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I've never liked that idea.
The factory internal bypass is way higher than any normal pressure setting for carbs.
You can wind it up a bit more, or fit a slightly heavier spring.
In a bypass regulator setup, the excess is returned to the tank, and the pump bypass will never operate operate while spring loaded.
But it is there in case your front regulator jammed for some reason.
How much fuel pressure would the pump produce without a spring loaded bypass?
Food for thought?
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