Honda F engine

From Wikipedia, the free encyclopedia

The Honda F-Series engine was Honda's "big block" SOHC inline four, though lower production DOHC versions of the F-series were built. It features an aluminum open deck cast iron sleeved block and aluminum/magnesium cylinder head. Honda's F22B1 Engine won a spot on the Ward's 10 Best Engines List in 1995 and 1996.

[edit] SOHC engines

[edit] F18A

This engine was used by Honda.

• Bore × Stroke: 85.0 × 81.0 mm
• Displacement: 1849 cc
• Valve Configuration: SOHC, 16 valves
• 118 bhp up to 1997
• 105PS @ 6000 rpm, 14.6 kg m @ 4000 rpm (PGM-carb)
• Fuel consumption : 13.0 km/l

[edit] F18B

This engine was used for the Honda Accord 1.8 VTS/VTE in Japan. Also found in the European Honda Accord Vtec S.

Specifications

• Bore × Stroke: 85.0 × 81.0 mm
• Displacement: 1849 cc
• Valve Configuration: SOHC, 16 valves, VTEC
• Compression ratio: 9.3:1
• Max power: 138PS (103 kW)
• Max torque: 124 ft·lbf (165 N m)

[edit] F20A

This engine series was used in the Honda Accords in Japan and Europe. The DOHC F20A was also derived from this engine (see below).

Specifications

• Bore × Stroke: 85.0 × 88.0 mm
• Displacement: 1997 cc
• Compression ratio : 9.5:1
• Valve Configuration: SOHC, 16 valves
• Max output : F20A2 / F20A4 / F20A8 110 PS @ 6000 rpm (PGM-carb) 133 PS @ 5400 rpm (PGM-Fi),
• Max output : F20A5 150 Ps @ 5400 rpm (PGM-Fi)
• Max output : F20A7 147 PS @ 5600 rpm (PGM-Fi)
• Max torque : F20A2 / F20A4 / F20A8 18.5 kg m @ 4300 rpm (PGM-Fi), 16.1 kg m @ 3800 rpm (PGM-carb)
• Max torque : F20A7 19.3 kg m @ 4400 rpm (PGM-Fi)
• Fuel consumption (Japan Combined Cycle) : 9.6 km/l (PGM-Fi), 9.8 km/l (PGM-carb)

This engine also spawned many variants, according to market, but the specs remain largely similar

[edit] F20B

Specifications

• Displacement: 1997 cc
• Configuration Valve: SOHC/DOHC, 16 valves, VTEC/Non-Vtec

This engine came in SOHC in vtec and non vtec, there is also a DOHC VTEC version of the engine, they all share the same engine code although they are very different.

DOHC VTEC Manual Version:

• 197 HP @ 7200RPM
• 145 TQ @ 6600RPM
• 11.0:1 CR
• 85mm bore
• 88mm stroke
• 23mm wrist pin
• 145.5mm rods (f20b rod length = 145.425)
• 1.65 r/s ratio
• 55mm mains like h22a4 block

rod journal has been offset ground on both sides to the size of a b-series rod journal.

[edit] F20Z

This engine series is similar to the F20A above, used in the Honda Accord in Asia and Europe.

Specifications

• Bore × Stroke: 85.0 × 88.0 mm
• Displacement: 1997 cc
• Valve Configuration: SOHC, 16 valves

[edit] F22A

This engine series was used in the Honda Accord and Honda Prelude S. Aside from differences in tuning, these engines are substantially similar.

Specifications

• Bore × Stroke: 85.0 × 95.0 mm
• Displacement: 2156 cc
• Valve Configuration: SOHC, 16 valves, non-VTEC
• Compression ratio: 8.8:1
• Max power:
  • F22A1: 125 hp (93.21 4 kW) @ 5200 rpm. NOTE* The 1992-1996 Prelude S had a F22A1 but because of a different more aggressively tuned ECU (P12), the power output was 135 hp (101 kW).
  • F22A4: 130 hp (96.94 kW) @ 5200 rpm. The F22A4 is the same motor as the F22A1 but it has slightly more power due to a tubular designed header and slightly bigger exhaust piping.
  • F22A6: 140 hp (104.40 kW) @ 5600 rpm. The F22A6 is the same as the F22A1 except for a slightly more aggressive camshaft, a better flowing cast exhaust manifold, a different more aggressively tuned ECU (PT6), and a different intake manifold that utilizes IAB's and also has a bigger plenum. The F22A6 also has a windage tray in the oil pan, and stiffer valve springs to accommodate the more aggressive camshaft.
  • F22A7: 140 hp (104.40 kW) @ 5900 rpm (147hp/108kW with automatic transmission)
• Max torque:
  • F22A1: 137 ft·lbf (186 N m) @ 4000 rpm
  • F22A4: 142 ft·lbf (193 N m) @ 4000 rpm
  • F22A6: 150 ft·lbf (193 N m) @ 4500 rpm
  • F22A7: 145 ft·lbf (198 N m) @ 5000 rpm

[edit] F22B1

This engine was used in the Honda Accord EX and Acura CL 2.2. It was the first F engine to feature VTEC.

Specifications

• Bore × Stroke: 85.0 × 95.0 mm
• Displacement: 2156 cc
• Valve Configuration: SOHC, 16 valves, VTEC
• Compression ratio: 8.8:1
• Max power: 145 hp (108 kW) @ 5500 rpm
• Max torque: 147 ft·lbf (199 N m) @ 4500 rpm

[edit] F22B2

This engine was used in the 1994-1997 Honda Accord DX, LX and SE. The F22B6 in the 1995-1997 Honda Odyssey and the F22B8 in the Honda Shuttle are substantially similar. Also the F22B3 engine used in the 1994-1997 Australian and New Zealand Honda Accord LXi are basically the same engine apart from slightly different intake and exhaust manifolds.

Specifications

• Bore × Stroke: 85.0 × 95.0 mm
• Displacement: 2156 cc
• Valve Configuration: SOHC, 16 valves
• Compression ratio: 8.8:1
• Max power: 130 hp (97 kW) @ 5300 rpm
• Max torque: 139 ft·lbf (188 N m) @ 4200 rpm

The F22B in the BA9 Prelude had a DOHC configuration

JDM engines were stamped only as F22B.

[edit] F22Z2

This engine was used in the Honda Accord 2.2i.

Specifications

• Bore × Stroke: 85.0 × 95.0 mm
• Displacement: 2156 cc
• Valve Configuration: SOHC, 16 valves, VTEC
• Compression ratio: 9.3:1
• Max power: 150 hp (112 kW) @ 5500 rpm
• Max torque: 148 ft·lbf (200 Nm) @ 4500 rpm

[edit] F23A1

This engine was used in the Honda Accord EX, SE, and LX, and Acura 2.3CL in North America.

Specifications

• Bore × Stroke: 86.0 × 97.0 mm
• Displacement: 2254 cc
• Valve Configuration: SOHC, 16 valves, VTEC
• Compression ratio: 9.3:1
• Max power: 150 hp (112 kW) @ 5700 rpm
• Max torque: 152 ft·lbf (205 N m) @ 4900 rpm

The F23A4 is substantially similar, but features ULEV certification with a slight reduction of power: 148 hp (110 kW) with a maximum torque of 148 ft·lbf (200 Nm). This engine has a different exhaust manifold and a 32-bit ECU which uses a wideband oxygen sensor.

The 1998 Honda Odyssey and the 1998-1999 Isuzu Oasis used the F23A7 engine, which was substantially similar to the F23A1.

[edit] F23A5

This engine was used in the 1998-2002 Honda Accord DX in North America.

Specifications

• Bore × Stroke: 86.0 × 97.0 mm
• Displacement: 2254 cc
• Valve Configuration: SOHC, 16 valves
• Compression ratio: 8.8:1
• Max power: 135 hp (100 kW) @ 5500 rpm
• Max torque: 153 ft·lbf (206 Nm) @ 4500 rpm

[edit] DOHC engines

[edit] F20A

This engine was used in the 1990-1993 CB3 and CB4Honda Accord 2.0Si and Si-T in Japan.

Specifications

• Bore × Stroke: 85.0 × 88.0 mm
• Displacement: 1997 cc
• Valve Configuration: SOHC, 16 valves
• Compression ratio: 9.5:1
• Max power: 150 hp (112 kW) @ 6100 rpm
• Max torque: 137 ft·lbf (186 Nm) @ 5000 rpm

[edit] F20B

This engine series was used in the CF4, CF5, CF9, CL3 Honda Accord and Honda Torneo from Japan. It uses a DOHC VTEC cylinder head similar to the H22A found in the Prelude but was designed to comply with many countries' sub-2.0 liter tax. The automatic transmission versions received the lower hp version (180 hp), as it was tuned for more mid-range torque than its manual transmission counterpart.

Specifications

• Accord SiR wagon, SiR-T F20B 97-01 2.0L
• Valve train: 4 Cylinder, DOHC VTEC, 16 Valve
• Bore: 85.0 mm
• Stroke: 88.0 mm
• Displacement: 1997 cc
• Torque: 145 ft·lbf (197 N·m) @ 5500 rpm
• Horsepower: 200 hp (150 kW) @ 7000 rpm
• Red Line: 8200 rpm
• Compression: 11.0:1
• Fuel Control: OBD-2

[edit] F20C

This engine was a radical departure from previous F engines, and only shared basic dimensions such as bore spacing. It was designed specifically for the Honda S2000 and shares some engineering with the Honda K engine. A long-stroke F22C1 variant was also produced.

[edit] F22B

This engine was used in the 1992-1996 Honda Prelude Si in Japan. It is similar to the H23A

Specifications

• 2.2L
• Bore × Stroke: 85.0 × 95.0 mm
• Displacement: 2156 cc
• Valve Configuration: DOHC, 16 valves
• Compression ratio: 9.3:1
• Max power: 166 hp (119 kW) @ 6000 rpm
• Max torque: 150 ft·lbf (200 N m) @ 5000 rpm