How much power can you make with a 6.0L truck before it's time to change the pump and what pump would you recommend if you're looking to make approx. an additional 150hp to the wheels? The truck currently has 42lb. injectors and a stock pump.

Thanks

 

Add at least an inline walbro pump. That should support an extra 150 without issue. But if the truck already has lots of miles, I'd just upgrade the tank pump with a walbro.

 

i had 42# injectors and would max out my stock fuel pump at wot.the psi would fall off.i installed the walbro in tank and cant max out the pump with the 42#ers now.was running real rich so i had to lean it out to bring it in line with what i wanted to run around 11.8...