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Mandrel Bend vs Conventional Bend

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  • Mandrel Bend vs Conventional Bend

    Looking for real life factual comparison of any benefits of the mandrel vs conventional bend exhaust systems. Let's assume that the two systems are identical in diameter and have the identical muffler/resonators fitted. Can anyone point me to information where this comparison is done?

    I am really just trying to see whether there really is that much benefit to justify the hype and $$.

    Cheers
    Black 2003, TD, GXL Prado

  • #2
    Re: Mandrel Bend vs Conventional Bend

    Here is a good comparison .. http://www.bobsmuffler.com/muffler_myths.htm

    I doubt you would notice that much difference between a press bent and mandrel bent system, muffler flow may be noticable though.
    '98 Grande V6 - ARB Sahara bar, IPF HID spotties, ARB compressor, GME UHF, OME Sport suspension, 265/75 MT ATZ 4 Ribs, steel rock sliders, Safari snorkel, Tigerz11 winch, rear ARB locker, Rhino platform rack.

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    • #3
      Re: Mandrel Bend vs Conventional Bend

      A qoute from julian Edgar written in "Zoom" magazine after flow testing mandrel and press bends, this is the summary to that article:

      The flow capacity of a mandrel bend is always superior to a bend that's press formed - however, the extra flow of the mandrel bend varies depending on the angle of the bend. Flow bench testing has shown that a good quality 45-degree press bend (one that isn't overly squashed) flows only around one percent worse than an equivalent mandrel bend. Once the bend is tighter, however, the mandrel pipe's advantage grows - across a 90-degree bend, the airflow of the press bend trails by 2.5 percent and a across a 120-degree bend it's down by nearly 4 percent
      Mick
      [CENTER][B][I][SIZE=1][COLOR=blue]1KZ-TE Turbo Diesel, 5 speed manual, 3.5 inch lift, 265/70/17 Mickey Thompson MTZ, D-Tronic chip, Boost controller, mandrel exhaust, dump pipe, modified intake, ARB steel bar, Magnum winch, Safari snorkel, rear drawers, half cargo barrier, dual batteries, Uniden UHF, Sat Nav, reverse camera, Magellan XL , Tjm bash plates, ARB alloy roof rack, rear telescopic work light and numerous other modifications!!!
      Now with 3BAR MAP sensor & 18PSI Boost![/COLOR][/SIZE][/I][/B][/CENTER]

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