BMW M2C vs M4C - Dyno Data Comparison

 

The new M2 Competition has been long awaited. Rather than using the upgraded N55 engine found in the original M2, the new M2 Comp uses a detuned version of the S55 found in the F8x M3 & M4. 

We had the pleasure of a visit from a customer with an M2 Comp for tuning last week. As always we datalogged the car before and after to ensure our module was performing as desired. This also allows us to compare the principal differences between the stock M2C and M4C tunes.

As standard the M2C produced 422.7HP and 548Nm Torque. A little over the quoted BMW power figure of 410PS, but pretty much exactly matching the stock quoted torque figure of 550Nm.

BMW M2 Stock Dyno Graph

We run an M4C here at Bluespark as one of our own cars, so have tons of dyno data for comparison. As standard the M4C repeatably makes around 457hp and 576Nm torque. Again a little over BMW's quoted figures of 450PS and 550Nm.

BMW M4 CP Stock(2)

 

Exporting the dyno data for these 2 cars and comparing them we get the following comparison graph:

BMW M4 CP vs M2 CP Stock Power

 

As you can see the results from both cars are pretty similar, but the M4C makes a significant amount more power beyond 5500RPM. We analysed logs from both and noted the significant differences. The most obvious difference is the amount of boost pressure each car runs. As you can see in the following graph, boost pressure remains fairly similar up until 5500 RPM (ignoring some fluctuation from the M4C):

BMW M4 CP vs M2 CP Stock Boost

 

From 5500 RPM onward, the M4C consistently runs around 0.3 Bar more boost than the M2C. This is the biggest noticable difference between the two engines. and accounts mostly for the difference in power seen in the upper rev range.

Also worth noting is ignition timing. In the following graph you can see ignition timing compared:

BMW M4 CP vs M2 CP Stock Timing

As you can see, the M2C runs around 5 degrees more timing advance than the M4C, which makes total sense as it is running less boost.

There are a few other subtle differences between the 2 cars, but these are the biggest and most obvious. Using this data we were able to produce software for our plug in unit for the M2C, giving it back the performance taken away in BMW's detuning, plus a whole lot more on top.

Here is the original dyno graph comparing the standard M2 Comp before and after installing our tuning box:

BMW M2 CP Stock vs Bluespark Power Dyno Graph

The following graph compares the results of the Stock M4C and M2C vs the M2C with the Bluespark tuning module installed:

BMW M4 & M2 CP vs Bluespark Power Dyno Graph

 

As you can see, the M2C is now making more power than the Stock M4C right through the rev range. 

If you are interested in what we could do for your M2 Competition, please take a look at the relevant link below: 

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ID Make Model Fuel System Engine Size (cc) KW Power (PS/HP) Nm
69545 BMW M2 Competition Petrol Turbo 2979 301 409 550 Select Vehicle
69531 BMW BMW M3 3.0 431ps Petrol Turbo 2979 317 431 550 Select Vehicle
69534 BMW BMW M4 3.0 431ps Petrol Turbo 2979 317 431 550 Select Vehicle
69532 BMW BMW M3 3.0 450ps Petrol Turbo 2979 331 450 550 Select Vehicle
69535 BMW BMW M4 3.0 Competition 450ps Petrol Turbo 2979 331 450 550 Select Vehicle