Ram Performance Tuning
0800 328 886
Ram 1500
Ram 1500 TRX
Ram 2500
Ram 3500
6.7L Cummins turbo diesel
5.7L HEMI V8
6.4L HEMI V8
3.0L EcoDiesel V6
If you have a specific question regarding your Ram that is not answered here, please give us a call or submit the enquiry form because we can help - we will assist you personally.
Yes - the 6.7L Cummins is one of the most robustly built diesel engines available, with proven internals that handle significant power increases well beyond Stage 1 levels. The Cummins community globally has an extensive tuning track record. We calibrate conservatively with careful EGT management to ensure the turbocharger and fuel system operate safely under sustained towing load - the conditions where NZ Ram owners actually stress their engines.
Yes - the TRX's 6.2L supercharged HEMI V8 gains 40–65kW on Stage 1, pushing it past 530–545kW. In a truck designed for performance off-road use, that's a genuine improvement. The TRX is a high-output platform with strong internals, and it handles Stage 1 tuning well within safe limits. We calibrate on NZ 98 RON and log all critical parameters - this is a prestige, high-value vehicle and we treat it accordingly.
The Cummins diesel gains 80–130Nm of torque on Stage 1, which is a transformative improvement for towing. On grades like the Desert Road, Remutaka Hill or the Lindis Pass with a 3,500kg trailer, the difference is immediately apparent - the Ram pulls in a higher gear with less effort, the exhaust brake holds speed on descents more confidently and the engine runs cooler because it's not working as hard to maintain pace. For serious towing, this is one of the best returns on investment available.
The Cummins diesel's efficiency often improves at highway speeds after tuning, because increased torque means less throttle input to maintain pace. Ram diesel owners commonly report 5–10% improvement in highway fuel consumption at cruise speeds, which on a large truck that uses fuel at rate is a meaningful saving over time. Under towing conditions at high load, economy stays similar - you're working the engine hard either way, but the improved torque means less time spent working at maximum throttle.
Improve your Ram's towing and performance with expert ECU tuning in Auckland. Contact us today for a detailed breakdown of what your Ram 1500, 2500 or 3500 can achieve.
Real Drivers, Real Results.
We're proud of the results we deliver, but don't just take our word for it. Read what our satisfied customers have to say about their experience with our professional mobile tuning service and the real-world performance gains they've enjoyed.
Auto Tune were exceptional. Their attention to detail and deep technical knowledge were evident throughout the tuning process. They managed to unlock the hidden potential of my vehicle, providing a noticeable boost in power and responsiveness. I highly recommend their services to any enthusiast.
2018 Subaru Forrester - Howick
I was thoroughly impressed with the friendly and efficient service at Auto Tune. They transformed my car’s performance while maintaining reliability, striking the perfect balance. The difference in the driving experience is night and day, and the entire team was a pleasure to deal with. I will definitely be a returning customer.
2020 Audi RS6 - Takapuna
I brought my diesel ute in looking for more pulling power, and the team at Auto Tuning absolutely delivered. The difference in low-end torque is massive; it now hauls heavy loads up hills without breaking a sweat. The biggest surprise has been the improvement in fuel economy during my daily commute. A proper, professional tune.
2021 Ford Ranger - Henderson
