popping noise with nitrous

[93svt]

Thanks for the info, I will see what happens. It is still pretty close to stock, but has a decent size cam in it, don't know what exactly. Was told it was an X303, but no way that would clear the valves, especially with the stock 1.7 rockers. I don't shift that high though, more around 6000. Still getting used to the car. Thanks.