SlingShotRX7

Someone local told me how to add a 2nd fuel pump easily.
and I just want some feed back on Whether its good, sound advice.

He tells me to just get a 2nd fuel pump, Like a Walbro.
Connect all the same Power/ground wires.
" T " in the fuel feed line to existing Fuel line,
and " T " the return the fuel lines the same way.
and either place the Fuel pump flat in the fuel cell.
Or Rubber band it on to the existing fuel pump.

Is this good/bad/questionable advice.

OR is it that easy??

thanks

93FD3S

I'd like to know as well. If not whats the best way to do it?

SlingShotRX7

Anyone have an opinion on doing a 2nd fuel pump like this???

Sounds like a piece of cake..

The guy goes on and states, that its " INSURANCE " just in case you
have a fuel pump failure..

1 buy a pump
" T " in the lines
use same power/ground lines
place in fuel tank..

Seems to easy

badfish229

What is the application for?

Broken09

iTrader: (1)

I have two held together with stainless hose clamps. This allowed me to adjust the pump positions so I don't starve either pump with the other and also made it easier to avoid the obstacles in the tank. Ran one line from each pump into an intank T fitting and then up.
-Nic

SlingShotRX7

So I guess it is that easy.

So there isn't a problem with to much FUel pressure on stock Fuel lines.
with 2 pumps pumping all the time??

Not a problem with 2 pumps drawing power from the same power supply???

Maxthe7man

I have been waiting for a Mallory external fuel pump for 3 weeks , I just found out, they haven't even built it yet, so a friend suggested using a 2nd walbro for the time being, so I bought an external one from him that I will used with my sumped tank, and will run the existing walbro in the stock location on the fuel sender pickup. So one pump will go on the sending unit,. the other one mounted on the rear of the tank from the sump, you could sump you tank and run 2 external walbros for a neat looking install and not have to used the smallish wiring that goes along with the stock sending unit to the stock pump. With the external, I will run 10 guage to a 30 amp relay to the pump.
Reading the manuals that came with my regulator and the 2nd pump, it looks like the stock lines are to small for supply and return, I am running new 1/2 steel supply line anyway, and will use both the stock supply and return as a return. My fuel output should approach about 400 litres per hour with the twin walbros , the regulator instructions stipulates that 1/2 or -8AN is good for up to 340 litres on the return side. Going by the walbro specs I would supposedely have 500 litres per hour, don't think thats gonna happen with 10 mm OD pump connections on it though.. The problem with to small of return will be not being able to turn down the fuel pressure past a certain point..Max

gzon

A better solution should be to use 2 seperate fuel pumps feeding one fuel rail each. Use 2 oem FPR one on each rail och replace with new bosch. and you will get a pretty solid fuel system without much money. A oem FD fuel pump has no problem feeding primary rail for exampe.

Broken09

iTrader: (1)

I have had no issues yet with my setup and the lines... This is a temporary fix as I will go to a surge tank and two external pumps probably this winter. I ran new wires for the pumps that were thicker gauge than stock and this seemed to help with power delivery.

SlingShotRX7

I just had an Epitimomy.. ( I know its spelled wrong)

But what do you guys think about using the STOCK OEM fuel pump
along with your Aftermarket Fuel pump, like a Walbro or upgraded fuel pump??

I think I still got my stock one in my basement somewhere...
Can the OEM fuel pump go bad, if its been sitting for several years??

And T both of those in together???

2 is always better than 1.

Broken09

iTrader: (1)

Frankly for the price you can pick up a slightly used walbro or supra tt pump off this forum or the supra forum I'd go that route if I were you. I picked my supra pump with 4000 miles on it off supraforums for under 80 bucks shipped.
-Nic

jdhuegel1

Honestly, I'd just run 2 Walboros. T-ing the Walboro to the OEM will result in the Walboro just over-powering the OEM pump and eventually causing failure. I have no experience with this, and it's just hear-say but.. sounds logical. You can get the Walboros for 89.00 each on Ebay and run them at 12V constant and be done with it.. That what I did and I've had no problems.

93FD3S

Would you be so kind enough to explain futher about your set up in greater detail? Any help would be great. Pics would be awsome..!! Thanks

BASTARD

iTrader: (4)

I would think that running two pumps in parrallel wouldn't force one pump to over power (or starve)the other. However running two pumps in tandem could

LETHAL RX7

iTrader: (1)

i run two intank pumps. each one feeds its own rail. mount the pump next to the other one. Put two bulk head fitting into the lid of the tank where you stock line is. Then use braided all the way up to each fuel rail. Each pump runs on its own relay also. Use a 10 guage wire or so for hots and grounds. Send the ground thru the relay not the hot. make sure the wiring is nice. thats the best way ..not most cost effective but.. you got the wrong car if that matters. hope this helps.
Greg

LETHAL RX7

iTrader: (1)

also for the return. i have a aeromotive fpr with two inlets. so a line from each rail goes to the regulator and then one comes out for the return.