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Murphy uses the shortest accelerator pumps he can get, since they have the most fuel capacity. A garter spring (hidden) keeps tension on the cup, which helps keep it sealed against the pump cavity. The cups are methanol resistant, a plus when running California-spec gas. Murphy also pays attention to delayer spring length. If the spring binds, the pump can't compress the fluid and can't provide a full pump shot.
1984 Chevy Camaro - Power Struggle

 Murphy uses the shortest accelerator pumps he can get, since they have the most fuel capacity. A garter spring (hidden) keeps tension on the cup, which helps keep it sealed against the pump cavity. The cups are methanol resistant, a plus when running California-spec gas. Murphy also pays attention to delayer spring length. If the spring binds, the pump can't compress the fluid and can't provide a full pump shot.  View Related Article

 

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