The Ford Explorer ST has rapidly gained acclaim among enthusiasts for its impressive blend of performance and practicality. With a robust 400+ horsepower in its stock configuration, this SUV offers both family-friendly utility and track-ready capabilities. COBB Tuning has elevated the Explorer ST’s performance further by introducing a suite of features, including Transbrake, Bump Box, and Creep Mode, accessible through their Accessport. These enhancements are designed to optimize your vehicle’s launch and overall track performance.
Understanding the Transbrake Feature
A transbrake is a device commonly used in drag racing to improve a vehicle’s launch by locking the transmission, allowing the engine to build up RPM and boost pressure before launching. This results in a more aggressive and controlled start, reducing wheel spin and improving 60-foot times. Warning Note: The default RPM setting for the transbrake feature is 2500 RPM. Higher boost pressures can be achieved by increasing the Transbrake Load Target. However, it’s important to understand that using the transbrake feature can place significant strain on your engine, clutches, transmission, axles, tires, and differential. Proceed with caution and use this feature only if you fully accept and acknowledge the associated risks and responsibilities.
Key Features Introduced by COBB Tuning
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Transbrake: This feature allows drivers to build and hold engine RPM and boost pressure at the starting line, leading to more consistent and quicker launches. In a race where every inch matters, staging perfectly is a science. Explorer ST transbrake on the COBB Accessport makes it easier. Choose between two different staging modes: Creep and Bump. Pick the method that suits your preference, and fine-tune for your needs and driving style. This can be done through the “Tune” > “Adjustments” > “Transbrake Staging Mode” > Set the value to “0” to use the Creep method, or set the value to “1” to use Bump Box for staging.
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Bump Box: Enables precise vehicle positioning at the starting line by allowing small, controlled movements without disengaging the transbrake.
The Bump Box feature enables you to “bump” the car forward into staging while remaining on the Transbrake. This tool is especially valuable when managing RPM and boost targets or adjusting to the pace set by the tree operator. It provides the crucial time needed to reach your desired RPM or build sufficient boost before launching. With the Bump Box, you can effectively build both RPM and boost while precisely staging the car, giving you a competitive edge on the track.
You can change the delay time of each “bump.” This can be adjusted through “Tune” > “Adjustments” > “Change Transbrake Bump Time” > Set the value to your desired bump using the up/down buttons and press enter (center button).
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Creep Mode: Facilitates slow, controlled forward movement, useful in staging the vehicle or navigating in confined spaces.
Creep Mode offers a smooth and controlled way to move forward when aligning at the tree using the transbrake, providing a more measured alternative to the sharper motion of the Bump option. To activate Creep Mode, simply press and hold the left paddle to engage the transbrake. Then, use the right paddle to gently advance forward with precision and ease.
You can change the rate of “creep” by going to “Tune” > “Adjustments” > “Transbrake Creep Pressure” > Set the value to your desired pressure using the up/down buttons and press enter (center button).
Activating and Utilizing the Transbrake Feature
To access these features, ensure your Accessport firmware is updated to version 1.7.6.0-26949. This can be done using the Accessport Manager software. Once updated, navigate through the Accessport menu:
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Select “Tune”
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Choose “Adjustments”
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Enable “Transbrake” by setting the value to “1”
The default RPM setting for the transbrake is 2500 RPM. Adjusting the Transbrake Load Target can allow for higher boost pressures, but it’s crucial to proceed with caution to avoid potential drivetrain stress.
Safety and Maintenance Considerations
While these features significantly enhance performance, they also place additional stress on the vehicle’s drivetrain components. Regular maintenance and inspections are essential to ensure the longevity and reliability of your Explorer ST. Always operate within the recommended parameters and consult with professionals if unsure about adjustments.
The Ultimate Drag Racing Explorer ST Transmission Tune Features
COBB Tuning’s introduction of the Transbrake, Bump Box, and Creep Mode features for the Ford Explorer ST represents a significant advancement for enthusiasts seeking to maximize their vehicle’s performance. By understanding and responsibly utilizing these features, drivers can experience enhanced launch control and overall driving dynamics, making the Explorer ST even more formidable on the track.
