BMW M340i xDrive 3.0 B58 382bhp/387ps Dyno Test – Bluespark Tuning Box

Описание: The chip tuning box featured in this dyno test can be found here: https://bluesparkautomotive.com/bmw-m...

In our latest dyno test we have this 2021 G20 BMW M340i in for tuning and testing. After an installation of our 3 Channel Pro Petrol chip tuning box, it was up on the rollers to see what the engine could achieve.

Now we know the B58 is a very capable engine, we have already seen a lot of this on our channel, so we already know the tuning potential from this M340i. Our linked, braked 4wd dyno also suited perfectly here for BMW’s All-wheel drive xDrive system.

Another thing to note, is that these vehicles currently have locked ECU’s with no way to read or write the ECU data. This means that while traditional remapping is impossible, our tuning box can give owners the opportunity to make fantastic gains without requiring a traditional ECU flash. This has the added benefit of being traceless once removed for warranty purposes.

Dyno testing before and after shows healthy gains across the rev range, with a significant increase in power and torque, really transforming how the M340i feels to drive.

Peak power was significantly increased, as we were able to lift it from 373hp at stock, up to 441hp with the box. If you take a look at the dyno graph here 0:41 you can see how we change that curve (dotted red and blue lines). We give real consistency here, bringing that extra power in as soon as possible, whilst holding it for as long as possible throughout the rev range. Pay attention at around the 2500rpm mark, you’ll see how that extra power is brought in right down from those lower revs, and then held across that entire mid-section, adding that +68hp at its peak, really transforming how it feels out on the road.

Torque also saw some really impressive improvements. Stock figures showing slightly higher than what is claimed, producing 552Nm instead of the 500Nm claimed, but not particularly unusual to see strong stock figures here, as they can often push higher than BMW claim. At stock the engine produced 552Nm and now 745Nm with the box. If you take another look at the graph (solid lines), you can really see where we have applied those gains. Again at around the 2500rpm mark, you’ll see where those improvements really spike, adding the +193Nm extra at its peak, delivering that increase exactly where it’s needed.

For more information on tuning for your BMW, please visit: https://bluesparkautomotive.com/bmw-t...

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