Fueling & Injection Fuel Pumps | Injectors | Rails | Regulators | Tanks

Possible fuel problem

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Old Jul 30, 2009 | 11:58 PM
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Default Possible fuel problem

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?
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