ZC Research
05-28-2004, 11:41 AM
#1
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ZC Research
The ZC name is applied to many different engines. Unfortunately I can not find a definative list of EVERY type of ZC but the following information is pretty good and will expand our collective knowledge.
A few things we definitely know-
* The ZC came with carbs and fuel injection.
* The ZC came as a DOHC and a SOHC.
* The ZC is not CARB (California Air Resources Board) legal.
* The D16A1 in the USDM 1986-89 Integra is not a ZC, but has a similar block.
* The ZC has two different major types, Early and Late.
* The Early DOHC ZC had the Valve Cover bolts on the middle of the valve cover
* The Late DOHC ZC has the Valve cover bolts on the outside edge of the valve cover.
* The SOHC ZC and the Late DOHC ZC are related to the 1988+ D series engines. These engines DO NOT bolt up to the 1986-89 Integra transmission and because of this they are not a direct bolt in to the 1st Gen CRX.
The following is info I found on the web regarding ZC engines.
From the Temple of Vtec- Asia
The ZC Engine
In Honda's line-up of engines, perhaps the one which leads to the greatest amount of confusion would be the ZC engine. This engine comes in a wide variety of form. In this installment of topic of the moment, TOV-A looks at the various forms of the ZC engine. As usual, we try to be exhaustive in this examination but there is always the possibility we could have missed out on one or more items. Let us know if we have missed any out.
As far as TOV-A knows, the ZC engine comes with an engine block that has 4 cylinders, water-cooled, with bore and stroke as 75mm by 90mm, ie an undersquare design. Thus, the capacity of the ZC engine is always 1590cc. The ZC engine comes in various configurations, SOHC, DOHC, carbureted as well as fuel-injected. The only configuration that ZC does not come in is in DOHC-VTEC form. The ZC engine is also used in a large variety of models. The list below tries to tie the various configuration of the ZC engine to examples of Honda models and types that they appear in. This list is not intended to be exhaustive.
SOHC twin-carbureted
16V SOHC, with dual Keihin carbs mounted side-ways.
Max Power : 105ps.
DA-series Honda Integra RX and ZX.
DC-series Honda Integra ZX.
EG-series Honda Ferio RTX (EH1) with 'realtime' 4WD.
SOHC PGM-Fi
16V SOHC, Programmed Fuel Injection.
Max Power : 120ps.
EF-series Honda Civic 36i (4door).
DA-series Honda Integra RXi and ZXi.
DB/DC-series Honda Integra ZXi.
Revised DB/DC-series Honda Integra, various models, eg Ti, Xi-G, Xi(4WD).
SOHC VTEC PGM-Fi
16V SOHC with VTEC, Programmed Fuel Injection.
Max Power : 130ps.
EG-series Honda Civic Ferio EXi (coded as E-EJ3).
.
DOHC PGM-Fi (First generation)
16V DOHC, Programmed Fuel Injection.
Max Power : 125ps.
1st Generation Honda Civic Si.
1st Generation Honda (coded as E-AS) CRX Si.
1st generation Honda 'Quint' Integra GSi and RSi.
DOHC PGM-Fi (Second generation)
16V DOHC, Programmed Fuel Injection.
Max Power : 130ps.
EF-series Honda Civic (4door and 3door) Si.
EF-series Honda CRX Si (EF7).
EG-series Honda Civic Ferio RTSi (EH1) with 'realtime' 4WD.
The ZC engine also appears in other Honda lines, notably in SOHC PGM-Fi and SOHC Dual-Carb'ed form in the Concerto line-up which was also available for export (Singapore is one country which has this model in its domestic lineup).
The ZC engine also appears in other Honda lines, notably in SOHC PGM-Fi and SOHC Dual-Carb'ed form in the Concerto line-up which was also available for export (Singapore is one country which has this model in its domestic lineup).
Of note is the 1.6l SOHC VTEC PGM-Fi engine as used in the JDM Honda Civic Coupe and various current generation EK-series Civic types although having the same capacity (1590cc) with same bore and stroke is coded D16A instead of ZC. In fact, the EJ1 JDM Civic Coupes have plates that states they're manufactured in the United States.
The same configuration of engine, with matching power output levels, (120ps at the same rpm), is also available in what can best be described as 'lesser' markets for Honda. This engine then often powers the top models for that market. An example is the Malaysian domestic line-up, which for the previous and current generation has a Honda Civic 1.6EXi which is powered by a 120ps 1.6l SOHC PGM-Fi engine but coded as SM16A. Similary, for the equivalent EF-generation, the Malaysian domestic line-up has a top model, the Honda Civic 1.6EX which is powered by a 105ps 1.6l SOHC Dual-Carb'ed engine coded as D16Z1. There is a distinct possibility that these engines are localised export versions of the 'master' JDM ZC engine.
One interesting item that TOV-A has come across is a ZC engine that is DOHC but uses dual-carburetters. The owner whom contacted us to find out more about the engine says that it came off an older JDM Integra. Unfortunately, TOV-A is not unware that such a configuration of the ZC engine even exists ! If any of you have any additional data on this engine, please let us know.
Temple of VTEC - Asia. June 03 1998
A few things we definitely know-
* The ZC came with carbs and fuel injection.
* The ZC came as a DOHC and a SOHC.
* The ZC is not CARB (California Air Resources Board) legal.
* The D16A1 in the USDM 1986-89 Integra is not a ZC, but has a similar block.
* The ZC has two different major types, Early and Late.
* The Early DOHC ZC had the Valve Cover bolts on the middle of the valve cover
* The Late DOHC ZC has the Valve cover bolts on the outside edge of the valve cover.
* The SOHC ZC and the Late DOHC ZC are related to the 1988+ D series engines. These engines DO NOT bolt up to the 1986-89 Integra transmission and because of this they are not a direct bolt in to the 1st Gen CRX.
The following is info I found on the web regarding ZC engines.
From the Temple of Vtec- Asia
The ZC Engine
In Honda's line-up of engines, perhaps the one which leads to the greatest amount of confusion would be the ZC engine. This engine comes in a wide variety of form. In this installment of topic of the moment, TOV-A looks at the various forms of the ZC engine. As usual, we try to be exhaustive in this examination but there is always the possibility we could have missed out on one or more items. Let us know if we have missed any out.
As far as TOV-A knows, the ZC engine comes with an engine block that has 4 cylinders, water-cooled, with bore and stroke as 75mm by 90mm, ie an undersquare design. Thus, the capacity of the ZC engine is always 1590cc. The ZC engine comes in various configurations, SOHC, DOHC, carbureted as well as fuel-injected. The only configuration that ZC does not come in is in DOHC-VTEC form. The ZC engine is also used in a large variety of models. The list below tries to tie the various configuration of the ZC engine to examples of Honda models and types that they appear in. This list is not intended to be exhaustive.
SOHC twin-carbureted
16V SOHC, with dual Keihin carbs mounted side-ways.
Max Power : 105ps.
DA-series Honda Integra RX and ZX.
DC-series Honda Integra ZX.
EG-series Honda Ferio RTX (EH1) with 'realtime' 4WD.
SOHC PGM-Fi
16V SOHC, Programmed Fuel Injection.
Max Power : 120ps.
EF-series Honda Civic 36i (4door).
DA-series Honda Integra RXi and ZXi.
DB/DC-series Honda Integra ZXi.
Revised DB/DC-series Honda Integra, various models, eg Ti, Xi-G, Xi(4WD).
SOHC VTEC PGM-Fi
16V SOHC with VTEC, Programmed Fuel Injection.
Max Power : 130ps.
EG-series Honda Civic Ferio EXi (coded as E-EJ3).
.
DOHC PGM-Fi (First generation)
16V DOHC, Programmed Fuel Injection.
Max Power : 125ps.
1st Generation Honda Civic Si.
1st Generation Honda (coded as E-AS) CRX Si.
1st generation Honda 'Quint' Integra GSi and RSi.
DOHC PGM-Fi (Second generation)
16V DOHC, Programmed Fuel Injection.
Max Power : 130ps.
EF-series Honda Civic (4door and 3door) Si.
EF-series Honda CRX Si (EF7).
EG-series Honda Civic Ferio RTSi (EH1) with 'realtime' 4WD.
The ZC engine also appears in other Honda lines, notably in SOHC PGM-Fi and SOHC Dual-Carb'ed form in the Concerto line-up which was also available for export (Singapore is one country which has this model in its domestic lineup).
The ZC engine also appears in other Honda lines, notably in SOHC PGM-Fi and SOHC Dual-Carb'ed form in the Concerto line-up which was also available for export (Singapore is one country which has this model in its domestic lineup).
Of note is the 1.6l SOHC VTEC PGM-Fi engine as used in the JDM Honda Civic Coupe and various current generation EK-series Civic types although having the same capacity (1590cc) with same bore and stroke is coded D16A instead of ZC. In fact, the EJ1 JDM Civic Coupes have plates that states they're manufactured in the United States.
The same configuration of engine, with matching power output levels, (120ps at the same rpm), is also available in what can best be described as 'lesser' markets for Honda. This engine then often powers the top models for that market. An example is the Malaysian domestic line-up, which for the previous and current generation has a Honda Civic 1.6EXi which is powered by a 120ps 1.6l SOHC PGM-Fi engine but coded as SM16A. Similary, for the equivalent EF-generation, the Malaysian domestic line-up has a top model, the Honda Civic 1.6EX which is powered by a 105ps 1.6l SOHC Dual-Carb'ed engine coded as D16Z1. There is a distinct possibility that these engines are localised export versions of the 'master' JDM ZC engine.
One interesting item that TOV-A has come across is a ZC engine that is DOHC but uses dual-carburetters. The owner whom contacted us to find out more about the engine says that it came off an older JDM Integra. Unfortunately, TOV-A is not unware that such a configuration of the ZC engine even exists ! If any of you have any additional data on this engine, please let us know.
Temple of VTEC - Asia. June 03 1998
05-28-2004, 12:18 PM
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Re: ZC Research
I would like to add/correct a couple things.
The early browntop dohc fuel injected ZC had 135 PS. Yes, the browntop made 5 more PS then the later blacktop.
There is also a single carbed dohc browntop ZC. I have one in my 87 wagon. It's from the Integra predecessor, the quint and quintet. 115 PS.
The 88-91 sohc fuel injected zc made 120 PS (or 118hp). But people are hard pressed to tell you where that 10 hp differencet between the zc and the a6 comes from.
Kwicko measured the cams...they are mildly different. We're unsure if it's enough to account for 10hp. Some sohc zcs use the 4-1 header, some use the 4-2-1.
For the zc gospel...strat translating Hondas archives
http://www.honda.co.jp/factboo....html
The early browntop dohc fuel injected ZC had 135 PS. Yes, the browntop made 5 more PS then the later blacktop.
There is also a single carbed dohc browntop ZC. I have one in my 87 wagon. It's from the Integra predecessor, the quint and quintet. 115 PS.
The 88-91 sohc fuel injected zc made 120 PS (or 118hp). But people are hard pressed to tell you where that 10 hp differencet between the zc and the a6 comes from.
Kwicko measured the cams...they are mildly different. We're unsure if it's enough to account for 10hp. Some sohc zcs use the 4-1 header, some use the 4-2-1.
For the zc gospel...strat translating Hondas archives
http://www.honda.co.jp/factboo....html
05-28-2004, 05:59 PM
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Re: ZC Research (ZCdohcHB)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ZCdohcHB »</TD></TR><TR><TD CLASS="quote">where did u get ur info from? that the brown top has more power than the black top. i would like to know</TD></TR></TABLE>
honda brochures...
honda brochures...
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