Harry,
What kind of check valves?
Photos?
Thanks,
Gary
Sent from my iPhone
> On Apr 21, 2021, at 2:09 PM, H B Elam via Tigers <tigers@autox.team.net>
> wrote:
>
> Hi all!
> I have had elex fuel pump problems since 1964 & an MGA. In my Tiger I have
> two pumps piped in parallel. There is no shifting valve as both have check
> valves. I only shift them electrically. The stock SU idles at 3.5 psi and the
> aftermarket at 4.2 psi. While I really can not notice any performance change
> I only use the aftermarket for troubles or autocrossing. The issue is not the
> carb but the float valve. My research indicated that most float valves are
> good for 7 psi.
>
> Harry Elam
> B382000471
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