most street pumps are about 5-7 psi which a carb will only need max 7 psi or it will ift the needle from the seat..If its a "race" type pump, they might have a higher output like a electric pump.At that point you would use a regulator.Theres 2 types, a "dead head" which does not return fuel,heat up the fuel and puts stress on the pump or a return style that returns the unused fuel to the tank, so a "cool" supply of fuel is always pumped forward.
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