Your Vehicle
Jeep Grand Cherokee 6.1 Hemi V8 420hp
Technical Specifications
Power and torque increase
Stage 1: software remap only, no mechanical changes, fully reversible.
Power HP
Torque Nm
Book your Stage 1 remap
499 € VAT included · pay online, the work is done at the workshop you choose
Power Graph
Jeep Grand Cherokee 6.1 Hemi V8 420hp: da 420 a 440HP
Remapping Jeep Grand Cherokee
MasterTuning is a leader in developing remapping for Jeep. La Jeep Grand Cherokee 6.1 Hemi V8 420hp può passare da 420 HP a 440 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 Jeep Grand Cherokee 6.1 Hemi V8 420hp
The Jeep Grand Cherokee 6.1 Hemi V8 420hp is equipped with a petrol engine that produces 420 HP and 569 Nm of torque in its factory configuration. With MasterTuning's professional ECU remapping, this Jeep can achieve 440 HP (+5%) and 590 Nm (+4%).
Our Stage 1 tuning for the Grand Cherokee 2005 - 2011 delivers an impressive gain of +20 HP and +21 Nm, optimizing the petrol engine's performance while maintaining reliability and staying within safe parameters.
The engine code 6.1 Hemi V8 identifies this specific powerplant configuration. The Chrysler NGC4 ECU is professionally recalibrated to unlock hidden potential while preserving engine longevity.
With 420 HP from factory, this Jeep Grand Cherokee is already a performance vehicle. Our remapping extracts even more potential, delivering exhilarating acceleration and enhanced driving dynamics for enthusiasts who demand the best.
Technical Specifications — Jeep Grand Cherokee 6.1 Hemi V8 420hp
Factory technical data for the Jeep Grand Cherokee 6.1 Hemi V8 420hp (2005 - 2011), used by MasterTuning engineers to develop a tailored, dyno-tested remap for this specific powerplant.
| Engine code | 6.1 Hemi V8 |
|---|---|
| ECU / Control unit | Chrysler NGC4 |
| Fuel | Petrol |
| Compression ratio | 10.3 |
| Bore × stroke | 103.0 X 90.9 mm |
| Stock power | 420 HP · 569 Nm |
| Remapped power (Stage 1) | 440 HP (+20) · 590 Nm (+21) |
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 Jeep Grand Cherokee.
Frequently Asked Questions - Jeep Grand Cherokee
How much power can I gain from remapping my Jeep Grand Cherokee?
With MasterTuning Stage 1, your Jeep Grand Cherokee 6.1 Hemi V8 420hp can gain +20 HP (from 420 to 440 HP) and +21 Nm of torque. This represents a 5% increase in power.
Is ECU remapping safe for the Jeep Grand Cherokee engine?
Yes, MasterTuning's remapping for the Jeep Grand Cherokee 6.1 Hemi V8 420hp is developed within safe parameters. All calibrations are tested on our 4x4 dyno and stay within the mechanical limits of the 6.1 Hemi V8 engine.
Is the Jeep ECU remapping reversible?
Absolutely. The original factory calibration of your Jeep Grand Cherokee is always backed up before remapping. The process is 100% reversible at any time.
Will remapping affect my Jeep 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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Book your remap or ask for a quote
Stage 1 can be bought online and is done at the workshop you choose; for Stage 2 we send you a quote.
Stage 2 is quoted on request: write to us and we will reply with price and timing.
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