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 Posted: 05-26-2018 02:08 am
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Esprit2

 

Joined: 05-01-2005
Location: Minneapolis, Minnesota USA
Posts: 575
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 The Zenith-Stromberg carbs (and Dellorto) like 1.5 to 2.5 psi. Anything in excess of 3.8 will probably cause problems from running rich to "spewing gas".

I know nothing about the AC Delco EP12, but the one For Sale ad I followed said it puts out 6 psi. That is too high for either the Z-S or Dellorto carbs. If you plan to continue using it, then install an adjustable, inline fuel pressure regulator as close to the carb inlets as possible, and set it to 2.5 psi.

Regards,
Tim Engel

Last edited on 03-17-2019 06:29 pm by Esprit2