EGT readings

[wicked6]

What is everyone seeing as their sweet spot in EGTs.

My car seems to like 1625-1650. Is that too high?

 

[Steve Wood]

not if your car likes it.

it depends upon drivetrain combination, ambient conditions, probe type/location, etc.

 

[wicked6]

As long as there is no knock and 02 do not go below 750, I am ok right!!!

 

[BLACK6PACK]

That is what my car likes. My 02s were right around 770 at 1640*

 

[bruce]

Originally posted by wicked6
As long as there is no knock and 02 do not go below 750, I am ok right!!!

Tuning by the oem O2 sensor is just slightly better the just guessing.

Using a GM O2 I had 12.5 and 11.8:1 at 830.
Hardly accurate.

I would try some more fuel.
If there is no lose in performance the add some more.
You'll get much better egine life being border line too rich then too lean, given the same EGT, and yes you'll have to work with the timing some to get the best results.

 

[c&cgn]

Originally posted by wicked6
What is everyone seeing as their sweet spot in EGTs.

My car seems to like 1625-1650. Is that too high?

I think that is a pretty decent reading. My car happens to like that exact range for peak HP, but you will have to find out for yourself what your car likes.

I ran my car this past weekend around 1525-1550* just to be on the safe side while I was bracket racing. I could tell the car was way down on power but I wasn't worried about it since I wasn't trying to push the car too hard.

Also, if you are using EGT I would ignore the oem O2 sensor all together. If you want to correlate the two readings you will have to do it on a brand new O2, but they won't match for long. You will be surpised how quickly C16 skews the readings on your O2.

 

[Steve Wood]

If you do a search online, you will find a number of sites that explain why our narrow band sensors are useless for wot tuning.

Here is one with a graphical description as well as some tuning comments using a wide band sensor.

http://www.hondata.com/techwidebandtuning.html

Yeah, I know, those Hondas use different science than our cars....