I'm thinking about going with an LE1 package, and with it upgraded injectors and throttle body. I did a few searches, but I could not find a complete answer. So, does anyone know when the stock pump becomes a limiting factor for the necessary amount of fuel?

Thanks.

 

Normally anytime you add nitrous or any kind of forced induction whether its a turbo setup or supercharger, or when you do more advanced work to the engine e.g. 355, 383 etc. Theres many guys that run the hotcam kits making around 375-400hp an still using the stock fuel setup with the exception of bigger injectors. Theres people that run dry nitrous setups with stock fuel pumps, but i wouldnt want to take the risk of it running lean on you because that usually ends up costly.