Well I drove to good air in Texas this weekend. I was in Witchataw Fall. The best time it ran up there before the , Cam and converter was 9.70 @ 71 mph. ( Its an 1/8 mile track.) Now it is running a 8.92 @ 78 m.p.h. !! Thats high 13s in the 1/4. That LS1 "HOT" cam pulls way hard up top. I Have a Yank 3000 stall and it stalls to 2800 on the foot brake. I was doing 2.00 to 2.15 60 foots. It is an awsome cam for the money. You just need at least a 3000 stall and a Nelson tune to get it to work.