BMW 320d chiptuning results - before and after comparison

28 days ago· 21 posts

Just finished chiptuning my 2020 G20 320d (B47 engine, 190hp stock). Wanted to share detailed before and after results for anyone considering a remap on this engine. Stock numbers (measured on Maha roller dyno): - 185hp at wheels (slightly below BMW spec, normal) - 385nm torque After stage 1 ECU remap: - 238hp at wheels - 462nm torque Thats a gain of 53hp and 77nm from just a software change. No hardware modifications needed. Real world differences I noticed: - 0-100 km/h feels about 1.5 seconds faster - Highway overtaking is effortless now, 80-120 km/h in 6th gear is where the biggest improvement is - Fuel consumption stayed the same in normal driving (5.2L/100km highway) - Turbo spools slightly earlier, more responsive below 2000rpm The tune was done remotely - I received an OBD tool, read the ECU file, sent it to the tuner, and flashed the modified file back. Whole process took about 2 hours. Anyone else running a tuned B47? What numbers are you seeing?

3 352

Replies (3)

Diesel Dave

28 days ago#1

Great results! I got very similar numbers on my 320d. The B47 is one of the best engines for chiptuning because BMW left so much headroom in the stock tune. The torque increase is what you really feel in daily driving - that extra 77nm makes the car feel like a 330d.

21 posts · 0 rep

Euro Mechanic

27 days ago#2

As a mechanic, I see a lot of tuned B47 engines and they hold up very well to stage 1 power levels. The internals are the same as the 230hp 325d version, so 240hp is well within the engines design limits. Just make sure to use quality diesel fuel and change the oil every 10,000km instead of BMWs recommended 15,000km interval.

26 posts · 0 rep

G20 Gang

27 days ago#3

How was the remote tuning process? Im thinking about doing the same on my G20 320d but nervous about flashing the ECU myself. Is it straightforward or do you need technical knowledge?

16 posts · 0 rep

You need to be logged in to reply.