Others would know better but you will kill most electric pumps if you dead
head them with a mechanical pump shut off so it is something you get to use
only once per pump. If not an efi system that runs the pump I personally
would do either one of two things and possibly both and be well within the
spirit of the rule. Run an RPM activated switch to run the ground side of
the pump relay or run a hobbs type pressue switch to run the +12 volts side
of the same relay or run both so if no oil pressure or no rpm shut the pump
off obviously run the power to said relay to the master kill switch. This
way if you lose oil pressure you might still have an engine if the engine
stops turning you have no fuel as well and if anyone, safety personel
included, pulls the master switch you have no fuel yet again. Pretty simple
to wire up let me know if you want any help with it.
Dave
> -----Original Message-----
> From: owner-land-speed@autox.team.net
> [mailto:owner-land-speed@autox.team.net]On Behalf Of Jim Webb
> Sent: Saturday, July 15, 2006 2:08 PM
> To: 'LSR List'
> Subject: Fuel Shut-off question
>
>
> Is a mechanical shut-off required for electric fuel systems? I
> know the book
> says something to the effect of all non-stock fuel systems require a fuel
> shut-off. Did I just answer my own question? <grin>. I know one
> time we got
> dinged in tech for not having a mechanical shut-off on a system
> that used a
> stock GM mechanical pump I know they are a good idea, but are they
> required?
>
>
>
> Thanks.
>
>
>
> Jim Webb
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