I copied a tune from HPT repository of a Z06 car with almost identical mods but results were the same. I've been logging STFTs and copying them over to the VE tables and smoothing with some slight improvement. Do I need to look at spark also and how would I tell how much to add. Not making much progress. Tune and log is attached if anyone has time to look over.
806 heads were ported locally by a guy that is supposed to really good. Other mods include Z06 cam, LTs, no cats, rear O2 delete, LS6 intake. and rebored block.