I went from a old 950 untuned Holley to a ProSystems 1050 Dominator. Last month I ran a new best 6.21 @ 110.59 with a 1.39 60 ft. I picked up a tenth and 2 mph with the new carb. but my 60 ft. times are a lot slower ,with the old 950 they were 1.33-1.34 almost every pass. Did I slow down on my 60ft. because I went to the bigger carb. Also with the 950 my ET did not change much with the weather, Now it slows down a lot when the temperature goes up. I best at T&T the other night was only a 6.37 @ 108 with a 1.41 60ft.