egt.

[azn2nr]

ok, ive been reading forums at nabisco and a couple dsm and vw forums and all of them say that the best temp reading for a egt is 1600 degrees F. the only problem is that the highest reading ive see a guage get is 1600. so my question is why is 1600 a good temp to be at and if so how would you use it to tell if someting is going wrong.

[magnux]

Heh, oddly I was just going to post something along this same topic.

I've been wondering what average/optimal/etc.. EGT readings should be, as mine usually top off around 1600 @ full boost/throttle. On average, they shoot up to 1400 around town during acceleration, but usually level off around 1250/1300 when I reach a cruising pace.

I've always been worried they were too high, but the more and more I've read, I've seen that these temps are about right for factory turbo cars. Hell, look at Buick Grand Nationals, they run around 1600+ and love it.

I figure, with our cast iron setup, 1600 really isn't that much.. now if it was aluminum, maybe I'd be more concerned.

This isn't really an "answer", it's just more of what I've found so far. Maybe one of the more experienced people can chime in with their findings, I'm sure more of us would love to know.

I did notice, though, that when I upgraded my downpipe and exhaust to a straight through setup and cleaned/balanced my injectors, my average EGT temps dropped around 50/100 degrees.

* Edit: Also, to point out, some readings may vary depending on where you've placed your EGT sensor. Some people, I've seen, have placed them too far back on the exhaust.. thus rendering them pretty much useless. *shrug*

[dscoobydoo]

Since we all know that cylinder #3 is the one that normally runs more lean, that is where the probe should be placed. I have to agree on temp, where most gauges only go up to 1600. My autometer one only goes to that, so above that temp, we can only guess.

As for placing the probe further out in the stream, I am not sure that it makes it ineffective, you just don't get the more accurate readings that you would right off of the exhaust port.

BUT, by placing it a hair further, it cools a bit, so you would be able to notice spikes in temp, because it would be reading 1400 instead of 1600 while on high throttle.

On my Maxima, I put the probe 8-10 inches away from the exhaust outlet.
My normal readings are: idle- 500, 60mph 5th gear- 900, full throttle, 4th gear, 80mph- 1100

I have yet to put one on the Legacy yet, because I am going to a 3 inch exhaust. After reading the posts here, I was thinking about the same 8-12 inches from cylinder #3's exhaust port.

Too close, and you max the gauge reading, too far, and the accuracy drops. So there has to be a happy medium.

So where you have guys put your probe? ( just for comparison)