It’s always cool to have a car that is nearly twice as powerful as it originally is. That would impress anyone with the same vehicle. Perhaps an output equal to the ones coming from the Mercedes-AMG A45 and CLA45 would be enough.
Their new 2.0-liter turbocharged M139 is the most powerful four-cylinder engine in production today. It pumps out up to 416 horsepower in the S variant, which is high enough to entertain most newcomers to the world of performance. The folks don’t have to worry if they want more power in the future, as the engine can still get more potent than this.
Meanwhile, the Ford Focus RS is lower in performance compared to the two aforementioned AMG cars. That’s because its 2.3-liter EcoBoost engine is “only” capable of 350 horsepower. Thank goodness Mountune has come up with several helpful kits to increase grunt to 400 hp, 444 hp, and 513 hp. All the Focus RS needs to reach those figures is the m520 package. The power bump doesn’t stop here, though, as it can come close to doubling the factory figure.
Yes, you will undoubtedly change the way you look at the Focus RS when it has 684 hp at its disposal, which is a staggering 334 hp more than normal. This makes Mountune come to a conclusion that it has developed what could be the most potent four-cylinder direct-injection engine in existence. Not only the horsepower, but the torque also gets significantly boosted from 350 lb-ft to 566 lb-ft.
The mill used in this dyno test has been treated with Mountune’s MRX cylinder head and a BorgWarner EFR 8374 turbocharger, but we don’t know yet if the actual upgrade kit for the Focus RS will include these two particular parts.
It’s worth noting that there have been people questioning the reliability of the AMG’s four-cylinder engine as it squeezes too much power from its small block. The same people would likely comments on the Mountune package that almost doubles the output of a regular Focus RS. How long such an overworked powerhouse would last?
Source: Mountune | Via: Youtube