.LOL.
    http://www.fordtechservice.dealerconnection.com/vdirs/training/cdatabase/files/30S03T0.pdf
     
    darren, Nov 22, 2012
    #18
  4. darren

    darren Member

    Joined:
    Jan 5, 2009
    Messages:
    4,852
    Likes Received:
    45
    Trophy Points:
    113
    Location:
    East of Dave
    Vehicle:
    72 302 Maverick
    I think your exhaust is around 166hz at 2500 RPM. Quick calculation but you can verify.
     
    darren, Nov 22, 2012
    #19
  5. junrai

    junrai Member

    Joined:
    Dec 26, 2011
    Messages:
    2,516
    Likes Received:
    196
    Trophy Points:
    183
    Location:
    rancho cordova ca
    Vehicle:
    1972 mercury comet 1972 comet gt
    I hate magnaflow mufflers. I paid $200 to put som eone my car and took them off the next day went and bought headers instead. I love the ROAR of the open headers but people two blocks away hear my car when it starts. I had some long cherry bombs laying around so I put them on to see how it sounds. it sounds great except it seems like its putting alot of back pressure on the motor. maybe its just me I dont know. but theyll do for now. once the car is complete Ill take it and have it all checked out.
     
    junrai, Nov 22, 2012
    #20
  6. starsky74

    starsky74 Technician

    Joined:
    Mar 9, 2007
    Messages:
    904
    Likes Received:
    3
    Trophy Points:
    107
    Location:
    Hackberry Louisiana
    Vehicle:
    73 four door, 74 starsky&hutch mav, a 93SHO, an 03 gt, and a 94 gt
    Hahahaha there are diagrams for electrical issues, also consistent tests that usually lead to a result. Working for a dealership I'd rather an electrical concern over a wind noise/rattle/pop/creak anytime lol
     
    starsky74, Nov 22, 2012
    #21
  7. 71gold

    71gold Frank Cooper Supporting Member

    Joined:
    Apr 9, 2002
    Messages:
    26,576
    Likes Received:
    2,928
    Trophy Points:
    978
    Garage:
    1
    Location:
    MACON,GA.
    Vehicle:
    '73 Grabber
    ...:hmmm:...and how does this work...:huh:
     
    71gold, Nov 22, 2012
    #22
  8. Matterick

    Matterick Matt Somerville

    Joined:
    May 12, 2007
    Messages:
    3,931
    Likes Received:
    47
    Trophy Points:
    123
    Location:
    Lake Stevens WA
    Vehicle:
    1973 Maverick 302, 1971 Maverick
    It's an odd concept, but I've always found tailpipes out the back to dramatically reduce drone......... (sarcasm)
     
    Matterick, Nov 22, 2012
    #23
  9. darren

    darren Member

    Joined:
    Jan 5, 2009
    Messages:
    4,852
    Likes Received:
    45
    Trophy Points:
    113
    Location:
    East of Dave
    Vehicle:
    72 302 Maverick
    You start your car. You exit your car. You listen with your ears.
    You can also drive with the window placed in the down position. Preferably past a row of imports, and smile as the car alarms wail.
    You could place a large object on the right pedal. Then jump from said vehicle and listen. :rolleyes:
     
    darren, Nov 23, 2012
    #24
  10. 71gold

    71gold Frank Cooper Supporting Member

    Joined:
    Apr 9, 2002
    Messages:
    26,576
    Likes Received:
    2,928
    Trophy Points:
    978
    Garage:
    1
    Location:
    MACON,GA.
    Vehicle:
    '73 Grabber
    I like the sound of my exhaust system with the windows down but it's not the same sound that someone would hear if you drive past them...
    I asked Jeff once to swap cars with me, he drove my car and I drove his. I drove beside and behind it so I could hear what everyone was hearing...:thumbs2:
     
    71gold, Nov 23, 2012
    #25
  11. darren

    darren Member

    Joined:
    Jan 5, 2009
    Messages:
    4,852
    Likes Received:
    45
    Trophy Points:
    113
    Location:
    East of Dave
    Vehicle:
    72 302 Maverick

    LOL. I did the same. Swapped into a quiet car and followed mine for a while. (y)
     
    darren, Nov 23, 2012
    #26
Page 2 of 2

Share This Page