I was shifting just a bit past peak HP, so around 6200 i think. This way it put me closer to peak HP for the next gear, IIRC. I had stock cams. I think i had a 2g maf, 550's, and stock IC/Plumbing. I was getting heatsoaked pretty bad by the end of 2nd gear at 17ish psi. I was turning consistent 13.4's with 1.7 60's, at about 99mph. Here's my one and only DSMtimes.org entry from that year...
#81 Anthony Lawton 13.415 99.32 8.469 80.54 1.769 sm16g
That day, and on others that year, i was running VERY consistently... until i dropped all my coolant on the freeway and didn't notice until it overheated so badly the spark plug wire boots melted in the bores. Needless to say, that engine was fucked. I haven't been to a track since, with a car that ran very well.
555/1000 is now almost done. I'm hoping to at least turn some low 12's out with that, on pump gas.