When you are tuning, testing, or chasing a problem, boost alone is not enough. What matters is how much air mass the engine is actually getting, and that means looking at manifold air density, not just pressure. Density accounts for both pressure and temperature, so it gives you a clearer picture of what a supercharger, intake change, or calibration adjustment is really doing. That is where the Banks iDash comes in. It logs ECU data, lets you add sensor inputs, and puts the important parameters in one place with custom layouts, alerts, and multiple pages. You can mark an event during a pull, review the log later, and quickly find knock, low boost, AFR error, temperature changes, or anything else that needs attention. If a check engine light shows up, you can also pull diagnostics and freeze-frame data to see the conditions that triggered it. For development work, track use, or street troubleshooting, this gives you the same kind of visibility we rely on internally: real data, recorded in context, so you can see what changed and why it matters.
The video begins with a walkthrough of setting up data logging on the Banks iDash DataMonster. From the logging menu, the user selects the parameters to record and sets the logging rate to 20 hertz. Once configured, returning to the home screen allows logging to be started quickly by holding the back button for about two seconds.
While driving, the gauge can also insert event markers into the log file. A single press of the bottom-right back button creates a flag, which marks the exact moment something noteworthy happened, such as knock, an overboost condition, or any other unusual behavior. When the log is later opened on a computer, those markers make it much easier to jump directly to the relevant event instead of searching through the entire file.
A major focus of the discussion is manifold air density, which Banks treats as a more meaningful performance metric than boost pressure alone. Manifold air density is similar to manifold air pressure, but it also accounts for temperature. Because density represents the mass of air in a given volume, such as pounds of air per cubic foot, it reflects how much oxygen is actually available to the engine.
That makes it more useful than boost by itself. Pressure alone only indicates how compressed the air is, while hotter air is less dense and therefore contains less oxygen. By combining pressure and temperature into one measurement, manifold air density becomes a more complete indicator of engine performance potential. In this explanation, the goal of any performance upgrade is framed as increasing manifold air density rather than simply increasing boost.
This density-based approach becomes especially important when comparing the stock supercharger with a larger 2.7-liter unit. Any airflow-related upgrade should ultimately be judged by whether it raises manifold air density. If the new supercharger is better, the logged data should show a measurable increase.
The system can also be expanded with additional pressure and temperature sensors placed at different points in the intake path. For example, sensors could be installed between the supercharger and the intercooler to isolate the supercharger's contribution more precisely. By collecting a baseline data set with the stock supercharger and then repeating the same test with the upgraded unit, Banks can compare how much additional pressure the new blower produces and whether it does so more efficiently. If the larger supercharger is more efficient, it should produce lower air temperature at the same boost pressure. The iDash is presented as the central tool for collecting and comparing all of that information during product development and calibration work.
Banks explains that the iDash has become its primary instrumentation platform for product development. The company previously relied on much more expensive industry-standard systems costing more than $60,000, but now uses the iDash for the same kinds of measurement and logging tasks. The claim is that the iDash can perform the necessary functions in a cheaper, easier, and more refined package.
Although it is described as professional-grade, the device is also intended to be accessible to ordinary enthusiasts. The idea is to give consumers the same kind of insight into engine behavior that Banks uses internally during engineering and testing. Rather than being limited to a simple display gauge, the iDash is positioned as a compact data system that can reveal what the engine is doing in real time and during recorded test sessions.
The gauge system is modular. In the configuration shown, two gauges are installed, but the setup can be expanded to four. Each gauge can display up to eight parameters, and the interface supports multiple layouts depending on how many values the user wants visible at once.
The display also supports custom alerts. Any parameter available from the ECU can be assigned a high alert, a low alert, or both. In the demonstration, the gauge turns yellow because an RPM warning threshold has been exceeded. The alert system is intended to catch the driver's attention without requiring constant monitoring of the screen. This is particularly useful on track, where the driver may not have time to watch gauges continuously. If a parameter such as knock, exhaust gas temperature, or another critical value exceeds its limit, the warning appears prominently for about two seconds. After that, the alert moves to an indicator in the upper-left corner, and the affected parameter continues blinking red and white so the driver can identify the problem.
Because the system reads whatever the ECU makes available, it can also be useful with alternative fuels such as E85. If the ECU outputs ethanol percentage, the gauge can display it in real time. Likewise, if the ECU provides knock retard, knock trim percentage, short-term corrections, or similar values, those can be monitored and used as warning triggers.
The video also covers the optional ambient air density sensor, referred to as the AirMouse. This small external module mounts near the grille and continuously measures ambient pressure, ambient temperature, and relative humidity. From those inputs, the system calculates additional environmental values such as ambient air density, density ratio, and density altitude.
Those measurements are especially relevant for tuning and testing because changing weather conditions can affect engine behavior. Drag racers often pay attention to density altitude, dew point, and the amount of moisture in the air, and Banks notes that humidity can influence how knock-sensitive an engine is. Logging ambient conditions alongside engine data makes it easier to compare one dyno pull or road test against another. If a calibration change appears to alter performance, the environmental data helps determine whether the difference came from the tune or simply from changing weather.
Several of the live parameters shown on the gauges are aimed directly at calibration and diagnostics. RPM is displayed along with engine CFM, which represents the engine's pumping volume based on displacement and RPM. Air-fuel ratio is read directly from the ECU, including left-bank and right-bank values, as well as the ECU's commanded AFR. The system also calculates AFR error, showing how far the measured mixture is from the commanded target. If AFR error exceeds roughly half an AFR, that may indicate something is wrong and worth investigating.
That kind of monitoring can help identify developing problems before they become failures. A bad oxygen sensor, a failing knock sensor, an intake leak, or an exhaust leak could all show up as abnormal trends in the data. The gauge also displays manifold air pressure, manifold temperature, and ignition timing. Manifold temperature is particularly important when evaluating supercharger changes, because increasing the pressure ratio or overdriving the blower should raise manifold temperature. That temperature rise, combined with pressure data, becomes a useful reference for judging supercharger efficiency and for tuning the engine safely.
Beyond live monitoring, the iDash also performs diagnostic functions. It can read and clear check-engine-light codes, and it captures the associated freeze-frame data. That snapshot records the operating conditions present when the fault occurred, including values such as RPM, engine load, and manifold pressure.
This is useful both for technicians and for Banks' own prototype and research-and-development work. When testing new parts, the team can monitor the engine continuously and then review exactly what happened if a fault appears. Because the data is stored on an SD card, the files can be opened later on a computer to examine the trouble code together with the recorded operating conditions. That makes troubleshooting much more precise than simply knowing that a code was set.
The final part of the overview highlights two convenience features: built-in min/max logging and multi-page gauge layouts. Every gauge, including the DataMonster, continuously tracks minimum and maximum values unless the user clears them. These values persist even after key cycles, so the system retains the previous run's extremes. For any displayed parameter, the user can review the highest or lowest recorded value, including things like manifold air density, boost, or vehicle speed. That makes it useful not only for testing but also for checking how a vehicle was driven.
The display can also be configured with up to five separate pages, each with its own layout, parameter selection, and even color scheme. A long press of the bottom-right button switches between pages. One page might be dedicated to pressures, another to temperatures, another to track driving, and another to street use. Unused pages can be disabled so switching is faster. Banks also mentions integration with products such as the Derringer tuner, allowing one page to focus on tuner controls while other pages are reserved for broader monitoring. The segment closes by noting that the system becomes even more powerful when additional sensor modules are added, especially in preparation for evaluating the larger supercharger upgrade.