Just bought a G15 840d xDrive. Beautiful car but wondering if anyone has tuned the B57 engine in this chassis? Stock is 340hp which is already good but more is always better.
Also interested in exhaust options. The stock exhaust is very quiet for a car this size.
I had my G15 840d tuned stage 1. Its the B57D30S0 engine, 320hp stock. After remap its making 380hp and about 740nm torque. The car was already fast but now its properly rapid. The 8 series is heavy though so dont expect sports car acceleration - its more of a fast GT cruiser.
The B57 in the 840d responds really well to tuning. Same engine family as the 530d/730d but with the twin-turbo setup. Stage 1 is very safe on these. Make sure your tuner adjusts the ZF 8HP torque limits too, otherwise the gearbox will limit the extra torque.
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