Well, I finally got around to doing some logged runs on the car last night with Datamaster. The car is a stock 97 LT4 Firehawk with a tune from Madwolf. On a 3rd gear run from 2800-6400, the O2s were very consistent from the mid 880s to the low 900s. No knock retard on this run, although while doing some logging and playing around with some short WOT runs I did occasionally see up to about 4.5 degrees retard under full throttle. I'm not too worried about it though as it wasn't consistantly there on long WOT runs. Here's some of the other data I collected:

Fuel Trim Cell: usually right at 15 under WOT

Short and Long Term Fuel Trim Counts: 128 at WOT, with part throttle lows around 113 and highs up to about 138

MAP (in KPa): running right at 94-100 at WOT

Injector Bandwith Pulse(@WOT): starts at about 18.8 @2900, peaks at 20.9@5100, dropping back to about 17.5@6400

Injector Duty Cylcle (computed): starts around 43 @2900, hit 80% at about 4700, and peaks at 97@6300, then drops off just a bit

From the Injetor duty cycle numbers, it looks like I'm pretty much pushing the limit of the current injectors. Guess I really need to step up to some bigger ones before doing any other mods.

Any other suggestions?

Oh yeah, guess I should post my last dyno with A/F too:

I haven't had it to the dyno and logged it with Datamaster at the same time yet, so I'm not sure how the O2s relate from a highway to dyno run.