What is EGT???

Exhaust Gas Temperature I think.... Gives you an idea as to exactly how hot things are inside your combustion champer.

thanks

You'd have to drill/tap/weldabungonto your exhaust manifold to use an EGT gauge. Lotsa hassle.

Rusty said:

You'd have to drill/tap/weldabungonto your exhaust manifold to use an EGT gauge. Lotsa hassle.

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yeh sounds like way too much work, i've just ordered a bog standard boost gauge

EGT can be used as a tuning tool. It gives you a rough idea of how rich or lean you're running. On my DSM, I'm going to be using my EGT to see how much I can lean out my fuel trims with a piggyback ecu controller. Its a little more accurate than tuning with an A/F meter

It's different information than tuning by AFR, it's no replacement for good AFR data (as in, wideband). It's a nice tool to have, but it is a lot more painful to install than most gauges, and there's other ways to monitor your engine health that can be more insightful (knock indicators, wideband O2), mostly because there's too many factors that can affect EGT to use it as a bible.