DSMers typically use it just for spool up but NOS would be ok.
A 50-80 or even 100 shot across powerband after you have started moving. I'd wait unitll the suspension starts to settle. You could get a used system cheap. If it is a wet system you should be ok. I'd prefer AWD and a big turbo but in your case on your car it could do some good. The pistons in our motors have thicker tops, better top piston rings and better top ring placement because their turbo engines. Realistically the top ring should be where most NT rings are for max efficiency but they live longer on turbo motors if the are down farther on the piston.
That being said a good sensibly and well tuned WET NOS system is more at home on our engines than a honda with stock internals. Their factory sleeves blow (literally) and their pistons are really thin and light for efficiency. I would'nt use much NOS or it at all on a good size turbo. I'd just use a 50 shot for spoolup.
Case in point FP 3065 on the times list under 10sec beating lots of other cars with the silly gas.
But with a low pressure (factory) turbo a moderate nos level 25-50 with fuel should'nt hurt anything.
50-100 maybe 125-150 could be had as well. This may involve some timing control issues.
The first thing I'd so is exhaust from the downpipe back, intake, a 1g bov and a boost controler. Maybe just pull the BCS restrictor for now.
You can always put smaller jets in and use it for a spool aid later.