RE: [Chrysler300] cold start

[Ryan Hill <ryan_hillc300@xxxxxxxxxxx>]

An added note on Holley (and any aftermarket electric fuel pump). Most of these pumps operate at a higher pressure than your stock pump and are intended to be used in conjunction with a fuel pressure regulator. In many cases the pump pressure can overwhelm the needle and seat valve and flood the carburator while idling or while the engine is off. Keep this in mind when priming the fuel line or leaving the pump on while driving.Ryan  


To: wikki123@xxxxxxxxxxxxx; chrysler300@xxxxxxxxxxxxxxxxxxx: whuff@xxxxxxxxxxxxxx: Sat, 29 Dec 2007 15:06:31 -0500Subject: Re: [Chrysler300] cold start




Victor,I have used the old Holley blue pumps for years. The instructions say to run them for a few minutes every month, just for the exercise. I have let them sit for several months with no adverse effects. There has never been an issue with pulling fuel through them when not in use, even with my 440 engines, although the engine starves while racing with open headers if the electric pump is not on. But that is why I put the pump on that car anyway. And they do make starting easier after the car sits for a while.About running the pump all the time, that is extremely dangerous unless there is an automated way, such as an oil pressure activated switch that is in the circuit. Fords use an inertia switch to kill the fuel pump in an accident, they should be readily available new or in surplus yards. In the event of an accident, the pump would continue to pump as long as the ignition switch was on, even if the fuel line ruptured. Not good.Bill HuffAt 12/29/200712:44 PM, VICTOR KOONTZ wrote:>I took your advice & put an elec. fuel pump on my 300F. With it on & >the engine off there's a very small flow at the carbs but after 15 >secs. the car will start with very little cranking(which is good).My >question now is ,once the car is running should the elec. pump stay >on,& does this cause too much pressure to the mechanical pump,or if >the elec. pump is shut off does this pump restrict the flow of fuel >too much? If so what is the remedy?[Non-text portions of this message have been removed] 






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