So I was running 127 Main jets. Then learned some of the guys I race with are running 117/120's so I went down to a 125 for a couple of races and everything Was good, then decided to try a 122.5, 15 laps into the 40 lap main engine started lay down, coming off the corners half way down the front and back stretch felt like I had 65% power and then would pick back up. After race talked to some of the guys, they said sounds like it's to rich. It was a humid cool night 62 degrees. When I got home I pulled the plugs and they looked pretty white, like it was running hot. So for last nights race I went back to a 125 main. Car was good all day and most of the. Main. 10 laps to go after a coup,e of cation laps engine did the same thing. Plugs look hot again. So now I'm confused 125 main 160 air and air/fuel 4 1/2 turns out. What. Am I missing I want to run 120's or 122.5's any help would be greatly appreciated. -Brian