Since my WB is in the downpipe probably 24 - 30 inches from the engine's exhaust port it is late recording what is actually happening in the combustion chamber. The A/F it reports is actually for a combustion event several revolutions earlier. Have any of you come up with an algorithm you like to shift them back to make a better match? Right now I'm using an algorithm that is literally one dimensional based on piston speed. My idea was that a faster piston speed would eject the exhaust slug at higher speed down the exhaust port. But another idea would be more three dimensional and based on volume looking at the MAF to decide how air was entering the engine with more air in equal more air out equal to less time between combustion and WB.

FWIW on my GT500 at WOT I can see about two revolutions between combustion events and the WB measuring the change. By time shifting the WB entries to earlier combustion events I'm getting better data to tune with.