Yet another EGT question...

[endlessMyk]

Ok, when I'm just driving around usually my EGT is reading around 14. This isn't getting on it or anything, just standard daily driving. The past weekend I took a trip, on the highway, in fifth gear at about 2700 rpm and only 60mph my EGT was going up to almost 16. I'm just having a hard time believing it.

What should I check for with this? I know that hitting 16 is NOT good. Not sure what other info I should provide, but any feedback would be appreciated.

 

[DSMunknown]

http://dsmtuners.com/forums/showpost.php?p=151018781&postcount=8
http://dsmtuners.com/forums/showpost.php?p=151018835&postcount=10

Source of the above links:
http://dsmtuners.com/forums/showthread.php?t=240904&highlight=egt*


The unusual readings could mean a fuctuation in timing. Check on your spark plugs and spark plug wires. You can also check the condition of the EGT probe.

 

[weith1111]

Good post DSMunknown. The placement of the probe can have a dramatic effect as well. Is yours in runner #1?

You need to log your timing to really find out what's going on. An EGT is only an indicator that you need to check something out.

 

[endlessMyk]

Thanks guys. I'm gonna do some testing tomorrow and see what's going on. I always mix stuff up, runner 1-the one closest to timing belt, right? If so, yes.

 

[DSMunknown]

runner 1-the one closest to timing belt, right?

That is correct.

 

[endlessMyk]

ok. so weith, why did you ask if it was on 1? I'm going out a bit later with my logger. I'll post up the results when i get back and hopefully get some feedback.

 

[Dark_Horse]

ok. so weith, why did you ask if it was on 1? I'm going out a bit later with my logger. I'll post up the results when i get back and hopefully get some feedback.

Because cylinder #1 and #2 typically run the hottest. If you had it tapped into #4 and were hitting 1600 degrees, you'd be in serious trouble.

I looked at your mod list and didn't see anything to control fuel. Do you have a DSMlink, SAFC etc?

 

[endlessMyk]

oh yeah, I have a SAFC, I thought I had that listed, guess I'll have to update .

 

[weith1111]

Generally people tap #1 because it should be the leanest (not necessarily hottest because an extremely rich condition can ignite late, even into the exhaust, being even hotter than a lean condition).

I'm just trying to get a background on things.

The best use of an EGT, IMO, is to identify something abnormal. Once you have a good tune and know what temp you should be at, the EGT will let you know if something isn't working right...just look for a deviation from your norm.

Bottom line, you need a logger to see what's going on, at minimum.

 

[endlessMyk]

Yeah, have a logger and SAFC.