Honda B engine - AbsoluteAstronomy.com

The Honda B-series are inline-4 DOHC automotive engines. They were made in 1.6, 1.7, 1.8, and 2.0 liter variants, with and without VTEC

VTEC

VTEC is a valvetrain system developed by Honda to improve the volumetric efficiency of a four-stroke internal combustion engine. The VTEC system uses two camshaft profiles and electronically selects between the profiles. It was invented by Honda R&D engineer Ikuo Kajitani, and was the first system...

(Variable Valve Timing and Electronic Lift Control). Later models have minor upgrades including modifications to the intake valves and ports and piston tops, along with individual cylinder oil injectors (B18C models). They produce between 150 hp and 200 hp, with some models capable of a redline

Redline

Redline refers to the maximum engine speed at which an internal combustion engine or traction motor and its components are designed to operate without causing damage to the components themselves or other parts of the engine...

over 8,500 rpm.

The Honda B-series was replaced by the K-series

Honda K engine

The Honda K series engine is a four-cylinder four-stroke engine introduced in 2001. The K series engines are equipped with DOHC valvetrains and use roller rockers to reduce friction. The engines use a coil-on-plug, distributorless ignition system with a coil for each spark plug...

in Civic and Integra applications.

JDM B16A (First Generation)

The first VTEC engine.
Note: All Honda Motor B16A engines are stamped 'B16A' (with no number after the "A" to identify version).
Except in Europe, there it was stamped 'B16A1'.

B16A found in:
1989-1991 JDM Acura Integra XSi\RSi" (DA6/DA8)
1989-1991 JDM Honda CRX SiR (EF8)
1989-1991 JDM Honda Civic
Honda Civic
The Honda Civic is a line of subcompact and subsequently compact cars made and manufactured by Honda. The Civic, along with the Accord and Prelude, comprised Honda's vehicles sold in North America until the 1990s, when the model lineup was expanded...

SiR (EF9)
- - Displacement: 1595 cc 1.6 litre
  - Compression: 10.2:1
  - Bore: 81 mm (3.2 in)
  - Stroke: 77.4 mm (3 in)
  - Rod Length: 134 mm (5.3 in)
  - Rod/stroke ratio: 1.745
  - Power: 160 PS @ 7,600 rpm & 15.5 kgm @ 7,000 rpm
  - Redline: 8100 rpm
  - Transmission: S1/J1/Y1 (4.4 final drive), YS1 (4.266 final drive, cable clutch, optional LSD)
  - ECU code: PR3 (DA6/DA8/EF8), PW0 (EF8/EF9/DA6)
  - OBD0

JDM B16A (Second Generation)

Found in:
1992 JDM Acura Integra "XSi" (DA6)
1991-1994 JDM Honda Civic
Honda Civic
The Honda Civic is a line of subcompact and subsequently compact cars made and manufactured by Honda. The Civic, along with the Accord and Prelude, comprised Honda's vehicles sold in North America until the 1990s, when the model lineup was expanded...

Sir/SiRII (EG6)
1991-1993 JDM Honda Civic Ferio SiR (EG9)
1992-1995 JDM Honda CRX Delsol SiR (EG2)
1996-1998 JDM Honda Civic
Honda Civic
The Honda Civic is a line of subcompact and subsequently compact cars made and manufactured by Honda. The Civic, along with the Accord and Prelude, comprised Honda's vehicles sold in North America until the 1990s, when the model lineup was expanded...

Sir/SiRII (EK4)
1995-1998 JDM Honda Civic Ferio Si (EK4)
- - Displacement: 1595 cc 1.6 liter
  - Compression: 10.4:1
  - Bore: 81 mm (3.2 in)
  - Stroke: 77.4 mm (3 in)
  - Rod Length: 134 mm (5.3 in)
  - Rod/stroke ratio: 1.745
  - Power: MT: 170 PS (168 HP) @ 7,800 rpm & 16 kgm @ 7,300 rpm
  - VTEC engagement: 5800 rpm
  - Redline: 8200 rpm (AT: 7700 rpm )
  - Transmission: YS1/S4C/Y21/S21 (4.4 final drive, optional LSD)
  - ECU code: P30 (EG2/EG6/EG9)
  - OBD1

B16B (Type R)

VTEC
VTEC
VTEC is a valvetrain system developed by Honda to improve the volumetric efficiency of a four-stroke internal combustion engine. The VTEC system uses two camshaft profiles and electronically selects between the profiles. It was invented by Honda R&D engineer Ikuo Kajitani, and was the first system...
Found in:
- 1997-2000 JDM Civic Type R
  Honda Civic Type R
  The first Civic to receive the 'Type R' name was based on the 6th generation 'EK' Civic. The contributing base model was the JDM Civic 3 door hatchback called SiR, code named EK4...
  
  [EK9]
  - Displacement: 1595 cc
  - Compression: 10.8:1
  - Bore: 81 mm (3.2 in)
  - Stroke: 77.4 mm (3 in)
  - Rod/Stroke ratio: 1.84:1
  - Rod Length: 142.42 mm (5.6 in)
  - Power: 185 PS180 HP @ 8200 rpm & 118 lbft @ 7500 rpm
  - Redline: 8400 rpm
  - Rev-limit: 8900 rpm
  - Transmission:S4C With Helical LSD (4.4 final drive, dual-synchromesh on 2nd, 3rd and 4th gears)
  - VTEC engagement @ 6200 rpm
  - ECU code: PCT
  - OBD-2A

Note: This engine uses the same block as the Integra Type R (B18CR), which is taller than the B16a block (by approx 17mm), but with a crank the same stroke as the b16a. It uses longer rods to accommodate for this, which is why the Rod/Stroke ratio is higher than a standard B16.

http://www.civictyper.org/ek9civic.html

B16A1

VTEC
VTEC
VTEC is a valvetrain system developed by Honda to improve the volumetric efficiency of a four-stroke internal combustion engine. The VTEC system uses two camshaft profiles and electronically selects between the profiles. It was invented by Honda R&D engineer Ikuo Kajitani, and was the first system...
Found in:
- European Market Civic'1.6i-VT'(EE8)(EE9)
  - Displacement: 1.6 liter (1595)
  - Bore×Stroke: 81.0×77.4 mm (3.19×3.05 in)
  - Compression: 10.2:1
  - Power:150 hp (110 kW) @ 7600 rpm
  - Torque: 106 lbft @ 7100 rpm
  - Redline: 8100 rpm
  - VTEC engagement @ 5200 rpm
  - Transmission: Y2

- - OBD0
  - OBD1(92-93)

B16A2

VTEC
VTEC
VTEC is a valvetrain system developed by Honda to improve the volumetric efficiency of a four-stroke internal combustion engine. The VTEC system uses two camshaft profiles and electronically selects between the profiles. It was invented by Honda R&D engineer Ikuo Kajitani, and was the first system...

Found in:

- 1992-2000 Honda Civic
  Honda Civic
  The Honda Civic is a line of subcompact and subsequently compact cars made and manufactured by Honda. The Civic, along with the Accord and Prelude, comprised Honda's vehicles sold in North America until the 1990s, when the model lineup was expanded...
  
  EDM VTisi (EG6/EG9 & EK4)
- 1992-1997 Honda CR-X del Sol
  Honda CR-X del Sol
  The Honda Civic CRX del Sol is a 2-seater front-engined, front wheel drive, targa top convertible manufactured by Honda in the 1990s. Based on the crx platform, the del Sol was the successor to the popular Honda CR-X...
  
  EDM VTi (EG)
- 1996-1997 Honda CR-X del Sol
  Honda CR-X del Sol
  The Honda Civic CRX del Sol is a 2-seater front-engined, front wheel drive, targa top convertible manufactured by Honda in the 1990s. Based on the crx platform, the del Sol was the successor to the popular Honda CR-X...
  
  USDM "VTEC"
- 1999-2000 Honda Civic
  Honda Civic
  The Honda Civic is a line of subcompact and subsequently compact cars made and manufactured by Honda. The Civic, along with the Accord and Prelude, comprised Honda's vehicles sold in North America until the 1990s, when the model lineup was expanded...
  
  USDM Si (EM1)
- 1999-2000 Honda Civic
  Honda Civic
  The Honda Civic is a line of subcompact and subsequently compact cars made and manufactured by Honda. The Civic, along with the Accord and Prelude, comprised Honda's vehicles sold in North America until the 1990s, when the model lineup was expanded...
  
  CAN SiR (EM1)
- Displacement: 1595 cc
  - Bore×Stroke: 81.0×77.4 mm (3.19×3.05 in)
  - Compression: 10.2:1
  - Power: 160 hp @ 7600 rpm & 111 lbft @ 7000 rpm
  - Transmission: Y21 or S4C
  - Redline: 8,000 rpm
  - Rev Limit: 8,450 rpm
  - VTEC Engagement: 5,600 rpm
  - Aluminum Casting
  - ECU Code: JDM P2T (square case) or USDM P30 (regular case)
  - OBD2

B16A3

VTEC
Found in:
1994-1995 Del Sol VTEC
Displacement 1,595 cc (97.3 cu in)
Power (bhp@rpm): 160 hp (120 kW) @ 7,600 rpm & 118 ft·lbf (160 N·m) @ 7,500 rpm
Transmission: Y21

B16A4

VTEC
Found in:
1996-2000 Honda Civic SiRII (Asian version) (EK4)
Displacement: 1,595 cc (97.3 cu in)
Compression: 10.4:1
Power: 174 hp (127 kW) @ 7800 rpm & 116 ft·lbf (157 N·m) @ 7300 rpm
Redline: 8200 rpm
Transmission: Y21

B16A6

VTEC
Found in:
1996-2000 Honda Civic – Middle East & South Africa VTEC (EK)
Displacement: 1,595 cc (97.3 cu in)
Compression: 10.2:1
Power: 158 hp (118 kW) @ 7600 rpm & 111 ft·lbf (151 N·m) @ 7000 rpm
Transmission: S4C

B17A1*

VTEC
VTEC
VTEC is a valvetrain system developed by Honda to improve the volumetric efficiency of a four-stroke internal combustion engine. The VTEC system uses two camshaft profiles and electronically selects between the profiles. It was invented by Honda R&D engineer Ikuo Kajitani, and was the first system...
Found in:
- 1992-1993 Integra
  Honda Integra
  The Honda Integra is a compact luxury performance coupe made by Honda during the years 1985 to 2006. The sporty front wheel drive car is able to house five passengers with a two door hatch or four door sedan available.The Integra was on Car and Driver magazine's annual Ten Best list six times, in...
  
  GS-R (USDM Vtec Model Vin DB2)
  - Displacement: 1678 cc
  - Bore: 81 mm (3.189 in)
  - Stroke: 81.4 mm (3.205 in)
  - Rod/Stroke Ratio: 1.63
  - Rod Length: 132.28 mm (5.208 in)
  - Compression: 9.7:1
  - VTEC engagement @ 5600 rpm
  - Power: 160 hp @ 7600 rpm & 117 ft·lbf (159 N·m) @ 7000 rpm
  - Came equipped with the YS1 cable trans, which was different than other cable B-series transmissions as it has a different input shaft.

B18A

The B18A is not considered part of the modern B-series family. This engine shares many characteristics with the B20A/B21 See Honda B20A engine

Honda B20A engine

Partially unrelated to the Honda B-series engines are the B20A and B21A. By some , these are not considered to be part of the B-series group of engines because they are not compatible with most of the other B-series parts and all of the other B series chassis.There were 2 versions of the B20A* The...

Found in:
- 1986-1989 Accord Aerodeck LXR-S/LX-S (Japan)
- 1986-1989 Accord EXL-S/EX-S (Japan)
- 1986-1989 Vigor MXL-S (Japan)
  - Displacement: 1834 cc
  - Compression: 9.4:1
  - Bore: 81 mm (3.2 in)
  - Stroke: 89 mm (3.5 in)
  - Dual Keihin Carbs
  - Power: 100 hp @ 6100 rpm & 128 lbft @ 4700 rpm
  - Transmission: A2N5, E2N5

B18A1

NON -VTEC
VTEC
VTEC is a valvetrain system developed by Honda to improve the volumetric efficiency of a four-stroke internal combustion engine. The VTEC system uses two camshaft profiles and electronically selects between the profiles. It was invented by Honda R&D engineer Ikuo Kajitani, and was the first system...
Found in:
- 1990-1993 Acura Integra USDM "RS/LS/GS" (DA9 Coupe, DB1 Sedan)
  - Displacement: 1834 cc
  - Compression: 9.2:1
  - Bore: 81 mm (3.2 in)
  - Stroke: 89 mm (3.5 in)
  - Rod Length: 137.01 mm (5.394")
  - Rod/Stroke Ratio: 1.54
  - Redline: 6500 rpm
  - Rev Limiter: 6700 rpm
  - Programmed fuel injection
  - Power: 90-91 Only: 132 bhp @ 6000 rpm & 121 ft.lbf @ 5000 rpm
  - Power: 92-93 Only: 140 bhp @ 6300 rpm & 130 ft.lbf @ 5000 rpm
  - Transmission: 90-91: A1,S1, cable
  - Transmission: 92-93: YS1, cable

B18B1

NON-VTEC
VTEC
VTEC is a valvetrain system developed by Honda to improve the volumetric efficiency of a four-stroke internal combustion engine. The VTEC system uses two camshaft profiles and electronically selects between the profiles. It was invented by Honda R&D engineer Ikuo Kajitani, and was the first system...
Found in:
- 1994-2001 Acura Integra "RS/LS/GS/SE" (DC4/DB7)
- 1992-1996 JDM Honda Domani (MA5)
- 1993-1994 JDM Honda Inta (DB7)
- 1996-1999 JDM Honda Orthia (EL1)
  - Displacement: 1834 cc
  - Compression: 9.2:1
  - Bore: 81 mm (3.2 in)
  - Stroke: 89 mm (3.5 in)
  - Rod Length: 137.01 mm (5.394")
  - Rod/Stroke Ratio: 1.54
  - Power: 142 hp @ 6300 rpm & 130 ft.lbf @ 5200 rpm
  - Redline: 6800 rpm (7200 rpm on JDM Domani)
  - Rev Limit: 7200 rpm
  - Transmission: Y80/S80
  - JDM version is marked B18B on the block without any number.
  - JDM version has a compression 9.4:1 where the usdm version is 9.2:1.
  - JDM version has a higher compression ratio which results in higher hp and tq levels than the usdm version.

JDM B18C Type R

Type R

VTEC
VTEC
VTEC is a valvetrain system developed by Honda to improve the volumetric efficiency of a four-stroke internal combustion engine. The VTEC system uses two camshaft profiles and electronically selects between the profiles. It was invented by Honda R&D engineer Ikuo Kajitani, and was the first system...
Found in:
- 95-00 JDM Honda Integra Type R DC2
- 95-00 JDM Honda Integra Type R DB8
  - Rev-limit: 8700 rpm
  - Power: 200 PS or 200 SAE HP @ 8000 rpm & 18.5 kg/m @ 7500rpm (96 spec) 19 kg/m @ 6200 rpm (98 spec)

http://www.honda.co.jp/factbook/auto/INTEGRA/19950824/in95-003.html

- - Transmission: S80 with Helical LSD
  - S80 spec: J4D (96 Spec: 4.4 final drive), N3E (98 Spec: 4.785 final drive w/ 1.034 4th & .787 5th Gears)
  - Displacement: 1797 cc
  - Compression: 11.1:1
  - Bore: 81 mm (3.2 in)
  - Stroke: 87.2 mm (3.4 in)
  - Rod Length: 137.9 mm (5.4 in)
  - Rod/Stroke Ratio: 1.58
  - VTEC Engagement @ 5700 rpm
  - ECU code: P73-003 (96specR) P73-013 (98specR)

(Source: Honda.co.jp/factbook)

JDM B18C

SiR/GSR

VTEC
VTEC
VTEC is a valvetrain system developed by Honda to improve the volumetric efficiency of a four-stroke internal combustion engine. The VTEC system uses two camshaft profiles and electronically selects between the profiles. It was invented by Honda R&D engineer Ikuo Kajitani, and was the first system...
Found in:
- 95-98 JDM Honda Integra SiR/SiR II (DB8, DC2)
- 98-99 JDM Honda Integra SiR-G (DB8, DC2)
  - Identification: Black valve cover with dual runner intake manifold
  - Red Line: 8200 rpm
  - Rev-Limit: 8484 rpm- 8550 rpm (*For some only, most newer model SIR/SIR-G cut off at 8254rpm)
  - Power: 132.39 kW @ 7200 rpm & 128 ft.lbf @ 6200 rpm
  - Displacement: 1797 cc
  - Compression: 10.6:1
  - Bore: 81 mm (3.2 in)
  - Stroke: 87.2 mm (3.4 in)
  - ECU code: P72
  - VTEC Engagement @ 4500 rpm
  - Transmission S80 (with optional LSD)

Highlights of B18C Spec R compared to standard B18C1 GSR and B18C4 VTi

1. Camshaft - Wide-angled, high-lift, high-duration, high-durability camshaft

2. Exhaust Valve Spring - High-lift, dual-layered spring

3. Spark plug - High-heat-type #7 platinum plug

4. Engine Stiffener - Aluminum die-cast, high-durability, one-piece type

5. Crankshaft - Full-counterweight, 8-weight, high-output, custom crankshaft

6. Connecting Rod - Custom TypeR rod, high-durability, lightened

7. Pistons - High-compression, low-friction, custom pistons

8. Inlet Valves - Lightened inlet valves

9. Intake Manifold - Custom tuning, single-port type.

10. Throttle Body - 62 mm (2.4 in) wide-mouth throttle body.

11. Inlet Valve Springs - High-lift, flat-surfaced, dual-layered spring

12. Port Buffing done by hand. For 98 Spec port buffing is done by machine

13. Fastening of Connecting Rod done with micrometer.

14. 98 Spec engine has stainless steel 4-1 exhaust manifold to increase torque

USDM B18C1

VTEC
VTEC
VTEC is a valvetrain system developed by Honda to improve the volumetric efficiency of a four-stroke internal combustion engine. The VTEC system uses two camshaft profiles and electronically selects between the profiles. It was invented by Honda R&D engineer Ikuo Kajitani, and was the first system...
Found in:
- 1994-2001 USDM Integra GS-R (DC2/DB8)
  - Displacement: 1797 cc
  - Compression: 10.0:1
  - Bore: 81 mm (3.2 in)
  - Stroke: 87.2 mm (3.4 in)
  - Rod Length: 137.9 mm (5.4 in)
  - Rod/Stroke Ratio: 1.58
  - Power: 170 hp @ 7600 rpm
  - Torque: 128 lbft @ 6200 rpm
  - Redline: 8100 rpm (Fuel cut-off @ 8200 rpm)
  - VTEC Engagement @ 4400 rpm
  - VCIS Engagement @ 6000 rpm
  - Transmission: Y80(No LSD) 5-Speed Manual Transaxle

B18C3

VTEC
VTEC
VTEC is a valvetrain system developed by Honda to improve the volumetric efficiency of a four-stroke internal combustion engine. The VTEC system uses two camshaft profiles and electronically selects between the profiles. It was invented by Honda R&D engineer Ikuo Kajitani, and was the first system...
Found in:
- 1995-1998 ACURA Integra Type R
Power: 197 PS @ 8200 rpm

B18C4

VTEC
VTEC
VTEC is a valvetrain system developed by Honda to improve the volumetric efficiency of a four-stroke internal combustion engine. The VTEC system uses two camshaft profiles and electronically selects between the profiles. It was invented by Honda R&D engineer Ikuo Kajitani, and was the first system...
Found in:
- 1996-2000 UK Civic

.8i VTi 5-door Hatch (MB6)

- 1996-2000 UK Civic 1.8i VTi-S (Limited Edition) 5-door Hatch (MB6)
- 1996-2000 UK Civic Aerodeck 1.8i VTi 5-door Wagon (MC2)
- 1998-1999 EU Civic Aerodeck 1.8i VTi 5-door Wagon (MC2)
- 1998-1999 EU Civic 1.8i VTi 5-door Hatch (MB6)
Displacement: 1797 cc
VTEC engagement@5,900 rpm
IAB open@5,750 rpm
Compression: 10.0:1
Power: 169 hp @ 7600 rpm & 128 lbft @ 6200 rpm
Limit: 8,600 rpm
Transmission: S9B 4.26 final drive TORSEN LSD.

B18C5

VTEC
VTEC
VTEC is a valvetrain system developed by Honda to improve the volumetric efficiency of a four-stroke internal combustion engine. The VTEC system uses two camshaft profiles and electronically selects between the profiles. It was invented by Honda R&D engineer Ikuo Kajitani, and was the first system...
Found in: USDM DC2 Acura Integra Type-R (Integra Type-R)
- 1997-2001 Integra
  Honda Integra
  The Honda Integra is a compact luxury performance coupe made by Honda during the years 1985 to 2006. The sporty front wheel drive car is able to house five passengers with a two door hatch or four door sedan available.The Integra was on Car and Driver magazine's annual Ten Best list six times, in...
  
  Type-R (Note:1999 model CDM only)

Displacement: 1797 cc
Compression: 10.6:1
Bore: 81 mm (3.2 in)
Stroke: 87.2 mm (3.4 in)
Rod Length: 137.9 mm (5.4 in)
Rod/Stroke Ratio: 1.58
Power: 190 hp @ 7800 rpm & 131 ft.lbf @ 7300 rpm
Redline: 8400 rpm (Fuel cut-off @ 8500 rpm)
VTEC Engagement @ 5,700 rpm
Transmission: S80 w/LSD

B18C6

VTEC
VTEC
VTEC is a valvetrain system developed by Honda to improve the volumetric efficiency of a four-stroke internal combustion engine. The VTEC system uses two camshaft profiles and electronically selects between the profiles. It was invented by Honda R&D engineer Ikuo Kajitani, and was the first system...
Found in:
- 1998-2001 Honda Integra
  Honda Integra
  The Honda Integra is a compact luxury performance coupe made by Honda during the years 1985 to 2006. The sporty front wheel drive car is able to house five passengers with a two door hatch or four door sedan available.The Integra was on Car and Driver magazine's annual Ten Best list six times, in...
  
  UK and Euro Spec Type R
Type: 1.8 litre 16v DOHC 4 cylinder in-line
Displacement: 1797 cc
Compression: 11.1:1
Air intake diameter: 62 mm (2.4 in)
Bore: 81 mm (3.2 in)
Stroke: 87.2 mm (3.4 in)
Rod Length: 137.9 mm (5.4 in)
Rod/Stroke Ratio: 1.58
Power: 190HP (140 kW) @ 7900 rpm & 131 lbft @ 7300 rpm
Redline: 8400 rpm
Rev-limiter: 8700 rpm
VTEC engagement: 5900 rpm
Transmission: S80 w/LSD

B18C7

VTEC
VTEC
VTEC is a valvetrain system developed by Honda to improve the volumetric efficiency of a four-stroke internal combustion engine. The VTEC system uses two camshaft profiles and electronically selects between the profiles. It was invented by Honda R&D engineer Ikuo Kajitani, and was the first system...
Found in:
- 1999 - 2001 Honda Integra
  Honda Integra
  The Honda Integra is a compact luxury performance coupe made by Honda during the years 1985 to 2006. The sporty front wheel drive car is able to house five passengers with a two door hatch or four door sedan available.The Integra was on Car and Driver magazine's annual Ten Best list six times, in...
  
  Type R (Australia)
Power: 190 PS @ 8200 rpm & 127 lbft @ 7500 rpm

B20B

1996-1998 specs
NON-VTEC
VTEC
VTEC is a valvetrain system developed by Honda to improve the volumetric efficiency of a four-stroke internal combustion engine. The VTEC system uses two camshaft profiles and electronically selects between the profiles. It was invented by Honda R&D engineer Ikuo Kajitani, and was the first system...
Found in: USDM and JDM Honda CR-V, JDM Orthia, Stepwgn, S-MX
Displacement: 1973 cc
Power: 126 hp) @ 5400 rpm
Torque: 133 ft.lbf @ 4300 rpm
Rod length: 137 mm (5.4 in)
Compression: 8.8:1 or 9.2:1
Bore: 84 mm (3.3 in)
Stroke: 89 mm (3.5 in)
Redline: 6300 rpm

B20B/B20Z

1999 - 2001 specs
NON-VTEC
VTEC
VTEC is a valvetrain system developed by Honda to improve the volumetric efficiency of a four-stroke internal combustion engine. The VTEC system uses two camshaft profiles and electronically selects between the profiles. It was invented by Honda R&D engineer Ikuo Kajitani, and was the first system...
Found in: USDM CRV as a B20Z, CR-V and Honda Orthia as a B20B
Displacement: 1973 cc
Power: 147 hp @ 6200 rpm
Torque: 133 lbft @ 4800 rpm
Rod length: 137 mm (5.4 in)
Compression: 9.6:1
Bore: 84 mm (3.3 in)
Stroke: 89 mm (3.5 in)
Redline: 6900 rpm

B20A/B21A

The B20A3 and B20A5 are the predecessor to the B family. All B-series engines were based from the B20A, but most engine components are not compatible. For more information, refer to the F1-series Honda race car that used a B20A engine. Also see Honda B20A engine

Honda B20A engine

B Series Transmissions

Note: All (1992 up, non prelude)"Big Spline" B series Transmissions are interchangeable.
YS1 casing can take S80 Internals or a hydraulic conversion kit can be used to operate hydraulic transmissions in cable operated models however a1/s1/j1/y1 internals do not swap into the later model YS1 or hydraulic casings due to different shaft diameters.

J1/S1

Found in: Integra XSI/RSI (DA6) Civic sir (EF9) Crx sir (EF8)
Type: Cable
1st: 3.25
2nd: 2.052
3rd: 1.416
4th: 1.103
5th: 0.906
R: 3.000

FD: 4.400

A1/S1/YS1

Found in: 1990-93 USDM Integra LS/RS/GS (DA)
Type:cable
1st: 3.230
2nd: 1.901
3rd: 1.269
4th: 0.966
5th: 0.742
R: 3.000

FD: S1/YS1 4.266
FD: A1 4.400

Y1

Found in: CRX/Civic (optional LSD)
Type: Cable
1st: 3.166
2nd: 2.052
3rd: 1.416
4th: 1.102
5th: 0.870
R: 3.000

FD: 4.266

YS1

Found in: Integra 92-93 XSI/RSI (DA6, DA9)
Type: Cable
1st: 3.307
2nd: 2.999
3rd: 1.458
4th: 1.107
5th: 0.880
R: 3.000

FD: 4.400

S80

Found in: Integra Type R 98+ (LSD)
Type: Hydraulic
1st: 3.231
2nd: 2.105
3rd: 1.458
4th: 1.034
5th: 0.787
R: 3.000

FD: 4.785

S9B

Found in: EDM UKDM MB6 (LSD) Helical LSD (same as S80)
Type: Hydraulic
1st: 3.230
2nd: 1.900
3rd: 1.360
4th: 1.034
5th: 0.848
R: 3.000

FD: 4.267

Y21/Y80/S80/S4C

Found in:
- JDM 96-97 Integra R(LSD)
- JDM Civic R [EK9](LSD)
- JDM Civic SiR [EK4, EG6]
- JDM CR-X DEL SOL SIR (EG2)(optional LSD)
- USDM DEL SOL VTEC (EG2)(OPTIONAL LSD)
Type: Hydraulic
1st: 3.230
2nd: 2.105
3rd: 1.458
4th: 1.107
5th: 0.848
R: 3.000

FD: 4.400

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