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CHT
Thanks
Mark
Mark Anderson- ICS member
- Posts: 196
- Joined: Sat Aug 29, 2009 12:24 am
- Location: Huntsville , AL
Re: CHT
- David Lawrence - N8378P
- ICS member
- Posts: 60
- Joined: Mon May 12, 2003 8:35 pm
Re: CHT
Thanks
Mark
Mark Anderson- ICS member
- Posts: 196
- Joined: Sat Aug 29, 2009 12:24 am
- Location: Huntsville , AL
Re: CHT
P.S. David is modest - he won't tell you his gorgeous Comanche won the Flagship a few years back and he has every piece of paper ever written about that plane in perfectly organized matching binders .... I'm envious.
Patricia Jayne (Pat) Keefer ICS 08899
PA-39 #10 Texas
N3322G- ICS member
- Posts: 1911
- Joined: Thu May 08, 2008 1:58 pm
- Location: Fort Worth, Texas area
Re: CHT
One thing you did not mention is whether you have checked the seal that is between cowl and the front of the engine. This seal is virtually invisible with the cowl installed. We bought our Comanche with a new engine, and new baffling on the top of the engine, but the shop doing the install failed to replace that seal which had rotted away. We also had to restrict our rate of climb to keep #5 below 400. Mentioned this to my mechanic, he replaced the missing seal, and since then I have not seen an cht reading above 360,in climb, no matter the temp.
Good luck, Don
- 9089P
- ICS member
- Posts: 426
- Joined: Wed Jan 07, 2004 7:01 am
Re: CHT
Thanks
Mark
Mark Anderson- ICS member
- Posts: 196
- Joined: Sat Aug 29, 2009 12:24 am
- Location: Huntsville , AL
Re: CHT
Don
- 9089P
- ICS member
- Posts: 426
- Joined: Wed Jan 07, 2004 7:01 am
Re: CHT
Thanks. I bought some new baffles a couple of months ago because mine were cracking. At the time my shop just repaired them because I had to wait for the new ones to be made. I will go ahead and install them. I ordered some new chafing strips also. I will see if it makes a difference and report back!
Thanks
Mark
Mark Anderson- ICS member
- Posts: 196
- Joined: Sat Aug 29, 2009 12:24 am
- Location: Huntsville , AL
Re: CHT
Curious to know if you are running a JPI Engine monitor to measure the CHT, the reason I ask is I just installed a JPI EDM 700 in my 66 260B and the probe for number 5 CHT had to installed on the top spark plug as per the install instructions as the factory CHT is taken from the normal probe port on the bottom of number 5 cylinder. The JPI manual did mention that there is a risk that the the CHT may indicate 20 to 50 degrees differential from the other cylinders as we installed the probes in the normal probe ports on the bottom of the other cylinders. I find in cruise running 20 degrees rich of peak on the EGT the cylinder runs a linear track on the JPI approximately 40 degress hotter than the other cylinders. (345 versus 385)
Regards
- Robert Miller
- Posts: 21
- Joined: Thu Sep 01, 2011 4:24 am
- Location: Alberta
Re: CHT
Thanks
Mark
Mark Anderson- ICS member
- Posts: 196
- Joined: Sat Aug 29, 2009 12:24 am
- Location: Huntsville , AL