To me it seems like you are running a little rich.  I have the same engine and prop and if I run 50 degrees cool of peak (TIT) I have the following:

 

RPM 2400

MP 30”

EGT 1550

TIT 1625

Fuel Flow 17.0

Press. Alt 15,000

CHT (Hottest) 375

 

Bryan Burr

N132BB

LNCE

 

 

-----Original Message-----
From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of phil s
Sent: Tuesday, September 12, 2006 4:56 PM
To: Lancair Mailing List
Subject: [LML] Backfires LOP

 

 

Anyone had experience with this?
Pilot flying our IVP (TSIO550E3B with 4 blade MT) and reports:
"Had backfires(?) couple of nights back. Was running lean of peak with  
temps 1590 at FL150, around -15C, light rain,  29Hg 2500rpm .
Happened twice so went rich of peak for remainder of flight with no  
problems. Any reason come to mind?"
Be grateful for any thoughts

Phil Sexton
Melbourne