Applications Honda B16
Draft. Trigger offset has not been confirmed on a running Race Core install. Pins marked TBD are unknown — do not guess them. A wrong decoder or firing order can destroy the engine.
Honda B16 / B18
B-series VTEC. Distributor on most, 24+1 / 12+1 class crank in the dizzy or a crank sensor on later. VTEC is on/off only — no VTC.
Recommended: F7 / V4 / Micro Core. Four sequential, COP conversion strongly preferred over a dizzy.
- Cylinders: 4
- Displacement: 1595 (B16) · 1797 / 1834 (B18) cc
- Firing order: 1-3-4-2
- Orientation: Cylinder 1 timing-belt end. Transverse in EK/EG/DC2.
Variants
| Variant | Years | Trigger | Notes |
|---|---|---|---|
| B16A / B16B | 1989–2000 | Distributor CAS / crank+cam | VTEC, ~1.6 L, 8,000 rpm. |
| B18C (GSR / Type R) | 1994–2001 | Same family | 1.8 VTEC. DC2 Integra. |
| B18B non-VTEC | 1994–2001 | Same | VTEC off. LS/GS. |
Recommended pin assignment (Race Core F7)
| Pin | TunerStudio | Function |
|---|---|---|
| B10 | Digital 1 | Crank Hall |
| B1 | Digital 2 | Cam Hall |
| A3 | Lowside 1 | Injector cylinder 1 |
| A15 | Lowside 2 | Injector cylinder 2 |
| A4 | Lowside 3 | Injector cylinder 3 |
| A16 | Lowside 4 | Injector cylinder 4 |
| A35 | Ign 1 | Cyl 1 logic coil |
| A34 | Ign 2 | Cyl 2 logic coil |
| A22 | Ign 3 | Cyl 3 logic coil |
| A33 | Ign 4 | Cyl 4 logic coil |
| C20 | Analog Temp 3 | CLT |
| C30 | Analog Temp 2 | IAT |
| C13 | Analog Volt 1 | MAP 0–5 V |
| C24 | Analog Volt 2 | TPS 1 |
| C34 | Knock 1 | Knock bank 1 |
| A20 | Lowside 10 | Fuel-pump relay coil |
| A21 | Lowside 12 | Main-relay coil |
| A12 | Lowside 15 | Radiator-fan relay coil |
| A1 | Highside 2 | VTEC solenoid |
| B18 | Battery Sense | Ignition-switched 12 V (5 A fuse) |
| B23 | +12 V MR | Main-relay 12 V into ECU |
| A17 A18 A24 B14 B19 B20 | Power GND | Engine block → battery − |
Trigger
A crank-trigger conversion (36-1 + cam) is the Race Core path. Factory dizzy CAS can be made to work with a Honda/24+1 decoder if the disk matches — photograph it. Do not assume K-series 12-1.
Crank
| Recommended | 36-1 Hall on Digital 1. |
Cam
| Sync | Digital 2. One pulse per cam rev. A dizzy with one window works as cam if you add a crank wheel. |
TunerStudio
| Setting | Value |
|---|---|
| Trigger / wheel type | 36-1 + cam (recommended) |
| Use only rising edge | VR: typically yes on MAX992x. Hall: as logged. |
| Invert primary | No — swap VR wires first |
| Firing order | 1-3-4-2 |
Offset: Light on cylinder 1.
- OBD1 vs OBD2 looms change the dizzy connector, not the firing order.
Injection
High-Z, sequential four. ~240–310 cc Type R.
| Fuel | Return. |
Ignition
COP Ign 1–4. A dizzy on Ign 1 needs an igniter.
| Dwell | 2.0–2.5 ms. |
Idle
2-wire IAC PWM Lowside 9.
First start
- Load the matching variant configuration in TunerStudio before the harness is live — injectors and coils stay disconnected until the decoder is confirmed.
- Fuel pump fuse out. Coils unplugged or spark outputs disabled. Crank. Open Diagnostics → composite / high-speed logger.
- Confirm crank teeth are even, the missing-tooth (or named pattern) is a single clean gap, and cam is one pulse per two crank revolutions for sequential four-stroke.
- RPM during cranking should sit in the 150–350 rpm band. 0 rpm or 12,000 rpm means the decoder is lost — polarity or wheel type, not offset.
- Lock timing to a fixed 10° (idle control off). Timing light on cylinder 1. Change trigger offset until the damper agrees with 10°.
- Recheck at ~3,000 rpm. If timing walks with RPM, it is VR polarity, a delayed Hall, or the wrong decoder — not offset.
- Enable spark. Confirm a healthy burn (timing light or plug colour) with fuel still disabled.
- Enable fuel. Prime, then crank. Catch the first idle on a rich-safe VE, then lean toward stoich at idle.
- Only then enable closed-loop idle, VVT, boost and traction. A base map is a starting point, not a dyno tune.
A base map is a starting point, not a dyno tune.