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Fuel Chamber Overflowing


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Evening all,

So I've rebuilt my SU HS2 carbs on my Mk1 Spitfire as well as replacing the mechanical fuel pump and fuel lines but when I've come to set up the carbs, the float chambers are overflowing. The rebuild included new jets, needles, fuel float needles + seats and new floats.

I've tried to adjust the float level multiple times, cleaned the seats and needles and nothing I do cures the problem. I'm starting to believe the new pump is causing the line pressure to overcome the floats so I'm thinking of getting a fuel pressure regulator but I feel like thios shouldn't be necassary ūüėź

Any tips or ideas would be appreciated.



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