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EGT Probe Installation

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lwhitlow

Joined: 15 Jan 2006
Posts: 76
Location: Valparaiso Indiana

Posted: Sat Jan 31, 2009 9:37 pm Post subject: EGT Probe Installation

Ok  I'm Stumped



The manual says to install the EGT Probe 100mm from the flange



Since the pipe is curved where am I making this measurement?



Anyone got any insight or a pic to help a feller out??



Thanks



Larry Whitlow

601XL Jabiru 3300

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BobsV35B(at)aol.com
Guest

Posted: Sun Feb 01, 2009 6:20 am Post subject: EGT Probe Installation

Good Morning Larry,

  

 Not a big deal. You can measure on the side, front, or back. The primary  thing is to have the probe location consistent from cylinder to cylinder.   Even then, there will be variances. 

  

 If the carburetor, or other fuel control device, you are using allows  leaning you could run a slow lean check and see just where each cylinder hits  it's peak EGT, but with the Bing, I have found no way to make such a  check.

  

 Without a lean check, just make note of where they seem to run, then try to  notice changes in the balance between cylinders.

  

 Happy  Skies



Old Bob

AKA

Bob Siegfried

Ancient Aviator

628 West 86th  Street

Downers Grove, IL 60516

630 985-8502 

Stearman  N3977A

Brookeridge Air Park LL22   

  In a message dated 2/1/2009 12:04:25 A.M. Central Standard Time,  ldwhitlow(at)comcast.net writes:

  	  Quote: 	
		  -->    JabiruEngine-List message posted by: "lwhitlow"    <ldwhitlow(at)comcast.net>



Ok  I'm Stumped



The manual    says to install the EGT Probe 100mm from the flange



Since the pipe is    curved where am I making this measurement?



Anyone got any insight or a    pic to help a feller out??



Thanks



Larry Whitlow

601XL Jabiru    3300





Read this topic online    here:



http://forums.matronics.com/viewtopic.php?p=227956#227956

	




 Great Deals on Dell Laptops. Starting at $499.

  [quote][b]

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jeffrey_davidson(at)earth
Guest

Posted: Sun Feb 01, 2009 6:40 am Post subject: EGT Probe Installation

Larry,

	The exhaust pipe has changed over the years, but on mine with three

separate pipes all the way from the exhaust port to the muffler on each side

(3300), there was enough straight pipe from the flange at the exhaust port

to measure down 100 mm and drill a hole for the EGT probe.  I don't have a

picture handy, but I'll try to remember to take one today.

      Jeff Davidson

<snip>



The manual says to install the EGT Probe 100mm from the flange



Since the pipe is curved where am I making this measurement?



<snip>

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dhonabach

Joined: 19 Jan 2009
Posts: 13

Posted: Sun Feb 01, 2009 7:37 am Post subject: EGT Probe Installation

I measured mine using a fabric tape and split the difference around the

curves. 



While I'm not sure if the location really makes a big difference

although I think way too close would be bad ?, just make sure you drill

the hole for it in a place that allows the probe to stick straight in

and not be forced to bend to a side. Apparently from other comments, if

the EGT probe doesn't go straight into the exhaust pipe, the valves

being read/sent will be wrong.



Don



--

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dredmoody(at)cox.net
Guest

Posted: Sun Feb 01, 2009 8:18 am Post subject: EGT Probe Installation

The manual says to install the EGT Probe 100mm from  the flange

      

       Since the pipe is curved where am I making this  measurement?

       

      Anyone got any insight or a pic to help a  feller out??

      

Stick the measuring tape up alongside the pipe  all the way up to the flange then measure along the center of the side of the  pipe around the curve to the 100mm point. Don't measure the outside radius of  the bend or the inside... go halfway between the two and measure along that  line. The measurement is not critical but getting all the sensors nearly the  same is important. Does that help?

  

 Ed

   [quote][b]

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lwhitlow

Joined: 15 Jan 2006
Posts: 76
Location: Valparaiso Indiana

Posted: Sun Feb 01, 2009 11:06 am Post subject: Re: EGT Probe Installation

Help it does Ed,



The consensus seems to be make sure you do it the same way on all and try and measure along the same path on all pipes and look for 100mm 



I have to keep telling myself, " I'm not building a F-16 here a mm wont usually make a difference. But there are a few places that a mm means the difference in getting the nut on 



Larry



 	  dredmoody(at)cox.net wrote: 	
		  The manual says to install the EGT Probe 100mm from  the flange

      

       Since the pipe is curved where am I making this  measurement?

       

      Anyone got any insight or a pic to help a  feller out??

      

Stick the measuring tape up alongside the pipe  all the way up to the flange then measure along the center of the side of the  pipe around the curve to the 100mm point. Don't measure the outside radius of  the bend or the inside... go halfway between the two and measure along that  line. The measurement is not critical but getting all the sensors nearly the  same is important. Does that help?

  

 Ed

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tjs22t(at)verizon.net
Guest

Posted: Sun Feb 01, 2009 12:20 pm Post subject: EGT Probe Installation

 	  Quote: 	
		  

 The manual says to install the EGT Probe 100mm from the flange



 Since the pipe is curved where am I making this measurement?



 Anyone got any insight or a pic to help a feller out??




	


Larry,



How about taking a piece of single strand heavy wiring (maybe 10AWG) and 

cutting a pie 100mm long.  Then place it on a side of the pipe midway 

between the inside and outside bend (does that make sense?  Someone else 

said about the same thing.)  Voila!!! exactly 100mm from wherever you 

measured.  Worked here.  Coat hanger wire would work too.



CAVU  jeff   HDS/3300  Mechanicsburg, PA

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DaveG601XL

Joined: 27 Oct 2006
Posts: 351
Location: Cincinnati, Oh

Posted: Mon Feb 02, 2009 8:53 am Post subject: Re: EGT Probe Installation

The installation manual I have, dated 2006, says 100mm is the distance to use for the EGT probe palcement.  The Jabiru engine tuning Service Bulletin JSB018-1, dated October, 2007, says to use 120mm.  I don't have my Oshkosh notes with me, but I remember Pete K. saying in the Jabiru forum there that 120mm was the new recommended location.  I used 120mm on my installation.



Good luck,

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David Gallagher
Cincinnati, OH area

Thruster87

Joined: 16 Apr 2008
Posts: 193
Location: Australia

Posted: Tue Apr 28, 2009 12:29 am Post subject: Re: EGT Probe Installation

On my 2004 solid lifter engine I can only manage 50mm or  2" as it is the older style exhaust system which has the  180 deg bend Cheers

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