Exhaust gas temperatures (EGT) are very useful when tuning. They can quickly alert you to dangerous air/fuel ratios before a catastrophe occurs. Megasquirt has the ability to log and display EGT values, but not without extra hardware.

SymTech Labs EGT Interface Modules are directly compatible with Megasquirt-I and MS1/Extra firmware and read from 0 - 1832 degrees Fahrenheit (0 - 1000 degrees Celsius). MS2/Extra support for EGT logging is on the way!

Installation is simple! Rather than sending your unit away to have a circuit installed, you can add the EGT logging feature yourself with five easy connections: two to the EGT probe, one for +12V power, one to ground, and one to a spare I/O pin on the Megasquirt microcontroller. These modules include an adhesive foam backing for mounting directly inside your Megasquirt unit.

An EGT probe is not included with this interface module. Any K-type thermocouple (chromel/alumel pair) probe is compatible.