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Originally Posted by RBS14
one common misconception is that high flow fuel pumps are necessicary. stock pump with 370's will do 250rwhp before it starts to lean out. a couple people have also run more fuel pressure via an adjustable regualator to get a little more flow out of their respective injectors too.
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It's not a misconception. The stock pump has enough fuel to go there, but the lifespan of a pump running full throttle is severely shortened. Then, if you're like me and drive with barely any gas (fuel pump coolant) it's as good as cooked.
Also, using an adjustable or rising rate fuel pressure regulator puts more stress on the pump, and every pump becomes less efficient when pumping more pressure. This cause lead to fuel starvation, and destroying your motor. It's $100, and I'm dead serious, don't fuck around with "skimping" on fuel. Even at 4psi, get a new $100 pump, or it will eventually be a $500 KA.
-Jeff