I wonder if the race gas was affecting the AFR readings due to mixing with the pump gas better from being sloshed around from the runs, hence the time slips difference in MPH work
Where you monitoring the density altitude?
With no jetting changes the AFR should have remain the same twocents shruggy
All Information is good up

Last edited by Cab_Burge; 09/01/19 01:38 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)