Matronics Email Lists :: View topic

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

582 EGTs

Matronics Email Lists Forum Index -> Kitfox-List

View previous topic :: View next topic

Author Message

CrownLJ(at)verizon.net
Guest

Posted: Sat May 20, 2006 6:38 am Post subject: 582 EGTs

Is it normal for the rear cylinder to run hotter than the front?  By how 

much?  My slides are as level as possible at various throttle positions, 

yet the rear egt is about 10F-60F warmer, depending on the rpm and if I 

blink.(so it seems)  This is measured with a digital gauge.  At one 

moment it will be with 5F, then with now reason for change it separates 

to about 50F.  Each flight is different.  Am I chasseing my tail, or is 

it an early symptom of a problem?  582 with 130hrs/4yrs - but many short 

frequent flights.



Thanks guys,

Larry

- The Matronics Kitfox-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Kitfox-List

msm_9949(at)yahoo.com
Guest

Posted: Sat May 20, 2006 8:56 pm Post subject: 582 EGTs

I don't know if it's normal or not Larry but I've experienced the same thing with my 582 gray head. It has 33.2 hrs now and aft cylinder has always run a bit hotter than fwd.



Larry Martin <CrownLJ(at)verizon.net> wrote:  



Is it normal for the rear cylinder to run hotter than the front? By how 

much? My slides are as level as possible at various throttle positions, 

yet the rear egt is about 10F-60F warmer, depending on the rpm and if I 

blink.(so it seems) This is measured with a digital gauge. At one 

moment it will be with 5F, then with now reason for change it separates 

to about 50F. Each flight is different. Am I chasseing my tail, or is 

it an early symptom of a problem? 582 with 130hrs/4yrs - but many short 

frequent flights.



Thanks guys,

Larry



Marco Menezes

Model 2 582 N99KX

		

---------------------------------

- The Matronics Kitfox-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Kitfox-List

bmwebb(at)cox.net
Guest

Posted: Sun May 21, 2006 3:56 am Post subject: 582 EGTs

Is it possible that your probes are doing it? I have no idea how to check

them, but it sounds as if they're maybe bad or shorted.



Maybe if you reverse the probes in the exhaust manifold, and see if the same

cylinder gives the same indication. If not, it's the probes (or the

instrument). If so, the motor is doing it. I'm not convinced the Bing carbs

are very accurate metering devices, especially with age.



My grey head was odd, as well. Not like yours, but at low throttle, it was

close, at WOT, it was mostly within 5-10 of each other (sometimes dead-nuts

on), but part throttle was anybody's guess. At least it was consistently

odd. 



Mine did not jump around like you describe, but they would separate,

sometimes beyond Rotax limits (at part throttle settings). 



Bradley



--

- The Matronics Kitfox-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Kitfox-List

CrownLJ(at)verizon.net
Guest

Posted: Sun May 21, 2006 5:06 am Post subject: 582 EGTs

Thanks Bradley,

  I did switch the probs and the temps followed to that cylinder.  

Actually, I have one cylinder at ideal temps, and the other is cooler. 

I'm going to swap carb positions and see if that changes.  As I get 

thinking about it, one carb is older than the other, assuming the jets 

it larger with age, it may explain the difference in temps, even though 

the slides are sync'd.

  Does anyone replace the jets at 150 hrs, as per Rotax mm?



Larry





Is it possible that your probes are doing it? I have no idea how to 

check

them, but it sounds as if they're maybe bad or shorted.



Maybe if you reverse the probes in the exhaust manifold, and see if the 

same

cylinder gives the same indication. If not, it's the probes (or the

instrument). If so, the motor is doing it. I'm not convinced the Bing 

carbs

are very accurate metering devices, especially with age.



My grey head was odd, as well. Not like yours, but at low throttle, it 

was

close, at WOT, it was mostly within 5-10 of each other (sometimes 

dead-nuts

on), but part throttle was anybody's guess. At least it was consistently

odd. 



Mine did not jump around like you describe, but they would separate,

sometimes beyond Rotax limits (at part throttle settings). 



Bradley

- The Matronics Kitfox-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Kitfox-List

wliles(at)bayou.com
Guest

Posted: Sun May 21, 2006 2:01 pm Post subject: 582 EGTs

No set of carbs will be absolutely identical.  Little things like very 

slightly worn tooling when making the carb, position of the carb on the 

engine or in the fuselage, slight differences in each side of the engine 

(a 582 is built sort of like two single piston engines on a single 

crank),  slightly different float heights, etc.  Rotax allows for a 

difference of several degrees between cylinders (it's in the manual 

somewhere).  The differences were so large on the 618 that different 

jetting was required front to rear.  The best way to handle this that I 

have found is the Arctic Sparrow kit that allows adjustment of the 

needle height from the cockpit.  You can tune your carbs for the heat 

range you need and balance them in flight.  You will not have to 

compromise on the needle setting.  There are kits now on the market that 

apparently will allow even more control.  Maybe that's what you need.



Jerry Liles

Larry Martin wrote:



 	  Quote: 	
		  



Thanks Bradley,

  I did switch the probs and the temps followed to that cylinder.  

Actually, I have one cylinder at ideal temps, and the other is cooler. 

I'm going to swap carb positions and see if that changes.  As I get 

thinking about it, one carb is older than the other, assuming the jets 

it larger with age, it may explain the difference in temps, even though 

the slides are sync'd.

  Does anyone replace the jets at 150 hrs, as per Rotax mm?



Larry





Is it possible that your probes are doing it? I have no idea how to 

check

them, but it sounds as if they're maybe bad or shorted.



Maybe if you reverse the probes in the exhaust manifold, and see if the 

same

cylinder gives the same indication. If not, it's the probes (or the

instrument). If so, the motor is doing it. I'm not convinced the Bing 

carbs

are very accurate metering devices, especially with age.



My grey head was odd, as well. Not like yours, but at low throttle, it 

was

close, at WOT, it was mostly within 5-10 of each other (sometimes 

dead-nuts

on), but part throttle was anybody's guess. At least it was consistently

odd. 



Mine did not jump around like you describe, but they would separate,

sometimes beyond Rotax limits (at part throttle settings). 



Bradley

- The Matronics Kitfox-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Kitfox-List

Display posts from previous:

	Matronics Email Lists Forum Index -> Kitfox-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum