I would start with a 50 shot and work your way to a 100 shot. With a wet system spraying thur the blower i would not spray more than a 100 shot. a bigger shot than this will be hard to get every cylinder the proper nos/fuel mixture. If it was a dry setup you could for sure bump it up.. As long as your air/fuel ratio is safe you should not have problems with the nitrous.
Yea I definitely won't be spraying any more than 100.. just was looking for a little more power and not deal with looking for e85 every time I drive the car..this way I can fill on 93 and have race gas in the fuel cell for when I spray