Free flow - Pajero 3.2 Di-D




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  1. #1
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    Default Free flow - Pajero 3.2 Di-D

    Removed the center silencer box on my Pajero last month but just put a straight pipe in.

    It was a bit loud and raspy so today I took the pipe out and put a free flow silencer in.

    Now that the noise isn't taking my attention I can report that it makes a difference in performance and pulls better now and with the free flow silencer it sounds almost identical to the big box it had before.

    Recommended? Yes! Definitely!

  2. #2
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    My Austin 1100 had a freeflow (and twin SU's)- sounded wonderfull.

    Had a freeflow fitted to my 3.0V6 Sani in '91 - could clearly feel the revs "open" up, but the noise was too intrusive and had it removed the next day and normal silencer fitted.

    Wonder what the old MIVEC will do with a freeflow?

  3. #3
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    the puff of smoke is due to the engine being cold and my glowplugs are past it's time (note how easy it still starts though). My catalytic converter is also removed.

    I only revved to about 2700rpm so the turbo hardly spools up to boost pressure if just blipping the throttle like this while stationary.

    It sounds louder on the video than what it really is and it's hardly audible at cruising speeds.

    Interesting that the mic picks up the turbo whistle but my ears didn't. You will notice how quickly the turbo slows down, so idling down is for cooling the turbo, not for slowing it down as some proclaim.

    Sent via iPad & Forum Runner

  4. #4
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    Definitely planning on doing a freeflow on the LWB once I get it back from Mitspro.. Hopefully should give decent throttle response on the old 2.8Tdi as well
    IFS is like a swambo, soft, sexy and expensive!

    Apparently I need to make the airplane noises like mommy does when I try to spoon feed you the info..

  5. #5
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    Quote Originally Posted by pblaauw
    Definitely planning on doing a freeflow on the LWB once I get it back from Mitspro.. Hopefully should give decent throttle response on the old 2.8Tdi as well
    It will help but the 2 valves per cylinder is the biggest flow restriction on the 4m40 and that can't be changed.

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  6. #6
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    Quote Originally Posted by MariusFourie View Post
    It will help but the 2 valves per cylinder is the biggest flow restriction on the 4m40 and that can't be changed.
    Indeed, but in a year or 3 the 4m40 will have failed and I will have found a 4M41 somewhere
    IFS is like a swambo, soft, sexy and expensive!

    Apparently I need to make the airplane noises like mommy does when I try to spoon feed you the info..

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    Quote Originally Posted by pblaauw
    Indeed, but in a year or 3 the 4m40 will have failed and I will have found a 4M41 somewhere
    ...... In a gen3 body?

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    Gen 2.5 (blister) model.. Check my signature..
    IFS is like a swambo, soft, sexy and expensive!

    Apparently I need to make the airplane noises like mommy does when I try to spoon feed you the info..

  9. #9
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    Quote Originally Posted by pblaauw
    Gen 2.5 (blister) model.. Check my signature..
    Are you sure you want to transplant? At the cost of a transplant it's usually cheaper to sell and buy a gen3.

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    Quote Originally Posted by MariusFourie View Post
    Are you sure you want to transplant? At the cost of a transplant it's usually cheaper to sell and buy a gen3.
    I like the 2.5 shape, and I'm aware of the 4m41 costs.. I did pick the 2.5 up for not a lot of money anyway, and what does the 50 or 60k spent on a transplant get you? Barely a deposit on a Gen 4. Personally (guys please don't take it as a insult) I'm not a huge fan of the 3's and 4's, for that money I would rather buy a Rubicon..
    IFS is like a swambo, soft, sexy and expensive!

    Apparently I need to make the airplane noises like mommy does when I try to spoon feed you the info..

  11. #11
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    the 4M40 a nice motor, on mine had a bigger tmic and a free-flow with ported outlet mani. Was still problem free when I let it go at 240 000km.
    "Meerkat"
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  12. #12
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    Quote Originally Posted by AboutAfrica View Post
    the 4M40 a nice motor, on mine had a bigger tmic and a free-flow with ported outlet mani. Was still problem free when I let it go at 240 000km.
    The Colt Clubcab I have has 218 000km now and has not given me any hassles. Then again, it gets new oil and filter every 7500km, and a service every 15 000km
    IFS is like a swambo, soft, sexy and expensive!

    Apparently I need to make the airplane noises like mommy does when I try to spoon feed you the info..

  13. #13
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    Quote Originally Posted by pblaauw
    The Colt Clubcab I have has 218 000km now and has not given me any hassles. Then again, it gets new oil and filter every 7500km, and a service every 15 000km
    I doubt it will fail soon then.......

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    I have the 3.8 V6 auto and mine has a freeflow system on and its sounds great when standing and even short drives, but oh boy, it does get on your nerves over longer distances even more so with frequent gear changes.

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    Quote Originally Posted by Inkanyamba View Post
    I have the 3.8 V6 auto and mine has a freeflow system on and its sounds great when standing and even short drives, but oh boy, it does get on your nerves over longer distances even more so with frequent gear changes.
    Ah hah,

    The truth will out.

    My P38 4.6 V8. Fancy ceramic coated branches, big bore freeflow.

    Sounds awesome -

    For the first 5km.

    After 100km I am too scared to accellerate or change down for fear of losing it and killing someone.
    Cheers

    ZS5KAD Yeasu Ft-897D
    2 V8's a V6 and an inline 4
    The nice thing about going the extra mile - the road is never congested.

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    Quote Originally Posted by Inkanyamba View Post
    I have the 3.8 V6 auto and mine has a freeflow system on and its sounds great when standing and even short drives, but oh boy, it does get on your nerves over longer distances even more so with frequent gear changes.
    I have the 3.5 V6 with branches(uncoated) and free flow... the drone at 120kph is maddening!!! But sounds awesome at pull away and idle/startup

  17. #17
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    Well, that answers my MIVEC question. That droning is the reason why I had the system removed from my Sani after one day

    Marius,
    I suppose the diesel is so noisy, some extra droning won't really be noticed

  18. #18
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    a properly built free-flow does not have to be noisy. On the paj she is quite loud on acceleration, rumbling at low revs but at cruising revs its fine.
    "Meerkat"
    Namboyz (a made up story to scare grown-up children)
    Slightly Modded 03' V8 Disco

  19. #19
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    the diesel has a turbo that smoothes the combustion impulses and acts as silencer. at cruising speed i dont hear the engine unless i plant my right foot

  20. #20
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    turbo that smoothes the combustion impulses and acts as silencer
    True, I recall how quiet the F1 Renault sounded when they pioneered turbo F1 motors. They were blindingly fast, but oh so boring on the ear

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