04-08 Series 3 3800 tuned ecm

Custom ECM Tune for 2004–2008 GM 3800 Engines

Unlock the full potential of your 2004–2008 GM 3800 engine with a custom ECM tune designed for race, off-road, and demolition derby applications. This calibration removes factory limitations while improving performance, throttle response, and reliability in stripped-down builds.

The tune optimizes engine operation while eliminating unnecessary factory systems that are not needed in race or derby environments.

Features

⚡ Precise Timing Adjustments
Optimized ignition timing tables for improved performance and throttle response.

⛽ Optimized Fueling
Fuel maps calibrated to support stronger performance and improved drivability.

🔥 Increased Rev Limiter
Extends the usable powerband for better acceleration.

🌡️ Modified Temperature Parameters
Cooling system thresholds adjusted to allow the engine to run hotter without triggering factory protections.

🧹 Unnecessary Sensors Eliminated
Removes emissions-related diagnostics and unnecessary sensors for simplified setups.

🔐 Security / VATS Removed
Factory anti-theft system completely disabled.

Installation Notes

This tuning is compatible with the stock wiring harness, but the following modifications are required:

• Install a push-button start

• Hotwire the fuel pump

For demolition derby applications, it is also recommended to hotwire the transmission for improved reliability during competition.

Important

• Off-road use only

• Not intended for emissions-controlled or street-driven vehicles