Not sure what A/F monitor you Are using, a fair number of them out there are either slow response or have a fairly 'generous' +/- % range of accuracy....steady state they're 'fine', but many of them (not allthough) out there can't be trusted to read real time on a 1/4 mile pass.


WIZE

World's Quickest Diahatsu Rocky (??) 414" Stroker Small block Mopar Powered. 10.84 @ 123...and gettin' quicker!

https://www.youtube.com/watch?v=-mWzLma3YGI

In Car:

https://www.youtube.com/watch?v=PjXcf95e6v0