how much nitrous will a stock magnum motor take

thanks for all the replies. i just picked up a pieced together cheater kit thats adjustable from 100-300, i have a 2 gallon rci fuel cell separate from my tank and another holley blue pump. i still need to get a wot switch bottle brackets blow down tube and a purge kit.

anyone know the rules for running nitrous at the track?

No set in stone rules, but there should be 2 in my book.

No warming bottle with torch.
No loose bottle in car.