KEIHIN ECU Remapping with WinOLS – Advanced Petrol Map Editing (Honda Civic 1.5T)

Detailed Explanation of KEIHIN Map Groups

Driver Wish Map

Purpose: Pedal → torque request
Units: Nm
Axes: Pedal %, RPM

Remap Method: Increase mid-pedal torque slope
Safe Limit: +10–15%
Effect: Faster throttle response
Risk: Driveline shock

Torque Limiter Maps

Purpose: Max allowed torque
Units: Nm
Axes: RPM / Gear

Remap Method: Raise limit above driver wish
Safe Limit: +15%
Effect: Allows higher boost
Risk: Clutch slip

Boost Target Map

Purpose: Requested turbo pressure
Units: mbar absolute
Axes: RPM / Load

Remap Method: Increase high-load cells
Safe Limit: +150–200 mbar
Effect: More airflow & power
Risk: Turbo overspeed

Wastegate Duty Map

Purpose: Turbo actuator control
Units: %
Axes: RPM / Load

Remap Method: Adjust to reach new boost
Safe Limit: +10%
Effect: Stable boost control
Risk: Boost oscillation

Lambda Target Map

Purpose: AFR command
Units: Lambda
Axes: RPM / Load

Remap Method: Slight enrichment under boost
Safe Limit: 0.78–0.82 λ
Effect: Knock safety
Risk: Fuel economy loss

Ignition Timing Map

Purpose: Spark advance
Units: Degrees BTDC
Axes: RPM / Load

Remap Method: Advance mid-load region
Safe Limit: +2–3°
Effect: More torque
Risk: Knock

Knock Sensitivity Maps

Purpose: Knock correction threshold
Units: Gain factor
Axes: RPM / Load

Remap Method: Slight reduction
Safe Limit: −5%
Effect: Less timing pull
Risk: Engine knock

Fuel Enrichment Maps

Purpose: Extra fuel under boost
Units: Multiplier
Axes: RPM / Load

Remap Method: Increase at high boost
Safe Limit: +5–8%
Effect: EGT control
Risk: Excess fuel

Axes Explanation in KEIHIN ECU

Most KEIHIN petrol maps use:

• Engine speed axis (RPM)
• Load or cylinder air mass
• Pedal position
• Calculated torque

Understanding axis scaling is essential because KEIHIN often stores axes in non-linear Honda-specific formats.

Remap Strategy Order (Schiller Method)

1. Driver Wish
2. Torque Limiters
3. Boost Target
4. Wastegate
5. Lambda
6. Ignition
7. Knock
8. Fuel

This ensures torque model consistency and safe turbo operation.

Safe Petrol Tuning Limits – Honda 1.5T

• Boost: +0.15–0.2 bar
• Torque: +15%
• Ignition: +2–3°
• Lambda: 0.78–0.82

These limits maintain stock turbo and piston safety.

Effects of Map Changes on Engine

More Boost: power ↑ EGT ↑ turbo stress ↑
More Ignition: torque ↑ knock risk ↑
Richer Lambda: temp ↓ fuel use ↑
Higher Torque: accel ↑ drivetrain load ↑

Complete WinOLS KEIHIN Tuning Guide

Professional KEIHIN tuning requires coordinated editing of torque, boost, fuel, and ignition maps. In our WinOLS training, we teach Honda petrol remapping using real calibration logic and tested Schiller Tuning calculations for safe and reliable performance gains.

Professional Support & Schiller Tuning

Schiller Tuning provides expert KEIHIN Honda ECU remapping training, verified WinOLS map packs, and professional online support. Our proven tuning methodology ensures safe turbo petrol performance with maximum reliability.