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O-320 Cylinder Heads Different Temperatures

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genie(at)swissmail.org
Guest

Posted: Fri May 10, 2013 10:39 pm Post subject: O-320 Cylinder Heads Different Temperatures

According to the Vision Microsystems VMS 1000C display in my aircraft 

the temperatures of the cylinder heads differ when in flight. Could that 

cause problems? If so, what, and how can I remedy this?



Thanks.



George Nielsen

RV-6 PH-XGN

The Hague, the Netherlands

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n223rv(at)wolflakeairport
Guest

Posted: Sat May 11, 2013 3:38 am Post subject: O-320 Cylinder Heads Different Temperatures

Can you better explain the temperatures and temperature differentials by cylinder?  



-Mike Kraus

RV-4 sold 

RV-10 flying 

KitFox SS7 Radial building 



On May 11, 2013, at 2:37 AM, George Nielsen <genie(at)swissmail.org> wrote:



 	  Quote: 	
		   

 

 According to the Vision Microsystems VMS 1000C display in my aircraft the temperatures of the cylinder heads differ when in flight. Could that cause problems? If so, what, and how can I remedy this?

 

 Thanks.

 

 George Nielsen

 RV-6 PH-XGN

 The Hague, the Netherlands

- The Matronics LycomingEngines-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:

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BARRY CHECK 6

Joined: 15 Mar 2011
Posts: 738

Posted: Sat May 11, 2013 4:48 am Post subject: O-320 Cylinder Heads Different Temperatures

George:



A temperature differential (delta) between both CHT & EGT that is poorly considered acceptable at 50 Deg F between cylinders.

I think that is VERY POOR.  I am seeing ONLY 15 Deg F delta on CHT.  And in real cold days (32 F/0C) the delta drops down to about 5 Deg F on CHT's.  I am not concerned with the delta on EGT's but I am on CHT's.  I monitor CHT's during flight.  As far as EGT's go...  I can lean just as well with the EAR as with the EGT.

 



So, how do you control the delta?  A REAL tight fitting baffling system or plenum.  I am luck as I have baffles.  By controlling the fit around the starter ring gear,  size of cowl exhaust ramps/flaps, fit of top to bottom of cowl, oil cooler location, and those highly forgotten little pieces of aluminum in front of cylinders 1 & 2.  You can get the temps down.  AND don't forget to install those fiberglass blisters INSIDE the cowl...  You know, the two just after the intake ports - Mounted on the top of the cowl.  DON'T ASK!

 I have also found the two louver vents on the bottom of the cowl work GREAT!  

Cooler engine and NO CO issues.

Barry

 On Sat, May 11, 2013 at 2:37 AM, George Nielsen <genie(at)swissmail.org (genie(at)swissmail.org)> wrote:

[quote] --> LycomingEngines-List message posted by: George Nielsen <genie(at)swissmail.org (genie(at)swissmail.org)>

 

 According to the Vision Microsystems VMS 1000C display in my aircraft the temperatures of the cylinder heads differ when in flight. Could that cause problems? If so, what, and how can I remedy this?

 

 Thanks.

 

 George Nielsen

 RV-6 PH-XGN

 The Hague, the Netherlands[b]

- The Matronics LycomingEngines-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?LycomingEngines-List

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