 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
BobbyPaulk(at)comcast.net
Guest
|
 Posted: Sat Jul 25, 2015 11:47 am Post subject: CHT |
 |
|
List,
My CHT for #4 is 301 degrees, #5 is 305 and #6 is 320 ~ 325.
Manifold pressure is 19" and 2400 rpm and 118 mph.
My question: Will 320 constantly at 19" shorten the life of my engine.
Or another way to put it is what is the highest CHT I can run without damage to the engine.
I know 356 degrees is max and cooler is better.
I have 240 hours on this engine and this is about the best I can get. Number one is running at 200 degrees and under.
Probes have been checked and are within 10 to 15 degrees.
Bobby ( age 77 )
Zodiac 601 XL "B"
Jabiru 3300 S/N 1141
Sensenich 64" x 51" Prop
Bing Carb 260 Main & 290 Needle Jet
Status - Flying 240 hrs.
[quote][b]
| | - The Matronics JabiruEngine-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?JabiruEngine-List |
|
|
|
| Back to top |
|
 |
BobbyPaulk(at)comcast.net
Guest
|
| Posted: Wed Jul 29, 2015 6:13 am Post subject: CHT |
|
|
Is anyone running CHT's at or near 320 ~325 at cruise.
I can not seem to get 5 & 6 below 320 deg.
Bobby ( age 77 )
Zodiac 601 XL "B"
Jabiru 3300 S/N 1141
Sensenich 64" x 51" Prop
Bing Carb 260 Main & 290 Needle Jet
Status - Flying 241 hrs.
[quote][b]
| | - The Matronics JabiruEngine-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?JabiruEngine-List |
|
|
|
| Back to top |
|
|
jetboy
Joined: 22 Jul 2006
Posts: 233
|
| Posted: Thu Aug 06, 2015 6:26 pm Post subject: Re: CHT |
|
|
You do seem to have tried everything obvious. a fellow over here is chasing high CHT across all cylinders and hasnt fixed it yet. Frustrating - which you already know. But he did tell me the correct main jet is now supposed to be #280
and needle jet #278 - #280
My engine is 2200 and i had highest CHT on #4 which was helped by adding some deflector strip around the rear corner of the duct there - to fill a leaking gap area around the back of the head
a visual check on overheating is for fins on the heads - they externally warp if overheated and can be seen looking along the bank - if they show all straight at 240 hrs is enough to say 320 CHT is working OK for you although we'd all be happier with 300 or less.
Ralph in NZ CH701 / 2200a
| | - The Matronics JabiruEngine-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?JabiruEngine-List |
|
_________________
Ralph - CH701 / 2200a |
|
| Back to top |
|
|
|
|
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
|
Powered by phpBB © 2001, 2005 phpBB Group
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
