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Overland Tailor Tuning (OTT) is proud to announce the official release of our highly anticipated ECU and TCU tuning solutions for the 2024+ Toyota Tacoma featuring the 2.4L (T24A-FTS) engine in both gas and hybrid variants. After more than 6 months of extensive development and in-house testing, OTT is excited to offer a precision-engineered, comprehensive tuning solution designed to optimize performance, enhance drivability, and improve reliability.
For those who are familiar with OTT from our work with the 3rd Gen Tacoma, you’ll find the same high level of commitment and precision in the new models. OTT’s tuning is designed with a focus on real-world reliability and performance, not just raw power—though the new platforms certainly deliver a punch! In some cases, they provide more than three times the gains compared to what was possible with the previous naturally aspirated platforms!
Key Features of OTT’s New Tuning Solutions:
Unlike piggyback controllers, which manipulate the signals between sensors and the ECU, OTT’s tuning works natively within the factory ECU. This allows for precise and real-time adjustments to parameters like throttle response, fuel delivery, ignition timing, and boost control, ensuring that the ECU receives accurate information for optimal decision-making.
Piggyback Controllers vs. OTT’s Native ECU Tuning:
OTT’s tuning does not lock down the ECU or restrict access to factory programming modes. Unlike some newer tuning solutions, which may lock diagnostics modes and restrict dealership access to the ECU, OTT ensures that dealerships can perform diagnostics and service without interference, preserving warranty coverage and avoiding issues during routine maintenance.
Why Choose OTT Over Other Tuning Solutions?
The 4th Gen Tacoma and 5th Gen 4Runner Calibration from OTT will initially be available only through an authorized OTT retailer. DIY options are coming soon, however. To ensure consistent support across the OTT network, we've developed custom hardware for our retailers, enabling direct ECU Read/Write processes for quick, efficient, and safe tuning.
Revisions apply to your current calibration—whether it’s OEM Spec, Stage 0, or Stage 1. These updates are available at no additional cost (Retailers may charge a small service fee for time/labor related to revisions), ensuring that your tune stays optimized with the latest calibration advancements as software improvements become available.
OTT is also planning additional Staged packages to align with both current and upcoming bolt-on upgrades, keeping your vehicle’s performance evolving.
Additional Things to Know & Be Aware Of:
Stage 1 Dyno Results:
i-Force (SR5-TRD Trims)
RED: OEM Calibration, Stock Vehicle, 91 Octane
BLUE: OTT Calibration, Stock Vehicle, 91 Octane
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i-Force MAX (Hybrid TRD Trims, Inc. Pro/Trail Hunter)
RED: OEM Calibration, Stock Vehicle, 91 Octane
BLUE: OTT Calibration, Stock Vehicle, 91 Octane
For those who are familiar with OTT from our work with the 3rd Gen Tacoma, you’ll find the same high level of commitment and precision in the new models. OTT’s tuning is designed with a focus on real-world reliability and performance, not just raw power—though the new platforms certainly deliver a punch! In some cases, they provide more than three times the gains compared to what was possible with the previous naturally aspirated platforms!
Key Features of OTT’s New Tuning Solutions:
- Reworked Throttle Control Strategies: The new generation ECUs feature a completely new throttle control strategy compared to previous Tacoma generations. With this new strategy, we offer throttle sensitivity options of “Stock,” “Base,” and “Enhanced,” allowing drivers to tailor their vehicle’s throttle response to their preference, replacing the previous “Lite,” “Mild,” “Medium,” “Spicy,” and “Super Spicy” naming conventions.
- Enhanced Throttle Response and Reduced Spool Time for Turbocharger: OTT’s tuning sharpens throttle response and reduces turbocharger spool time, allowing for more immediate low-end and midrange torque. This means the engine reaches usable boost pressure more quickly, improving drivability and acceleration, particularly during off-the-line starts and when accelerating from low RPMs. This results in a more responsive driving experience, with faster throttle reactions all with smooth delivery.
- Rev Hang Reduction: For manual transmission owners, OTT’s tune reduces rev hang, allowing for quicker and more precise shifts. Currently undergoing testing.
- Stage 0 Customization: OTT offers Stage 1 and Stage 0 tuning solutions, with TCU updates for each drive mode to enhance driving performance. Stage 0 is available on request for those requiring reduced output at lower boost levels.
- SR Trim Calibration Option: OTT will offer the ability for SR trucks to receive “OEM Spec” calibration updates, bringing the base trim to the full output of the higher trim trucks. SR Trim vehicles are also supported in Stage 1 and Stage 0 configurations.
- Fuel Requirements: OEM Spec through Stage 1 calibrations are designed for Regular to Premium fuel, with peak performance achieved on Premium (Recommended).
- Exclusive Calibration Capabilities: One such ability is OTT's offering of a proprietary MAF calibration that ensures perfect integration with a retrofitted TRD Pro/Trail Hunter airbox, without triggering CEL codes. In addition, OTT is developing solutions such as Auto Start-Stop disable and other advanced vehicle customization options (to be announced at a later date).
Unlike piggyback controllers, which manipulate the signals between sensors and the ECU, OTT’s tuning works natively within the factory ECU. This allows for precise and real-time adjustments to parameters like throttle response, fuel delivery, ignition timing, and boost control, ensuring that the ECU receives accurate information for optimal decision-making.
Piggyback Controllers vs. OTT’s Native ECU Tuning:
- Spoofing Sensor Signals: Piggyback controllers modify sensor inputs (e.g., MAF, boost pressure, and throttle position) before sending them to the ECU. This disrupts the ECU’s ability to make accurate, real-time adjustments.
- Manipulated Outputs: These devices alter ECU outputs like fuel delivery, timing, and boost but lack dynamic, real-time adaptation, leading to inefficient engine management under varying driving conditions.
- Risk to Vehicle Safety Features: Toyota’s ECUs have built-in safety mechanisms such as knock detection and overboost protection, and temperature-specific mapping which piggyback controllers can bypass, putting the engine at risk when factory signals are spoofed.
- Native Calibration: OTT calibrations are directly integrated into the OEM ECU code, ensuring seamless performance optimization without the need for premium fuel exclusively. Unlike some piggyback controllers that restrict fuel choice. When the ECU remains in charge of decision-making, OTT can offer flexibility, allowing the vehicle to run on Regular or Premium fuel.
- Reliability and Safety: By working natively within the factory ECU, OTT ensures your vehicle’s safety features, such as knock detection and overboost protection, and temperature-specific mapping remain fully operational.
- OEM-Level Integration: OTT’s tuning is fully compatible with your vehicle’s factory systems, avoiding triggering error codes or safety warnings during service.
OTT’s tuning does not lock down the ECU or restrict access to factory programming modes. Unlike some newer tuning solutions, which may lock diagnostics modes and restrict dealership access to the ECU, OTT ensures that dealerships can perform diagnostics and service without interference, preserving warranty coverage and avoiding issues during routine maintenance.
Why Choose OTT Over Other Tuning Solutions?
- Native ECU Tuning for Reliability: OTT works directly within the OEM ECU, ensuring compatibility with Toyota’s factory safety features while maintaining system integrity.
- No Service Concerns: OTT’s tuning does not lock down ECU access, meaning your vehicle can be serviced at the dealership without restricting access to diagnostic tools or having to remove piggyback devices.
- Proven Performance: OTT’s tuning has been rigorously tested, providing proven horsepower and torque gains while ensuring your vehicle’s reliability and safety.
The 4th Gen Tacoma and 5th Gen 4Runner Calibration from OTT will initially be available only through an authorized OTT retailer. DIY options are coming soon, however. To ensure consistent support across the OTT network, we've developed custom hardware for our retailers, enabling direct ECU Read/Write processes for quick, efficient, and safe tuning.
- MSRP through authorized retailers: $650 USD
- DIY Kit Pricing: $850 USD (Includes VFTuner WiFlash Device & Software, Licensing Credits, Calibration suite, and shipping/handling)
Note: DIY option currently requires a Windows-based PC. The software suite includes vehicle-specific protocols for reading/writing from the new generation ECU, as well as a comprehensive high-speed data logger.
VFTuner "Legacy" users must upgrade to WiFlash for compatibility with the new ECU. An upgrade path will be available for prior WiFlash clients.
Revisions apply to your current calibration—whether it’s OEM Spec, Stage 0, or Stage 1. These updates are available at no additional cost (Retailers may charge a small service fee for time/labor related to revisions), ensuring that your tune stays optimized with the latest calibration advancements as software improvements become available.
OTT is also planning additional Staged packages to align with both current and upcoming bolt-on upgrades, keeping your vehicle’s performance evolving.
Additional Things to Know & Be Aware Of:
- Multiple Calibrations for Each Trim: With the new generation ECUs, there are multiple calibrations available for each vehicle trim, unlike previous generations where a single calibration covered up to 2-3 model years. Due to this, not every vehicle will be immediately available at launch. OTT has worked hard to build the most extensive library of available calibrations to support as many vehicles as possible from the start so the impact should be relatively minimal.
- Calibration Availability: We have a broad library of files ready, but new calibrations may occasionally surface. If your truck has a calibration that isn't yet available, it cannot be supported until we obtain a physical read of that ECU. If you help facilitate this by coming in for a read, OTT will offer a $50 incentive. OTT and VFTuner greatly appreciate your assistance!
- New 2025 Models: With the release of the 2025 models, OTT is in the process of building a calibration library for these new ECU ID’s. It should be expected that 2025 model year vehicles will require us to read the files, and these files might not be immediately available until we’ve built the library.
- CARB-EO Compliance: OTT is working to obtain CARB-EO for Stage 1 calibrations, ensuring full compliance for customers in California and other similar-regulated states. This effort will ensure that OTT’s tuning solutions remain fully street-legal in these areas, allowing performance enhancements without violating emissions regulations.
- Revisions and Updates: Revisions apply to your current calibration—whether it’s OEM Spec, Stage 0, or Stage 1. These updates are available at no additional cost (Retailers may charge a small service fee for time/labor related to revisions), ensuring that your tune stays optimized with the latest calibration advancements as software improvements become available.
- OTT is also planning additional Staged packages to align with both current and upcoming bolt-on upgrades, keeping your vehicle’s performance evolving.
Stage 1 Dyno Results:
i-Force (SR5-TRD Trims)
RED: OEM Calibration, Stock Vehicle, 91 Octane
BLUE: OTT Calibration, Stock Vehicle, 91 Octane
-----------------------------------------------------------------------------------------------------------------------------------------
i-Force MAX (Hybrid TRD Trims, Inc. Pro/Trail Hunter)
RED: OEM Calibration, Stock Vehicle, 91 Octane
BLUE: OTT Calibration, Stock Vehicle, 91 Octane
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