Tom,
No reason not to go injected if you do it correctly. Your using the
in-tank pump eliminates one of the biggest problems, vaporlock. I'm
with
Paul on using two pumps per tank if possible for redundancy. Carbs do
have their own set of problems, though they are simpler in execution.
Use all AN hardware on the fuel lines and a quality pressure
referenced
fuel pressure regulator and you will have it beat. Tuning is something
that a lot of people overlook on EFI, assuming that the sensors will
take care of everything. EFI will take some setup time, but after
mapping properly won't need to be messed with. I'm still for EFI,
albeit
done right.
Bill Jepson



Bill, Paul, anyone, what type of material should be used for the
plumbing?  Aluminum, Stainless?  AN fittings for sure.  I've been
thinking about tank valve selection.  It would be great if the tank
selector could also switch pumps.  IE electrical switch in conjunction
with the turn of the valve.  Minimizing pilot work load and fuel
management is a must.  What about a timer circuit with a take off
override.

I"m just brainstorming here, so bear with me.  In a vehicle.  We turn
the switch and the fuel pump dutifully starts pumping until we shut
down.  What about a timer which runs a circuit of say 15 minutes and
switches to the other tank automatically.  Of course you'd need sensors
to make sure the tank it is switching to has fuel prior to the switch.
This timer switch should only be armed with the manual valve in the both
setting. And you'd need a take off over ride which would run all pumps
in all tanks until you switched it off.  Then the timer would take over
and dutifully switch tanks until a predetermined amount of fuel was
remaining and a warning light and buzzer would inform the pilot of low
fuel, we have idiot lights in vehicles now why not planes?  And I agree
with Paul, the fuel gages must be very accurate.  My 2004 GMC Sierra
Pickup, tells me all sorts of information, If any of you electrical
geniuses out there are willing to take this on, I'm willing to buy, and
test.

T.W. Tom Webber RV8A
wings in process. Fuselage Kit on the way.


-------------------------------------------------
If you lock it down so it can't vibrate aluminum line is OK.
Short sections could be SS braided Teflon lined AN.

Some non Teflon AN line is fuel rated but it has a specific life
and must  be changed out every five years as I recall. I could be
way wrong on this.

Paul Lamar ...No rotor no motor.

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