Posted for "George Braly" <gwbraly@gami.com>:

 Andre,
 
 What MP x RPM x FF X TIT and KIAS are you using in the climb?
 
 My preference for TSIO-550 engines in the IV-P's is  to climb at WOT x 2600
or 2700 RPM,  with sufficient fuel flow to keep the TITs down to no more than
1350F, or less.
 
 With the baffling properly re-designed,  that will keep the hottest CHT down
to under 380F in the climb at 145 KIAS in the climb.
 
 Operating it that way, the  ROC is rather spectacular.   S.L. to 20,000 in 10
minutes or so.
 
 Regards,  George
 

"  coming close to 220 hrs in my IV-P with routine LOP as
 per the GAMI people but without gamijectors since the
 engine is quite efficient with a reasonable spread
 between CHT the hottest cylinder being #2. Usually
 cruise at 21K to 24K going east and 18K going west, I
 climb full rich and 2500 rpm the limiting factor being
 400 degrees CHT which I try not to exceed by
"