B Series Engine Specifications

Civic
Type-R 98
(E-EK9)

Civic
SiR
(E-EK4)

Del-Sol CRX
(E-EG2)

Integra
Type-R 96/US
(JDM E-DC2/E-DB8)

Integra
Type-R 98
(JDM E-DC2/E-DB8)

Integra
SiR-G
SiR-II

Integra
GSR
(USA, E-DC2/E-DB8)

Civic/CRX
91 SiR
(E-EF8/E-EF9)

C

Engine

B16B
98 Spec-R

B16A6

B16A3/A4

B18C
96 Spec-R

B18C
98 Spec-R

B18C

B18C1

B16A

B16A

Displacement

1595

1595

1595

1797

1797

1797

1797

1595

1595

C.R.

10.8:1

10.4:1

10.4:1

11.1:1

11.1:1

10.6:1

10.0:1

10.2:1

10.4:1

Output
Power (ps/rpm)

185/8200

170/7800

170/7800
160/7800
(US Del-Sol)

200/8100

200/8100

180/7600

170/7600
(US GSR)

160/7600

170/7800

Torque (kgm/rpm)

16.3/7600

16.0/7300

16.0/7300

18.5/7500

18.5/7500

17.8/6200

17.8/6200

15.8/7300

16.0/7300

Detailed Engine Specs

Connecting rod bearing width

tetra-methyl lead coated crank
17.5 mm

19.5 mm

19.5 mm

tetra-methyl lead coated crank
17.5 mm

tetra-methyl lead coated crank
17.5 mm

tetra-methyl lead coated crank
17.5 mm

tetra-methyl lead coated crank
17.5 mm

19.5 mm

19.5 mm

Connecting
rod

high chrome carbon steel

chrome
carbon steel

chrome
carbon steel

high chrome carbon steel

high chrome carbon steel

high chrome carbon steel

high chrome carbon steel

chrome
carbon steel

chrome
carbon steel

Piston

Molybdenum coated low friction

Molybdenum coated low friction

Molybdenum coated low friction

Block Height

270mm

263mm

263mm

270mm

270mm

270mm

270mm

263mm

263mm

Valve Specs(note that Honda measures valve timing/lift at 1mm of lift)

Intake
(VTEC lobe)

open

close

valve lift

diameter

18� before TDC
45� after BDC
11.5 mm
33 mm

10� before TDC
40� after BDC
10.6 mm
33 mm

10� before TDC
40� after BDC
10.6 mm
33 mm

15� before TDC
45� after BDC
11.5 mm
33 mm

10� before TDC
40� after BDC
10.6 mm
33 mm

10� before TDC
40� after BDC
10.6 mm
33 mm

10� before TDC
40� after BDC
10.6 mm
33 mm

10� before TDC
40� after BDC
10.1 mm
33 mm

10� before TDC
40� after BDC
10.6 mm
33 mm

Exhaust
(VTEC lobe)

open

close

valve lift

diameter

45� before BDC
10� after TDC
10.5 mm
28 mm

40� before BDC
7� after TDC
9.4 mm
28 mm

40� before BDC
7� after TDC
9.4 mm
28 mm

45� before BDC
10� after TDC
10.5 mm
28 mm

40� before BDC
7� after TDC
9.4 mm
28 mm

40� before BDC
7� after TDC
9.4 mm
28 mm

40� before BDC
7� after TDC
9.4 mm
28 mm

40� before BDC
7� after TDC
9.0 mm
28 mm

40� before BDC
7� after TDC
9.4 mm
28

Weight (kg)

1050

1120

1100

1060

1100

1130

1040

1090

Engine	JDM B16A G1 (USA B16A3)	JDM B16A G2	JDM B16A G3	JDM B16B 98 spec.R	USA B17A	USA B18C	USA B18C spec.R	JDM B18C 96 spec.R
Type	Water-cooled 4 stroke	Same	Same	Same	Same	Same	Same	Same
Cylinder Arrangement	Inline 4 cylinder, transverse	Same	Same	Same	Same	Same	Same	Same
Block Height **	263 mm (10.354")	Same	Same	270 mm	Same?!	270 mm (10.630")	Same	Same
Bore x Stroke	81.0 x 77.4 mm (3.19 x 3.05 in)	Same	Same	Same	81.0 x 81.4 mm (3.19 x 3.20 in)	81.0 x 87.2 mm (3.19 x 3.43 in)	Same	Same
Displacement	1595 cc (97.3 cid)	Same	Same	Same	1678 cc (102.4 cid)	1797 cc (109.6 cid)	Same	Same
Compression Ratio	10.2	10.4	10.4	10.8	9.7	10.0	10.6	11.1
Valve Train	Belt driven, DOHC w/VTEC, 16 valves	Same	Same	Same	Same	Same	Same	Same
Maxinum Output	160 ps @ 7600 rpm	170 ps @ 7800 rpm	170 ps @ 7800 rpm	185 ps @ 8200 rpm	160 hp @ 7600 rpm	170 hp @ 7600 rpm	195 hp @ 8000 rpm	200 ps @ 8000 rpm
Maxinum Torque	111 lbs-ft @ 7000 rpm (15.5 kgm @ 7000)	16.0 kgm @ 7300 rpm	16.0 @ 7300 rpm	16.3 kgm @ 7500 rpm	117 lbs-ft @ 7000 rpm	128 lbs-ft @ 6200 rpm	130 lbs-ft @ 7500 rpm	18.5 kgm @ 7500 rpm
Specific Output (output/liter)	100 ps/liter	106.3 ps/liter	106.3 ps/liter	115.6 ps/liter	94.1 hp/liter	94.4 hp/liter	108.3 hp/liter	111.1 ps/liter
Engine	JDM B16A G1 (USA B16A3)	JDM B16A G2	JDM B16A G3	JDM B16B 98 spec.R	USA B17A	USA B18C	USA B18C spec.R	JDM B18C 96 spec.R
Intake/Exhaust Valve Size	33.0 mm/28 mm	Same	Same	Same	Same	Same	Same	Same
Intake opening (BTDC)	10	15	15	18	10	10	15	15
Intake closing (ABDC)	40	45	45	45	40	40	45	45
Intake duration	230	240	240	243	230	230	240	240
Exhaust opening (BBDC)	40	40	40	45	40	40	45	45
Exhaust closing (ATDC)	7	7	7	10	7	7	10	10
Exhaust duration	227	227	227	235	227	227	235	235
Overlap	17	22	22	28	17	17	25	25
Intake valve lift (mm)	10.6 (.417")	10.7 (.421")	10.7 (.421")	11.5 (.453")	10.6 (.417")	10.6 (.417")	11.5 (.453")	11.5 (.453")
Exhaust valve lift (mm)	9.4 (.370")	9.4 (.370")	9.4 (.370")	10.5 (.413")	9.4 (.370")	9.4 (.370")	10.5 (.413")	10.5 (.413")
Intake/Exhaust Valve Springs	Dual/Single	Dual/Single	Dual/Single	Dual/Dual	Dual/Single	Dual/Single	Dual/Dual	Dual/Dual

Engines stroke/rod/sizes

B16A:
Rod length: 134 mm
Stroke: 77 mm
R/S: 1.74:1
Displacement: 1587.12 cc

B17A:
rod length: 131.87 mm
Stroke: 81.4 mm
R/S: 1.62:1
Displacement: 1677.81 cc

B18A-B,B20B-Z:
Rod length: 137mm
Stroke: 89mm
R/S: 1.54:1
Displacement: 1834.47 cc

B18C:
Rod length: 137.9 mm
Stroke: 87.2 mm
R/S: 1.58:1
Displacement: 1797.36 cc

B20A:
Rod length: 141.7-142.75 mm
Stroke: 95 mm
R/S: 1.49-1.50:1
Displacement: 1958.14-2056.03 cc

..................................................................................................................................................................

Engine-Piston	B16A-PR3	B16A-P30 (JDM)	B17A1-P61	B18C1 P72-A0 (US)	B18C1 P72-00 (JDM)	B18C5-P73-A0 (US)	B18C5-P73-00 (JDM)	B16B-PCT (JDM)	B18B
Compression Ratio	10.2	10.4	9.7	10.0	10.6	10.6	11.1	10.8	NA

Approximate Compression Ratio for Engine-Piston Mixes

Engine	Piston
	B16B or Civic Type-R	P73 (US) Integra Type-R	P73 (Japan Spec) Integra Type-R
B16A	11.1	10.4	10.7
B17A	11.4	10.6	10.8
B18C w/GSR Head	11.8	10.9	11.4
B18C w/Type-R or B16 Head	11.6	10.6	11.1

Approximate Piston Measurements

Engine-Piston

B16A-PR3

B16B-PCTX

B17-P61

B18B-PR4

B18C-P72

B18C5-P73

B20B

H22A1

Rod Length

5.290

NA

5.208

5.394

5.429

5.429

NA

5.63

Stroke

3.031

NA

3.205

3.504

3.433

3.433

NA

3.571

Bore Size

3.189 (81mm)

3.189 (81mm)

3.189 (81mm)

3.189 (81mm)

3.189 (81mm)

3.189 (81mm)

3.307 (84mm)

3.425

Head C.C.

42.7

42.7

42.7

45

41.6

42.7

53.8

Compression Height

1.180"

1.210"

NA

1.180"

1.183"

1.190"

1.165"

NA

Dome Height

.098"

.253"

NA

-.055"

.000"

.070"

-.035"

NA

Weight

299g

327g

NA

280g

305g

310g

312g

NA

Honda B DOHC Piston Measurements

Engine &
Piston Stamp

Compression
Height

Dome
Height

Weight
(grams)

Bore
Size

B16A PR3

1.180"

0.098"

299

3.188" (81.0 mm)

B16B PCTX

1.210"

0.253"

327

3.188" (81.0 mm)

B17A P61

B18B PR4

1.180"

-0.055"

280

3.188" (81.0 mm)

B18C P72

1.183"

0.000"

305

3.188" (81.0 mm)

B18C5 P73

1.190"

0.070"

310

3.188" (81.0 mm)

B20B

1.165"

-0.035"

312

3.307" (84.0 mm)

back

Engine-Piston	B16A-PR3	B16B-PCTX	B17-P61	B18B-PR4	B18C-P72	B18C5-P73	B20B	H22A1
Rod Length	5.290	NA	5.208	5.394	5.429	5.429	NA	5.63
Stroke	3.031	NA	3.205	3.504	3.433	3.433	NA	3.571
Bore Size	3.189 (81mm)	3.189 (81mm)	3.189 (81mm)	3.189 (81mm)	3.189 (81mm)	3.189 (81mm)	3.307 (84mm)	3.425
Head C.C.	42.7	42.7	42.7	45	41.6	42.7		53.8
Compression Height	1.180"	1.210"	NA	1.180"	1.183"	1.190"	1.165"	NA
Dome Height	.098"	.253"	NA	-.055"	.000"	.070"	-.035"	NA
Weight	299g	327g	NA	280g	305g	310g	312g	NA

Engine & Piston Stamp	Compression Height	Dome Height	Weight (grams)	Bore Size
B16A PR3	1.180"	0.098"	299	3.188" (81.0 mm)
B16B PCTX	1.210"	0.253"	327	3.188" (81.0 mm)
B17A P61
B18B PR4	1.180"	-0.055"	280	3.188" (81.0 mm)
B18C P72	1.183"	0.000"	305	3.188" (81.0 mm)
B18C5 P73	1.190"	0.070"	310	3.188" (81.0 mm)
B20B	1.165"	-0.035"	312	3.307" (84.0 mm)