I've looked over earlier threads on this topic and got some good info. Still my situation has some unique elements so I thought I'd throw it out here.
My RV-6 has an O360-A1A, normally aspirated, with one mag (L) and one Pmag (R). I typically got EGTs in the 1200-1350 range as measured by my EI UGB-16, only occasionally pushing 1400 on climbout.
At 1000 hours I replaced most of the insturments including the UGB16 with an AFS5600 EFIS+Engine monitor, which also involved swapping out the probes to a different type. The specs on these probes say to locate them 2" from the exhaust flanges instead of the 1 1/4" that the previous ones were, so I welded up the old holes and drilled new ones per spec.
Conicedentally my PMag (right side) crapped out so I had it repaired.
Now I get higher than before EGTs, frequently on climbout getting into 1500 and even pushing 1550. They settle out at cruise, but still higher than they used to be (close to 1400 for 1 and 2).
I see that the intake hoses are getting pretty frayed-looking so maybe I have an intake leak that came along just now, will be checking that. But I'm also wondering, if the old probe holes weren't welded up just right could that cause this? I don't suppose exhaust blowing out the holes would cause the EGTs to rise, would it? Or might they be sucking in air? But it seems that would cool them down.
I tested the probes and they test out fine. Rob @ Advanced tells me EGTs this high is not typical when probes are located like mine. Brad @ Pmag says anything like this associated with the Pmag would also involve rough running but it's very smooth on the Pmag and mag drops are normal. Fuel flow seems normal too.
There apparently is no max for EGTs spec'd by Lycoming but it is a significant change from before and any time things are out of the "norm" is cause for concern.
Any thoughts appreciated.
My RV-6 has an O360-A1A, normally aspirated, with one mag (L) and one Pmag (R). I typically got EGTs in the 1200-1350 range as measured by my EI UGB-16, only occasionally pushing 1400 on climbout.
At 1000 hours I replaced most of the insturments including the UGB16 with an AFS5600 EFIS+Engine monitor, which also involved swapping out the probes to a different type. The specs on these probes say to locate them 2" from the exhaust flanges instead of the 1 1/4" that the previous ones were, so I welded up the old holes and drilled new ones per spec.
Conicedentally my PMag (right side) crapped out so I had it repaired.
Now I get higher than before EGTs, frequently on climbout getting into 1500 and even pushing 1550. They settle out at cruise, but still higher than they used to be (close to 1400 for 1 and 2).
I see that the intake hoses are getting pretty frayed-looking so maybe I have an intake leak that came along just now, will be checking that. But I'm also wondering, if the old probe holes weren't welded up just right could that cause this? I don't suppose exhaust blowing out the holes would cause the EGTs to rise, would it? Or might they be sucking in air? But it seems that would cool them down.
I tested the probes and they test out fine. Rob @ Advanced tells me EGTs this high is not typical when probes are located like mine. Brad @ Pmag says anything like this associated with the Pmag would also involve rough running but it's very smooth on the Pmag and mag drops are normal. Fuel flow seems normal too.
There apparently is no max for EGTs spec'd by Lycoming but it is a significant change from before and any time things are out of the "norm" is cause for concern.
Any thoughts appreciated.