6400rpm when I was at 515 stock heads hp 292 cams 6 rib 2.8" pulley around 12 psi..
6600rpm when I was 598-572 (depending on which of the 2 dynos I was on) patriot heads, stock intake, hp s292 cams, 18% over drive crank pulley, 3" SC pulley, S-trim
6800rpm but ran it to 7k when I was...