 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
thornytoo1(at)hughes.net
Guest
|
 Posted: Sat Jun 22, 2013 10:28 am Post subject: What Temps should I see? |
 |
|
Gentlemen (and Ladies too)
I just had a newly overhauled O-360 installed on my tiger, along with a JPI EDM-900 analyzer. My issue is that I have no reference data to tell how hot my engine is running. I am aware that Tigers have a reputation for running hot, but my old panel only had an EGT gage. Specifically, what CHTs for cyls 3 & 4 should I expect to see on a newly overhauled ( and thus tight) engine during climb and also during cruise? Also, what temps should I expect to see on those same cylinders during climbs and during cruise after the engine is broken in and using detergent oil? I understand climb speeds and ambient temps affect the situation to some extent, but some ballpark figures would be nice for a reference.
Ken Kirkpatrick
N28546
[quote][b]
| | - The Matronics TeamGrumman-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?TeamGrumman-List |
|
|
|
| Back to top |
|
 |
md11strejo(at)yahoo.com
Guest
|
| Posted: Sat Jun 22, 2013 11:53 am Post subject: What Temps should I see? |
|
|
Ken, I have a 1977 AA5B with JPI CHT/EGT monitor. My engine has less then 300hrs TSOH and during the summer I see 425 in cruise and 440 during climb. I use a cruise climb at 110kts. CHT's have always been really hot. My baffling is really good also. I just installed a new Lopresti nose bowl but haven't flown it yet. I will post results soon.
Scott Trejo
N499GT
Sent from my iPhone
On Jun 22, 2013, at 1:27 PM, "Patricia Kirkpatrick" <thornytoo1(at)hughes.net (thornytoo1(at)hughes.net)> wrote:
[quote] <![endif]--> <![endif]-->
Gentlemen (and Ladies too)
I just had a newly overhauled O-360 installed on my tiger, along with a JPI EDM-900 analyzer. My issue is that I have no reference data to tell how hot my engine is running. I am aware that Tigers have a reputation for running hot, but my old panel only had an EGT gage. Specifically, what CHTs for cyls 3 & 4 should I expect to see on a newly overhauled ( and thus tight) engine during climb and also during cruise? Also, what temps should I expect to see on those same cylinders during climbs and during cruise after the engine is broken in and using detergent oil? I understand climb speeds and ambient temps affect the situation to some extent, but some ballpark figures would be nice for a reference.
Ken Kirkpatrick
N28546
| Quote: |
===================================
t">http://www.matronics.com/Navigator?TeamGrumman-List
===================================
cs.com
===================================
matronics.com/contribution
===================================
|
[b]
| | - The Matronics TeamGrumman-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?TeamGrumman-List |
|
|
|
| Back to top |
|
|
n2_narcosis(at)yahoo.com
Guest
|
| Posted: Sat Jun 22, 2013 9:54 pm Post subject: What Temps should I see? |
|
|
Ken,
My tiger has about 600 hours smoh and I have edm-830. I have worked really hard to get my baffling very consistent between cylinders. During fast cruise, WOT leaned to 2700rpm (luckily my engine runs about 75 degrees LOP very well) anywhere from 5500 to 8500ft 135-136kts TAS; I see anywhere from 390-410 on cyls 2,3, and 4 depending on OAT. They also have EGT spread less then 20. Number 1 is my oddball, CHT generally runs about 50 cooler than the others, and EGT is around 100 cooler. It is my first cylinder to start missing while leaning.
Brock
Sent from my iPad
On Jun 22, 2013, at 1:27 PM, "Patricia Kirkpatrick" <thornytoo1(at)hughes.net (thornytoo1(at)hughes.net)> wrote:
[quote] <![endif]--> <![endif]-->
Gentlemen (and Ladies too)
I just had a newly overhauled O-360 installed on my tiger, along with a JPI EDM-900 analyzer. My issue is that I have no reference data to tell how hot my engine is running. I am aware that Tigers have a reputation for running hot, but my old panel only had an EGT gage. Specifically, what CHTs for cyls 3 & 4 should I expect to see on a newly overhauled ( and thus tight) engine during climb and also during cruise? Also, what temps should I expect to see on those same cylinders during climbs and during cruise after the engine is broken in and using detergent oil? I understand climb speeds and ambient temps affect the situation to some extent, but some ballpark figures would be nice for a reference.
Ken Kirkpatrick
N28546
| Quote: |
===================================
t">http://www.matronics.com/Navigator?TeamGrumman-List
===================================
cs.com
===================================
matronics.com/contribution
===================================
|
[b]
| | - The Matronics TeamGrumman-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?TeamGrumman-List |
|
|
|
| Back to top |
|
|
teamgrumman(at)yahoo.com
Guest
|
| Posted: Sun Jun 23, 2013 12:18 am Post subject: What Temps should I see? |
|
|
Ken,
I'm not all that convinced Tigers run any hotter than any other air cooled airplane.
In 2004, I installed a JPI analyzer in a 260 Comanche with a 300 hr engine in place of an EI analyzer. The engine had been built by Lycon. I also cleaned up the baffles and seals.
On the first flight, the owner brought it back shortly after take-off saying there was something terribly wrong with the engine cooling; his CHTs were over 450 on climbout. I had suspected JPIs indicated higher (more accurate?) for several years. Both the owner and I went over the entire baffle installation and verified everything was tighter than before.
In 2007, I upgraded a Tiger to a JPI 700 from an older digital EI analyzer.
I installed the EI in my panel next to my JPI. The EI was installed on #3 and the JPI watched the rest. I used a separate circuit breaker for each unit and used the same engine ground for each. I wrote about it in the AYA Star. Prior to startup, both analyzers read the same. By the time I got to the runup, the JPI was as much as 100 degrees higher. In climbout, the JPI was as much as 80 degrees higher. Straight and level in cruise, the JPI was 40 to 80 degrees higher. I flew both units for over a year.
I wrote to Aviation Consumer to see if they would do some research. They refused.
Ken Tunnell at LyCon has had customers complain of CHTs being too high and later discover it was a JPI analyzer.
In general, keep it under 470 on climbout and expect 410 to 440 in full power cruise. If at all possible, run the engine as lean as possible, even expecting some slight roughness. If you can get it super lean, the CHTs will come down. Don't expect a big drop, just 10 degrees or so.
Gary
Sent from my iPad
On Jun 22, 2013, at 11:27 AM, "Patricia Kirkpatrick" <thornytoo1(at)hughes.net (thornytoo1(at)hughes.net)> wrote:
[quote] <![endif]--> <![endif]-->
Gentlemen (and Ladies too)
I just had a newly overhauled O-360 installed on my tiger, along with a JPI EDM-900 analyzer. My issue is that I have no reference data to tell how hot my engine is running. I am aware that Tigers have a reputation for running hot, but my old panel only had an EGT gage. Specifically, what CHTs for cyls 3 & 4 should I expect to see on a newly overhauled ( and thus tight) engine during climb and also during cruise? Also, what temps should I expect to see on those same cylinders during climbs and during cruise after the engine is broken in and using detergent oil? I understand climb speeds and ambient temps affect the situation to some extent, but some ballpark figures would be nice for a reference.
Ken Kirkpatrick
N28546
| Quote: |
===================================
t">http://www.matronics.com/Navigator?TeamGrumman-List
===================================
cs.com
===================================
matronics.com/contribution
===================================
|
[b]
| | - The Matronics TeamGrumman-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?TeamGrumman-List |
|
|
|
| Back to top |
|
|
md11strejo(at)yahoo.com
Guest
|
| Posted: Sun Jun 23, 2013 10:44 am Post subject: What Temps should I see? |
|
|
Ken, a good design should yield 385/390 across all cylinders.
Sent from my iPhone
On Jun 23, 2013, at 3:17 AM, Gary L Vogt <teamgrumman(at)yahoo.com (teamgrumman(at)yahoo.com)> wrote:
[quote]Ken,
I'm not all that convinced Tigers run any hotter than any other air cooled airplane.
In 2004, I installed a JPI analyzer in a 260 Comanche with a 300 hr engine in place of an EI analyzer. The engine had been built by Lycon. I also cleaned up the baffles and seals.
On the first flight, the owner brought it back shortly after take-off saying there was something terribly wrong with the engine cooling; his CHTs were over 450 on climbout. I had suspected JPIs indicated higher (more accurate?) for several years. Both the owner and I went over the entire baffle installation and verified everything was tighter than before.
In 2007, I upgraded a Tiger to a JPI 700 from an older digital EI analyzer.
I installed the EI in my panel next to my JPI. The EI was installed on #3 and the JPI watched the rest. I used a separate circuit breaker for each unit and used the same engine ground for each. I wrote about it in the AYA Star. Prior to startup, both analyzers read the same. By the time I got to the runup, the JPI was as much as 100 degrees higher. In climbout, the JPI was as much as 80 degrees higher. Straight and level in cruise, the JPI was 40 to 80 degrees higher. I flew both units for over a year.
I wrote to Aviation Consumer to see if they would do some research. They refused.
Ken Tunnell at LyCon has had customers complain of CHTs being too high and later discover it was a JPI analyzer.
In general, keep it under 470 on climbout and expect 410 to 440 in full power cruise. If at all possible, run the engine as lean as possible, even expecting some slight roughness. If you can get it super lean, the CHTs will come down. Don't expect a big drop, just 10 degrees or so.
Gary
Sent from my iPad
On Jun 22, 2013, at 11:27 AM, "Patricia Kirkpatrick" <thornytoo1(at)hughes.net (thornytoo1(at)hughes.net)> wrote:
| Quote: | <![endif]--> <![endif]-->
Gentlemen (and Ladies too)
I just had a newly overhauled O-360 installed on my tiger, along with a JPI EDM-900 analyzer. My issue is that I have no reference data to tell how hot my engine is running. I am aware that Tigers have a reputation for running hot, but my old panel only had an EGT gage. Specifically, what CHTs for cyls 3 & 4 should I expect to see on a newly overhauled ( and thus tight) engine during climb and also during cruise? Also, what temps should I expect to see on those same cylinders during climbs and during cruise after the engine is broken in and using detergent oil? I understand climb speeds and ambient temps affect the situation to some extent, but some ballpark figures would be nice for a reference.
Ken Kirkpatrick
N28546
===================================
t">http://www.matronics.com/Navigator?TeamGrumman-List
===================================
cs.com
===================================
matronics.com/contribution
===================================
|
[b]
| | - The Matronics TeamGrumman-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?TeamGrumman-List |
|
|
|
| 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
