Peter & Graham ,
further comments
1. you need one paper filter between the pump & the rear carb ,not two on the suction side , this could be a part of the problem with the pump having to suck through two filters that could be partially blocked.
2. An Electric pump at the rear will push the fuel through the original AC pump , my AC Ace Bristol was set up like that .
2. I agree Graham a pressure regulator might be needed at 4.5 psi or the needle & seat could flood the carbs .
More Problems ,Polarity another problem .
3.I'd buy a low pressure SU pump as a temporary fix (even a used one )which will give 2 - 3psi for the wedding then fix the AC Pump , as I have mentioned before they are a very simple forgiving design .
Geoff
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