LS Swap Fuel Pump

[Vbb199]

Ep381 with a 87-91 k5 gas tank and sending unit to send the 60 psi to my efi.

 

[Blackbeard44]

thanks for the info, I am going to start rounding up parts

 

[Blackbeard44]

is the flange on the top of the tank the same?

 

[86 C10 Shortbed]

I used the Corvette inline pump with the filter mounted before the pump, I should have put a secondary filter after the pump but I've had no issues. I have dual 86 tanks with the standard sending units, going to the standard GM dual tank valve and standard switch on the dash.

You must be registered for see images attach

 

[custodian]

I use a walborro 550 mounted on my frame,corvette fuel filter has built in regulator, I am able to still use both tanks with no problems, I have been driving my LS swapped truck for 3 years now and it is dependable, I am going to look into putting pumps on the hangers in the tanks, I just have to come up with a way to switch the return into what ever tank I am using

Does that pump mounted on the rail pull gas from the saddle tank?

 

[Blackbeard44]

it does it pull fuel from the distrubition valve where the tanks tie in at, I used a corvette fuel filter with built in regulator and return line to feed the return back in the valve as well

 

[Blackbeard44]

in the future I want to hang pumps into the tanks, i really like that idea, than if one fails there is a back-up.
and also if I end up with a supercharger it would be nice to have a dedicated E85 tank

 

[custodian]

it does it pull fuel from the distrubition valve where the tanks tie in at, I used a corvette fuel filter with built in regulator and return line to feed the return back in the valve as well

I have a single tank.

 

[Blackbeard44]

it should be easier, depending on if your motor has a return from the fuel rail, some LS motors have a return at the fuel rail, some dont.

most carburated trucks should have a return line from the fuel pump

 

[custodian]

it should be easier, depending on if your motor has a return from the fuel rail, some LS motors have a return at the fuel rail, some dont.

most carburated trucks should have a return line from the fuel pump

The 5.3 I have does have a return line.

 

[Blackbeard44]

okay, than the return from the rail needs to tie into the return line on your truck.

I cannot find the exact pump I used but here is a link to an external mount walborro
https://www.tanksinc.com/index.cfm/...ct_id=675/category_id=61/mode=prod/prd675.htm

 

[custodian]

okay, than the return from the rail needs to tie into the return line on your truck.

I cannot find the exact pump I used but here is a link to an external mount walborro
https://www.tanksinc.com/index.cfm/...ct_id=675/category_id=61/mode=prod/prd675.htm

Thanks, what I understand then, I can use the saddle tank and the sending unit already on the tank, correct?

 

[Blackbeard44]

yes you will not have to remove the tank, that pump will bolt to the frame, eariler on in this thread other users listed part #'s for replacement hangers with pumps that will provide 58ish PSI for an LS motor

 

[custodian]

yes you will not have to remove the tank, that pump will bolt to the frame, eariler on in this thread other users listed part #'s for replacement hangers with pumps that will provide 58ish PSI for an LS motor

Thanks. Looking up those part numbers.

 

[Blackbeard44]

I think, I am pretty sure the mid-late90's vortec 350 truck motors required the same PSI of fuel pressure the LS motors need, and I am sure that I have read on this forum somewhere tjat those hangers are a direct replacement, but do your homework.

my 1985 fuel gauge is 30-90 ohms, 30 at empty, 90 when full, I imagine yours will be the same