Hi guys, I wanted to share our result of the X3 N55 on our Maha Dyno, it's extremely precise.
We haven't got the chance to test the 335i F30 (working on the 328i right now) but the engine is the same:
OEM:
Claimed data:
Horsepower 306,2 @ 5800 rpm
Torque Nm 400 @ 1300 rpm
Actual data:
Horsepower 314,8 Hp @ 5945 rpm
Torque 409,6 Nm @ 2850 rpm
With a full exhaust system (downpipe, cat, centre silencer, quad exhaust)
Horsepower 335 Hp @ 6085 rpm
Torque Nm 432,5 @ 3395 rpm
For comparison an E92 335i twin turbo on the same dyno:
OEM
Claimed data:
Horsepower 306 Hp @ 5800 rpm
Torque 400 Nm @ 1300-5000 rpm
Actual data:
Horsepower 323,4 Hp @ 5580 rpm
Torque 422,8 Nm @ 3765 rpm.
With the full exhaust system (downpipes, sport cats, centre pipe, rear muffler)
Actual data:
Horsepower 347,9 Hp @ 5630 rpm
Torque 448 Nm @ 4850 rpm.
Looks like the old engine response to a full exhaust was better.