bptjr
Active member
I wish my 2009 9.9 WAS based on a 15 , but like you said it is sister to the 8. Now i am trying to fab a shorter velocity stack with larger bell. Still experimenting with length & diameter. I also now am studying effects of air&water temp. And humidity& dewpoint. Its amazing how much weather efects rpm. Also thinking about Wetlander coating on the bottom. Anyone tried this? I hear it is really slick.
