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# The Key to a Perfect Tune is Understanding the Data!

View, Analyze, Tune.. Tuning from data, simplified!

In today's world the most important tools are no longer found in your toolbox. Just think, in the 1980's Top Fuel dragsters made 2500 hp using a 500 cubic inch ( 8.2 Liter) Aluminum Hemi headed engine, as amazing as this might sound, today this same displacement and very similar looking hemi headed engines are making over 8000 hp! Why? It is all about optimizing all aspects of the engine to improving efficiency. This demands the tools to gather data so you can understand what is happening inside the engine and identify opportunities to improve efficiency.
Buy MegaLogViewer HD and unlock all the features to tune your vehicle right.
This free edition of MegaLogViewer HD provides you superior viewing of log file from TTS, Power Vision, Power Commander and more.
Discover your ideal tune with MegaLogViewer HD
Now visualize your data in a way you never could before to quickly identify problems or opportunities. Load both the data log and tune settings, viewing together. Capture long log files and easily navigate through the data, apply built in analytics, custom formulas and simplified views.

- 3 Axis Scatter Plots allowing you to view an entire log files in a single comprehensible view. When combined with the calculated and custom fields, this has proven to be a very powerful tuning aid.
- Histogram / Table generator. Generate a table of spark timing, VE Values, AFR, AFR Error or any other combination you can dream up.
- No file lenght limit.
- Load native MDF and other binary files, no need for csv exports
- Load dozens of log formats Power Vision log files, no need formating or data massaging.
- Load almost any other csv or delimited file formats.
- VE Analyze - Unparalleled Analyisis of your log files and tune correct your fuel table for you. Supported on MegaSquirt, AMP EFI, DTA Fast, rusEFI, Speeduino and any other EFI systems using TunerStudio MS tuning application.
- View and Edit your Fuel, Spark and AFR tables from a tune file.
- Table cells marked for each record
- Navigate quickly through hundreds of thousands of records long.
- Zoom in and out.
- View any 16 grouped Replay Signals.
- Compare mode - Overlay second file values
- Play back of log files syncronized between all tabs.
- Create your own Calculated Fields - RPM/Sec, Vacuum, Boost, PW-1. See Advanced Math.
- Customizable colors, gauges and UI features.

## The Power of Histograms and 3D Scatter Plots

## Histograms / Table Generator

Picture being able to select any field for your X, Y and Z axis and instantly have a table generated with statisics on the data!
Generate a table of spark timing, VE Values, AFR, AFR Error or any other combination you can dream up.
Then dive deeper in to that data by applying filters that may remove unwanted data or help explain what inputs are behind the table. Filters can be clicked on and off with a near instant rerendering.
See exactly how far off every cell of you fuel table is by processing all the data in your logs.
You can plot your spark or AFR table, see where in on the maps knock is occuring. The uses are endless and limited only by the data in your logs.

## 3D Scatter Plots

The Scatter Plots built in to MegaLogViewer are no ordinary Scatter Plots. Most Scatter Plots are designed for small data sets, MegaLogView is designed to render Tens or hundreds of thousands of data points instantly. Make changes, apply new filter limits, change fields, you see it all instantly. Since the introduction of Scatter Plots in MegaLogViewer users have found so many amazing ways to make tuning faster and simpler.
Check out this example Scatter Plot of RPM vs MAP with AFR on the Z Axis. All at once you can look at the data from an entire 45 minute drive in one picture, instantly seeing rich and lean sections of the fueling table.

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