I am running a small dry kit (currently jetted at 75hp) and having some issues. During a pass the car will start to slightly "break up" nearing 5000rpm. After doing some searching and seeing that nozzle placement is so critical, I decided to change this first. I am now running 2 nozzles in the lid like the NOS kit, as per their instructions. However, this did not solve my problem. So I proceeded to run a fuel pressure gauge and noticed that when the car breaks up, the fuel pressure gauge flickers.

Note: The car has 42# injectors and has been dyno-tuned with them.

Here is my questions;

How much hp can a stock in-tank fuel pump handle? In current form my car makes 384 rwhp (off the bottle) on a dynojet.

Could I possibly be testing the limits of the stock 98 pump?