Actually when i first put in the SP, I was at about 6.3 which was way too slow. Going up made it quicker. Though the 6.3 fdr with my Novak XBR 10.5 was perfect. I'm at 8.2 now and it's almost as fast. I got a 81t 48p spur and gonna drop in a 23t pinion tonight to move me up to about 8.6. Hopefully that will solve it.