The International Cessna 170 Association

What is the #3 cylinder mod? DaveF, do you have a fuel flow meter? I know I'm running plenty of fuel through the carb. 10.5 an hour and still seeing these temps.

I have a '53 170B with the O-360A1A. Trying to lower CHT temps. #3 at 400 degrees and #4 380 and thats running 175 degrees ROP. Baffling is good and sealed up every little hole I could find. Does anyone sell the longer seaplane lip or does it have to be made? Thank You.