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Thread: Sump Design

  1. #1
    Slowly getting there... drunkenmaster's Avatar
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    Default Sump Design

    Guys,

    I need an experienced opinion on this sump for my conversion, it looks a bit rough to me but then again, I am hardly experienced in the ways of the sump.

    Thanks
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    James

    http://www.classiczcars.com/forums/showthread.php?t=11123

  2. #2
    philo "Z" opher Zedrally's Avatar
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    Default

    What conversion is that?
    Mike of the Mire

    73 240Z Rally
    77 260Z Touring

    Bogged but not beaten

  3. #3
    Registered User zr240's Avatar
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    Default

    that sump looks ok to me? whats the prob?

    Ash
    Ashley
    73 240Z Race car (nearly finished)
    71 240Z road car (nearly started!)

  4. #4
    Registered User panchovisa's Avatar
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    Default

    Drunkenmaster,
    It looks fine, except for the shallow area. Your crank will be wipping up an oil foam.

    The shallow area should be filled with slots that will take the oil to lower level away from crank. On the "downwind" side of the slots should be a "wiper" (raised sheet metal blade angled to catch spray off crank and direct it to lower level of pan through slots and then to deep sump). This is usually called a windage tray.

    See if the maker is interested in doing it right, if not I'd pass because you'll have more oil control problems (lost HP and reliabilaty) than the larger capacity will cure. Sorry, but you asked.

    Any racers care to add anything I didn't mention?
    If you want it done right then do it yourself.

  5. #5
    Slowly getting there... drunkenmaster's Avatar
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    Default

    After seeing those photos the guy who built my engine wants to build the sump for me, pictured below.

    What do you guys think.
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    James

    http://www.classiczcars.com/forums/showthread.php?t=11123

  6. #6
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    Default

    in my non-professional opinion just what i read online or in books the second design is far better as panchovisa was saying you don't want the crank to whip up the oil as the oil turns to a creamy like substance and stops acting like oil should.

    This one allows for oil to drain to the bottom but also has a tray to ensure that there is some oil to be sucked up by the pump.

    www.240z.id.au he has a sump design which i like even if it is a L28 Turbo it's still the same concepts.

  7. #7
    Registered User panchovisa's Avatar
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    drunkenmaster,
    The second design has the windage tray design I was talking about. The first design could be redesigned to also incorporate it, if the builder cares too.

    Most people don't know that a proper sump can free up horsepower lost by "drag" of the crank/rods trying to spin thru suspended oil mist in the crankcase.

    There are amazing aerodynamic forces in play, especially in stroker engines at high revs.
    If you want it done right then do it yourself.

  8. #8
    Registered User RB30-ZED's Avatar
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    Hi Drunkenmaster
    I love Sump number 2, where can i get it?
    Steven

  9. #9
    Slowly getting there... drunkenmaster's Avatar
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    New Zealand.

    I may bring one over so we can work something out if you are serious, I am still exploring local options.

    I never did get to see the photos of your sump from a while ago.
    James

    http://www.classiczcars.com/forums/showthread.php?t=11123

  10. #10
    Registered User RB30-ZED's Avatar
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    Im always serious
    Its my only worry as i hammer around a long corner watching the oil pressure gauge, waiting for it to suck up a gut full of air.
    It might never happen but id like a bigger capacity sump all the same.
    Sorry I don't have any good pics of the sump, but I used the front section of a RB30 powered Nissan Patrol 4WD, the centre of a VL Commodore and a shortened rear section from the VL, three sections and no leaks, just good luck I think.
    Steven

  11. #11
    Formerly Datto-Zed Murph's Avatar
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    drunkenmaster: What sort of $ are we talking for sump no.2?

  12. #12
    Slowly getting there... drunkenmaster's Avatar
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    Both are on the $500 mark.

    Sump 1: By CRS and you need to give an exchange sump.

    Sump 2: You need to pay shipping from NZ, which may not be too bad depending on customs. Shipping for my motor was very reasonable, 1/3rd of the customs price.
    James

    http://www.classiczcars.com/forums/showthread.php?t=11123

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