I have a 418 in my Challenger that weighs 3720 race weight. Previously it has been as quick as 6.92 and 10.98 @ 120.5, but about 2 weeks ago I ran 6.89 on the brakes. It would have been 6.88 @ around 98.5 mph. It has ported Edelbrocks, Victor intake, 950HP carb, cam is 262in 268ex 110 centerline with 11.55 compression and all I have ever run is pump 93 octane.