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Discussion Starter #1 (Edited)
With all the misinformation spread across the internet, this post is to clarify the misconceptions about “ZC” engines.

In earlier “Hybrid” years (1996-1997) many people were buying DOHC 1590cc engines stamped “ZC” from engine importers. These engines were popular upgrades for Civic/CRX chassis providing ~130ps with bolt in ease. This engine was called “THE ZC” for quite a number of years, and even today people still consider this twin cam the ONLY ZC. Engine importers received a variety of other engines stamped “ZC”. The “ZC” stamp alone cannot identify the engine’s designation. The only thing one can assume is that ALL engines stamped “ZC” displaces 1590cc. “ZC” stamped engines were offered with a number of design variations throughout the years of production.
Here’s a TIMELINE of the different “ZC” engines manufactured that I have noted thus far:

1984-1987
DOHC ZC MPFI 9.3 CR 135 ps / 6500 RPM ( Integra Gsi, Rsi, Civic / CRX Si)
http://www.honda.co.jp/HOT/ModelData/integra/qti-ka-502/gsi_sy.html
DOHC ZC Single CARB 9.3 CR 115 ps / 6500 RPM (Integra ZS, LS)
http://www.honda.co.jp/HOT/ModelData/integra/qti-ka-502/zs_sy.html
DOHC ZC MPFI 9.3 CR 120 ps / 6500 RPM (4dr Integra Gsi)
http://www.honda.co.jp/HOT/ModelData/integra/7qti4-ka-610/gsi_sy.html
DOHC ZC SINGLE CARB 9.3 CR 100 ps / 6500RPM (4dr Integra & hatch GS, ZS)
http://www.honda.co.jp/HOT/ModelData/integra/6qti-ka-510/zs_sy.html

1988-1991
SOHC ZC DUAL CARB 9.1 CR 105 ps / 6300 RPM (Integra ZX, RX)
http://www.honda.co.jp/HOT/ModelData/integra/9it-ka-904b/4dzx_sy.html
SOHC ZC MPFI 9.1 CR 120 ps / 6300 RPM (Integra RXi, Txi, CONCERTO)
http://www.honda.co.jp/HOT/ModelData/integra/9it-ka-904a/3dtxi_sy.html
DOHC ZC MPFI 9.5 CR 130 ps / 6800 (Civic/CRX Si)
http://www.honda.co.jp/HOT/ModelData/crx/8cx-ka-709/si_sy.html
DYNOS: http://www.honda.co.jp/factbook/auto/CONCERTO/19880615/co88-018.html
1992-1995
SOHC ZC MPFI 9.1 CR 120/6300 (PS/rpm) (Integra)
http://www.honda.co.jp/HOT/ModelData/integra/94it3-ka-305/zxi_sy.html
SOHC ZC VTEC MPFI 9.2 CR 130/6600 (ps/rpm) (Domani Vi)
http://www.honda.co.jp/HOT/ModelData/domani/93dn-ka-210/vi_sy.html
DOHC ZC MPFI 9.5 CR 130 ps / 6800 RPM (Civic Ferio RTSi and Special Edition Civic Si)
http://www.honda.co.jp/HOT/ModelData/civic/92cv-k-109b/rtsi_sy.html
DYNOS: http://www.honda.co.jp/factbook/auto/DOMANI/19921030/do92-014.html

1996-2000
SOHC ZC MPFI 9.4 CR 120ps/6400 RPM (Integra)
http://www.honda.co.jp/factbook/auto/CIVIC/19950904/image3/028-005.jpg

ONLY one ZC engine currently remains under my speculation which is the 96^ SOHC ZC VTEC. Most of the engines I’ve seen show “D16A” stamp with VTEC solenoid. I’ve heard, but have not SEEN.

HOPE this helps bit
***EDIT thanks Davens***
 
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Maybe...but my carb'd ZC was actually date stamped with an "84" so I'm curious.

I'm having a helluva time getting the weber downdraft tuned...and it's supposed to be easier then sidedrafts.

Good info though.
 

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hey guys, I dont see a mention about the 92-95 SOHC ZC Carbed engine. 105whp and came in the Integra ZXi. I have one of these guys in my hatch. It came from a 94 integra. Its basically the same as the 88-91 but obd-1 and also had stiffer valve springs. thought I add that. :) Great Info!!
 

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yes. 127hp or 130ps. Not many D engines break the 130ps barrier save for the old browntop ZC-G DOHC = 135ps.
 
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