Voltage regulator, now fuel system boosters

[Greg Hermann]

>In a message dated 1/2/99 11:38:18 AM Eastern Standard Time, bearbvd at sni.net
>writes:
>
>> >How about using a big pump and cutting the voltage when all that
>>  >capacity is not required? Will the pump last longer, etc.???
>
>Some Buick & Syphoon turbo blokes use a *staged* pump
>arrangement that allows you to pre-set the boost level at which
>a second in-tank pump is switched on.  The kit includes a 30amp
>relay and wire harness, etc   I believe one such kitt is available from ATR

Who and where is ATR??

>Some users of this setup report a 2-5 psi jump in pressure when the
>extra fuel volume, from a second Walbro 308 pump,

See the comment below, but this jump is simply demonstrating what I am
talking about below in terms of accuracy of pressure regulation. The port
in the regulator used is not big enough, plus it needs time to react.

Who is Walbro, where are they.??

Basically, I am looking for sources for good quality, large volume, but
really don't have to be high pressure, submersible fuel pumps.
Controlled voltage to a pump is still more elegant than staging, since
varying voltage to a DC motor varies its speed (and therefore the volume
output) infinitely.  Hence the desire for variable speed pump drive. Tom is
RIGHT! Running a big pump at lower voltage/speed most of the time will do
the job, and increase pump life IMPRESSIVELY!
If one wants to get seriously complicated, it is very feasible to vary the
speed of one pump, and then stage in a second, constant speed pump for big
loads. (The first, variable speed, pump slows back down when the second
pump first comes on, then speeds back up as load increases further.)

 hits the FP regulator .

It is way easier (and much more efficient and accurate) to regulate
pressure precisely if flow through the pressure regulator is fairly
constant.

> I only wish to own/operate such a thirsty beast in my lifetime.  8~)

The output would certainly be nice, but maybe with about 10% less thirst
would be even nicer!! :-)

Regards, Greg
>    Mike V