Honda B engine

The B-series are a family of inline four-cylinder DOHC automotive engines introduced by Honda in 1988. Sold concurrently with the D-series which were primarily SOHC engines designed for more economical applications, the B-series were a performance option featuring dual overhead cams along with the first application of Honda's VTEC (Variable Valve Timing and Lift Electronic Control) system in certain models, high-pressure die cast aluminum block, cast-in quadruple-Siamese iron liners.

To identify a Honda B-series engine, the letter B is normally followed by two numbers to designate the displacement of the engine, another letter, and in US-spec engines, another number. The Japanese spec-engines are normally designated with a four character alphanumeric designation.

The Honda B16 has appeared in six different forms over the years.

The Honda B-series was replaced by the K-series in Civic, Integra, Odyssey, and CR-V applications.

B16

B16A (First generation)

thumb|First generation of the B16A engine

The first VTEC engine.

B16A found in:
1989-1993 Honda Integra XSi
1989-1991 Honda CRX SiR (EF8)
1989-1991 Honda Civic SiR (EF9)
Displacement:
Compression: 10.2:1
Bore x Stroke:
Rod Length:
Rod/stroke ratio: 1.745
Power: at 7600 rpm & at 7000 rpm
RPM:
VTEC engagement: 4500 rpm
Redline: 8000 rpm
Rev Limit: 8200 rpm
Transmission: S1/J1/YS1 (4.4 final drive, cable clutch, optional LSD for YS1), Y1 (4.266 final drive, cable clutch, optional LSD)
ECU code: P-fk1 (DA6/DA8/EF8), PW0 (EF8/EF9/DA6), PR3 (EF8/EF9) OBD0

B16A1

thumb|B16A1 engine

VTEC
Found in:
CRX 1.6 DOHC VTEC (EE8) - European market
Civic 1.6 DOHC VTEC (EE9) - European market
Displacement:
Bore×Stroke:
Compression: at 10.2:1
Power: at 7600 rpm
Torque: at 7100 rpm
RPM:
VTEC engagement: 5200 rpm
Redline: 8000 rpm
Rev Limit: 8200 rpm
Transmission: Y2
OBD0
ECU CODE: PW0

B16A2

thumb|B16A2 engine

DOHC VTEC
Found in:
1992-2000 Honda Civic EDM VTi (EG6/EG9 & EK4)
1992-1997 Honda Civic del Sol EDM VTi (EG)
1996-1997 Honda Civic del Sol VTEC USDM (EG2)
1996-1998 Honda Civic AUDM & NZDM Vti-R (EK4)
1999-2000 Honda Civic AUDM Vti-R (EM1)
1999-2000 Honda Civic USDM Si (EM1)
1996–2000 Honda Civic – Middle East & South Africa VTEC (SO3, SO4)
1999-2000 Honda Civic SiR Philippines (EK4 Sedan)
1999-2000 Honda Civic CDM SiR (EM1)
Displacement:
Bore×Stroke:
Power: at 7600 rpm & at 6500 rpm
Compression: 10.2:1
RPM:
VTEC engagement: 5600 rpm
Redline: 8000 rpm
Rev Limit: 8200 rpm
Transmission: Y21, S4C
Bore x Stroke:
Rod Length:
Rod/Stroke Ratio: 1.58
Power: at 7800 rpm & at 7500 rpm
Redline: 8400 rpm (Fuel cut-off at 9000 rpm)
VTEC engagement: 5700 rpm
Transmission: S80 w/LSD

B18C6 (Type R)<span class="anchor" id="B18C6"></span>

DOHC VTEC
Found in:
1998–2001 Honda Integra UKDM/EUDM Type R
Displacement:
Compression: 11.1:1
Air intake diameter:
Bore:
Rod Length:
Rod/Stroke Ratio: 1.58
Power: at 7900 rpm & at 7300 rpm
Redline: 8400 rpm
Rev Limit: 8600 rpm
VTEC engagement: 5900 rpm
Transmission: S80 w/LSD
ECU code: 37820-P73-G01

B18C7 (Type R)<span class="anchor" id="B18C7"></span>

DOHC VTEC
Found in:
1999-2001 Honda Integra AUDM/NZDM Type R
Displacement:
Compression: 11.1:1
Air intake diameter:
Bore x Stroke:
Rod Length:
Rod/Stroke Ratio: 1.58
Power: at 8200 rpm & at 7500 rpm
Redline: 8400 rpm
Rev Limit: 8800 rpm
VTEC engagement: 5800 rpm

B20

B20B-B20B4

1996–1998 specs
non-VTEC
Found in: USDM and JDM Honda CR-V, JDM Orthia, Stepwgn, S-MX
Displacement:
Power: at 5400 rpm
Torque: at 4800 rpm
Rod length:
Compression: B20B4 (AO PISTONS) 8.8:1 (P8R) or 9.2:1 (P75)
Bore x Stroke:
Redline: 6500 rpm
No Knock Sensor
Low Compression engine

B20B

1999 - 2001 specs

Non VTEC

Found in: USDM CR-V as a B20B8, CR-V and Honda Orthia as a B20B
Displacement:
Power: at 6200 rpm
Torque: at 5500 rpm
Rod length:
Compression: 9.4:1 (P8R)-9.6:1 (P75)
Bore x Stroke:
Head Cylinder : P75-5
Redline: 6800 rpm

B20Z2

1999 - 2001 specs

Non-VTEC

Found in: USDM CR-V as a B20Z2, CR-V and Honda Orthia as a B20B
Displacement:
Power: at 6200 rpm
Torque: at 5500 rpm
Rod length:
Compression: 9.4:1 (P8R)-9.6:1 (P75)
Bore x Stroke:
Redline: 6800 rpm
Some came with limited production head P8R which had 33mm intake valves (normally found on VTEC B-series) vs 31mm intake (non VTEC B series), and the head had an 84mm shrouding vs 81mm for all other B series heads. They also had a thinner head gasket which yielded a higher compression ratio vs the normal B20B of 9.2:1.

B20B JDM

1995–1997 spec
Non-VTEC
Found in: JDM Honda Orthia, CR-V
Displacement:
Power: at 6200 rpm
Torque: at 5200 rpm [4500 rpm 2.0 GX-S]
Rod length:
Compression: 9.2:1
Bore x stroke:
Redline: 6700 rpm
Rev Limit: 7300 rpm
1998-2002 specs
Non-VTEC
Displacement:
Power: at 6300 rpm
Torque: at 4500 rpm
Rod length:
Compression: 9.6:1
Bore x stroke:
Redline: 6500 rpm
Rev Limit: 7200 rpm
Some came with limited production head P8R which had 33mm intake valves (normally found on VTEC B-series) vs 31mm intake (non VTEC B series), and the head had an 84mm shrouding vs 81mm for all other B series heads.
Source http://www.honda.co.jp/auto-archive/

B20A/B20B

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 F3-series Honda race car that used a B20A engine. Also see Honda B20A engine.

References

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B16