Survey by Qualaroo
+ Reply to Thread
Results 1 to 12 of 12

Thread: How to: FREE-FLOW Exhaust without LOUDNESS ?

  1. #1
    PakWheeler Follow
    fuma's Avatar
    Join Date
    Dec 2007
    Location
    Karachi
    Age
    32
    Posts
    231
    Follows
    0
    Following
    0
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Question How to: FREE-FLOW Exhaust without LOUDNESS ?

    How to MAKE a FREE-FLOW Exhaust without GAINING much LOUDNESS.

    *FREE FLOW means:
    No Catalytic converter
    No Resonator
    No Muffler
    No Flex Pipes
    Vehicle History: Pajero 1 & 2 (4d55 Non-Turbo - 4d56 Turbo & 4M40 I-C Turbo) / Land Cruiser BJ60(13B-T Turbo) / Nissan Patrol GQ(Td422 Non-Turbo)

  2. #2
    Site Banned Follow
    pak786's Avatar
    Join Date
    Sep 2008
    Location
    Lahore
    Posts
    884
    Follows
    0
    Following
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    this is the stuff that prevents noise

  3. #3
    PakWheeler Follow
    fuma's Avatar
    Join Date
    Dec 2007
    Location
    Karachi
    Age
    32
    Posts
    231
    Follows
    0
    Following
    0
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    Quote Originally Posted by pak786 View Post
    this is the stuff that prevents noise
    by saying " FREE FLOW " i don't mean " SMOOTH FLOW "

    here i mean a STRAIGHT PIPE direct from EXHAUST MANIFOLD
    No BEND, No CURVES, Nothing in between
    Straight-CUT Input to Output! No process in between.
    Vehicle History: Pajero 1 & 2 (4d55 Non-Turbo - 4d56 Turbo & 4M40 I-C Turbo) / Land Cruiser BJ60(13B-T Turbo) / Nissan Patrol GQ(Td422 Non-Turbo)

  4. #4
    Site Banned Follow
    pak786's Avatar
    Join Date
    Sep 2008
    Location
    Lahore
    Posts
    884
    Follows
    0
    Following
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    Yes and that will make noise , i have that in one of my cars and its so noisy i cant use it daily. Neighbours complain too.

    And i havent even removed the cat only muffler

  5. #5
    PakWheeler Follow
    fuma's Avatar
    Join Date
    Dec 2007
    Location
    Karachi
    Age
    32
    Posts
    231
    Follows
    0
    Following
    0
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    Quote Originally Posted by pak786 View Post
    Yes and that will make noise , i have that in one of my cars and its so noisy i cant use it daily. Neighbours complain too.

    And i havent even removed the cat only muffler

    But HOW to KILL that NOISE ?
    is there any method ?
    Vehicle History: Pajero 1 & 2 (4d55 Non-Turbo - 4d56 Turbo & 4M40 I-C Turbo) / Land Cruiser BJ60(13B-T Turbo) / Nissan Patrol GQ(Td422 Non-Turbo)

  6. #6
    Site Banned Follow
    pak786's Avatar
    Join Date
    Sep 2008
    Location
    Lahore
    Posts
    884
    Follows
    0
    Following
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    Only way to kill that is with a muffler , but again that beats the purpose of a free flow exhaust

  7. #7
    Senior PakWheeler Follow
    hash4u's Avatar
    Join Date
    May 2005
    Location
    Islamabad
    Age
    38
    Posts
    24,380
    Follows
    18
    Following
    0
    Mentioned
    406 Post(s)
    Tagged
    13 Thread(s)
    Problems Posted
    0
    Problems Solved
    4
    Best Answers
    3
    Good Answers
    13

    Default

    without resonator and muffler
    not possible
    Life is short and very unpredictable just like a Quarter mile .....

  8. #8
    Senior PakWheeler Follow
    Ghuncha's Avatar
    Join Date
    Aug 2005
    Location
    Islamabad
    Age
    35
    Posts
    5,967
    Follows
    2
    Following
    0
    Mentioned
    19 Post(s)
    Tagged
    1 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    -put a turbo, it will dampen the noise as a by product

    -use a couple of straight through mufflers, increase the diameter of the pipe though it will reduce the scavenging effect and shift the torque bend up the revs generally speaking.
    its all about power to weight ratio...

  9. #9
    PakWheeler Follow
    fuma's Avatar
    Join Date
    Dec 2007
    Location
    Karachi
    Age
    32
    Posts
    231
    Follows
    0
    Following
    0
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    @ Ghuncha

    Exhaust driven Turbocharger is installed already, it makes a difference in exhaust sound but not that much with straight pipe.
    Large diameter increases DEEP Low Frequency BASS, very annoying on streets & people feel shaking+nearby cars , also Turbo Whistle is too loud n clear in straight pipe, looks like a pressure cooker OR a steam engine at MAX boilin' point LOLZ
    Vehicle History: Pajero 1 & 2 (4d55 Non-Turbo - 4d56 Turbo & 4M40 I-C Turbo) / Land Cruiser BJ60(13B-T Turbo) / Nissan Patrol GQ(Td422 Non-Turbo)

  10. #10
    PakWheeler Follow
    Charged's Avatar
    Join Date
    Apr 2006
    Location
    Islamabad
    Posts
    591
    Follows
    0
    Following
    0
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    The bass you are talking about is called resonance, go for a smaller diameter like 2 inches if your running 2.5 and 1.5 if you are running 2'', and also a thicker gauge of the pipe like 14 from 16 and so on.
    There ain't no mud deep enough and no mountain high enough when you've got a LAND ROVER

  11. #11
    PakWheeler Follow
    fuma's Avatar
    Join Date
    Dec 2007
    Location
    Karachi
    Age
    32
    Posts
    231
    Follows
    0
    Following
    0
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    Quote Originally Posted by Charged View Post
    The bass you are talking about is called resonance, go for a smaller diameter like 2 inches if your running 2.5 and 1.5 if you are running 2'', and also a thicker gauge of the pipe like 14 from 16 and so on.
    @Charged

    bro, small diameter is too CRISPY LOUD!! Mid/High-Frequency is increased alot!
    instead of this, large diameter is still alot better where Low-Frequency is increased & Mid/High is decreased.
    Vehicle History: Pajero 1 & 2 (4d55 Non-Turbo - 4d56 Turbo & 4M40 I-C Turbo) / Land Cruiser BJ60(13B-T Turbo) / Nissan Patrol GQ(Td422 Non-Turbo)

  12. #12
    PakWheeler Follow
    Charged's Avatar
    Join Date
    Apr 2006
    Location
    Islamabad
    Posts
    591
    Follows
    0
    Following
    0
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    Yeah thats true... then you should add a free flow muffler, not one of of those Chinese ones available left right center...go for Magna flow, Borla and the like.
    Alternatively, you can study whats inside a free flow muffler and get one made yourself... its no rocket science.
    There ain't no mud deep enough and no mountain high enough when you've got a LAND ROVER

+ Reply to Thread

User Tag List

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •