Applications Toyota 7M-GTE
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.
Toyota 7M-GTE
The last M-series turbo six. Distributor or early electronic ignition, AFM, 12-tooth-class Toyota NE. A crank-trigger conversion is the usual Race Core path.
Recommended: Race Core F7. Six sequential injectors, COP conversion, MAP, skip the AFM and the weak head-gasket OEM tune.
- Cylinders: 6
- Displacement: 2954 cc
- Firing order: 1-5-3-6-2-4
- Orientation: Cylinder 1 front (timing-belt). Supra MA70, Soarer MZ20.
Variants
| Variant | Years | Trigger | Notes |
|---|---|---|---|
| 7M-GTE | 1986–1992 | Toyota NE/G in the distributor + crank sensor on later | CT26 turbo, 8.4:1. Head-gasket sensitive to overheat and over-advance. |
Recommended pin assignment (Race Core F7)
| Pin | TunerStudio | Function |
|---|---|---|
| B5 / B13 | VR 1+ / VR 1− | Crank VR |
| 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 |
| A5 | Lowside 5 | Injector cylinder 5 |
| A6 | Lowside 6 | Injector cylinder 6 |
| 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 |
| A32 | Ign 5 | Cyl 5 logic coil |
| A31 | Ign 6 | Cyl 6 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 |
| 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
Recommended: 36-1 crank wheel + cam Hall. Factory distributor NE/G can be made to work; it is not worth it on an engine you are already pulling the head off.
Crank
| Recommended | 36-1 VR on B5/B13. |
Cam
| Sync | Hall on Digital 2, one pulse per cam rev. |
TunerStudio
| Setting | Value |
|---|---|
| Trigger / wheel type | 36-1 + cam |
| Use only rising edge | Yes on MAX992x VR (typical) |
| Invert primary | No — swap VR+ / VR− first if the gap is inverted |
| Cam as VVT input | Yes when the cam is used for sequential or VVT |
| Firing order | 1-5-3-6-2-4 |
Offset: Light on cylinder 1. The OEM ignition curve is not a target; it is how these heads lift.
Injection
High-Z ~450 cc OEM. Sequential six.
| Fuel | Return, 1:1 regulator. The OEM AFM fueling is why people think 7M cannot make power — it can, on MAP, with a gasket. |
Ignition
COP on Ign 1–6. Keep peak advance conservative until cooling and the gasket are proven.
| Dwell | 2.0–2.5 ms. |
Idle
2-wire ISC, PWM low-side.
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.