I'm using an Autometer Phantom WB hooked up through the AC voltage. You can see where I've overlaid the AC voltage with the my AFR (afr JCP). What I think I'm seeing is the "puffs" between the exhaust gases but I'm not sure. My cam is the LS3 ASA cam (.525/.525 @ .224/[email protected]). The car has the GM crate engine LS3/525hp, Texas Speed 1-7/8th's long tubes with true duals. The WB is on the driver's side in the header's screw in bung. It's supposed to read 1-4v but it gets above that sometimes.
I've tried messing with airflow, injector timing, EOIT settings, etc. Is it just an affect of cam overlap? Maybe a bad O2 sensor?