Re: New toys from caterham...

09/10/2003 17:59:30, Julian West 
<[email protected]> wrote:

>If it's any help, I believe the Elise uses a combined unit. Any idea 
>what the flow rates are for these pumps (ie would one be man 
enough for 
>a 5 ltr V8?)

I doubt it, but... there's nothing to stop you running a bunch of 
them in parallel, to get the flow rate up. They've got check-valves, 
so if you want to turn some off during low-power times. This is my 
plan for the Cossie, anyway, since the fuel consumption ranges 
from a dribble at idle to a huge torrent on full boost/ full revs / 
full throttle. 
(I also reckon that a spare pump or two idling in the tank is a 
good thing, especially for touring, where a single pump is a bit of 
a weak spot)

Since the pumps are soo terrible at pumping air, it's also possible 
that, should any one pickup be uncovered, that pump will just 
spin, and the check valve will let the other(s) keep delivering fuel. 
Not the best way to stop surge, but it might work... 
A bit of cunning electronics, several widely spaced pumps in the 
tank, and you could always be sucking from the end of the tank 
with fuel sloshed to it, too. Ah, the possibilities.

Steve
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