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> Max EGT?
technicalninja
post Jan 7 2024, 08:02 PM
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The title is the question.

I know what to look for with water-cooled stuff.

I have no experience with air-cooled stuff yet...

What say you?

Is there a normal range?

A never exceed number?

Anyone ever use 4 thermocouples?

Was there any noticeable difference (#3 is of concern to me)?


Thoughts, tips, any data would be greatly appreciated!
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gereed75
post Jan 9 2024, 08:28 AM
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Slightly OT but telling: My son was runnning an Audi SQ5 on the street (until it got stolen). V6 turbo, chipped. He had a phone app that could read every engine parameter that the computer saw and used for tuning.

One cylinder on that engine was slightly more prone to detonation than the others, #5 or 6. Maybe because it was adjacent to the turbo and slightly hotter, also at end of fuel rail, maybe tended leaner, whatever, but as it detonated the computer reduced advance in that cylinder only, not a lot. About halve a degree. That was enough.

Two points - they don’t use AFR. or EGT. They use individual knock sensors on each cylinder. And secondly they did not control it using fuel flow, they use timing.

That tells you a lot about balancing cylinders and what parameters are important and effective

So assuming your cooling system is up to par, and that is very important. And your mixtures are good (AFR correct) and no mechanical problems - then timing is super important to controlling CHT .

One or two degrees really matter. Too high and the ICP goes up, stress goes up, CHT goes up and you make LESS POWER.
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Posts in this topic
technicalninja   Max EGT?   Jan 7 2024, 08:02 PM
Mikey914   In aircraft it’s around 1450. Technique is to l...   Jan 8 2024, 12:31 AM
technicalninja   Is that an air-cooled aircraft? Seems hot to me, ...   Jan 8 2024, 12:59 AM
GregAmy   What's your goal with installing EGTs? I...   Jan 8 2024, 07:00 AM
gereed75   I also come from an aviation background. What Greg...   Jan 8 2024, 07:54 AM
stownsen914   Decades ago, we didn't have reasonably priced ...   Jan 8 2024, 12:52 PM
VaccaRabite   I don't know that max EGT matter much, so long...   Jan 8 2024, 08:54 AM
gereed75   Rich helps keep CHT low. Lean can also produce low...   Jan 8 2024, 10:25 AM
technicalninja   CHT is first in my air-cooled book. I have never u...   Jan 8 2024, 12:36 PM
technicalninja   Bingo! That's more like what I was expecti...   Jan 8 2024, 01:29 PM
ChrisFoley   When I was racing, I was ok with my EGTs going up ...   Jan 8 2024, 02:09 PM
ChrisFoley   1200F is super rich and probably giving up a lot o...   Jan 8 2024, 02:10 PM
gereed75   No direct experience with Porsche but I agree that...   Jan 8 2024, 02:19 PM
ChrisFoley   Chris, were you running 4 sensors and if so could...   Jan 8 2024, 03:32 PM
technicalninja   When I was racing, I was ok with my EGTs going up...   Jan 8 2024, 03:03 PM
gereed75   Cool comparison - 1350-1375 is where I run my Lyco...   Jan 8 2024, 03:20 PM
mb911   Cool comparison - 1350-1375 is where I run my Lyc...   Jan 9 2024, 06:20 AM
technicalninja   No direct experience with Porsche but I agree tha...   Jan 8 2024, 03:25 PM
VaccaRabite   @technicalninja I did that BRIEFLY on my old 20...   Jan 9 2024, 02:24 PM
ChrisFoley   Aerospace Logic changed the standard 5 second scan...   Jan 8 2024, 03:36 PM
technicalninja   Just dying to know. Delta across the CHT sensors?...   Jan 8 2024, 04:23 PM
ChrisFoley   Just dying to know. Delta across the CHT sensors...   Jan 9 2024, 05:17 AM
wndsrfr   For my 2316 I put in 4 TC's because I could an...   Jan 8 2024, 08:04 PM
technicalninja   Sounds great! Thanks for the clips. Couple of...   Jan 8 2024, 08:44 PM
gereed75   Slightly OT but telling: My son was runnning an Au...   Jan 9 2024, 08:28 AM
Root_Werks   Usually run low 1300's on my O200 in cruise. ...   Jan 9 2024, 10:00 AM
gereed75   There is a lot more that could be discussed about ...   Jan 9 2024, 12:14 PM
technicalninja   There is a lot more that could be discussed about...   Jan 9 2024, 01:20 PM
technicalninja   PM sent Appreciate the additional data. 30 is en...   Jan 9 2024, 02:38 PM
technicalninja   Thread took a turn I didn't expect... Zach c...   Jan 9 2024, 11:09 PM
VaccaRabite   Something to consider... Microsquirt (which uses ...   Jan 10 2024, 10:21 AM
technicalninja   Something to consider... Microsquirt (which uses...   Jan 10 2024, 01:08 PM
stownsen914   It must have been 1300 degrees I was remembering, ...   Jan 12 2024, 07:23 AM


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