Differences between 21V and 85E head casting

HarvesterUT

Member

Posts: 74
#1

Differences between 21V and 85E head casting

11-17-2014, 11:16 AM

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

Senior Member

Posts: 421
#2

11-17-2014, 12:04 PM

find description of owo heads. info about 21v and e85 described fully there.

Z31 JDM my way_google translated
707Redz31

Senior Member

Posts: 375
#3

01-13-2015, 02:41 PM

This may help a bit. http://z31performance.com/showthread…=Cross+section
88sinZ

Senior Member

Posts: 2019
#4

01-13-2015, 03:44 PM

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

Administrator

Posts: 2221
#5

01-13-2015, 05:31 PM

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"