fuel questions and running 2 tanks parrallel

[IDIoit]

good morning folks!

im working on this 89 F350 with a 96 PSD.

i am about to finish up the fuel system this weekend.

i have both tanks installed, and i want to delete the FSV, as i dont know if the brick stuff
will work with the OBS stuff, and to cut down on some of my wiring.


i plan on running both tanks at the same time.

anything special i need to do so it does not suck air from 1 tank as it feeds the engine?

maybe a check valve in the smaller tank?

also,

the incoming lines to the engine are of the same size.
one has a blue wrapping around the stainless steel hose.

which one is the feed and which one is the return?

thanks for the help

 

[OLDBULL8]

You can't use two different size tanks without a FSV, the return fuel will overflow in one or the other tank. The 89 should have all that's needed to seperate each tank.

Are you using the 96 PSD fuel filter bowl?

 

[IDIoit]

yes. the 96 is bone stock.
minus turbo.

this truck was a 460 truck, if thats the case, ill do mechanical valves.

 

[IDIoit]

well i was going to do a mechanical valve swap, but i found a wiring harness that was not hacked.
so it looks like ill be going to stock!!!

are these FSV's the same as the IDI's for the powerstroke?

 

[OLDBULL8]

Should be the same FSV, but the 99 up only have one 40 Gal. tank. Did ya get the Pkg. yet?

 

[IDIoit]

yes sir
thank you!!!
i havnt had a chance to open it yet.

i hope to have some spare time today.