I don't know how this would translate to ET times, but turbo sizing has different results on boost psi and spool.
For example:
I have a simple 67mm journal bearing turbo. I am at like 1psi at 3000 rpm's and 4200 about 7psi.
Some other members that run precision turbo's or twin turbo motors are hitting 7-8psi at 3500.
I have seen examples of dyno sheets that the smaller turbos that run out of steam over 6k rpm's and boost drops from peak of 8 down to 6 by redline.
My issue with launch is if I rev to 5500+ and dump the clutch I stay on boost and spin the tires. At 4000 rpm launch I fall off boost. Even with 400rwhp I trapped 120 several times. Unfortunately I am an idiot sometimes and while watching my boost, afr gauge, the guy lined up next to me I missed my 1-2 or 2-3 shift probably knocking off 1/2 second.
The advantage of a 58mm turbo is it probably is on 3-5psi at 3000 so you never really fall of boost or bog down on the line.
I also don't know wheather to rev it to 8200 in 3rd or shift at 7800 into 4th. Any advice would be greatly appreciated on this particular question because I think 3rd gear redlines in the high 110-115mph area. I run 17/18 street tires.
Please don't take this as me not liking my turbo, in fact I like a small amount of lag because when boost comes on its like crazy.