BMW M135 F70 Tuning Guide

BMW M135 F70 Tuning Guide (2024 onwards)

The BMW M135 F70, launched in 2024, has quickly caught the attention of enthusiasts due to its performance, technology, and refined driving experience. For those interested in extracting even more power, handling, and character from the car, tuning is an appealing option. However, since the M135 F70 is a very new model, it’s still in the early stages of the aftermarket tuning scene.

This guide will explore the current state of tuning for the BMW M135 F70, what options are available, and what to keep in mind if you're considering modifying your car.

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Understanding the Engine and Tuning Potential

The M135 F70 is powered by a 2.0-litre turbocharged four-cylinder engine that produces around 306 horsepower and 400 Nm of torque. For a hot hatch, these figures are impressive, but many drivers will be looking for more power or a more engaging driving experience.

As of now, much of the tuning potential for the M135 F70 is still being explored. There has been speculation on how much tuning can be done, particularly with regards to ECU remapping, as it’s unclear if the ECU on the F70 is locked like some other recent BMW models. Many early buyers will also have warranty concerns, as modifying key components could potentially void parts of the warranty. As such, it’s essential to tread carefully and consider both the long-term effects and the risks before diving into tuning.

ECU Remapping and Performance Gains

The heart of most performance tuning is the engine control unit (ECU) remap. In previous BMW models like the F40 M135i, remapping the ECU yielded significant performance gains. Typically, you could expect increases in power output of around 20-30 horsepower, depending on the type of remap.

However, since the F70 M135 is a brand-new model, it's unclear whether the ECU can be remapped easily or if it's locked down to prevent such modifications. Additionally, due to the car’s relatively new status, there are few aftermarket companies that have confirmed ECU tuning solutions for the F70 yet. As more data becomes available and tuning companies get more hands-on time with the car, it’s likely that specific remapping options will emerge.

Until the ECU remapping landscape becomes clearer, it’s worth monitoring the developments within the aftermarket scene and considering other modifications that can enhance the car's performance without altering the ECU.

Exhaust Systems and Sound

One of the easiest and most rewarding modifications for the BMW M135 F70 is upgrading the exhaust system. A performance exhaust can not only improve the car’s soundtrack but can also potentially free up a few extra horsepower. Replacing the standard exhaust with a performance system from a reputable brand can increase the engine’s efficiency, particularly at higher revs.

It’s important to remember that the M135 F70 is still a relatively quiet car, especially compared to some of its more extreme counterparts in the BMW M range. A performance exhaust, such as a cat-back or downpipe replacement, could help unleash a more aggressive note. Additionally, some performance exhausts also come with lightweight materials that can shave off a small amount of weight, further enhancing overall performance. JXL Performance recommends the brand new Remus Sport Exhaust System for BMW M135 F70

Intake and Induction Kits

An upgraded intake system is another potential area for improvement. The factory intake on the M135 F70 is designed to be efficient but, like most standard systems, it can be restrictive in terms of airflow. Aftermarket cold air intakes or induction kits could provide better airflow to the engine, helping to maximise its power potential. These modifications could also lead to better throttle response and a more aggressive intake sound, particularly under load.

However, as with the exhaust, the specific intake kits that fit the F70 M135 are still in the early stages of being tested by performance companies. In some cases, parts from the F40 M135i might fit, but it’s crucial to verify compatibility before purchasing any parts, as there may be subtle changes between the two models in terms of layout or engine configuration.

Suspension and Handling Upgrades

While the M135 F70 is already equipped with a performance-oriented suspension, some owners may want to fine-tune their car’s handling to suit their preferences. Upgrading the suspension could improve the car’s balance, responsiveness, and cornering capabilities, especially for those looking to take their M135 to a track day.

• Coilovers: Adjustable coilovers can allow for fine-tuning of the ride height and damping characteristics. This modification is particularly useful for those who want to alter the car's stance or adjust suspension stiffness for different driving conditions.
• Sway Bars: Upgraded sway bars can help reduce body roll and improve stability when cornering. This is particularly beneficial if you plan to push the car harder during spirited driving or track sessions.
• Performance Springs: For those not looking to go full-on with coilovers, performance springs could be a good middle ground. These springs lower the car slightly while improving handling and responsiveness.

Before investing in suspension modifications, it's important to make sure that the changes will work well with the car’s existing system and maintain a comfortable ride for daily driving.

Brakes and Wheels

The M135 F70 is a performance hatchback, and upgrading the brakes is often one of the first modifications that enthusiasts consider. Larger or performance-oriented brake discs, paired with upgraded pads, can improve stopping power, which is especially useful if you're planning on pushing the car harder on a track.

Wheels are another area where many owners opt for upgrades. Lightweight alloy wheels can reduce unsprung weight, improving the car’s handling and acceleration. Additionally, choosing wheels with a wider or lower offset can enhance the car’s stance and grip.

Other Considerations

• Warranty Impact: Many buyers will still be under the BMW warranty, so it’s important to weigh the risks of tuning your M135 F70. Some modifications, particularly those that involve the ECU or exhaust systems, may void parts of your warranty. Always consult with your dealer before making any modifications to ensure you’re not at risk of voiding your warranty.
• Compatibility with F40 Parts: As mentioned earlier, it’s still uncertain which parts from the F40 M135i are compatible with the F70. While both cars share similar powertrains, small differences in the design may affect compatibility. Before purchasing any aftermarket parts, check with the supplier to ensure they are tested and confirmed to fit the F70.

Conclusion

The BMW M135 F70 is a promising car for tuning enthusiasts, but with its recent release, the aftermarket scene is still developing. While performance upgrades such as ECU remaps, exhaust systems, and intake kits may offer some potential gains, the full tuning possibilities for the F70 are still being explored. In the meantime, performance enhancements in suspension, brakes, and wheels are safe modifications that can be made to improve the car’s driving experience.

If you're considering tuning your M135 F70, it's important to keep an eye on the development of aftermarket parts and solutions for this new model. Always ensure that modifications are compatible with your vehicle and consider any potential impact on your warranty.