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Thread: Expected cruising boost

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    Question Expected cruising boost

    DDi 3.0 (not common rail)
    Does anyone know the expected unmodified boost pressure when cruising around 90 - 100 km/hr.
    Alternatively, what pressures are you experiencing??
    Seems I get between 9 and 12 psi without much throttle.
    Checking small stuff as I have a brand new rebuild to run in.
    GU IV 2006; 3.0 DDi ST-S; Nissan Snorkel, Bull Bar and Tow Bar; Warn 8,000# Winch with Dyneema rope; Auber EGT, Boost and dual Battery gauges; Dawes @ 16psi; Provent 200; Dual Batteries; Three Dogs recovery points; Rear Springs +20% load; Outback drawers and Cargo Barrier; UHF; [GPS, Radio, CD, Bluetooth, SD, USB] floor extension; Alloy roof rack
    "Smart people know what they don't know"

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    Legendary 4bye4's Avatar
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    I have the same motor with dawes and I get about that reading. long haul at 100k sits on 10psi when crusing, so 9 to 12 sound about right. I limit it at 15psi but you really have to put the boot in to get it over 12 or so. Hope that helps. Cheers Tony
    2005 GU IV ST 3.0. Snorkel. Roof rack. Awning. Spots. Welded I/C. Dual batteries & VSR. UHF. Barn door hinge extension. Roof top spot lights. Rear drawers. 2" lift. NADS. EGT and boost gauges. Trans temp and water temp gauges. Provent 200 catch can. Rear ladder


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    Dr Gary (15th May 2019)

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    Patrol Freak Mc4by's Avatar
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    10 @ 100 on the highway.
    16 max.
    As I lay there looking up, taking in the spectacular view that was the night sky and the multitude of stars I asked myself, where did my tent go?

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    Patrol God threedogs's Avatar
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    X2 10psi @ 100kph is the norm what are you driving manual or auto
    as that will be different revs at 100 kph
    04 ST 3lt auto, not enough Mods to keep me happy, but getting there

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    Dr Gary (15th May 2019)

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    So with the knowledgeable responses I am satisfied that I have it about right. Thanks to all.
    GU IV 2006; 3.0 DDi ST-S; Nissan Snorkel, Bull Bar and Tow Bar; Warn 8,000# Winch with Dyneema rope; Auber EGT, Boost and dual Battery gauges; Dawes @ 16psi; Provent 200; Dual Batteries; Three Dogs recovery points; Rear Springs +20% load; Outback drawers and Cargo Barrier; UHF; [GPS, Radio, CD, Bluetooth, SD, USB] floor extension; Alloy roof rack
    "Smart people know what they don't know"

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