Originally Posted by
Recycled Flyer
Unless I am missing something those instructions say for a .15 (2.5cc) to break in on a 9x4 then use anything between a 7x4 and 9x6.
As I stated before I do not race so I feel no need to get up on the peak of the power curve. I have no experience in the 22K range. I will bow to you and your friend's experience and expertise.
George