Tuning with EGT Monitor

[Les Gibson]

Good day all. When I my Arrow the spare parts that came with it contained an exhaust gas temperature monitor with the thermocoupler sensors. Each header tube has a threaded bung welded in with caps. I haven't used it because I have no idea how to use it. Has anyone used a EGT monitor for tuning carb jetting, etc. ? It does work as it should as I threaded the sensors into the 7 & 8 tubes and it recorded temperature, but I have no idea what the temperature is telling me. Thanks in advance for any help!

 

[TT5.9mag]

I’ve never tuned by the egt. I have looked at the egt data to get an idea of how good the distribution is, but that’s all. Use the plugs to tune it, egt can get you in trouble, especially on gasoline. If you’re on methanol or e90 or something that doesn’t color the plug well, then the egt data can help.

 

[Les Gibson]

I’ve never tuned by the egt. I have looked at the egt data to get an idea of how good the distribution is, but that’s all. Use the plugs to tune it, egt can get you in trouble, especially on gasoline. If you’re on methanol or e90 or something that doesn’t color the plug well, then the egt data can help.

I run 112 Renegade fuel. Wasn't sure what the EGT monitor would be used for. I asked the guy I bought the care from and he said he never used it.

 

[Les Gibson]

I’ve never tuned by the egt. I have looked at the egt data to get an idea of how good the distribution is, but that’s all. Use the plugs to tune it, egt can get you in trouble, especially on gasoline. If you’re on methanol or e90 or something that doesn’t color the plug well, then the egt data can help.

But as far as distribution goes, I would assume you would want to see about the same temp in all 8 cylinders?

 

[TT5.9mag]

But as far as distribution goes, I would assume you would want to see about the same temp in all 8 cylinders?

Yes that’s the goal, but one cylinder can be lean and hot, and another cylinder can be rich and hot (on gasoline). That’s why the plugs are the all knowing all important tell all. But once dialed in, the egt data can help, just remember things like siamesed center cylinders will always be hotter, so there are other factors.

 

[TT5.9mag]

https://www.hpacademy.com/forum/gen...l-cylinder-lambda-vs-egt-interesting-results/

That thread has some really good stuff in it.