B20 TECH |
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| B20B | B20Z | B18B (ref.) | B16A1 (pr3) | |
| Available | 97-98 | 99-00 | 94+ | 90-91 (JDM) |
| HP | 126 @ 5400 | 146 @ 6200 | 142 @ 6300 | 160 @ 7600 |
| Torque (ft-lbs) | 133 @ 4300 | 133 @ 4500 | 127 @ 5200 | 111 @ 7000 |
| Ecu redline | 6200 | 6700 | 6800 | 8100 |
| compression ratio | 8.8 | 9.6 | 9.2 | 10.2 |
| Cams in/ex | B20B / 9.70mm | B20Z (+.3mm) / B20Z | 10.03mm / 9.70mm |
10.6mm / 9.4mm |
| Valves | 31mm intake, 28mm ex | 31mm intake, 28mm ex | 31mm intake, 28mm ex | 33mm intake, 28mm ex |
| Cyl Bore | 84mm | 84mm | 81mm | 81mm |
| Stroke | 89.0mm | 89.0mm | 89.0mm | 77.4mm |
| Vin code | V=1997, W=1998 | X=1999, Y=2000 |
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I have seen B20B4s, B20B3s, and B20Z2s. Don't worry about the last number, focus on the letter, B or Z. Chassis code: Visual ID: B20B Characterized by the tall intake manifold. aka the tunnel ram, or the giraffe
B20B vs 94+ LS intake manifold.
B20Z
Intake manifold is low and more LS like. What is that thing on top? 
The idea is that the "resonator" chamber works like long runners and a larger plenum
when the pressure waves travel back up the intake from the ports.
Compared to the giraffe manifold this gives good top end and good midrange grunt.
This probably fills in the low-midrange hole we see on a B20 using an LS manifold
(see dyno).
There is probably a performance draw back to this system in the upper 6k+ rpm range,
otherwise wouldn't see this box on the ITR manifold also? Knock Sensor The B20Z comes with a knock sensor. B20B has no knock sensor.  B20B Pistons A slight dish shape on the piston. Be careful, the intake valve reliefs are not sufficient in size for a VTEC head. 
 B20Z Pistons Almost a flat top piston. Again, the intake valve reliefs are not sufficient in size for a VTEC head. 
 B20B/Z Head The B20B/Z head looks to be the same as a B18B (P75) head. The combustion chamber bore is 81mm, while the block and head gasket are 84mm. 
Stock B20 exhaust manifolds look like an extreme case of cost cutting.
Constructed of two pieces of stamped steel and quickly splatter-welded together. Throw it out right away. So far it seems that any B series exhaust manifold fits, such as a B18C or B16A. Also, the JDM Honda ITR 4-1 fits well.
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| part | part number | comment |
| B20B block ass. | 10002-p3f-a00 | w/ 8.8CR pistons, rods. crank |
| B20Z block ass. | 10002-p3f-a01 | w/ 9.6CR pistons, rods. crank |
| bare block w/mains | 11000-p3f-010 | with main caps, no crank,rods,pistons |
| head gasket | 12251-p8r-004 | also use for VTEC head |
| B20B intake cam | 14111-p3f-a01 | |
| B20B exhaust cam | 14121-p75-a00 | LS p/n |
| B20Z intake cam | 14111-phk-000 | .3mm more lift than b20b intake |
| B20B exhaust cam | 14121-phk-a00 |
different lobe center than b20b ex |
| B20B/Z valve springs in | 14761-pr4-003/004 |
LS p/n, 003=Nippon, 004=Chijo |
| B20B/Z valve springs ex | 14762-P75-A00 | LS p/n |
| B20B piston | 13010-p3f-a00 | standard bore,13020 is +.25mm |
| B20B ring | 13011-p3f-003 | standard bore, 13021 is +.25mm |
| B20Z piston | 13010-phk-000 | standard bore,13020 is +.25mm |
| B20Z ring | 13011-phk-003 | standard bore,13021 is +.25mm |
| rod comp | 13210-pr4-a00 | all CRV, LS p/n |
| crank | 13310-pr4-a00 | all CRV, LS p/n |
| rod bolt | 13204-pe1-003 | weak, buy ARP |
| rod nut | 13205-634-010 | |
| oil pump | 15100-p72-A01 | Same as GSR, and ITR |
| water pump | 19200-P75-003 | LS |
| Tensioner | 14510-p30-003 | should be same as LS |
| Timing belt | 14400-p7j-004 | should be same as LS |
| B20B spark plug | ZFR5F-11 | NGK |
| B20Z spark plug | ZFR6f-11 | NGK |
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(C) 1996, 1997, 1998, 1999, 2000 HYBRID Comments? Suggestions? Feedback? Send e-mail to: HYBRID editors |
