 Max EGT? |
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| technicalninja |
 Jan 7 2024, 08:02 PM
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Senior Member  Group: Members Posts: 1,290 Joined: 31-January 23 From: Granbury Texas Member No.: 27,135 Region Association: Southwest Region 
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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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| wndsrfr |
Jan 8 2024, 08:04 PM
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Senior Member Group: Members Posts: 1,430 Joined: 30-April 09 From: Rescue, Virginia Member No.: 10,318 Region Association: MidAtlantic Region
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For my 2316 I put in 4 TC's because I could and to monitor for a cylinder going lean for whatever reason. This engine is fuel & spark controlled with SDS so I created the map by dyno tuning so wanted to be watchful for not going lean. Wideband O2 is there of course. Here's the install, you can pick out the TC's on the headers if you squint....
 Here's the readout at idle.....  What I watched for was to not exceed 1250 at sustained WOT to avoid detonation risk but will commonly see 1350 at light throttle sustained around 3500rpm. Remember I'm on SDS and at light throttle I'm on closed loop so AFR's are around 14:1. So then the SDS is set to go off of closed loop with throttle position over about halfway open and revert to the coded in fueling map to keep AFR's quite rich at WOT. I'll attach a couple of Youtube clips where I did a brake dyno run on the highway by getting up to 3'rd (or 4th) gear about 4000 rpm and flooring it while holding the brake pedal to keep it at thata rpm & watch the AFR's. Sooo...that's my story on 4 EGT's...Oh yeah, turn up the volume!! https://www.youtube.com/watch?v=A4jyPRQaVNw https://www.youtube.com/watch?v=lNUNWDupcWk |
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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 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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