90 Heads and IH's on our 91 - ZR-1 Net Registry Forums

Shrek · 01-04-2012

Based on photos in this thread http://www.zr1.net/forum/showthread....ighlight=valve The heads and IH's on my wife's Z are 1990 style.

sammy · 01-04-2012

did the previous owner have the inj housings and plenum ported?????

Shrek · 01-04-2012

Quote:

Originally Posted by sammy

did the previous owner have the inj housings and plenum ported?????

NOPE! She was a virgin when I cracked her open for injectors last year.

A26B · 01-04-2012

That's not particulary surprising, knowing the story behind the change. It was essentially a change to reduce machining and therefore cost. There was probably an inventory of engines already at BG when the change was implemented at Mercury.

01-04-2012	#1
Shrek Join Date: Sep 2010 Location: Currituck, NC Posts: 246	90 Heads and IH's on our 91 Based on photos in this thread http://www.zr1.net/forum/showthread....ighlight=valve The heads and IH's on my wife's Z are 1990 style.

01-04-2012	#2
sammy Join Date: Jun 2010 Location: Lone Pine, CA Posts: 580	Re: 90 Heads and IH's on our 91 did the previous owner have the inj housings and plenum ported?????

01-04-2012	#4
A26B Join Date: Dec 2003 Location: Arcadia, OK Posts: 3,402	Re: 90 Heads and IH's on our 91 That's not particulary surprising, knowing the story behind the change. It was essentially a change to reduce machining and therefore cost. There was probably an inventory of engines already at BG when the change was implemented at Mercury. __________________ Jerry Downey JERRYS LT5 GASKETS & PARTS http://www.jerrysgaskets.com 1994 *ZR-1*, Black/Black, Lingenfelter Aerobody, 416cu in, 3.91 gears, coil-over susp, Brembo brakes, etc. 2016 Black-Red, 3LT-Z51 Auto 8-speed.