Your Vehicle
Hummer H1 6.6 V8 305HP
Technical Specifications
Power and torque increase
Stage 1: software remap only, no mechanical changes, fully reversible.
Power HP
Torque Nm
Power Graph
Hummer H1 6.6 V8 305HP: da 305 a 325HP
Remapping Hummer H1
MasterTuning is a leader in developing remapping for Hummer. La Hummer H1 6.6 V8 305HP può passare da 305 HP a 325 HP con un incremento di 20 HP.
The development of each remap is customized by MasterTuning.
- 100% tested and customized files guarantee
- Tested and developed on a 4x4 dyno
- Best performance, within safety margins
- Reduced fuel consumption
ECU Remapping Details Hummer H1 6.6 V8 305HP
The Hummer H1 6.6 V8 305HP is equipped with a diesel engine that produces 305 HP and 820 Nm of torque in its factory configuration. With MasterTuning's professional ECU remapping, this Hummer can achieve 325 HP (+7%) and 850 Nm (+4%).
Our Stage 1 tuning for the H1 g-2006 delivers an impressive gain of +20 HP and +30 Nm, optimizing the diesel engine's performance while maintaining reliability and staying within safe parameters.
The engine code LLY identifies this specific powerplant configuration.
As a diesel engine, this Hummer responds exceptionally well to ECU tuning. Owners typically report improved throttle response, smoother power delivery, and in many cases, better fuel efficiency under normal driving conditions.
Technical Specifications — Hummer H1 6.6 V8 305HP
Factory technical data for the Hummer H1 6.6 V8 305HP (g-2006), used by MasterTuning engineers to develop a tailored, dyno-tested remap for this specific powerplant.
| Engine code | LLY |
|---|---|
| Fuel | Diesel |
| Compression ratio | 17.5 |
| Bore × stroke | 103.0 X 99.0 mm |
| Stock power | 305 HP · 820 Nm |
| Remapped power (Stage 1) | 325 HP (+20) · 850 Nm (+30) |
Don't want to touch the ECU?
Rapid Dimsport add-on modules connect to the engine sensors with original connectors: they fit in a few hours and come off without a trace, leaving the factory software untouched. Useful on a leased car, one still under warranty or one you plan to sell soon. Check which ones fit your Hummer H1.
Frequently Asked Questions - Hummer H1
How much power can I gain from remapping my Hummer H1?
With MasterTuning Stage 1, your Hummer H1 6.6 V8 305HP can gain +20 HP (from 305 to 325 HP) and +30 Nm of torque. This represents a 7% increase in power.
Is ECU remapping safe for the Hummer H1 engine?
Yes, MasterTuning's remapping for the Hummer H1 6.6 V8 305HP is developed within safe parameters. All calibrations are tested on our 4x4 dyno and stay within the mechanical limits of the LLY engine.
Is the Hummer ECU remapping reversible?
Absolutely. The original factory calibration of your Hummer H1 is always backed up before remapping. The process is 100% reversible at any time.
Will remapping affect my Hummer warranty?
ECU remapping may affect your manufacturer warranty. We recommend checking your specific warranty terms. Many of our customers choose to remap after the warranty period or accept this trade-off for the significant performance gains.
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