EFI, Pump in Tank or Inline?

[fleming442]

In tank pump on a GN/TBI Monte sender gets you a 5/16" return that goes down to the pump inlet instead of the 1/4" vent at the top. The baffling in the tank helps a bunch, too.

 

[GPNX]

i just used the stock non baffled tank and haven't had a problem. i would also drop the gas tank instead of cutting a panel in the trunk. it's not bad to drop the tank.

 

[Northernregal]

My Aeromotive 340 in tank is quiet, you dont even notice when the car is running.

You could get away with a cheap walbro 255 and a efi sending unit. Unless you drive very aggressively or like to run your tank empty I dont think you would benefit from a baffled tank. I found a bulkhead to pass a second set of power lines to my second pump if you choose to use your carb sending unit.

 

[pontiacgp]

In tank pump on a GN/TBI Monte sender gets you a 5/16" return that goes down to the pump inlet instead of the 1/4" vent at the top. The baffling in the tank helps a bunch, too.

the return from the charcoal canister is a 5/16" return when the valve is removed...I don't have any baffling though so I'm leaning towards installing a proper tank with the pump......so far I have .02 cents saved up for it....

 

[Winkernod]

When I did the 5.3 last year I went with a new baffled tank a new sending unit and a A/M Walboro 255 pump I strung new high pressure braided line with AN fittings for the feed and used the original line for the return (low pressure) and left the vent tube to the charcoal can in place and removed the canister and put a aquarium bubblier stone in the end as a filter. Ran all summer as a daily and really happy with it.

 

[pontiacgp]

When I did the 5.3 last year I went with a new baffled tank a new sending unit and a A/M Walboro 255 pump I strung new high pressure braided line with AN fittings for the feed and used the original line for the return (low pressure) and left the vent tube to the charcoal can in place and removed the canister and put a aquarium bubblier stone in the end as a filter. Ran all summer as a daily and really happy with it.

I do not want to leave the charcoal canister in place since there is no line coming from the "carb". The omission cops they have in Ontario would not understand there is no need for the line since the efi has a return line and issue me a $380 ticket.

 

[Winkernod]

I do not want to leave the charcoal canister in place since there is no line coming from the "carb". The omission cops they have in Ontario would not understand there is no need for the line since the efi has a return line and issue me a $380 ticket.

I did take the charcoal canister out and tucked the hose in underneath the fender so you don't see anything

 

[-83MONTESS-]

Not to hijack the thread, but where do people find sending units with 3/8 lines instead of 5/16?

 

[pontiacgp]

Not to hijack the thread, but where do people find sending units with 3/8 lines instead of 5/16?

you can always remove the 5/16" vent or return tube and replace it with a 3/8" an fitting

 

[Winkernod]

Not to hijack the thread, but where do people find sending units with 3/8 lines instead of 5/16?

Product

Spectra Premium FG156A from the Sending Unit Classic product line.

ecat.spectrapremium.com