S14 blowing fuel pump fuse

[Suhdude]

I have an 95 s14 with a 1uzfe. I just ran into an issue with my fuel pump fuse blowing out at my first event. I got about 6-7 runs in before it happened on the long stretch of the track which is for the most part WOT. right before getting into the corner the fuse blown, killing the car. Had it towed to my truck, replaced the fuse, got 2 runs in, did it again. Now I know I'm going to hear about checking for shorts, punches in wires, etc... but I've banged it around on the streets, and have driven very long distances with it with no issues. So I can't see any wiring being the issue. I feel like it may have to do with the pump getting hot? Most threads I see with the same issue is the fuse is blowing right as the keys turned, that's not the same issue here. I could start the car now and I'd trust it on a 50 mile trip. If I was to take it on the track, I'd estimate that I'd get a good 5 runs in before it does the same thing. I was told to also throw a bigger amp in there. I believe it takes 15, should I throw in a 30 and see what happens?
how long will the car run after fuse is blown? It should die right away, correct?

Has anyone else had this issue? I'm to the point I'm probably just going to invest in an walbro 255 but I'd rather not if it's not needed.

[centralcoaster33]

Welcome to NICO Club! A larger fuse might mask the issue and is not a solution. A blown fuel pump fuse should cut the engine within seconds. I have not had this issue. So, because you bang around on the streets, you believe you don't need to check your wires? I don't agree with that logic. Hot pump causing fuse blown? I don't think so, but maybe since heat does increase resistance in a circuit. However, that is where your daily driving logic does make sense. The pump doesn't work any harder on the track than on the street, it's always pumping at the same speed, pressure and temperature. That's why we have FPRs and injectors instead of variable rate fuel pumps. You have an engine swap, I'd think you have some modified wires and that's my first suspected place to check. You tossed an 8 in where a 4 was. Do V8's use the same sized pumps as I4's? I would guess no and suggest an upgrade to a pump that matches the engine.