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  1. Blackmamba

    91 octane to stop vapor lock?

    I have a stock 198 Slant six (71 Scamp) The same story, runs like a dream on the highway, but chokes in the city. *I've since had an Electric Fuel Pump with return line put in and re-plumbed the fuel line which solved everything :cheers:. Would filling up with 91+ octane (no ethanol) alone...
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