Ya know, I don't really have a clue! I do know the new carb isn't anywhere near right, but that'll be corrected tonight hopefully. I did hear a tire rub going into turns 1 & 2. Coming out of three and four I looked into the mirror and saw all kinda of smoke. It looked real blue like tires. With as stiff as the car is, I'm kinda wondering if the posi unit is giving up and lifting the inside tire letting it spin. I'll be all under it tonight looking for shiny spots where the tires are (hopefully) rubbing.