Ran the car last night w/ the exact same setup as last time, except for the bigger -6 feed line from the bottle to the solenoid.
The weather was worse last night, yet the car still ran 1 mph faster. ET was almost the same as before. Back in September in better air it ran 8.95 at 149.7 mph. Last night it went 8.96 at 150.6 mph. Much warmer and humid last night...not sure what the DA was.
So maybe the bigger feed line leaned it out a little and gained me some MPH.
It got quicker when I brought the nitrous in faster.
For my last pass I took another degree of timing out and lowered the fuel pressure by about 1/4 lb., but the track went away.

CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax