Differences between 21V and 85E head casting

  • #1

    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
  • #2
    find description of owo heads. info about 21v and e85 described fully there.
    Z31 JDM my way_google translated
  • #3
    This may help a bit. http://z31performance.com/showthread…=Cross+section
  • #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.
  • #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"