Major4567 wrote:My LCH have been on for about 30 hours now. Head temps stay between 190-200 F.
Where are you getting your CHT readings from? Perhaps I should put this into another thread but my question has to do with CHTs that might be too cool. My Sonex is Corvair powered and my CHTs are extremely cool ... especially like last Friday with the OAT in the mid 40's my CHTs were difficult to get near 220ºF once I got up into cruise. I could barely get them near 180ºF before take-off. I'm reading under the rear spark plugs.
Oil temps were a bit better at 178ºF but my OT in the warm summer is usually between 200-220ºF depending on how hot the OAT is. I've read that some engine builders give 150ºF for a minimum CHT temperature. I've had a couple of very knowledgeable engine gurus ask me what problem I'm trying to solve.
With your temps that low do you have any issues with 100LL? Are you using Mogas or Decalin to help with lead build up or has that been a concern at all? Don't misunderstand ... I'm pleased that mine runs cool as I can get my summertime CHTs up to about 270ºF on a hot day if I lean it out to 1250ºF or a bit higher on EGT.
Would just appreciate some input as to how your engine performs with the much lower, and what I believe, to be a more ideal CHT temps for aluminum cylinder heads.
N319WF @ 6J2
Myunn - "daughter of Cleanex"
120 HP - 3.0 Corvair
Tail Wheel - Center Stick
Signature Series 2200 Paint Job
78.4 hours / Status - Flying