Honda H Engine

The Honda H engine was Honda's larger high-performance engine family from the 1990s and early 2000s. It is largely derived from the Honda F engine with which it shares many design features. Like Honda's other 4-cylinder families of the 80s and 90s, It has also enjoyed some success as a racing engine, forming the basis of Honda's touring car racing engines for many years, and being installed in lightweight chassis (such as the Honda CR-X) for use in drag racing. The F20B is a part of the F-series family of engines; it is basically a cast iron sleeved down destroked version of the H22A. It was developed by Honda to be able to enter into the 2-liter class of international racing.

H engine
Honda H23A-Accord Sir CH9
Overview
ManufacturerHonda
Layout
ConfigurationNaturally aspirated Inline-4
Displacement2.2–2.3 L; 131.6–137.9 cu in (2,157–2,259 cc)
Cylinder bore87 mm (3.43 in)
Piston stroke90.7 mm (3.57 in)
95 mm (3.74 in)
Block materialAluminum
Head materialAluminum
ValvetrainDOHC 4 valves x cyl. with VTEC
Compression ratio9.8:1-11.0:1
RPM range
Redline8600
Combustion
Fuel systemPGM-FI
Fuel typeGasoline
Cooling systemWater-cooled
Output
Power output160–220 PS (118–162 kW; 158–217 hp)
Torque output152–164 lb⋅ft (206–222 N⋅m)

H-Series consisted of two different displacements; H22 2.2 L (2,157 cc) and H23 2.3 L (2,259 cc). Both versions were using the same block; different crankshafts and connecting rods were utilized to achieve displacement variation.[1]

DOHC engines

H22

The H22 debuted in the U.S. in 1993 as the H22A1 for use in the Honda Prelude VTEC. Since then, versions of the H22 would become the Prelude's signature high-performance engine worldwide until the end of Prelude production in 2001. In 1994, Honda of Europe used the H22A cylinder head and the H22A engine block as the Formula 3 engine which was an H22A engine destroked from 2.2 liters to 2.0 liters (F3-2000cc) to compete in the European F3 series. It was then used by Mugen Motorsports as the F20B(MF204B) from 1997-2001. In 1995-1997, Honda of Europe used the same H22A-based F3 engine in the British Touring Car Championship (BTCC) Honda Accord. Also, in 1996-1997 Honda of Japan used the same H22A-based F3 engine in the Japan Touring Car Championship (JTCC) Honda Accord and won the JTCC for both years. Honda of Europe hired Neil Brown Engineering of England to convert the H22A engine into an F3 engine which would be later used in BTCC and JTCC.

Engine Specifications
  • Bore × Stroke: 87 mm × 90.7 mm (3.43 in × 3.57 in)
  • Displacement: 2.2 L; 131.6 cu in (2,157 cc)
  • Valve Configuration: DOHC, 16 valves, VTEC
  • Type: In-line 4 cylinder, aluminum block and head
  • Compression ratio: 10.0-10.6:1 (North America); 10.0-11.0:1 (Europe); 10.6-11.0:1 (Japan)
  • Max power: 185–220 hp (138–164 kW; 188–223 PS)
  • VTEC Engagement: 5800 rpm
  • Redline: 7200 - 7600 rpm
  • Rev Cut: 7400 - 8000 rpm
  • Engine Control System: Honda Systems PGM-FI with port fuel injection
  • Valve Gear: Belt-driven dual overhead cams, 4 valves per cylinder, variable timing and lift[2]
  • 92-96 versions use closed-deck blocks, while the 97-01 versions used open-deck blocks
  • All h22 variants use FRM cylinder liners

H22A DOHC VTEC Japan only
H22A VTEC engine
  • Engine Block Serial Codes (~ = serial productions numbers i.e. 1, 2, 3, etc.)
    • Found in 1992-1996 Honda Prelude BB4-BB6
      • H22A-1000001~ Si Vtec; Si Vtec-4WS
      • H22A-1040001~ Si Vtec; Si Vtec-4WS
      • H22A-1100001~ Si Vtec; Si Vtec-S Limited; Si Vtec-4WS
      • H22A-1150001~ Si Vtec; Si Vtec-Sport Package; Si Vtec-4WS
      • H22A-1200001~ Si Vtec; Si Vtec-Sport Package R-2 (M/T); Si Vtec-Sport Package G-2 (A/T); Si Vtec-4WS
    • Found in 1994-1997 Honda Accord SiR Sedan CD-6
      • H22A-2000001~
      • H22A-2020001~
      • H22A-2050001~
      • H22A-2070001~
    • Found in 1997 Honda Accord SiR Wagon CF-2
      • H22A-3030001~
    • Found in 1997-2001 Honda Prelude BB6-BB8
      • H22A-1250001~ SiR; SiR-4WS
      • H22A-4000001~ Type S
      • H22A-1270001~ SiR; SiR-4WS
      • H22A-4010001~ Type S
      • H22A-1280001~ SiR; SiR S spec; SiR-4WS
      • H22A-4020001~ Type S
      • H22A-1290001~ SiR; SiR S spec; SiR-4WS
      • H22A-4030001~ Type S
    • Found in 1999-2001 Honda Accord/Torneo Euro-R CL1
      • H22A-5000001~
      • H22A-5100001~

H22A
  • Found in the Japanese 4th gen 1992-1996 Prelude Si VTEC (2WS BB4 & 4WS BB1). It produces 200 PS (147 kW; 197 hp) @ 6,800 rpm & 161.5 ft⋅lbf (219 N⋅m) @ 5,500 rpm and comes with a black valve cover.
  • Found in the Japanese 5th gen 1997-2001 Prelude SiR (2WS BB6 & 4WS BB8). It produces 200 PS (147 kW; 197 hp) @ 6,800 rpm & 161.5 ft⋅lbf (219 N⋅m) @ 5,500 rpm and comes with a black valvecover.
  • Found in the Japanese 5th gen 1997-2001 Prelude Type-S and SiR S-Spec (BB6). It produces 220 PS (162 kW; 217 hp) @ 7,200 rpm & 163 ft⋅lbf (221 N⋅m) @ 6,500 rpm and comes with a red valvecover, more aggressive camshafts & adjustable timing gears for more top end power.
  • Found in the Japanese 5th gen 1994-1996 Accord SiR Sedan (CD6). It produces 190 PS (140 kW; 187 hp) @ 6,800 rpm & 152 ft⋅lbf (206 N⋅m) @ 5,500 rpm and comes with a black valvecover.
  • Found in the Japanese 5th gen 1997 Accord SiR Wagon (CF2). It produces 190 PS (140 kW; 187 hp) @ 6,800 rpm & 152 ft⋅lbf (206 N⋅m) @ 5,500 rpm and comes with a black valvecover.
  • Found in the Japanese 6th gen 1999-2001 Accord/Torneo Euro-R (CL1). It produces 220 PS (162 kW; 217 hp) @ 7,200 rpm & 163 ft⋅lbf (221 N⋅m) @ 6,500 rpm and comes with a red valvecover.

H22A1
  • Found in the American 4th gen Prelude VTEC (BB1). It produces 190 PS (140 kW; 187 hp) @ 6,800 rpm & 153 ft⋅lbf (207 N⋅m) @ 5,500 rpm and comes with a black valvecover.
  • Found in the Canadian 4th gen Prelude SR-V (BB1). It produces 190 PS (140 kW; 187 hp) @ 6,800 rpm & 153 ft⋅lbf (207 N⋅m) @ 5,500 rpm and comes with a black valvecover.
  • Found in the Australian 4th gen VTi-R (BB1). It produces 190 PS (140 kW; 187 hp) @ 6,800 rpm & 153 ft⋅lbf (207 N⋅m) @ 5,500 rpm and comes with a black valvecover.

H22A2
  • Found in the European 4th gen Prelude 2.2i VTEC (BB1). It produces 185 PS (136 kW; 182 hp) and comes with a black valvecover.

H22A3
  • Found in the 1996 VTEC model (BB1) in various countries around the world denoted with regional code KU. It comes with a black valvecover.
  • Found in the 1994 Honda Accord Coupe SiR with the CD8 chassis in countries like New Zealand. Built in the USA yet sold only overseas. Reputedly 182 hp (185 PS; 136 kW) peak output.

H22A4
  • Found in the American 5th gen Prelude Base and Type-SH (BB6). It produces 200 PS (147 kW; 197 hp) @ 7,000 rpm & 156 ft⋅lbf (212 N⋅m) @ 5,250 rpm and comes with a black valvecover.
  • Found in the Canadian 5th gen Prelude Base, Type-SH, and SE (BB6). It produces 200 PS (147 kW; 197 hp) @ 7,000 rpm & 156 ft⋅lbf (212 N⋅m) @ 5,250 rpm and comes with a black valvecover.
  • Found in the Australian 1997-1998 Prelude VTi-R and VTi-R ATTS (BB6). It produces 200 PS (147 kW; 197 hp) @ 7,000 rpm & 156 ft⋅lbf (212 N⋅m) @ 5,250 rpm and comes with a black valvecover.

H22A5
  • Found in the European 1997-1998 Prelude 2.2VTi/VTi-S (2WS BB6 & 4WS BB8). It produces 185 PS (136 kW; 182 hp) and comes with a black valvecover.

H22A7
  • Found in the European 1998-2002 Accord Type-R (CH1). It produces 212 PS (156 kW; 209 hp) @ 7,200 rpm and 164 lb⋅ft (222 N⋅m) @ 6,700 rpm and comes with a red valvecover.

H22A8
  • Found in the European 1999-2001 Prelude 2.2VTi/VTi-S (2WS BB6 & 4WS BB8). It produces 200 PS (147 kW; 197 hp) @ 7,100 rpm & 156 ft⋅lbf (212 N⋅m) @ 5,250 rpm and comes with a red valvecover.

H22Z1
  • Found in the Australian 1999-2001 VTi-R and VTi-R ATTS (BB6). It is thought to be identical to the H22A4, however, there is speculation that power was increased from 200 PS (147 kW; 197 hp) to 203 PS (149 kW; 200 hp). It comes with a Black valvecover on the normal VTi-R but on the VTi-R ATTS it comes with a Red valvecover.

H23

The H23 was an increased-stroke, non-VTEC version of the H22, used in Japan, North America, and Europe. It shared the same Fiber Reinforced Metal (FRM) cylinder wall liners with the H22.

Specifications

  • Bore × Stroke: 87 mm × 95 mm (3.43 in × 3.74 in)
  • Displacement: 2.3 L; 137.9 cu in (2,259 cc)
  • Valve Configuration: DOHC, 16 valves
  • Type: In-line 4 cylinder, aluminum block and head
  • Compression ratio: 9.8:1
  • Max power: 160 hp (119 kW; 160 hp)
  • Max torque: 156 lb⋅ft (212 N⋅m)
  • Redline: 6500rpm
  • Engine Control System: Honda Systems PGM-FI with port fuel injection
  • Valve Gear: belt-driven dual overhead cams, 4 valves per cylinder

H23A-P13
  • Found in the Japanese 1992-1996 Ascot Innova 2.3Si-Z (2WS CC4 & 4WS CC5). It produces 165 PS (121 kW; 163 hp) & 156 lb⋅ft (212 N⋅m) and comes with a "blue top".

H23A1
  • Found in the American 4th gen Prelude Si (BB2). It produces 162 PS (119 kW; 160 hp) & 156 lb⋅ft (212 N⋅m) and comes with a "black top".
  • Found in the American 1995 Prelude SE (BB2). It produces 162 PS (119 kW; 160 hp) & 156 lb⋅ft (212 N⋅m) and comes with a "black top".
  • Found in the Canadian 4th gen Prelude SR (BB2). It produces 162 PS (119 kW; 160 hp) & 156 lb⋅ft (212 N⋅m) and comes with a "black top".
  • Found in the Australian 4th gen Prelude Si (BB2). It produces 162 PS (119 kW; 160 hp) & 156 lb⋅ft (212 N⋅m) and comes with a "black top".
  • Found in the Australian 1991-1993 Prelude SRS (BB2). It produces 162 PS (119 kW; 160 hp) & 156 lb⋅ft (212 N⋅m) and comes with a "black top".

H23A2
  • Found in the European 4th gen Prelude 2.3i (BB2). It produces 162 PS (119 kW; 160 hp) & 154 lb⋅ft (209 N⋅m) and comes with a "black top".

H23A3
  • Found in the European 1993-1995 Accord 2.3i SR (CC7). It produces 162 PS (119 kW; 160 hp) & 154 lb⋅ft (209 N⋅m) and comes with a "black top".
  • Found in the European 1993-1999 Rover 623 SLi, GSi, and iS. It produces 162 PS (119 kW; 160 hp) & 154 lb⋅ft (209 N⋅m) and comes with a "black top".

H23A DOHC VTEC

In 1998, Honda of Japan produced a rare DOHC VTEC version of the H23A engine for use in Japan only. It has been factory modified with an internal oil passage in the H23A block to operate the VTEC solenoid in the H22A head. It has the same horsepower rating as the H22A engine but a lower redline of 7200rpms because it has a longer stroke than the H22A. The H23A DOHC VTEC has 87 mm × 95 mm (3.43 in × 3.74 in) (bore and stroke) and the H22A DOHC VTEC has 87 mm × 90.7 mm (3.43 in × 3.57 in) (bore and stroke). The H23A DOHC VTEC Engine is largest displacement in the H Series engines with a compression ratio of 10.6:1.

  • Found in the Japanese 1998-2002 Accord Wagon SiR (CH9). It produces 200 PS (147 kW; 197 hp) @ 6,800 rpm & 163 lb⋅ft (221 N⋅m) @ 5,300 rpm and comes with a "blue top".
  • Found in the Japanese 1998-2002 Accord Wagon AWD (CL2). It produces 190 PS (140 kW; 187 hp) @ 6,800 rpm & 163 lb⋅ft (221 N⋅m) @ 5,300 rpm and comes with a "blue top".

Below is a chart that consists all of the engines in the H / F Series.

H Series Motor Specifications Chart 1
Engine Type Bore x Stroke Power Comp. Height Deck Height Head
H22A Closed Deck 87 mm × 90.7 mm (3.43 in × 3.57 in) 220 PS (162 kW; 217 hp) @ 7,200 rpm & 163 lb⋅ft (221 N⋅m) @ 6,500 rpm 31 mm (1.2 in) 219.5 mm (8.64 in) 53.8 cc (3.28 cu in)
H22A1 190 PS (140 kW; 187 hp) @ 6,800 rpm & 158 lb⋅ft (214 N⋅m) @ 5,500 rpm
H22A2 Closed Deck 185 PS (136 kW; 182 hp)
H22A3 182 hp (185 PS; 136 kW)
H22A4 Open Deck 87 mm × 90.7 mm (3.43 in × 3.57 in) 200 PS (147 kW; 197 hp) @ 7,000 rpm & 156 lb⋅ft (212 N⋅m) @ 5,250 rpm 31 mm (1.2 in) 219.5 mm (8.64 in) 53.8 cc (3.28 cu in)
H22A5 Open Deck 185 PS (136 kW; 182 hp)
H22A7 212 PS (156 kW; 209 hp)
H22A8 200 PS (147 kW; 197 hp) @ 7,100 rpm & 156 lb⋅ft (212 N⋅m) @ 5,250 rpm
H22Z1 203 PS (149 kW; 200 hp)
H23A Open Deck 87 mm × 95 mm (3.43 in × 3.74 in) 165 PS (121 kW; 163 hp) & 156 lb⋅ft (212 N⋅m) 30.5 mm (1.20 in) 219.5 mm (8.64 in) 50 cc (3.1 cu in)
H23A1 Closed Deck 162 PS (119 kW; 160 hp) & 156 lb⋅ft (212 N⋅m)
H23A2 160 PS (118 kW; 158 hp) & 154 lb⋅ft (209 N⋅m)
H23A3
H23A DOHC VTEC Open Deck 87 mm × 95 mm (3.43 in × 3.74 in) 200 PS (147 kW; 197 hp) & 163 lb⋅ft (221 N⋅m)

H Series Motor Specifications Chart 2
Engine Rod Length Rod Width Main Bore Pin Bore Piston Volume Wrist Pin Diam. Main Bearing Width Rod Bearing Width
H22A 143 mm (5.6 in) 23.75 mm (0.935 in) 51 mm (2.0 in) 21.97–21.98 mm (0.865–0.865 in) −1.9 cc (−0.12 cu in) 22 mm (0.87 in) 19.9 mm (0.78 in) 19.35 mm (0.762 in)
H22A1 −1.8 cc (−0.11 cu in)
H22A2
H22A3
H22A4 143 mm (5.6 in) 23.75 mm (0.935 in) 51 mm (2.0 in) 21.97–21.98 mm (0.865–0.865 in) −1.8 cc (−0.11 cu in) 22 mm (0.87 in) 19.9 mm (0.78 in) 19.35 mm (0.762 in)
H22A5
H22A7
H22A8
H22Z1
H23A 141.5 mm (5.57 in) 23.75 mm (0.935 in) 51 mm (2.0 in) 21.97–21.98 mm (0.865–0.865 in) +4.3 cc (0.26 cu in) 22 mm (0.87 in) 19.9 mm (0.78 in) 19.35 mm (0.762 in)
H23A1 −9.9 cc (−0.60 cu in)
H23A2
H23A3
H23A VTEC 141.5 mm (5.57 in)

H Series Motor Specifications Chart 3
Engine Intake Valve Diam. Exhaust Valve Diam. Main Journal Diam. Rod Journal Diam.
H22A 35 mm (1.4 in) 30 mm (1.2 in) 50 mm (2.0 in) 47.95 mm (1.888 in)
H22A1
H22A2
H22A3
H22A4 35 mm (1.4 in) 30 mm (1.2 in) 55 mm (2.2 in)
(1997 only = 50 mm (2.0 in))		 47.95 mm (1.888 in)
H22A5
H22A7
H22A8
H22Z1
H23A 35 mm (1.4 in) 30 mm (1.2 in) 55 mm (2.2 in) 47.95 mm (1.888 in)
H23A1 34 mm (1.3 in) 29 mm (1.1 in) 50 mm (2.0 in)
H23A2
H23A3
H23A VTEC 55 mm (2.2 in)
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See also

Notes
  1. JDM Spec Engines - Honda H-Series Engines
  2. Honda Motor Co., LTD.: "1993 Prelude Service Manual", p. 3-15. Service Publication Office, 1992
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