hi everyone
i have a related question. my H20 has 44PHH carbs. i would like to change to
an electric fuel pump. at what pressure should the pump run?
thanks in advance
steve
675MIZU
________________________________
From: Gary and Cindy Ault <aultgc@att.net>
To: Paul <9laser3@bright.net>; Eddie <eddietude@socal.rr.com>
Cc: Datsun Roadster List <datsun-roadsters@autox.team.net>
Sent: Monday, February 23, 2009 6:30:21 PM
Subject: Re: [Roadsters] Fuel Line size
Paul,
Gasoline is essentially incompressible, so the fuel pressure will not
contribute to a difference in pressure loss upstream and downstream of the
pump. Differences in fluid velocity will, but I doubt that the use of the
same size line upstream and downstream of the pump will make any difference
in fuel delivery. But then, I'm not the engineer who designed the system,
so what do I know? Why the difference in line size? Beats me.
Gary
----- Original Message -----
From: "Paul" <9laser3@bright.net>
To: "'Eddie'" <eddietude@socal.rr.com>; "'Gary and Cindy Ault'"
<aultgc@att.net>
Cc: "'Datsun Roadster List'" <datsun-roadsters@autox.team.net>
Sent: Monday, February 23, 2009 6:20 AM
Subject: RE: [Roadsters] Fuel Line size
> The fuel from the tank to the pump is not under pressure so it requires a
> larger diameter. Past the pump, it's pressurized to the carbs.
>
> Paul (Just a guess?)
> Ohio
>
> -----Original Message-----
> On Behalf Of Eddie
>
> IT doesn't make much sense to have varying thicknesses in the fuel line,
> because the least sized section determines the MOST amount of fuel flow.
>
> But, thanks for the info. Do you have the metal line measurements in
> fractions?
>
> Eddie
>
> Gary and Cindy Ault wrote:
>> Eddie,
>>
>> The fuel line (metal line from the tank) in my '66 measures 0.265
>> inches OD; the brake lines measure 0.195 inches OD. All lines are
>> original.
>>
>> The rubber fuel line from the filter to the pump is 5/16-inch ID, and
>> the rubber line from the pump to the carbs is 1/4-inch ID. Why the
>> difference, I have no clue.
>>
>> Gary
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