Expected gains of +20 BHP and +21 Nm torque
Get Your Free Quote ↓Considering an ECU remap for your Jeep Grand Cherokee 6.1 Hemi V8 420hp? A Stage 1 remap can take this 2005 - 2011 petrol engine from 420 BHP to 440 BHP and from 569 Nm to 590 Nm of torque (naturally aspirated). This engine scores 3/10 for remap suitability. Get a free personalised quote from a trusted remap professional and find out exactly what your Jeep Grand Cherokee can achieve.
The Jeep Grand Cherokee 6.1 Hemi V8 420hp is a 6.1L naturally aspirated petrol engine producing 420 BHP and 569 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 440 BHP and 590 Nm — a gain of around 20 BHP (5%) and 21 Nm (4%).
This engine has low remap suitability, though the available headroom is limited, so gains are modest compared to higher-output variants. The tuning headroom is classified as limited, based on the percentage gain available from the factory output.
Considerations: Naturally aspirated engine: gains are usually limited; results vary widely.. High tuned torque: check transmission torque capacity and service history.
All figures shown are typical estimates based on aggregated Stage 1 data for this engine variant. Actual results depend on vehicle condition, mileage, and the chosen tuning method. We recommend discussing your specific vehicle with a qualified remap professional.
| Engine | BHP | Gain | Torque | Gain | Score |
|---|---|---|---|---|---|
| 3.0 CRD 211hp | 211 → 265 | +54 | 510 → 600 |
| +90 |
| Good (7.5/10) |
| 3.7 V6 215hp | 215 → 235 | +20 | 319 → 340 | +21 | Moderate (4/10) |
| 3.0 CRD 218hp | 218 → 265 | +47 | 510 → 600 | +90 | Good (6.5/10) |
| 4.7 V8 230hp | 230 → 250 | +20 | 400 → 420 | +20 | Limited (3.5/10) |
| 4.7 V8 305hp | 305 → 325 | +20 | 453 → 475 | +22 | Limited (3.5/10) |
| 5.7 Hemi V8 325hp | 325 → 345 | +20 | 500 → 520 | +20 | Limited (3.5/10) |
| 5.7 Hemi V8 357hp | 357 → 375 | +18 | 527 → 545 | +18 | Limited (3/10) |
Get a personalised remap quote for your Jeep Grand Cherokee. We'll connect you with a trusted professional in your area.
All figures shown are typical estimates based on aggregated Stage 1 data for this engine variant. Actual results depend on vehicle condition, mileage, and the chosen tuning method.
We recommend discussing your specific vehicle with a qualified remap professional before proceeding.