Originally Posted by
CLBetten
As it is now I have a brand new .049 #4 cylinder and piston, screened venturi, fine needle and a Texaco head with one shim. I switched to a 5.7X3 prop. I haven't flown it yet. What do you think? Is it ready to fly?
The Texaco heads are lower on compression in order to work with very large props. I guess they will have about the same compression ratio as the regular Babe Bee heads. I think you would be much better of with the stock TD head and a few shims.
18000rpm on the 6x3 sounds about right though, and it should run better on the 5.7x3 prop.