Jump to content

Forums/Z31P/z31-performance-upgrade-forums engine-mechanical-aa/Differences between 21V and 85E head casting

From Z31 Library
Revision as of 05:12, 15 May 2026 by z31p_HarvesterUT (talk | contribs) (Forum archive import (z31performance))
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

Imported from Z31Performance.com Forums{{#if:HarvesterUT| — original post by HarvesterUT}}{{#if:2014-11-17 16:16:35|, posted 2014-11-17 16:16:35}}{{#if:5| · 5 post{{#ifeq:5|1||s}}}}{{#if:/Z31performance_archive/forum/z31-performance-upgrade-forums/engine-mechanical-aa/24513-differences-between-21v-and-85e-head-casting.html|
Local archive: view archived thread on dev.z31library.com}}

HarvesterUT: (2014-11-17 16:16:35)

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.

midian: (2014-11-17 17:04:29)

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

707Redz31: (2015-01-13 19:41:54)

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

88sinZ: (2015-01-13 20:44:10)

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: (2015-01-13 22:31:28)

85e and OWO are the same port shapes the only difference on the OWO are the 10mm exhaust studs.

Retrieved from "https://dev.z31library.com/index.php?title=Forums/Z31P/z31-performance-upgrade-forums_engine-mechanical-aa/Differences_between_21V_and_85E_head_casting&oldid=5211"