For automotive enthusiasts and performance tuners, precise vehicle data is crucial. Moving beyond basic gauges, a digital dash system like the AIM Sports MXL Pista offers a significant leap in data acquisition and analysis. Initially, like many, I explored simpler logging solutions but quickly realized the unparalleled value of a comprehensive system, especially when it comes to critical parameters like OBD2 data and vacuum measurements.
Early attempts to log vehicle performance involved aftermarket PLX devices.
While these provided readings for water temperature, oil temperature, oil pressure, boost, AFR (Air-Fuel Ratio), and IAT (Intake Air Temperature), a fundamental element was missing: RPM (Revolutions Per Minute). Without RPM data, interpreting logs for tuning adjustments becomes significantly limited. Knowing the AFR and boost levels across the RPM range is essential for precise tuning, as acceleration isn’t uniform throughout a power pull. Simply providing a 2000-7200 RPM pull log with general AFR and boost figures lacks the granularity needed to pinpoint rich or lean spots at specific engine speeds.
Recognizing this critical gap, the decision was made to invest in an AIM Sports MXL Pista dash. While the MXL Strada, a more budget-friendly option, presented itself, its lack of data logging capabilities made it less appealing. The core requirement was robust data logging for tuning revisions and in-depth post-track day or autocross data analysis. The MXL Pista, with its advanced logging features, became the clear choice for comprehensive vehicle performance monitoring, including the ability to interface with OBD2 systems and monitor vacuum.
Discussions were held to determine the optimal sensor channels for my vehicle’s logging setup. The finalized configuration included:
- Water Temperature
- Oil Temperature
- Oil Pressure
- Boost Pressure (and Vacuum)
- AFR
- EGT (Exhaust Gas Temperature)
- Speed (integrated)
- RPM (integrated)
- Lateral G-force (integrated)
- Two auxiliary channels (initially for MAF voltage, with plans for TPS – Throttle Position Sensor)
- Running Gear Calculation (integrated)
- Lap Transmitter and Beacon compatibility for precise lap timing
- GPS add-on capability for accurate track mapping (a future upgrade consideration)
A custom harness, pre-configured with appropriate sensors and wiring extensions, was ordered to streamline the installation. This thoughtful preparation, including custom wiring for the MAP (Manifold Absolute Pressure) sensor, greatly simplified the setup process.
Upon receiving the AIM Sports MXL Pista system, the immediate impression was the exceptional build quality of both the logger and the sensors.
The integrated temperature sensors, seamlessly built into the wiring, exemplify this quality. Installation is remarkably straightforward: screw in the 1/8 NPT temperature sensors, connect the wire to the MXL harness with a simple click, and the sensor is integrated. This eliminates the need for separate power and ground wires for each sensor, along with complex crimping or stripping. The robust insulation of all wires and the minimal noise in the data logs further highlight the system’s professional-grade design. The overall installation experience was surprisingly refined and efficient.
For specific sensor placements: water temperature is measured in the upper radiator hose using a standard 1/8 NPT sensor adapter. Oil pressure is monitored via a TRM oil distribution block, utilizing a side port while retaining the factory oil pressure switch. Oil temperature is measured at the Rallyroad.net oil cooler cap, a location found to provide faster temperature response compared to an oil distribution block due to consistent oil flow across the sensor.
Boost pressure and vacuum readings are sourced from the brake booster line, a common and accessible vacuum source. AFR data is derived from a custom sensor table configured for the 0-5v output of an NGK AFX wideband sensor. Speed input is obtained from the ABS control unit, tapping into the front left wheel speed sensor wires, with tire circumference programmed into the MXL software for accurate readings. RPM signal is directly tapped from the black RPM wire located at the back of the factory gauge cluster.
The MXL Pista excels in capturing detailed data logs. This example focuses on boost curve stability, showcasing the consistent boost maintained in 4th and 5th gear.
The system features six programmable warning lights (three per side), configurable for various parameters. Current warnings are set for water temperature, oil temperature, RPM-conditioned oil pressure, boost pressure, over-rev, and one additional customizable warning. Continuous data recording for up to 8 hours ensures comprehensive logging, essentially capturing every drive since initial setup. Data logs are easily accessible via a USB connection on the MXL unit. When memory is full, the system intelligently overwrites the oldest logs, ensuring continuous data capture. Adjustable sensor sampling rates further aid in memory management, with the Pista supporting up to 2000 samples/second, far exceeding typical requirements.
Visual feedback is enhanced by programmable shift lights along the top of the dash (ten in total). These lights illuminate sequentially, indicating approaching shift points, culminating in a blinking sequence of the final two lights to signal the optimal shift moment. Beyond basic data logging, the MXL Pista offers advanced “math channels,” enabling calculations based on logged parameters. For instance, using vehicle weight, drag coefficient estimates, speed, and RPM data, virtual road dyno plots can be generated to estimate horsepower based on vehicle acceleration. The system’s capabilities extend to recording lateral G-forces and integrating potentiometers for shock monitoring, demonstrating its versatility for comprehensive vehicle dynamics analysis.
Custom sensor tables allow for seamless integration of various sensors. For example, the 0-5v output from the NGK AFX wideband is translated to AFR readings via a custom table defined in the MXL software. Similar custom tables are implemented for TPS and MAF voltage, showcasing the system’s adaptability to log virtually any sensor with a voltage output.
For those seeking a powerful data logging, race data acquisition, and digital dash solution, the AIM Sports MXL Pista is a premier choice. While not a necessity for every driver, its capabilities for tuning and data analysis are undeniable. Contact TRM for further information and system configuration options. The retail price for the MXL Pista starts at $1999, plus sensor costs. Investing in a system like the AIM Sports MXL Pista unlocks a new level of understanding and optimization for your vehicle’s performance.
