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Differences between 21V and 85E head casting

  • HarvesterUT
    HarvesterUT
    Member
    • 74

    Differences between 21V and 85E head casting

    Both were used on the W-series 3.0L motors, but I've never found any info that describes the differences between the two head castings other than the 21V being the early W-series head and the 85E being used on later vg30's.
    1988 300ZX Turbo Shiro Special
  • midian
    midian
    Senior Member
    • 421

    #2
    find description of owo heads. info about 21v and e85 described fully there.
    Z31 JDM my way_google translated
  • 707Redz31
    707Redz31
    Senior Member
    • 375

    #3
  • 88sinZ
    88sinZ
    Senior Member
    • 2019

    #4
    There's no major differences that would set them apart.

    If you're running a W-series engine it's beneficial to use the OWO heads given the opportunity.
  • nismopu
    nismopu
    Administrator
    • 2221

    #5
    85e and OWO are the same port shapes the only difference on the OWO are the 10mm exhaust studs.
    "Its the s12's sexy over weight step daughter, the z31"