I am running 24lb injectors with my 305(long story)

Anyways, I have a scanner and when I do n2o runs with a 88hp shot(dry) the injector pulse width is 10.2.-10.4.

At what point in the injector pulse width does it go lean, the number I mean?
12? 13?

I am wondering b/c I want to run a 100hp or 125 shot and I am not sure if I have to go to a bigger n2o jet b/c I am still running rich. I am running the leanest fuel jet I have(82)

I guess I can just keep using the scanner and going bigger n2o jets but the info before I possibly blow a motor would be alot better!

Thanks for your help!