Kalmar’s Electric Conversion of the 964-Generation 911

Danish tuning company Kalmar has announced a project to convert the 964-generation Porsche 911 into an electric vehicle (EV). Named the “7-97 E-Volt,” this EV conversion utilizes the powertrain from a Tesla Model S.
Kalmar’s goal was not just to install Tesla’s powertrain into the 911, but to enhance both the car’s environmental performance and its driving dynamics. The result is the 7-97 E-Volt.

Thorough Weight Reduction and Aerodynamic Improvements

The project began with a 964-generation 911 donor car stripped of its engine. Kalmar restored the car using as many original parts as possible. What’s truly remarkable is their dedication to the process—they even melted down and recast the car’s aluminum components. The same process was applied to the glass.
The most impressive aspect is the creation of a new lightweight body made from flax-based composite materials. This material is also used inside the cabin to further reduce weight. According to Kalmar, the 7-97 E-Volt weighs approximately 1,374 kg, comparable to the original 964 Turbo model.

Enhanced Aerodynamics

By using glued-in glass to eliminate gaps and the new body design, aerodynamic efficiency has improved while maintaining downforce. Kalmar reports a 30% increase in front downforce and 20% at the rear compared to the donor 911. Adding the optional ducktail spoiler boosts rear downforce by an additional 60%.

Photo by Kalmar

Tesla-Derived Powertrain

The heart of this EV conversion is the powertrain. A single electric motor mounted on the rear axle delivers up to 450 horsepower, powered by a 63 kWh battery split between front and rear packs to optimize weight distribution.
Performance figures include a 0-100 km/h sprint in under 4 seconds and a maximum range of approximately 290 km (180 miles). Drivers can select between Eco and Sport modes via a drive mode selector.

Modern features include electric power steering, air conditioning, LED headlights, rain-sensing wipers, and an infotainment system compatible with Apple CarPlay. To operate power steering, air conditioning, and the brake booster, an electric vacuum pump has been added. Brake options include iron rotors or lighter carbon-ceramic discs.

Photo by Kalmar

The conversion price for the 7-97 E-Volt starts at 450,000 euros (around 70 million yen). Kalmar also highlights a welcome feature: the conversion is reversible, allowing future owners to revert to the internal combustion engine if they wish.

This project represents a bold attempt to blend modern technology with classic car charm without compromising either. Kalmar’s ambitious approach, aiming to balance environmental responsibility with performance, opens new possibilities for the classic car world. For Porsche enthusiasts, this initiative is a noteworthy project that could influence the future of classic Porsches.