rbboy

hey all! i was wondering how to determine the right gearing difference between 7x1, 8x1 & 9x1 for my local track. At our new current, I gear my 8x1 DC Checkpoint at 8.52 which is just right. But, if i were to use both 7x1 & 9x1, both DC Checkpoint what Final Drive Ratio should i start with? Hope you guys can help me out