Porsche 911 3.8 Bi-Turbo S 650hp Remap

The Porsche 911 3.8 Bi-Turbo S 650hp is a 3.8L turbocharged petrol engine producing 650 BHP and 800 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 740 BHP and 890 Nm — a gain of around 90 BHP (14%) and 90 Nm (11%).

This engine has moderate remap suitability, with a balanced spread of gains across both power and torque — providing a noticeable improvement across the rev range. The tuning headroom is classified as moderate, based on the percentage gain available from the factory output.

Considerations: Turbo petrol: fuel quality and cooling can influence repeatable performance.. High tuned torque: check transmission torque capacity and service history.

All figures shown are typical estimates based on aggregated Stage 1 data for this engine variant. Actual results depend on vehicle condition, mileage, and the chosen tuning method. We recommend discussing your specific vehicle with a qualified remap professional.