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Hot EGT on # 1 Cylinder

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kearney

Joined: 20 Sep 2008
Posts: 563

Posted: Sun Mar 08, 2015 7:00 am Post subject: Hot EGT on # 1 Cylinder

Hi



I have been putting hours on my new engine and in the process have noticed something that may or may not be odd. While taxing I try to lean the engine to keep the plugs from fouling. I have noticed that the #1 cylinder goes hot far faster than the others.



Fr example, when leaning on the ground yesterday cyls #2-6 were +/- 1050 F while number 1 spiked quickly to 1385F. I simply en-richened somewhat to bring it down.



I am perplexed as to why CYL # 1 would react tgis way. 



In the air I don't see this type of behavior, only on the ground.



Any wisdom from the intelligentsia? Do I even care about this?



Cheers



Les

rleffler

Joined: 05 Nov 2006
Posts: 680

Posted: Sun Mar 08, 2015 7:22 am Post subject: Hot EGT on # 1 Cylinder

What are your cht's?    I wouldn't worry about egt temps on the ground.



Sent from my iPad



 	  Quote: 	
		   On Mar 8, 2015, at 11:00 AM, kearney <kearney(at)shaw.ca> wrote:

 

 

 

 Hi

 

 I have been putting hours on my new engine and in the process have noticed something that may or may not be odd. While taxing I try to lean the engine to keep the plugs from fouling. I have noticed that the #1 cylinder goes hot far faster than the others.

 

 Fr example, when leaning on the ground yesterday cyls #2-6 were +/- 1050 F while number 1 spiked quickly to 1385F. I simply en-richened somewhat to bring it down.

 

 I am perplexed as to why CYL # 1 would react tgis way. 

 

 In the air I don't see this type of behavior, only on the ground.

 

 Any wisdom from the intelligentsia? Do I even care about this?

 

 Cheers

 

 Les

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=439153#439153

_________________
Bob Leffler
N410BL - Phase I
http://mykitlog.com/rleffler

cooprv7(at)yahoo.com
Guest

Posted: Sun Mar 08, 2015 7:32 am Post subject: Hot EGT on # 1 Cylinder

Les,

    Many people have experienced hotter temps on the front two cylinders due to the design of the dam in front being too large and after cutting it back the problem is solved.  Seems like more of an issue in the air, but could be impacting you as well.  Might be leaning a bit too much on taxi as well, just a thought.  Might need to go for a slightly larger injector on #1 as well, but your in-flight numbers would be what really drives that change.



Enjoy your testing!

Marcus

 	  Quote: 	
		   On Mar 8, 2015, at 12:00 PM, kearney <kearney(at)shaw.ca> wrote:

 

 

 

 Hi

 

 I have been putting hours on my new engine and in the process have noticed something that may or may not be odd. While taxing I try to lean the engine to keep the plugs from fouling. I have noticed that the #1 cylinder goes hot far faster than the others.

 

 Fr example, when leaning on the ground yesterday cyls #2-6 were +/- 1050 F while number 1 spiked quickly to 1385F. I simply en-richened somewhat to bring it down.

 

 I am perplexed as to why CYL # 1 would react tgis way. 

 

 In the air I don't see this type of behavior, only on the ground.

 

 Any wisdom from the intelligentsia? Do I even care about this?

 

 Cheers

 

 Les

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=439153#439153

kearney

Joined: 20 Sep 2008
Posts: 563

Posted: Sun Mar 08, 2015 7:42 am Post subject: Re: Hot EGT on # 1 Cylinder

Rob / Marcus



Thanks for the note. My CHTs, are fine, including in flight. I used silicon to seal the baffles and have followed the list advice as to how to keep the front cyls (#1 & 2) cool.



My issue is strictly to do with taxing. Perhaps I am being too aggressive with my ground leaning,



Cheers



Les

carl.froehlich(at)verizon
Guest

Posted: Sun Mar 08, 2015 8:16 am Post subject: Hot EGT on # 1 Cylinder

Yep - same issue with my  #3 cylinder.



After balancing the cylinder fuel injectors, all cylinders reach peak EGT

within 0.1 GPH fuel flow (standard cruise conditions, 2350 RPM and MP 23" or

whatever I can get at altitude).  On the ground when I lean for taxi (just

enough gas to keep the engine running) all EGTs climb but #3 climbs more.



I talked to Air Flow Performance on this and he asked me to do a high power

lean run to verify the cylinders still peak at about the same fuel flow -

they do.  He ask me to do this to eliminate any issue with the spider (e.g.

spring/flow/clog).



Note - CHTs while leaning on the ground really don't change much.



So - if not done already recommend you proceed with the in flight injector

balancing, then take a look at where you are after that.  Injectors of

various sizes are available from Air Flow Performance for $21 each.  For

reference, the standard injector in a Vans IO-540 is 0.028".  For my engine,

this is the injector set up I ended up with (your engine will be different):

#1 (.028)	#2 (.029)	#3 (.027)     #4 (.027)	     #5 (.029)	  #6

(.0275)



Before balance I had a 0.8 GPH spread between the cylinders for fuel flow at

peak EGT.  Lean of peak operation yielded a very rough engine.  Now standard

cruise is 20-30 degrees LOP, 11.5 GPH and CHTs are 30 degrees cooler than

when ROP.



Carl



--

jump2(at)sbcglobal.net
Guest

Posted: Sun Mar 08, 2015 8:23 am Post subject: Hot EGT on # 1 Cylinder

Have you checked for intake leak on that cyl. Little leak at idle will show up as high temp since it'll leaned fuel mixture out and at full power it is small enough you might not notice it. What's your mp at idle? If it's around 15" -17" you prob. have a leak.

Just my thoughts and as we know it's not worth much.

Patrick Thyssen



Sent from my iPad



 	  Quote: 	
		   On Mar 8, 2015, at 10:42 AM, kearney <kearney(at)shaw.ca> wrote:

 

 

 

 Rob / Marcus

 

 Thanks for the note. My CHTs, are fine, including in flight. I used silicon to seal the baffles and have followed the list advice as to how to keep the front cyls (#1 & 2) cool.

 

 My issue is strictly to do with taxing. Perhaps I am being too aggressive with my ground leaning,

 

 Cheers

 

 Les

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=439160#439160

amekler

Joined: 07 Oct 2010
Posts: 164

Posted: Sun Mar 08, 2015 8:25 am Post subject: Hot EGT on # 1 Cylinder

You might try cleaning that injector or swapping it with the richest injector

Alan



Sent from my iPhone



 	  Quote: 	
		   On Mar 8, 2015, at 11:27 AM, Marcus Cooper <cooprv7(at)yahoo.com> wrote:

 

 

 

 Les,

    Many people have experienced hotter temps on the front two cylinders due to the design of the dam in front being too large and after cutting it back the problem is solved.  Seems like more of an issue in the air, but could be impacting you as well.  Might be leaning a bit too much on taxi as well, just a thought.  Might need to go for a slightly larger injector on #1 as well, but your in-flight numbers would be what really drives that change.

 

 Enjoy your testing!

 Marcus

 

 

> On Mar 8, 2015, at 12:00 PM, kearney <kearney(at)shaw.ca> wrote:

> 

> 

> 

> Hi

> 

> I have been putting hours on my new engine and in the process have noticed something that may or may not be odd. While taxing I try to lean the engine to keep the plugs from fouling. I have noticed that the #1 cylinder goes hot far faster than the others.

> 

> Fr example, when leaning on the ground yesterday cyls #2-6 were +/- 1050 F while number 1 spiked quickly to 1385F. I simply en-richened somewhat to bring it down.

> 

> I am perplexed as to why CYL # 1 would react tgis way. 

> 

> In the air I don't see this type of behavior, only on the ground.

> 

> Any wisdom from the intelligentsia? Do I even care about this?

> 

> Cheers

> 

> Les

> 

> 

> 

> 

> Read this topic online here:

> 

> http://forums.matronics.com/viewtopic.php?p=439153#439153

Bob Turner

Joined: 03 Jan 2009
Posts: 885
Location: Castro Valley, CA

Posted: Sun Mar 08, 2015 8:29 am Post subject: Re: Hot EGT on # 1 Cylinder

check the intake gaskets on #1 for any sign of leaks. Do you see this behavior in the air at low throttle settings? At low MP there is a bigger differential between outside air presure and MP making leaks more obvious.

_________________
Bob Turner
RV-10 QB

Tim Olson

Joined: 25 Jan 2007
Posts: 2872

Posted: Sun Mar 08, 2015 8:34 am Post subject: Hot EGT on # 1 Cylinder

One note:

There is no such thing as leaning too aggressively on the ground for taxi.  You SHOULD be leaning it SO FAR that if you try to get more than 1500-1800 RPM the engine stumbles and shudders and wants to die. That way you cannot possibly take off without going rich, and you are not leaving extra unburned fuel to foul the plugs and cylinders.

Tim



 	  Quote: 	
		   On Mar 8, 2015, at 10:42 AM, kearney <kearney(at)shaw.ca> wrote:

 

 

 

 Rob / Marcus

 

 Thanks for the note. My CHTs, are fine, including in flight. I used silicon to seal the baffles and have followed the list advice as to how to keep the front cyls (#1 & 2) cool.

 

 My issue is strictly to do with taxing. Perhaps I am being too aggressive with my ground leaning,

 

 Cheers

 

 Les

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=439160#439160

kearney

Joined: 20 Sep 2008
Posts: 563

Posted: Sun Mar 08, 2015 8:48 am Post subject: Re: Hot EGT on # 1 Cylinder

Hi Carl



I have done the GAMI test. If I am interpreting the data correctly, my front two cyls peak at a FF of .5 & .7 GPH sooner than the remaining 4 which all peak within .1 GPH of each other.  I think I'll give AFP a call and discuss. 



I was wondering if I should consider GAM injectors but if I can get the same result from AFP injectors at a fraction of the cost, that would be much, much better.



Cheers



Les



 	  carl.froehlich(at)verizon wrote: 	
		  Yep - same issue with my  #3 cylinder.



After balancing the cylinder fuel injectors, all cylinders reach peak EGT

within 0.1 GPH fuel flow (standard cruise conditions, 2350 RPM and MP 23" or

whatever I can get at altitude).  On the ground when I lean for taxi (just

enough gas to keep the engine running) all EGTs climb but #3 climbs more.



I talked to Air Flow Performance on this and he asked me to do a high power

lean run to verify the cylinders still peak at about the same fuel flow -

they do.  He ask me to do this to eliminate any issue with the spider (e.g.

spring/flow/clog).



Note - CHTs while leaning on the ground really don't change much.



So - if not done already recommend you proceed with the in flight injector

balancing, then take a look at where you are after that.  Injectors of

various sizes are available from Air Flow Performance for $21 each.  For

reference, the standard injector in a Vans IO-540 is 0.028".  For my engine,

this is the injector set up I ended up with (your engine will be different):

#1 (.028)	#2 (.029)	#3 (.027)     #4 (.027)	     #5 (.029)	  #6

(.0275)



Before balance I had a 0.8 GPH spread between the cylinders for fuel flow at

peak EGT.  Lean of peak operation yielded a very rough engine.  Now standard

cruise is 20-30 degrees LOP, 11.5 GPH and CHTs are 30 degrees cooler than

when ROP.



Carl



--

kearney

Joined: 20 Sep 2008
Posts: 563

Posted: Sun Mar 08, 2015 8:51 am Post subject: Re: Hot EGT on # 1 Cylinder

Hi Alan



I should have mentioned that I have done both already with no change. I also plan to confirm the EGT distance from the valve as well as swap probes t see if it is a probe variance.



Cheers



Les



 	  amekler wrote: 	
		  You might try cleaning that injector or swapping it with the richest injector

Alan



Sent from my iPhone



 	  Quote: 	
		   On Mar 8, 2015, at 11:27 AM, Marcus Cooper <cooprv7> wrote:

 

 

 

 Les,

    Many people have experienced hotter temps on the front two cylinders due to the design of the dam in front being too large and after cutting it back the problem is solved.  Seems like more of an issue in the air, but could be impacting you as well.  Might be leaning a bit too much on taxi as well, just a thought.  Might need to go for a slightly larger injector on #1 as well, but your in-flight numbers would be what really drives that change.

 

 Enjoy your testing!

 Marcus

 

 

> On Mar 8, 2015, at 12:00 PM, kearney <kearney> wrote:

> 

> 

> 

> Hi

> 

> I have been putting hours on my new engine and in the process have noticed something that may or may not be odd. While taxing I try to lean the engine to keep the plugs from fouling. I have noticed that the #1 cylinder goes hot far faster than the others.

> 

> Fr example, when leaning on the ground yesterday cyls #2-6 were +/- 1050 F while number 1 spiked quickly to 1385F. I simply en-richened somewhat to bring it down.

> 

> I am perplexed as to why CYL # 1 would react tgis way. 

> 

> In the air I don't see this type of behavior, only on the ground.

> 

> Any wisdom from the intelligentsia? Do I even care about this?

> 

> Cheers

> 

> Les

> 

> 

> 

> 

> Read this topic online here:

> 

> http://forums.matronics.com/viewtopic.php?p=439153#439153

carl.froehlich(at)verizon
Guest

Posted: Sun Mar 08, 2015 9:21 am Post subject: Hot EGT on # 1 Cylinder

If a cylinder peaks early it is not getting enough fuel compared with the

other cylinders.  So you can either put a larger nozzle in #1 and #2, or

leave them at 0.028 and put smaller ones in your other cylinders (like

0.027").



If you are striving for around 12 GPH in cruise, then I suspect AFP will

recommend going smaller in cylinders 3, 4, 5 and 6.  Keep in mind this is an

iterative process.  Change the injectors in the one or two cylinders that

are the most out, do another data run, repeat.  It took me three runs.  I

have the SkyView system so it's automatic data collection really made this

easy.  AFP makes injectors in wide range, typical increment is 0.0005"



While I have no issue with GAMI injectors, I never saw the value in the very

high price when the same result is achievable using $21 AFP nozzles.



Carl



--

rv10flyer(at)live.com
Guest

Posted: Sun Mar 08, 2015 11:46 am Post subject: Hot EGT on # 1 Cylinder

Les

I had the same issues. Thanks to Don McDonald, initially and David Brown (GAMI instructor) and his knowledge he helped interpret my settings and I was able to get everything to .3 from richest to leanest.

What I discovered is

You change one injector  the others move around as well. 

You cut an air dam and the LOP goes out the window. 

I always had a hot #6 cyl and my #1 ran second hottest. When I cut down the dam in front of #1, temps went down across the board. When I got the LOP final set the temps all run much cooler. 

My suggestion is talk to Don and hear his suggestions, probably tell you to get .0270 or ..0275 for the four and see how everything balances after that change.

It's worth the effort!

Pascal

Sent from my iPad

 	  Quote: 	
		   On Mar 8, 2015, at 9:54 AM, kearney <kearney(at)shaw.ca> wrote:

 Hi Carl

 I have done the GAMI test. If I am interpreting the data correctly, my front two cyls peak at a FF of .5 & .7 GPH sooner than the remaining 4 which all peak within .1 GPH of each other.  I think I'll give AFP a call and discuss. 

 I was wondering if I should consider GAM injectors but if I can get the same result from AFP injectors at a fraction of the cost, that would be much, much better.

 Cheers

 Les

 carl.froehlich(at)verizon wrote:

> Yep - same issue with my  #3 cylinder.

> 

> After balancing the cylinder fuel injectors, all cylinders reach peak EGT

> within 0.1 GPH fuel flow (standard cruise conditions, 2350 RPM and MP 23" or

> whatever I can get at altitude).  On the ground when I lean for taxi (just

> enough gas to keep the engine running) all EGTs climb but #3 climbs more.

> 

> I talked to Air Flow Performance on this and he asked me to do a high power

> lean run to verify the cylinders still peak at about the same fuel flow -

> they do.  He ask me to do this to eliminate any issue with the spider (e.g.

> spring/flow/clog).

> 

> Note - CHTs while leaning on the ground really don't change much.

> 

> So - if not done already recommend you proceed with the in flight injector

> balancing, then take a look at where you are after that.  Injectors of

> various sizes are available from Air Flow Performance for $21 each.  For

> reference, the standard injector in a Vans IO-540 is 0.028".  For my engine,

> this is the injector set up I ended up with (your engine will be different):

> #1 (.028)    #2 (.029)    #3 (.027)     #4 (.027)         #5 (.029)      #6

> (.0275)

> 

> Before balance I had a 0.8 GPH spread between the cylinders for fuel flow at

> peak EGT.  Lean of peak operation yielded a very rough engine.  Now standard

> cruise is 20-30 degrees LOP, 11.5 GPH and CHTs are 30 degrees cooler than

> when ROP.

> 

> Carl

> 

> --

 Read this topic online here:

 http://forums.matronics.com/viewtopic.php?p=439167#439167

taildragon(at)msn.com
Guest

Posted: Sun Mar 08, 2015 12:08 pm Post subject: Hot EGT on # 1 Cylinder

I'll go with Patrick on this one. I had high EGT on #4 on an idling brand new factory fresh IO-540! Turned out to be an "out of round" intake manifold so that the hose was not sealing completely. We found it by spraying with a light mist bottle while at idle and noticing the EGT change. Once we rounded out the manifold with a rounding plug, seal was complete and all was fine.

Roger Standley

N291RV

 	  Quote: 	
		   From: jump2(at)sbcglobal.net

 Subject: Re: Re: Hot EGT on # 1 Cylinder

 Date: Sun, 8 Mar 2015 11:16:17 -0500

 To: rv10-list(at)matronics.com

 --> RV10-List message posted by: Patrick Thyssen <jump2(at)sbcglobal.net>

 Have you checked for intake leak on that cyl. Little leak at idle will show up as high temp since it'll leaned fuel mixture out and at full power it is small enough you might not notice it. What's your mp at idle? If it's around 15" -17" you prob. have a leak.

 Just my thoughts and as we know it's not worth much.

 Patrick Thyssen

 Sent from my iPad

 > On Mar 8, 2015, at 10:42 AM, kearney <kearney(at)shaw.ca> wrote:

 > 

 > --> RV10-List message posted by: "kearney" <kearney(at)shaw.ca>

 > 

 > Rob / Marcus

 > 

 > Thanks for the note. My CHTs, are fine, including in flight. I used silicon to seal the baffles and have followed the list advice as to how to keep the front cyls (#1 & 2) cool.

 > 

 > My issue is strictly to do with taxing. Perhaps I am being too aggressive with my ground leaning,

 > 

 > Cheers

 > 

 > Les

 > 

 > 

 > 

 > 

 > Read this topic online here:

 > 

 > http://forums.matronics.com/viewtopic.php?p=439160#439160

 > 

 > 

 > 

 > 

 > 

 > 

 > 

 > 

 > 

 > 

 <======================

&gt=======

 	  Quote: 	

  [quote][b]

Kellym

Joined: 10 Jan 2006
Posts: 1705
Location: Sun Lakes AZ

Posted: Sun Mar 08, 2015 12:31 pm Post subject: Hot EGT on # 1 Cylinder

I agree with the possibility of small leak as a cause. The other 

possibility, but likely to show up at all power settings is a single 

spark plug firing intermittently or not at all.

Soap bubbles is one method. Another now being used in auto industry is a 

smoke generator that floods the manifold with smoke under slight 

pressure and you look for any escaping. Supposed to be more sensitive to 

small leaks than soap bubbles.

On 3/8/2015 1:05 PM, Roger Standley wrote:

 	  Quote: 	
		   I'll go with Patrick on this one. I had high EGT on #4 on an idling 

 brand new factory fresh IO-540! Turned out to be an "out of round" 

 intake manifold so that the hose was not sealing completely. We found 

 it by spraying with a light mist bottle while at idle and noticing the 

 EGT change. Once we rounded out the manifold with a rounding plug, 

 seal was complete and all was fine.

 Roger Standley

 N291RV

 > From: jump2(at)sbcglobal.net

 > Subject: Re: Re: Hot EGT on # 1 Cylinder

 > Date: Sun, 8 Mar 2015 11:16:17 -0500

 > To: rv10-list(at)matronics.com

 >

 > 

 >

 > Have you checked for intake leak on that cyl. Little leak at idle 

 will show up as high temp since it'll leaned fuel mixture out and at 

 full power it is small enough you might not notice it. What's your mp 

 at idle? If it's around 15" -17" you prob. have a leak.

 > Just my thoughts and as we know it's not worth much.

 > Patrick Thyssen

 >

 > Sent from my iPad

 >

 > > On Mar 8, 2015, at 10:42 AM, kearney <kearney(at)shaw.ca> wrote:

 > >

 > > 

 > >

 > > Rob / Marcus

 > >

 > > Thanks for the note. My CHTs, are fine, including in flight. I 

 used silicon to seal the baffles and have followed the list advice as 

 to how to keep the front cyls (#1 & 2) cool.

 > >

 > > My issue is strictly to do with taxing. Perhaps I am being too 

 aggressive with my ground leaning,

 > >

 > > Cheers

 > >

 > > Les

 > >

 > >

 > >

 > >

 > > Read this topic online here:

 > >

 > > http://forums.matronics.com/viewtopic.php?p=439160#439160

 > >

 > >

 > >

 > >

 > >

 > >

 > >

 > >

 > >

 > >

 >

 > <======================

 >=======

 >

 >

 >

 *

 *

_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor # 5286
KCHD

flying-nut(at)cfl.rr.com
Guest

Posted: Sun Mar 08, 2015 2:25 pm Post subject: Hot EGT on # 1 Cylinder

Intake leaks can be easier to spot if       you take a clean (read that word again) shop vac and hook it up to       blow air into the intake and spray soapy water over the intake       system.  You can put rags around the hose to seal it a little.        Much easier to spot bubbles than changes in EGT.

       Linn

       

       On 3/8/2015 4:05 PM, Roger Standley wrote:

     

     [quote]              I'll go with Patrick on this one. I had high EGT on         #4 on an idling brand new factory fresh IO-540! Turned out to be         an "out of round" intake manifold so that the hose was not         sealing completely. We found it by spraying with a light mist         bottle while at idle and noticing the EGT change. Once we         rounded out the manifold with a rounding plug, seal was complete         and all was fine.

          

         Roger Standley

         N291RV

          

         > From: jump2(at)sbcglobal.net (jump2(at)sbcglobal.net)

           > Subject: Re: Re: Hot EGT on # 1 Cylinder

           > Date: Sun, 8 Mar 2015 11:16:17 -0500

           > To: rv10-list(at)matronics.com (rv10-list(at)matronics.com)

           > 

           > --> RV10-List message posted by: Patrick Thyssen           <jump2(at)sbcglobal.net> (jump2(at)sbcglobal.net)

           > 

           > Have you checked for intake leak on that cyl. Little leak           at idle will show up as high temp since it'll leaned fuel           mixture out and at full power it is small enough you might not           notice it. What's your mp at idle? If it's around 15" -17" you           prob. have a leak.

           > Just my thoughts and as we know it's not worth much.

           > Patrick Thyssen

           > 

           > Sent from my iPad

           > 

           > > On Mar 8, 2015, at 10:42 AM, kearney           <kearney(at)shaw.ca> (kearney(at)shaw.ca) wrote:

           > > 

           > > --> RV10-List message posted by: "kearney"           <kearney(at)shaw.ca> (kearney(at)shaw.ca)

           > > 

           > > Rob / Marcus

           > > 

           > > Thanks for the note. My CHTs, are fine, including in           flight. I used silicon to seal the baffles and have followed           the list advice as to how to keep the front cyls (#1 & 2)           cool.

           > > 

           > > My issue is strictly to do with taxing. Perhaps I am           being too aggressive with my ground leaning,

           > > 

           > > Cheers

           > > 

           > > Les

           > > 

           > > 

           > > 

           > > 

           > > Read this topic online here:

           > > 

           > >           http://forums.matronics.com/viewtopic.php?p=439160#439160

           > > 

           > > 

           > > 

           > > 

           > > 

           > > 

           > > 

           > > 

           > > 

           > > 

           > 

           > <======================

           >=======

           > 

           > 

           > 

         

       

        	  Quote: 	
		  

	
     [b]

amekler

Joined: 07 Oct 2010
Posts: 164

Posted: Sun Mar 08, 2015 3:17 pm Post subject: Hot EGT on # 1 Cylinder

Les,I also used Don Rivera at AFP after unsuccessfully trying GAMIs. I even send my Spider back to Mattituck for recalibration.

Don had me start with his injectors.I emailed him the flight data and after 3 flights with changing injectors have a .3 gallon spread and it runs fine LOP. 

I suggest to go to his web site and collect the flight data. He is great to work with.

Also helpful is https://www.savvyanalysis.com/ to look at your data.

good luck



Alan

 	  Quote: 	
		  On Mar 8, 2015, at 12:51 PM, kearney <kearney(at)shaw.ca (kearney(at)shaw.ca)> wrote:

--> RV10-List message posted by: "kearney" <kearney(at)shaw.ca (kearney(at)shaw.ca)>Hi AlanI should have mentioned that I have done both already with no change. I also plan to confirm the EGT distance from the valve as well as swap probes t see if it is a probe variance.CheersLesamekler wrote: 	  Quote: 	
		  You might try cleaning that injector or swapping it with the richest injectorAlanSent from my iPhone 	  Quote: 	
		   On Mar 8, 2015, at 11:27 AM, Marcus Cooper  wrote: Les,    Many people have experienced hotter temps on the front two cylinders due to the design of the dam in front being too large and after cutting it back the problem is solved.  Seems like more of an issue in the air, but could be impacting you as well.  Might be leaning a bit too much on taxi as well, just a thought.  Might need to go for a slightly larger injector on #1 as well, but your in-flight numbers would be what really drives that change. Enjoy your testing! Marcus 	  Quote: 	
		  On Mar 8, 2015, at 12:00 PM, kearney  wrote:HiI have been putting hours on my new engine and in the process have noticed something that may or may not be odd. While taxing I try to lean the engine to keep the plugs from fouling. I have noticed that the #1 cylinder goes hot far faster than the others.Fr example, when leaning on the ground yesterday cyls #2-6 were +/- 1050 F while number 1 spiked quickly to 1385F. I simply en-richened somewhat to bring it down.I am perplexed as to why CYL # 1 would react tgis way. In the air I don't see this type of behavior, only on the ground.Any wisdom from the intelligentsia? Do I even care about this?CheersLesRead this topic online here:http://forums.matronics.com/viewtopic.php?p=439153#439153 	
	
	
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 [quote][b]

kearney

Joined: 20 Sep 2008
Posts: 563

Posted: Sun Mar 08, 2015 4:28 pm Post subject: Hot EGT on # 1 Cylinder

Hi Alan



I have AFP injectors / spider as well. I will give them a call after I confirm that I don't have an induction leak.I suspect that given that cyl#1 peaks first in flight, it just may be a flow issue but I need to confirm.

Cheers

Les



From: "Alan Mekler MD" <amekler(at)metrocast.net>

To: rv10-list(at)matronics.com

Sent: Sunday, March 8, 2015 5:14:01 PM

Subject: Re: Re: Hot EGT on # 1 Cylinder



Les,I also used Don Rivera at AFP after unsuccessfully trying GAMIs. I even send my Spider back to Mattituck for recalibration.

Don had me start with his injectors.I emailed him the flight data and after 3 flights with changing injectors have a .3 gallon spread and it runs fine LOP. 

I suggest to go to his web site and collect the flight data. He is great to work with.

Also helpful is https://www.savvyanalysis.com/ to look at your data.

good luck



Alan

 	  Quote: 	
		  On Mar 8, 2015, at 12:51 PM, kearney <kearney(at)shaw.ca (kearney(at)shaw.ca)> wrote:

--> RV10-List message posted by: "kearney" <kearney(at)shaw.ca (kearney(at)shaw.ca)>Hi AlanI should have mentioned that I have done both already with no change. I also plan to confirm the EGT distance from the valve as well as swap probes t see if it is a probe variance.CheersLesamekler wrote: 	  Quote: 	
		  You might try cleaning that injector or swapping it with the richest injectorAlanSent from my iPhone 	  Quote: 	
		   On Mar 8, 2015, at 11:27 AM, Marcus Cooper  wrote: Les,    Many people have experienced hotter temps on the front two cylinders due to the design of the dam in front being too large and after cutting it back the problem is solved.  Seems like more of an issue in the air, but could be impacting you as well.  Might be leaning a bit too much on taxi as well, just a thought.  Might need to go for a slightly larger injector on #1 as well, but your in-flight numbers would be what really drives that change. Enjoy your testing! Marcus 	  Quote: 	
		  On Mar 8, 2015, at 12:00 PM, kearney  wrote:HiI have been putting hours on my new engine and in the process have noticed something that may or may not be odd. While taxing I try to lean the engine to keep the plugs from fouling. I have noticed that the #1 cylinder goes hot far faster than the others.Fr example, when leaning on the ground yesterday cyls #2-6 were +/- 1050 F while number 1 spiked quickly to 1385F. I simply en-richened somewhat to bring it down.I am perplexed as to why CYL # 1 would react tgis way. In the air I don't see this type of behavior, only on the ground.Any wisdom from the intelligentsia? Do I even care about this?CheersLesRead this topic online here:http://forums.matronics.com/viewtopic.php?p=439153#439153 	
	
	
Read this topic online here:http://forums.matronics.com/viewtopic.php?p=439168#439168



	




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