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Was it the same track? Some tracks are faster than others(up/down hill, clocks)

Was the air really better or was it just a little cooler? Barometric pres., humidity make a big difference

Congrats on the new best

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I've seen this happen to freinds in the past, they made changes to the car and motor and didn't pick up the 1/4 ET and MPH, ended up they where running out of fuel in the last two to three hunded feet. No missing or any other indication that it was running out of fuel other than not pulling hard the last part of the track It has happen to me in so many ways(pump size, fuel line size, needle and seat size. fuel element to fine and the list goes on ) it makes me want Try jetting the carb. up 2 or 3 jet sizes and see if that helps or hurts the ET and MPH, if it doesn't change either the ET or MPH fix the fuel delivery problem, or problems Let us know what you find out