What is the power difference, more, less, or the same, on a pipe or a header muffler on a 40 PA Merlin Light? The reason I'm asking this question is that I need a touch more power because my lap times are a little slow where the engine is happy. The lap times are 5.4 to 5.4+ where it's happiest on 61 foot lines. Engine runs great, 2-4 run. The engine prop is a APC 11-5.
Fuel is Sig 10-10-10 plus 1 oz. of Aero 1 and 1.3 oz of castor added.
RPM is 88-87 where engine is happy and runs super good.
Our altitude is 5,300 feet.
I'm going to try Sig 15-10-10 plus the above additions tomorrow. So, what do I need to get a little more power or do I need a PA 51? (By the way, I'd love to have one! Does it look like you'll have them back any time soon? I have two 40s I bought from you.)
Thank you ahead of time for the information-
Jimmy Jacobs