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    Turbo Oil & Water Plumbing

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    Rick Ears

    Posts : 145
    Join date : 2009-02-25

    Turbo Oil & Water Plumbing

    Post  Rick Ears on Sun Mar 01, 2009 4:01 pm

    The intake and exhaust plumbing often receives the focus leaving the oil and water plumbing neglected.
    Garrett
    ball bearing turbochargers require less oil than journal bearing
    turbos. Therefore an oil inlet restrictor is recommended if you have
    oil pressure over about 60 psig. The oil outlet should be plumbed to
    the oil pan above the oil level (for wet sump systems). Since the oil
    drain is gravity fed, it is important that the oil outlet points
    downward, and that the drain tube does not become horizontal or go
    “uphill” at any point.
    Following a
    hot shutdown of a turbocharger, heat soak begins. This means that the
    heat in the head, exhaust manifold, and turbine housing finds it way to
    the turbo’s center housing, raising its temperature. These extreme
    temperatures in the center housing can result in oil coking.
    To
    minimize the effects of heat soak-back, water-cooled center housings
    were introduced. These use coolant from the engine to act as a heat
    sink after engine shutdown, preventing the oil from coking. The water
    lines utilize a thermal siphon effect to reduce the peak heat soak-back
    temperature after key-off. The layout of the pipes should minimize
    peaks and troughs with the (cool) water inlet on the low side. To help
    this along, it is advantageous to tilt the turbocharger about 25° about
    the axis of shaft rotation.

      Current date/time is Mon Dec 10, 2018 9:33 am