ZC (similar to D16Y4, D16A8, D16Z6, D16A1, D16A3, D16A6, D16A9 and D16Z5 engines)
A few D-series variants are labelled (Japanese: Honda ZC engine) (usually JDM), but they are not truly a different series.
There are both SOHC and DOHC ZC engines.
The non-VTEC SOHC ZC is similar to the D16A6 ('91–'96) and D16Y4 ('96–2000) engine, but with more aggressive cam timing.
The SOHC VTEC ZC is similar to the D16Z6 ('91–'96).
The DOHC ZC is similar to the D16A1, D16A3, D16A8, D16A9 and D16Z5 engines.
SOHC ZC VTEC
1991–1993 Honda Civic Ferio EJ3 (JDM)
1992–1995 Honda Civic EJ1 (JDM)
1992–1995 Honda Domani MA4 (JDM)
Displacement : 1,590 cc (97 cu in)
Bore and Stroke : 75 mm × 90 mm (3.0 in × 3.5 in)
Rod Length : 137MM
Rod/Stroke : 1.52
Compression : 9.2:1
Power : 128 hp (95.6 kW, 130 ps) at 6,600 rpm
Torque : 107 ft·lb (14.8 kg/m, 145 Nm) at 5,200 rpm
Redline : 7,200 rpm
Fuel Cut : 7,300 rpm
VTEC Switchover : 5,500 rpm
Fuel Control : OBD-1 MPFI
ECU Code : P70 (Domani), P91 (Civic Coupé), P29
Found in (JDM)
1984–1987 Honda Ballade CRX AS
1984–1987 Honda Civic AT
1985–1987 Honda Integra AV/DA1 (Some model equipped with Single Carburetor)
1986–1991 Honda CRX EF7
1992–1995 Honda Civic EH1
Displacement : 1,590 cc
Bore and Stroke : 75 mm X 90 mm
1984–1987 Compression : 9.3:1 1988–1989 Compression : 9.5: 1
Single Carburetor : 99 hp (74 kW, 100 ps) at 6,800 rpm; Torque : 92 ft·lbf (12.8 kg/m, 126 Nm) at 5,500 rpm
1984–1987 Power : 113 hp (84.3 kW, 115 ps) at 6,250 rpm; Torque : 99 ft·lbf (13.7 kg/m, 134 Nm) at 5,500 rpm
1988–1989 Power : 118 hp (88.0 kW, 120 ps) at 6,500 rpm; Torque : 103 ft·lbf (14.0 kg/m, 137 Nm) at 5,500 rpm
1988–1991 Power : 130 hp (96.9 kW, 132 ps) at 6,800 rpm; Torque : 106 ft·lbf (14.7 kg/m, 144 Nm) at 5,700 rpm
Valvetrain : DOHC
Piston Code 1986-'87 : PG6
Piston Code 1988-'89 : PM7
Fuel Control : OBD-0 MPFI
Euro Mk1 ('85-'87) 1.6 CRX's are fitted with an engine designated "ZC1" which is a higher spec 125 hp (96.9 kW, 132 ps) version of the D16A1. Which were later to be switched out with the D16A8 or B16A depending on which model.
1st Gen ZC Identified by: External coil, small distributor, dual butterfly TB, cam cover bolts on top, brown/gold cam cover. Large cam pulleys. +3cc PG6B pistons, non-pent roof combustion chamber. As a ZC it appeared in JDM AV Integra Si and JDM E-AT Civic/CR-X Si. Commonly produced at the time but now over 20 years old and getting harder to find. D-series version D16A1 '86-'87
2nd Gen ZC (rarest) Identified by: Internal coil, large distributor, single butterfly TB mounted on slight angle forward, bolts on top of cam cover, black cam cover, large cam pulleys. +7cc PM7 pistons, 43 cc Pent roof combustion chamber. As a ZC appeared in JDM facelift AV bodied Integra Si did not appear in Civic or CR-X, rarest ZC only produced for less than one year. D-series version D16A1 '88-'89 (sometimes +7cc P29 pistons)
3rd Gen ZC Identified by: Internal coil, large distributor, single butterfly TB. Black cam cover. Cam cover bolts on the sides. Small cam pulleys. Inlet Manifold stamped PM7. +7cc PM7 pistons, 43 cc Pent roof combustion chamber. As a ZC appeared in JDM EF3 civic and EF7 CR-X, did not appear in an Integra body. Most commonly produced ZC, manufactured in Japan from end of '87 through to early '91 D-series version D16A8/9 (Euro Civic Si) (sometimes +7cc P29 pistons)
4th Gen ZC Identified by: Internal coil. OBD1 EFi system (grey plug). No cam angle sensor on exhaust cam, now located in distributor. Rubber plug where cam angle sensor would mount. Black cam cover. No PGM-EFi plate on the inlet manifold, replaced with three ribs instead. P29 stamped on inlet manifold. MAP sensor on TB. +7cc PM7 pistons, pent roof combustion chamber. As a ZC only appeared in EG5 Civic bodies, no Integra or CRX received this engine. Reasonably common produced from '92 to '94. (20th Anniversary edition & Japanese car of the year) D-series version D16A8/9 (Euro & Australia Civic Si) (sometimes +7cc P29 pistons)