Our Methodology

Data Sources

Our remap estimates are derived from aggregated data collected from reputable tuning sources across the industry. We focus on Stage 1 remaps — the most common and conservative form of ECU tuning that requires no hardware modifications.

Conservative Estimates

All figures shown represent conservative, typical estimates. We deliberately err on the side of caution to ensure that the gains shown are realistic and achievable for most vehicles in good condition.

Suitability Score

Each engine variant receives a suitability score from 1 to 10, based on:

• Percentage gain in BHP and torque
• Engine aspiration type (turbo vs naturally aspirated)
• Balance of gains across power and torque
• Known limitations or risks for the platform

Gains Profile

Each engine is classified into one of four profiles:

• Balanced — Similar percentage gains in both BHP and torque
• Torque-focused — Greater proportional gains in torque
• Power-focused — Greater proportional gains in BHP
• Limited headroom — Modest gains available

Data Under Review

Some records are flagged as "Data under review". These are engine variants where our automated quality checks have identified potential anomalies (e.g., unusually high gains for a naturally aspirated engine). These records are still displayed but with a visible warning.

Important Disclaimer

Actual remap results depend on vehicle condition, mileage, fuel quality, ambient conditions, and the specific tuning method used. The figures on this site are estimates only and should not be taken as performance guarantees. Always consult a qualified remap professional.