YouTuber Rich Rebuilds, known for his controversial LS V8-swapped Tesla Model S, is embarking on another ambitious project: a Cummins 4BT diesel swap into a wrecked Tesla Model 3. This audacious undertaking presents significant engineering challenges, from the sheer weight and size of the Cummins engine to the fundamental differences between electric and diesel powertrains.
The Challenge of a Cummins 4BT in a Tesla Model 3
The Cummins 4BT, a 3.9-liter cast iron diesel engine, weighs approximately 750 pounds, significantly heavier than the aluminum LS V8 used in the previous Tesla swap. Its dimensions—37.7 inches tall, 30.6 inches long, and 24.6 inches wide—pose a formidable obstacle to fitting it within the Model 3’s compact frame. The stock Tesla batteries and motors, while substantial, are dwarfed by the 4BT’s bulk.
Initial mock-up of the Cummins 4BT in the Tesla Model 3 (Rich Rebuilds via YouTube)
The team is starting with a salvaged Model 3 with extensive front-end damage, focusing their initial efforts on accommodating the massive diesel engine. Fitting the 4BT under the factory hood seems impossible, suggesting a significant body modification is likely.
Side view of the planned engine placement (Rich Rebuilds via YouTube)
Power and Performance Expectations
While not known for high horsepower, the Cummins 4BT delivers substantial torque. Its stock configuration produces 150 horsepower and 265 pound-feet of torque. However, given Rich Rebuilds’ penchant for pushing boundaries, significant modifications are anticipated. A turbocharger upgrade is almost certain, along with potential fuel system and internal enhancements to boost power output considerably.
Anticipated Modifications
Beyond the core engine swap, substantial modifications are planned for the Model 3. “Brodozer” style fender flares are expected to accommodate wider wheels and tires, likely requiring custom adapters. Relocating the fuel filler neck to the current charging port location is also planned. The project’s estimated completion time is uncertain, echoing the year-long process of the V8 Model S build.
Rich Rebuilds’ previous project, a V8-swapped Tesla Model S.
A Unique and Controversial Creation
The Cummins-swapped Tesla Model 3 promises to be a unique, if not controversial, vehicle. The combination of a salvaged electric car and a robust diesel engine represents a significant departure from conventional automotive norms. This project is sure to spark debate and generate considerable interest within the automotive community.
