DynoJet testing of ZZ4-TPI w/ LT4 HOT cam

To compare the benefit (anticipated) of the AFR190 heads, I took my car up to a local shop with a DynoJet Chassis Dyno for some "pre-swap" tests.  The graphs and data are below:

This shows the 3 runs I made (run3 didn't record any RPM data and was thrown out).  Nothing was changed between runs for the result of making sure the runs are consistant. (which the graphs clearly show)

This graph picks out the Actual data from the last run and shows the Peak and Average data for both HP and Torque.  I was VERY surprised to see the car/motor make such good average power across the test RPM range, even out to and beyond 6000 RPM!  This really contridicts the notion of TPI (at least stock) making no useful power beyond the ~4800 RPM range.  (The TPI currently consists of 58mm TB, fully ported plenum, AS&M largetube runners, and highly ported Edelbrock base)

The raw numbers pulled from the above graph are listed below:
 

RPM
Torque
HP
3600
350
240
3800
350
250
4000
345
263
4200
340
271
4400
331
278
4600
321
281
4800
310
283
5000
295
281
5200
283
280
5400
271
278
5600
256
272
5800
242
270
6000
235
270
6200
224
264
6300
220
262
AVG.
291.5
269.5

Through published engine dyno info on the ZZ4/HOT cam combination, I was assuming I was pulling about 380-390 HP at the flywheel.  Estimates of Automatic transmission drivetrain losses are usually given as 20-25% which would estimate my car as having 285-312 rwHP.  The major unknown was the TPI, since not much Mfg. data can be exactly correlated between the factory carburator testing, and real-world TPI cars.

Quarter-mile ET/MPH HP estimating formulas usually would put me in the 310-340 rwHP range given my best ET/MPH  (12.85 sec / 106.95 mph) and my driven weight of 3680 lbs.
 

Diacom scans from the 4 runs show knock/retard at 3200rpms which I traced to a large jump in the ARAP PE spk-adv table I had copied over to my MAP chip base. I have since remove it.
Runs 1 and 2
Runs 3 and 4