Hello..Im curious on how to read a EGT gauge? when im running lean?rich etc...thanks

 

http://en.wikipedia.org/wiki/Exhaust...perature_gauge

An Exhaust gas temperature gauge (EGT gauge) is an automotive meter used to monitor the exhaust gas temperature of an internal combustion engine in conjunction with a thermocouple type pyrometer. By monitoring EGT, the driver can get an idea of the cars air-fuel ratio. At a balanced air-fuel ratio, the exhaust gas temperature is lower than in a lean or rich air-fuel ratio. High temperatures (typically above 1600 degrees F) can be an indicator of dangerous conditions that can lead to catastrophic engine failure.

Love the use of the internet.

 

Buy a wideband 02 guage... Instead of guessing and attempting to learn what your A/F is..

 

have a wideband to help, when you run lean the egt will raise the temps higher then normal as the fuel in the combustion process also cools the engine down, thats why a higher octane burns slower to avoid detonation and spilling your rods and pistons all over the road. hope this helps ya

 

i was told that you dont need an egt gauge on an evo because the wideband does the trick

 

^ nOTHINg wrong with getting an egt gauge to supplement your WB, especially if you're running methanol.

 

Although, if you are going to monitor temp you may also want to understand probe placement plays a huge roll. Post turbo EGT's can not be accurate measurements because of the pressure difference over the turbine... meaning 800F post does not = 1200F pre.... every setup will have a different back pressure so you can not compare apples to apples.

 

EGT is not a reliable method of reading AFR. If you want to actually have a clue, you need a wideband. Period. EGT is best used as a supplement to wideband tuning, not a replacement.

 

800C is where the temp needs to be at WOT at the top of the rev range...

 

Thanks for the Info, I know on the 6G72T platform we run lean in the rear bank due and a EGT helps monitor that a little closer. I am going to be running both in the Evo just to keep an eye on things.

 

This is moot. The point of an EGT gauge is to know when a drastic temperature fluctuation occurs, such as following detonation; it's merely a safety device. You don't really care whether the temperature is 1400F or 900F, just as long as it's "normal" for the probe mounting location and driving conditions.

One advantage of mounting a probe further downstream is that you can make a gauge that would otherwise be inaccurate in the last 10% of gauge movement more accurate since it's reading cooler temperatures downstream. I'm not saying "hey, go throw it post-cat" or anything, but there's no reason why it can't be happy in the O2 housing or upper portion of the downpipe.