Actually, I swapped out the Granatelli a week or so ago (with the stock "screened" MAF)....and the pinging was a bit lighter immediately. I suspect that it was part of the problem...I sold it a few days ago to someone with an NA Chevy. I didn't have a wideband when I swapped MAF...but it just felt better with stock MAF..even idled smoother..

 

My 03 tahoe with whipple pings like crazy when I lightly throttle up in overdrive about 1800 rpms. I've reduced timing and messed with a few other options, but that doesn't help much. I think the added heat the blower is adding to the air temps are really hurnign it, even with the bypass setup. I'm going to relocate my IAT sensor after the blower so the PCM will see real charge temps. I think I can then tune around the issue some. I may mess with that this weekend.

 

I got Allen Nelson sending me another tune with lower timing. I also ordered HPTuners so I can log and send that to Allen then get revised tunes by email. Got my wideband in and it shows near perfect A/F ratio. I need to change my IAT sensor too.....it's on my list of things to do...