Fuel pump questions

[Tom Cloud]

At 11:30 PM 12/8/97, bruce plecan <nacelp at bright.net> wrote:

>Ref Jags that run manual
>I'll be, sure enough on page 10-3, they show a pump with a return line
>extending to the bottom of the tank, also show the same set-up in the
>HO Conversion Manual.  Maybe with the OEM fuel pressure regulator this
>is nessecary, but in mine with the Mallory Fuel Pump, and Regulator
>the only way to route things and have it run was with a min of 
>backpressure in the return line.  In Alex Walordy's book Super Tuning
>when talking about Holley's TBI (page 23), he says you want zero back 
>pressure.  I have a tech no for Mallory, in the AM I'll give em a call.

Bruce, sorta been watching this thread ....  first, I've always been told
to *NEVER* use the canister return -- but then, whatta I know ?  when
I put my ProJection on my Bronco, I believed them and ran 3/8" return.
Put it into the filler neck -- you can hear it trickling back into the
tank if the cap's off.  checked the return line pressure ... zero on
my Summit 15# gauge -- doesn't even wiggle  ;-)

Then, someone says the fuel shouldn't drop into the tank .... have
I done something potentially dangerous ?    been running like this
for almost two years !!   could it be that it creates more in-tank
vapors ??  (doesn't sound right to me ??) .... or that it allows the
more volatile parts to separate out ??   please, if anyone knows
whether it's bad to allow the petrol to drop through the "air" in
the fuel tank back into the fuel reservoir, write and educate me !