Bottom end...

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  • Suspence
    E30 Modder
    • Jul 2009
    • 943

    #1

    Bottom end...

    I rebuilt the top end properly ( HD Rockers, Valve guides, Machine work, 272 Cam ) but now my bottom end...........

    Not sure what you would recommend but anything big that I should take care of before I turbo my car?
  • SkiFree
    R3VLimited
    • Jun 2011
    • 2766

    #2
    an oil pump baffle and windage tray might be a good place to start.

    What is the intended use of the engine? Track only, Daily, weekend warrior, etc.

    What size turbo, psi?
    ADAMS Autosport

    Comment

    • Suspence
      E30 Modder
      • Jul 2009
      • 943

      #3
      Daily driver, probably get a boost controller for track days. Track it probably once a month, probably less. Prob around 10-15PSI, just wanted to double check on things to do before turbo.

      Comment

      • MR 325
        Moderator
        • Oct 2003
        • 37827

        #4
        Is there anything wrong with your bottom end? Burn oil? If it's running good there's really no need to touch it. If you wanted to be safe you could always crack one of the rod caps and check the bearings. Smartest one to check is furthest from the oil pump.

        A crank scraper is always nice for a turbo motor. I've got one in mine.
        BimmerHeads
        Classic BMW Specialists
        Santa Clarita, CA

        www.BimmerHeads.com

        Comment

        • acolella76
          R3VLimited
          • Apr 2010
          • 2950

          #5
          I wouldn't really touch the bottom end unless you were going to go balls out for 350+ hp. Or if you felt like taking the engine apart again use an MLS gasket
          -Alex

          Comment

          • SkiFree
            R3VLimited
            • Jun 2011
            • 2766

            #6
            Given your parameters a crankscraper aka windage tray would provide some good piece of mind for those longer track day corners.

            As pointed out by mr 325 already.
            ADAMS Autosport

            Comment

            • SkiFree
              R3VLimited
              • Jun 2011
              • 2766

              #7
              EDIT stupid double post
              ADAMS Autosport

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