[Chrysler300] Electric fuel pump & gas octane

["Donald Nissen" <fast-ace@xxxxxxxxxxx>]

I would like to add an electric pump to be used as a boost pump for starting. It would then be shut off and the mechanical pump would suck the gas through the electric pump. I know many owners  have done this, but my question is: Would the valves in the electric pump restrict the gas flow enough to starve the engine at higher speeds? Might it cause it to run lean? Our engines are thirsty beasts after all. Question 2: Is it necessary to use an octane boost additive to compensate for the crappy alcohol fuel we are forced to use? Or is it necessary to retard the timing some to compensate? Any consensus thinking?    
Don Nissen  300K

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