I have noticed that alot of people with the same or fewer mods than I have always trap higher than me. I know for sure I have remembered glancing at my tach when I shift 4th and see 6500, I think this is hurting my mph . Some of the faster cars say they hold first out and shift it high say 6300-6500 but on the 2-3 is 6200 and the 3-4 is 6. I may try this and see if my mph comes up. I have a race tune and every mod in the book and have broke 118 once all the other runs were in the 117's and some of these were in descent weather. My car dynoed @ 456 and 478 T/Q so its making descent power. Any thoughts on shifting and rpms????