Some ideas to consider:

1. make sure your baffling is not leaking anywhere. On my legacy, there were problems near the front pilot's side. After some engine work, someone forgot to seal around a tube punching through the baffling which caused a 20 degree increase for me. It's likely you'll see some CHTs that are a little high near any leaks (I was seeing higher temps on 2 and 6).
2. If you want to get serious, Performance Engines sells a remote oil cooler kit that uses a high efficiency oil cooler. It replaces the stock 550N cooler. I don't know if it will fit in an ES or not though. It's supposed to bring the temps down a lot and keep them there. I don't think they have it on their website though.

-Tom

P.S. Responding to a different thread, I've bought some stuff from Performance Engines (although not a complete engine), and I have nothing bad to say about them. They seem like good guys and straight shooters.


Chatfield S. Daniel wrote:

I apologize for asking a question that has been covered before, but I am having a problem with the archives.  I fly a Super ES with firewall forward done by Lancair with a new IO 550N.  I have about 140 hours on the plane and have had high oil temps from the beginning.  Yesterday with high ambient temps (95) I reached 220 degrees in my initial climb by the time I got to 3500 ft.  I am now ready to try to fix the problem and would like some advice.

 

Thanks for your help.

 

Chat Daniel