Replace your Tachometer with EI’s CGR-30P, and bring glass panel technology to your panel today, without breaking the bank.


The Main Screen

The Main Screen displays the Tachometer and Manifold Pressure in large, beautiful analog arcs at the top of the instrument. Directly below the analog arcs, the respective digital values of each function are displayed. The analog display provides pilots with immediacy and quick reference values, while the digital display gives pilots the precision to accurately monitor their engine.

For aircraft without a constant speed prop, pilots may choose to display fuel flow instead of Manifold Pressure on one of the two arcs at the top of the instrument, which will free up another location on the Main Screen for another function.

In addition to the two arcs at the top of the Main Screen, the CGR also provides pilots with a complete, Primary Replacement EGT/CHT Bar Graph Analyzer. Each cylinder is monitored by the CGR, and if any engine temperature rises above or below programmed limits, the CGR will let you know immediately. The EGT/CHT Bar Graph Analyzer also has a Lean-of-Peak Mode and a Rich-of-Peak Mode for easy engine leaning. The CGR will let you know as each cylinder peaks, at what temperature each cylinder peaks, and how far below each cylinder is operating once they have peaked.

To the Right of the EGT/CHT Bar Graph Analyzer, the CGR contains three STC’d, Primary Replacement engine instruments. Choose between myriad options, including Fuel Pressure, Oil Pressure, Oil Temperature, TIT, Volts, Fuel Level(s), Vacuum, and more.

Bar Graph



The CGR-30P comes standard with a state-of-the-art, full-color bar graph which assists with ROP/LOP leaning. Additionally, the bar graph has both “normalized” and digital readout screens. No other bar graph in the industry comes close to providing the number of options the CGR-30P offers.

ROP Mode

The Rich-of-Peak mode on the CGR-30P informs the pilot when the first cylinder peaks, as well as how many degrees below peak the engine is operating.

LOP Mode

For Lean-of-Peak Operations, the CGR-30P informs the pilot as each cylinder peaks, at what temp each peaks, and how far from peak each is. For quick reference, every cylinder’s peak information is constantly displayed and “tattletale bars” are shown above each cylinder, indicating where each cylinder peaked the last time the engine was leaned.

Normalized Mode

The Bar Graph can easily be “Normalized,” creating a baseline from which to monitor in- flight engine temperature changes. When Normalized, all of the bars start off at the same height. If any cylinder’s column is not the same height as the others, than that cylinder’s Exhaust Gas Temperature has changed in relation to the other cylinders. These changes can be critical indicators to problems occurring within your engine.

Peak Markers

While other monitors don’t maintain your engine’s leaning history, The CGR-30P’s Bar Graph keeps track of exactly where the cylinders peaked during each leaning process. When leaning, the CGR-30P displays a peak marker indicating where each cylinder peaked during the last leaning process, providing visual assistance to pilots.

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