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Leon wrote:
For the power output that most of you have (less than 250 BHP), a 5/16"
high
pressure supply line is more than adequate, and a 1/4" return line is more
than adequate. For bigger power output (Hi Boost 13B & 20B engines, say up
to 400 Cheveaux) and a Hi Flo EFI pump , maybe a 3/8" supply line, and a
5/16" return line.
Just to put some numbers behind it, for anyone who cares. Assuming 15GPH for somewhere around 200Hp and a 1/4" fuel line (which has .049065cu.in. volume per linear inch of line):
15gal/hr * 1hr/3600sec * 231cu.in./gal * 1in/.049065cu.in * 1ft/12in = 1.634ft/sec flow rate for the used fuel.
You'll pump more than twice that (depending on the pump), with most of the fuel being returned to the tank, but I don't think there'd be much pressure loss in even 5ft/sec.
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