BMW M4 Tuning – Faster than the AMG V8 C-Class

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The M4 is a relatively new model for BMW, albeit heavily based on the M3, being a sleeker coupe version of the car. It boasts 317 kW (431 hp) and 550 Nm (406 lb-ft) as stock and a compact body that provides lots of fun while driving. However, it falls short of its main competitor – the C63 AMG – even the one from its era, let alone the new one. But there is a way to deal with that. ZIP Tuning has three tuning packages for the BMW M4 tuning project. The first one, consisting of software tweaks alone, gives 369 kW (502 hp) and 653 Nm (482 lb-ft) of torque; the second one introduces some new hardware and adds up to 384 kW (522 hp) and 723 Nm (533 lb-ft) of torque, while the top shelf is reserved for the Stage 3 with a new custom turbo resulting in the total of 424 kW (577 hp) and 783 Nm (578 lb-ft) of torque and leaving the mighty AMG V8 far behind.

2014 was the year when the BMW M3 lineup changed a bit. The M3 name became reserved for the sedan only, while the coupe version became known as the M4. And it was just that – a new name for the coupe version, and that was it. However, its superb design and a powerful 3 l six-cylinder S55.3.027 engine with two turbochargers providing 317 kW (431 hp) and 550 Nm (406 lb-ft) of torque made it an instant hit. In all honesty, it seems that the M4 is set to become one of those legends that were not among the most powerful cars of their era but somehow remained beloved and more enduring than any of them. Remember the M3 E30? That’s what we have in mind.

And 317 kW (431 hp) is by no means minor. The RWD car reaches 62 mph in just 4.2 s and flies to the electronically limited 250 km/h; the optional M Performance pack nudges the limiter to 280 km/h. Moreover, the car is so well set up and responsive that it rockets from 80 km/h to 120 km/h in just 3.5 seconds – as fast as the Ferrari 575 Maranello.

However, aside from utter fun, competitiveness is why people buy such a car. And what is more important for a BMW M than beating a Mercedes AMG? Well, this is where the M4 falls behind. The most powerful version of the competing C-Class is the C63 AMG, and its 4 l V8 chunks out 350 kW (476 hp) or 375 kW (510 hp) in the S version, both of which are more powerful than the M4 and reaching 62 mph 0.1 s and 0.2 s faster, respectively. However, the M4 has the potential to outdo both versions of the C63 AMG with a bit of ZIP tuning.

ZIP Tuning Stage 1 BMW M4 Tuning

Adding 52 kW (71 hp) and 103 Nm (76 lb-ft) turned out to be available from stock parts. However, modern cars have lots of software, so fine-tuning the Bosch MEDV17.2 OEM ECU was enough to provide 369 kW (502 hp) and 653 Nm (482 lb-ft) of torque. This was achieved using a three-step process. The first step is adjusting the turbo pressure to feed more air to the combustion chambers. The increased air brings more oxygen to the cylinders and oxygen burns.

BMW M4 tuning stage 1 dyno

However, oxygen doesn’t burn by itself, but it needs petrol. The air-fuel ratio must be perfect to ensure good combustion, so adding more petrol is necessary.

Lastly, changing the ignition timing by sending the spark sooner gives three benefits. First of all, it improves combustion. This means that fuel efficiency is at higher levels. Lastly, setting the ignition time earlier significantly improves throttle response, and this is something you can’t fail to notice behind the wheel.

As a stock, the BMW M4 could already go well over 250 km/h. Removing the speed limiter lets it fly as fast as the new power rating allows.

All of the changes are completely safe since the ZIP engineers provide the remap that carefully follows the original software architecture, never exceeding the safety limits stated by the manufacturer.

The ZIP Stage 1 makes the BMW M4 noticeably more potent than the Mercedes C63 AMG, but still a step behind the C63 AMG S in terms of power, although the M4’s acceleration to 62 mph drops a notch under 4 seconds. Stage 2 fixes the power lack.

Stage 2 BMW M4 Tuning

The ZIP Stage 2 BMW M4 tuning gives 384 kW (522 hp) and 723 Nm (533 lb-ft) of torque. This power boost comes from two new parts. The first is an air filter by Burger Motorsport, while the second is at the other and of the internal combustion cycle. In addition, it is a new exhaust supplied by one of three popular companies: Super Sprint, Akrapovic, or Milltek.

BMW M4 tuning stage 2 dyno

The software is adjusted again to make the new parts feel at home. The upgrade gives the M4 more power than the C63 AMG S, and from that moment on, it is the most powerful car in its class. However, some might feel that the 20 hp margin may not be enough. And they would be right. This is why we have stage 3.

Stage 3 BMW M4 Tuning

The Stage 3 BMW M4 remap adds just one thing – but a major one. A bigger turbo. This upgrade also requires software mods, but all this is very much worth it. The result is 424 kW (577 hp) and 783 Nm (578 lb-ft) of torque, making the ZIP Stage 3 BMW M4 a whole class above the revered C63 AMG S.

BMW M4 tuning stage 3 dyno

This is massive, especially in a car of this size and with such a dynamic chassis. You’ve probably missed that the Stage 3 BMW M4 tuning results in 34% more power in what was already damn fast as a stock car.

Furthermore, even Stage 1 leaves more hardcore versions of the M4 far behind. For example, the 2017 BMW M4 CS, with 460 hp, is a mid-step between the stock M4 and the beastly BMW M4 GTS. That one is rated at 500 hp, while our Stage 1 BMW M4 tuning of the regular BMW M4 is already rated at 502 hp. Stage 3 puts it in a whole different class!

BMW M4 tuning

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