Stellantis eBoost Air Targets Faster Turbo Response

On August 6, Stellantis eBoost Air was revealed by the company’s SRT performance division as a new powertrain concept demonstrated on a prototype 3.0-liter Hurricane high-output inline-six engine. The system is designed to allow larger turbochargers to deliver strong low-end performance while reducing the delay normally associated with turbocharger response. Positioned before the exhaust-driven turbochargers, an electrically powered e-compressor operates with an electronically controlled bypass system. When the driver demands immediate torque before the turbochargers reach their required operating speed, the bypass directs airflow through the e-compressor, rapidly increasing boost pressure and helping the turbines spool more quickly.

Once the turbochargers reach the operating condition needed to deliver the requested boost, the airflow is redirected through the conventional induction path, with the turbochargers then relying on energy from the engine’s exhaust gases. This approach is intended to create a broad and responsive power band with an immediate, linear character that more closely resembles the response associated with a supercharged V8. The eBoost Air concept also demonstrates SRT’s rapid development approach for next-generation propulsion systems. Street Racing Technologies, or SRT, operates as Stellantis’ performance innovation incubator, using advanced development methods to progress the eBoost Air concept from development work to a functioning prototype within weeks.

Frequently Asked Questions

What is Stellantis eBoost Air?
Stellantis eBoost Air is an e-compressor technology concept designed to improve turbocharger response in high-performance internal-combustion powertrains. Demonstrated on a prototype 3.0-liter Hurricane high-output inline-six engine, the system uses electronically controlled airflow management to provide additional boost before the exhaust-driven turbochargers reach their required operating speed. By helping the turbochargers spool more rapidly, the technology is intended to strengthen low-end performance and reduce turbo lag. Once sufficient turbocharger boost becomes available, the system returns airflow to the conventional induction path, allowing exhaust energy to power the turbochargers normally.

How does the eBoost Air system reduce turbo lag?
The system uses an electrically driven e-compressor positioned upstream of the exhaust-driven turbochargers. When the driver requests immediate torque and the turbochargers have not yet reached their required operating speed, an electronically controlled bypass directs airflow through the e-compressor. This rapidly builds boost pressure and helps accelerate the turbochargers toward their operating range. After the turbochargers can supply the required boost, the bypass changes the airflow route back to the normal induction path. This allows the system to combine rapid initial response with conventional exhaust-powered turbocharging during sustained operation.