Description
Custom Supercharged ECM Tune for 1998–2005 GM 3800 Series II
Built specifically for supercharged 3800 setups, this custom ECM tune is designed to maximize performance, responsiveness, and reliability—whether you’re chasing horsepower or building a derby-ready monster.
This calibration removes factory limitations and optimizes the engine for boosted performance and high-demand environments.
What’s Included
⚡ Boost-Optimized Timing Tables
Calibrated spark timing designed to handle boost safely while maintaining aggressive performance.
⛽ Enhanced Fueling Strategy
Fuel tables optimized to support increased airflow and supercharger demand.
🔥 Raised Rev Limiter
Expands the usable powerband for better acceleration and performance.
🌡️ Modified Temperature Thresholds
Allows the engine to run hotter without triggering factory limp-mode protections.
🧹 Unnecessary Sensors & Diagnostics Removed
Eliminates unneeded factory systems for a simplified race setup.
🔐 Security / VATS Disabled
Factory anti-theft system completely removed.
🚫 Reduced Torque Management
Improves throttle response and allows the engine to hit harder under load.
Compatibility Notes
This ECM tune is compatible with a stock 3800 wiring harness, but the following modifications are required:
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Push-button start
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Hotwired fuel pump
For demolition derby applications, it is also strongly recommended to hotwire the transmission.
Recommended Setup
For the cleanest and easiest installation, pair this tune with a Simplified 3800 Swap Harness designed for race and derby builds.
Important
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Off-road / competition use only
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Not intended for emissions-controlled or street-driven vehicles
