Originally Posted by barnett468
why did my 6 rib novi not slip at 12 lbs boost at 6800 rpm?
With only making 12 lb at 6800 you must of had a fairly large blower pulley or, a larger crank puley--guessing a 3.10 or even a 3.33 (blower). With either one of those you had a lot of belt "wrappage" on that pulley--hence very little, if any slippage. Generally, the smaller pulley you go to, the more slip you get. You can go to 8 and 10 ribs to help it as you go to the smaller pulley but eventually all of us go to a cog--if class rules allow.