The 2017 BMW 750i xDrive, with its twin-turbocharged 4.4L V8 engine, is already a powerhouse. However, for those seeking to push its boundaries or customize their driving experience, there are numerous tuning options available. From full engine tunes to software modifications, here’s an in-depth guide to upgrading your BMW. Many of these mods you can do from the comfort of your home, as long as you have a laptop, proper cables, and relevant software!

1. Full Engine Tunes

Overview: Full engine tunes involve reprogramming the car’s ECU (Engine Control Unit) to optimize performance. These tunes can increase horsepower, torque, and fuel efficiency while enhancing throttle response. As every car is different and is located in different regions of the world with varying oxygen levels/availability of higher-octane fuels, a full engine tune would provide you with a tune made specifically for your car.

Dinan Stage Tunes

• Description: Dinan offers ECU tuning specifically engineered for BMWs, ensuring compatibility and reliability. Their tunes focus on maintaining factory-like drivability while increasing performance.
• What They Do: Improve horsepower and torque by optimizing fuel and ignition timing.
• Costs: $1,000-$2,000.
• Strengths: Retains BMW factory warranty when installed by authorized dealers. Reliable and extensively tested.
• Weaknesses: Conservative tuning compared to other brands. Limited customization.
• Comparison to Piggyback Systems: Safer for long-term use and warranty retention but less flexible.

CarBahn Autoworks by Steve Dinan

• Description: A spin-off from Dinan, CarBahn tunes are designed for higher performance with advanced calibration strategies.
• What They Do: Increase power while maintaining safety and reliability through precise tuning.
• Costs: $1,500-$3,000.
• Strengths: High-quality tunes with a focus on engine longevity.
• Weaknesses: Premium pricing. Limited availability compared to DIY options.
• Comparison to Piggyback Systems: Offers a more refined experience but at a higher cost.

Bootmod3

• Description: A cloud-based tuning platform allowing users to flash pre-configured or custom maps to their BMW.
• What They Do: Boosts horsepower and torque with multiple map options for different performance levels.
• Costs: $595 for the platform license + optional custom tuning fees.
• Strengths: Highly customizable with frequent updates and a strong online community.
• Weaknesses: Requires technical knowledge and a compatible OBD adapter.
• Comparison to Piggyback Systems: More powerful and versatile but less straightforward to install.

JB4 by Burger Motorsports

Description: A hybrid solution that functions as both a piggyback device and an ECU tuner when paired with additional software.

• What They Do: Adjusts boost pressure, fueling, and timing to improve performance.
• Costs: $479-$799 for the device, with optional upgrades.
• Strengths: Easy to install and remove. Provides both piggyback and tuning capabilities.
• Weaknesses: Limited safety features compared to full ECU tunes. Requires additional components for full customization.
• Comparison to Piggyback Systems: Offers similar flexibility with added tuning capabilities.

Custom Tuning Options

• Description: Custom tuning allows for bespoke ECU maps tailored to your specific vehicle and performance goals.
• What They Do: Maximizes performance by accounting for unique modifications such as upgraded turbos, exhaust systems, and fuel types.
• Costs: $800-$2,500 depending on the tuner and complexity.
• Strengths: Fully tailored to individual needs. Can unlock the engine’s maximum potential.
• Weaknesses: Requires a skilled tuner and may impact reliability if not done correctly.
• Comparison to Piggyback Systems: Far more precise but requires a higher level of expertise and installation.

2. Piggyback Devices

Overview: Piggyback systems are external modules that intercept and modify signals to the ECU. Unlike full tunes, they don’t alter the ECU software directly. Many piggyback systems merely falsify boost readings, thus telling the engine to create more of it; this can be risky as cheaper piggyback systems do not monitor engine parameters such as overheating, though many will tell you that the BMW’s factory system will still monitor everything and regulate as needed.

JB4 by Burger Motorsports

• Description: The JB4 is one of the most popular and versatile piggyback systems for BMWs. It intercepts and modifies signals from the engine’s sensors to increase boost pressure and adjust fuel and timing parameters.
• Power Gains: Up to 80 horsepower and 100 lb.-ft of torque with basic setup; additional gains with supporting mods.
• Costs: $479-$799, depending on optional add-ons such as Bluetooth integration and fuel connectors.

What It Does:

• Enhances turbo boost pressure.
• Offers user-adjustable maps for different performance levels.
• Provides real-time logging and diagnostics through an optional Bluetooth kit.

Strengths:

• Plug-and-play installation.
• Highly customizable with multiple map options.
• Can integrate with methanol injection and ethanol blends for even more power.

Weaknesses:

• Limited safety features compared to full ECU tunes.
• Not as refined as dedicated ECU reprogramming.

Comparison to Full Tuning: JB4 provides flexibility and ease of removal, making it ideal for leased vehicles. However, full tunes generally offer more precise calibration and safety features.

RaceChip

• Description: RaceChip focuses on plug-and-play piggyback systems designed for ease of use and reliable performance enhancements.
• Power Gains: Up to 70 horsepower and 90 lb-ft of torque.
• Costs: $300-$700, depending on the model (e.g., RaceChip S, RS, GTS).

What It Does:

• Increases boost pressure and optimizes fuel delivery.
• Offers pre-configured maps tailored to the N63TU engine.

Strengths:

• Simple installation process.
• User-friendly design.
• Optional app control for real-time adjustments.

Weaknesses:

• Limited customization compared to JB4.
• Gains are slightly lower than other piggyback systems.

Comparison to Full Tuning: While RaceChip offers simplicity and reliability, full tuning solutions provide deeper integration with the vehicle’s systems and potentially greater power gains.

I chose the RaceChip S as I got it for a deal and have no available 93-octane gas near me (besides running E30, which I do), so I wanted a small performance increase without sacrificing peace of mind. The power gained is quite noticeable!

Dinan Dinantronics Elite V2

• Description: The Dinantronics Elite V2 piggyback system is a premium solution for BMW owners, designed to maintain factory drivability and reliability while boosting performance.
• Power Gains: Up to 60 horsepower and 80 lb-ft of torque.
• Costs: $1,200-$1,600.

What It Does:

• Increases boost pressure while optimizing fuel and ignition timing.
• Maintains compliance with emissions standards.

Strengths:

• Retains factory-like drivability.
• Covered under Dinan’s warranty.
• Engineered specifically for BMW vehicles.

Weaknesses:

• Higher cost compared to other piggyback systems.
• Less aggressive tuning compared to JB4 or Bootmod3.

Comparison to Full Tuning: Dinantronics prioritizes reliability and compatibility, making it a safer choice for daily drivers. Full tunes offer more aggressive performance gains but may come with increased risk.

CarBahn Piggyback Tuning

• Description: CarBahn Autoworks, founded by Steve Dinan, provides tuning solutions focused on balancing performance and engine longevity.
• Power Gains: Up to 70 horsepower and 90 lb-ft of torque.
• Costs: $1,000-$1,400.

What It Does:

• Adjusts boost, fuel, and timing parameters for improved performance.
• Ensures compatibility with BMW factory systems.

Strengths:

• Emphasis on engine safety and reliability.
• Backed by extensive engineering expertise.

Weaknesses:

• Limited user adjustability.
• Higher price point.

Comparison to Full Tuning: CarBahn’s piggyback system offers a middle ground between performance and safety, whereas full ECU tunes provide more extensive modifications but with potentially higher risks.

Bootmod3 (Hybrid Piggyback/ECU Tuning)

• Description: While primarily known for its full ECU tuning capabilities, Bootmod3 can also function as a piggyback system in certain setups, offering a unique hybrid approach.
• Power Gains: Up to 100 horsepower and 120 lb.-ft of torque with aggressive maps.
• Costs: $595 for the platform license + optional hardware costs.

What It Does:

• Allows for custom or off-the-shelf map uploads.
• Provides real-time logging and diagnostics.

Strengths:

• Unmatched flexibility in tuning.
• Supports advanced modifications like upgraded turbos and ethanol blends.

Weaknesses:

• Requires technical knowledge for installation and operation.
• More intrusive than traditional piggyback systems.

Comparison to Full Tuning: Bootmod3 blurs the line between piggyback and full ECU tuning, offering many of the benefits of both.

Key Comparisons: Piggyback vs. Full Tuning

Final Thoughts

Piggyback tuning systems offer a practical and reversible way to boost your 2017 BMW N63TU’s performance. Brands like JB4, RaceChip, and Dinan cater to different needs, from aggressive power gains to factory-like reliability. While full-tuning options provide greater potential, piggyback systems remain a popular choice for those seeking flexibility and ease of use. Choose the solution that best fits your driving goals, budget, and technical expertise.

3. Transmission Tunes

Overview: Transmission tuning enhances the ZF 8-speed automatic gearbox’s shift patterns, responsiveness, and overall behavior.

xHP Flashtool

Description: xHP Flashtool is one of the most popular transmission tuning solutions for BMWs equipped with ZF 8-speed transmissions. It allows users to flash customized maps to the transmission control unit (TCU).

What It Does:

• Enhances shift speed and smoothness.
• Reduces torque converter slip.
• Adjusts shift points to match performance tuning.
• Adds launch control and increased torque limits (for high-performance builds).

Costs:

• App license: $250-$350 (varies by map tier).
• OBD adapter: $40-$80 (e.g., MHD or Thor adapter).

Strengths:

• Fully customizable with pre-configured maps.
• Improves responsiveness in Sport and Manual modes.
• Supports DIY enthusiasts with step-by-step guides.

Weaknesses:

• Requires technical knowledge and a compatible OBD adapter.
• May void warranty if detected.

Dinan Transmission Software

Description: Dinan offers transmission tuning solutions that focus on enhancing performance while maintaining BMW’s factory-like drivability and reliability.

What It Does:

• Optimizes shift speed and precision.
• Matches shift points to Dinan ECU tunes for seamless integration.
• Preserves comfort-oriented behavior in normal driving modes.

Costs:

• $300-$500, depending on the vehicle model and tune.

Strengths:

• Smooth and reliable.
• Covered under Dinan’s warranty when installed by authorized dealers.

Weaknesses:

• Conservative tuning compared to other solutions.
• Limited user customization.

GTS Flash (OEM+ Tuning)

Description: GTS Flash applies the transmission settings from BMW’s high-performance models, such as the M5 Competition, to non-M vehicles equipped with the ZF 8HP.

What It Does:

• Increases shift speed and firmness.
• Enables more aggressive downshifts.
• Unlocks launch control settings.

Costs:

• $200-$400.

Strengths:

• OEM feel with sporty enhancements.
• Relatively easy to apply with tools like E-Sys or through a professional tuner.

Weaknesses:

• Limited to pre-configured settings.
• Not as customizable as xHP.

Custom TCU Tuning

Description: Custom transmission tuning involves creating bespoke settings tailored to your vehicle’s modifications and performance goals.

What It Does:

• Adjusts shift points, line pressure, and torque limits.
• Fully tailored to complement engine modifications (e.g., upgraded turbos, fuel systems).
• Enables unique features like drag racing launch setups or track-focused behavior.

Costs:

• $500-$1,500, depending on the tuner and complexity.

Strengths:

• Maximizes the potential of your specific build.
• Offers unparalleled control over transmission behavior.

Weaknesses:

• Expensive and time-consuming.
• Requires a skilled tuner and specialized equipment.

Eurocharged Transmission Tune

Description: Eurocharged specializes in performance tuning for European vehicles, including tailored transmission tuning for the ZF 8HP series.

What It Does:

• Increases shift speed and torque capacity.
• Refines throttle blipping in downshifts for smoother gear changes.
• Enhances responsiveness in Sport and Manual modes.

Costs:

• $400-$700.

Strengths:

• Proven performance improvements.
• Can be paired with Eurocharged engine tunes for optimal synergy.

Weaknesses:

• Limited availability in some regions.
• Less DIY-friendly than xHP.

EcuTek TCU Tuning

Description: EcuTek is a premium tuning platform known for its advanced ECU and TCU solutions. It provides in-depth customization for ZF transmissions.

What It Does:

• Adjusts shift logic, pressure, and torque limits.
• Adds features like rolling anti-lag and optimized launch control.
• Offers remote tuning support for convenience.

Costs:

• $800-$1,200 (includes license and tuning session).

Strengths:

• Advanced features for high-performance builds.
• Excellent support for custom setups.

Weaknesses:

• Higher cost than most options.
• Requires professional installation or guidance.

Comparison Table

Final Thoughts

Tuning the ZF 8HP75 transmission can dramatically improve your BMW 750i’s driving dynamics, whether you’re seeking faster shifts, smoother performance, or track-ready responsiveness. Choose the tuning option that aligns with your goals, budget, and level of expertise. For DIY enthusiasts, xHP Flashtool offers an excellent balance of features and accessibility. If you’re after a professional-grade solution, custom tuning or EcuTek provides unparalleled performance.

Always consider the potential impact on warranty and consult with a trusted tuner to ensure the best results.

4. Software Edits via BimmerLink

Overview: BimmerLink is an app that allows BMW owners to monitor and customize their vehicle’s software and settings.

What It Does:

• Reads and clears error codes.
• Monitors real-time data such as engine parameters, transmission status, and fuel usage.
• Enables Active Sound Design (ASD) adjustments or deactivation.
• Checks the status of Diesel Particulate Filters (DPF) and other systems.

Costs:

• App license: $39.99.
• OBD adapter: $40-$80.

Performance Improvements:

• Optimizes vehicle diagnostics to keep the car running at peak performance.
• Disables ASD for a more natural engine sound experience.

Strengths:

• Provides advanced diagnostic features.
• Pairs seamlessly with BimmerCode for a complete suite of tools.

Weaknesses:

No direct performance enhancement options.

5. Coding with BimmerCode

Description: BimmerCode is a powerful coding app that enables you to customize a wide range of features on your BMW. It is user-friendly and works with compatible OBD adapters.

What It Does:

• Enable hidden features such as Sport+ mode (if not already enabled).
• Adjust lighting settings (e.g., daytime running lights, welcome lights).
• Customize iDrive settings and startup animations.
• Modify seatbelt chimes and door-locking behaviors.

Costs:

• App license: $39.99.
• OBD adapter: $40-$80 (recommended adapters include Veepeak and Thor).

Performance Improvements:

• Allows enabling of Sport+ mode, which sharpens throttle response and transmission behavior.
• Offers the ability to lower the car (if equipped with adaptive suspension).

Strengths:

• Easy to use for beginners.
• Comprehensive documentation and tutorials available.

Weaknesses:

Limited to software-based customizations.es).

6. Advanced Tuning with ISTA (Integrated Service Technical Application)

OITSA+ (ISTA/D)

Description: ITSA+ is BMW’s official diagnostic and programming software, offering dealer-level capabilities for professional users.

What It Does:

• Enables coding, diagnostics, and software updates for all BMW systems.
• Performs advanced adaptations and resets (e.g., transmission adaptations).
• Updates vehicle software and modules.
• Allows retrofitting and activation of hidden features (e.g., adaptive cruise control, lane assist).

Costs:

• Software license: Free to $150 (depending on source and version).
• Hardware (laptop, ENET cable): $100-$200.

Performance Improvements:

• Optimizes engine and transmission behavior through adaptations.
• Unlocks advanced driving features like adaptive cruise and lane assist.

Strengths:

• Offers comprehensive control over the vehicle.
• Dealer-level tool for advanced users and professionals.

Weaknesses:

Setup process can be complex and time-consuming.

Requires technical expertise.

7. Bootmod3

Description: Bootmod3 is primarily known for its ECU tuning capabilities but also offers options for adjusting various vehicle features.

What It Does:

• Uploads custom maps to the ECU for enhanced performance.
• Allows adjustment of driving modes and throttle response.
• Provides real-time data logging and diagnostics.

Costs:

• License: $595.
• Additional hardware (OBD agent): $100-$150.

Performance Improvements:

• Unlocks significant horsepower and torque gains.
• Refines transmission behavior to complement engine tuning.

Strengths:

• Comprehensive tuning platform.
• Supports advanced users and modifications.

Weaknesses:

• Primarily focused on ECU tuning rather than general customization.

8. Carly for BMW

Description: Carly is a versatile app offering coding, diagnostics, and maintenance features for BMW owners.

What It Does:

• Codes vehicle features like light settings and seatbelt reminders.
• Conducts in-depth diagnostics and battery registrations.
• Tracks vehicle health and maintenance schedules.

Costs:

• App license: $69/year.
• OBD adapter: $59-$119.

Performance Improvements:

• Indirect improvements through better maintenance tracking and diagnostics.

Strengths:

• Intuitive interface.
• Broad range of features.

Weaknesses:

• Subscription model can be costly over time.

9. Thor TCU Tuning

Description: Thor TCU focuses on transmission tuning but integrates with vehicle-wide tuning capabilities.

What It Does:

• Adjusts shift speed and firmness.
• Enhances torque limits for improved drivability with engine tunes.
• Offers multiple pre-configured maps.

Costs:

• License: $250-$350.
• OBD adapter: $40-$80.

Performance Improvements:

• Improves shifting precision and responsiveness.

Strengths:

• Works seamlessly with engine tuning platforms.
• Focuses on performance and smoothness.

Weaknesses:

• Limited to transmission adjustments.

10. Other Coding and Customization Tools

• E-Sys: Advanced coding tool for power users. Offers deep customization but requires expertise.
• ProTools by BimmerGeeks: A professional-grade app for coding and diagnostics, offering features similar to ITSA and BimmerCode.

Comparison Table

From enabling hidden features to unlocking significant performance gains, tuning options for the 2017 BMW 750i are abundant and cater to various skill levels. Whether you’re a beginner exploring BimmerCode or a seasoned professional using ITSA, there is a solution tailored to your needs. For a balanced approach, consider combining tools like BimmerCode and xHP to achieve both customization and performance improvements.

11. Warranty Considerations

Tuning your BMW can potentially void parts of your warranty. Most dealerships can detect ECU and transmission modifications, even if reverted to stock. Piggyback systems are less likely to leave traces but aren’t foolproof.

To minimize risk:

• Use warranty-friendly brands like Dinan, which partners with BMW.
• Document all changes and be prepared to revert to stock if needed.

Final Thoughts

Tuning your 2017 BMW 750i xDrive can transform its performance and personalization. Whether you’re aiming for raw horsepower, smoother shifts, or a unique user interface, there’s a solution for every need and budget. Evaluate your goals, research thoroughly, and, if necessary, consult with professionals to ensure a seamless and satisfying upgrade experience.