Stan Galat posted:Mike-
With a power pulley and welded/balanced fan, you're good past 7000 RPM (at least that's what I tell myself).
Rods and valvetrain? You're on your own, man.
Stan, Inside I've already got a balanced set of SCAT rods, balanced pistons, counter weighted 69mm crank. I looked into ordering HD valve springs and the tool to install and decided I was putting lipstick on an 043 pig. Instead I went ahead and ordered a set of Panchitto 044 double valve spring heads. I'll still plan to stay under 6000, but won't worry as much about hearing additional bangs.
Mike