Raising needles vs. fuel economy

[mile9c1]

Any idea how much raising the Viper needles to 3.25 affects fuel economy?

 

[super1c]

None as far as i can tell. I dont get exact numbers but my MPG is right in line with other vipers without the needles moved in our group.

 

[viperSbob]

I did raise my needles. I think it is a little bit thirstier on cold days, not enough to be a concern, but on warm days, I notice it doesn't want to come out of the corners as nice.Its too bad there are not optional needles that would allow you to use the middle settings on the needle and to be richer down low on the rpms.