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EGT Probe position

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bo124rs(at)hotmail.com
Guest

Posted: Tue Sep 19, 2006 6:54 am Post subject: EGT Probe position

I'm getting ready to drill the holes in my Vetterman exhaust for 

installation of the Dynon supplied EGT probes.  The intake tubes eliminate 

positioning the probes pointing directly rearward so some offset is needed.  

What is the desired positioning of the probe, ie., probe pointing outside of 

the intake tubes or inside the intake tube.  My thoughts are to go inside of 

the tubes, making a cleaning wire run to the thermocouple harness wires.  

Any thoughts, pics or other ideas?



Also, on my exhaust the #1 exhaust has a elbow bend about 2" below the 

flange.  To position the probe on a flap spot I have to go past the bend.  

The distance brings the other three probes right at the intersection points 

of the joints.  If they are within say, two inches of #1 but 2,3 & 4 are the 

same distance surely I won't have a noticable difference in actual EGT 

between #1 and the other 3.  Care to comment??



Dana Overall

Richmond, KY i39

RV-7 slider, Imron black, "Black Magic"

O 360 A1A, C/S C2YK-1BF/F7666A4

http://rvflying.tripod.com/id30.html

do not archive



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FLYaDIVE(at)AOL.COM
Guest

Posted: Tue Sep 19, 2006 7:35 am Post subject: EGT Probe position

In a message dated 9/19/06 10:55:55 AM Eastern Daylight Time, 

bo124rs(at)hotmail.com writes:



 	  Quote: 	
		   The distance brings the other three probes right at the intersection points 

  of the joints.  If they are within say, two inches of #1 but 2,3 & 4 are 

the 
	


 	  Quote: 	
		    same distance surely I won't have a noticable difference in actual EGT 

  between #1 and the other 3.  Care to comment??

  

  Dana Overall

  Richmond, KY i39

===========================
	


Dana:



The EGT is only a reference item.  So as long as you keep the reference the 

same on all probes you will do OK.  What is meant by reference is that when 

comparing to other peoples systems the readings will vary.  Just try to keep the 

probe location as uniform as posable on your system.  Yes, 1 & 2" differences 

will be noticed.  Also difference will be noted between cylinders especially 

on Lycoming engines that are carboratored since the spider distribution system 

is extremely poor.



Barry

"Chop'd Liver"

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HCRV6(at)comcast.net
Guest

Posted: Tue Sep 19, 2006 8:30 am Post subject: EGT Probe position

FWIW I placed my #1 EGT probe just above the bend in the Vettermann exhaust, also on an O-360A1A BTW, which put it just about 2 inches down from the exhaust port and located the others at the same distance.  All the probes point aft and slightly outboard to provide clearance for removing plugs.  This has worked out very well for me so far.  I believe you will get more useful information relative to engine performance if the probes are located 

 the same distance from the exhaust ports.

  

 Harry Crosby 

RV-6 N16CX, 265 hours

  

 [quote]-------------- Original message -------------- 

From: "Dana Overall" <bo124rs(at)hotmail.com> 



 	  Quote: 	
		   --> RV-List message posted by: "Dana Overall" 

 

 I'm getting ready to drill the holes in my Vetterman exhaust for 

 installation of the Dynon supplied EGT probes. The intake tubes eliminate 

 positioning the probes pointing directly rearward so some offset is needed. 

 What is the desired positioning of the probe, ie., probe pointing outside of 

 the intake tubes or inside the intake tube. My thoughts are to go inside of 

 the tubes, making a cleaning wire run to the thermocouple harness wires. 

 Any thoughts, pics or other ideas? 

 

 Also, on my exhaust the #1 exhaust has a elbow bend about 2" below the 

 flange. To position the probe on a flap spot I have to go past the bend.   

&g  cs Lis  on

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bo124rs(at)hotmail.com
Guest

Posted: Tue Sep 19, 2006 5:49 pm Post subject: EGT Probe position

Thanks gang, got lots of emails off list with pics and some showed exactly 

what I needed.



As always..........great gang, Thanks.



Dana Overall

Richmond, KY i39

RV-7 slider, Imron black, "Black Magic"

O 360 A1A, C/S C2YK-1BF/F7666A4

http://rvflying.tripod.com/id30.html

do not archive



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Doug Gray

Joined: 10 Jan 2006
Posts: 112
Location: Sydney, Australia

Posted: Tue Sep 19, 2006 11:40 pm Post subject: EGT Probe position

Hey, folks...

Why go off list?  I am soon to install engine and would like to see

representative photos.

Doug Gray



On Tue, 2006-09-19 at 21:47 -0400, Dana Overall wrote:

 	  Quote: 	
		   

 

 Thanks gang, got lots of emails off list with pics and some showed exactly 

 what I needed.

 

 As always..........great gang, Thanks.

 

 Dana Overall

 Richmond, KY i39

 RV-7 slider, Imron black, "Black Magic"

 O 360 A1A, C/S C2YK-1BF/F7666A4

 http://rvflying.tripod.com/id30.html

 do not archive

 

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