Originally Posted by
dfe1
I haven't done any cammed engines yet, but with a stock Trailblazer SS and C6 with headers, I haven't noticed any unusual sensitivity to tune changes, using the same approach as with LS1. I still can't figure out what kind of non-prescription pharmaceuticals the GM calibration engineeers take before developing the original calibrations. A lot of the 3-D graphs look like a topographical map of a mountain range-- not a sensible calibration for an internal combustion engine.