We followed RAM's cold start recommendations. Per the owner’s manual, RAM recommends the use of the block heater when the temperature drops below 0°F/-17°C and mandates the block heater at temperatures below -20°F/-29°C.
Using a controlled climate chamber, our first test utilized block heat and two Banks coil heaters (1500 watts total). The Monster-Ram enabled our test truck to cold start down to -30°F/-34°C. Against RAM’s recommendations, we also attempted to cold start with the same two coil heaters and no block heat. We were able to cold start down to -20°F/-29°C.
All tests were performed with two intake air pre-heat cycles per the owner’s manual. Intake air temperature is just one factor contributing to a successful cold start. Individual results may vary. Testing is ongoing with a detailed video forthcoming.
Test Vehicle Configuration
- 2024 Ram 2500 4x4 Tradesman, dual cab short bed
- Mileage 7,8XX
- Vehicle unmodified apart from Monster-Ram
- Minimum 12-hour cold soak at specified temperature
- #1 Diesel fuel
- AMSOIL Signature Series 5W40 motor oil
- New Interstate AGM batteries with full state of charge
- New MOPAR fuel filter
- New MOPAR fuel/water separator
- New MOPAR air filter
