Do I Need A Lift Pump On My 4ac To 4age Conversion

[ca18det_ae86]

hey peoples .

just dropped in a 16v in my ae86 I'm a lil confused , do i need 2 run a lift pump like i hear some people talkin about cause i was under the impression that i just run a external fuel pump like a vl pump or something .

do i need 2 open up the tank and put in anything in there?

any advice or links would be good peoples

thanks in advance

[Hiro Protagonist]

hey peoples .

just dropped in a 16v in my ae86 I'm a lil confused , do i need 2 run a lift pump like i hear some people talkin about cause i was under the impression that i just run a external fuel pump like a vl pump or something .

do i need 2 open up the tank and put in anything in there?

any advice or links would be good peoples

thanks in advance

 

Since the ADM AE86s were carby stock, the fuel tank is un-baffled. When you put an EFI engine in, you usually get a lift pump to a surge tank, and then run the high-pressure EFI pump off the surge tank. The reason for this is that EFI fuel pumps don't like running out of fuel, which can happen very easily in an un-baffled fuel tank (and is the reason why EFI cars have baffled fuel tanks). Carby fuel pumps run at much lower pressure, and the carby fuel bowl acts as a mini surge tank of it's own, thus negating the need for a baffled tank.

[Taz_Rx]

Some EFI pumps (VL ones included) also can't suck very well. The can push at 100 odd psi, but struggle to suck fuel UP from the tank.

[Karllos]

do your self a favour and get an AE86 fuel tank that is already EFI. They generally come with an EFI pump. Its a legal option and at least and one less thing the police can defect you for. :-)

[.T.]

te72 with efi 2tg (very rare, esp in aus) runs a baffled efi tank - that will bolt into a ae86.

 

another option is to get the efi pump & the plastic baffle from an efi tank fitted into your ae86 tank - speak to your local radiator place & see if they will do this for you (it involves steaming clean the tank then cutting it open to fit the efi pump - some won't do it)

 

T

[ca18det_ae86]

so do i have 2 run a external pump?

or can i just run 1 intake fuel pump and that should alright , with a surge tank?

[Taz_Rx]

Either:

 

Run an intank EFI pump or swap to an AE86 tank with pump installed as mentioned.

 

OR

 

Use normal carby tank, lift pump, surge tank and the VL main pump.

[ca18det_ae86]

thanks 4 all the info guys

ima go surge tank for sure , with a lift pump and vl pump .

can any1 tell me what kind of lift / pre pump 2 use? is facet any good?

do i need 2 get any psi minimum or liters per hr minimum?

[ca18det_ae86]

another quick question guys , i have a intank walbro fuel pump lying around , can i use that as my lift pump and it will work?

[Taz_Rx]

thanks 4 all the info guys

ima go surge tank for sure , with a lift pump and vl pump .

can any1 tell me what kind of lift / pre pump 2 use? is facet any good?

do i need 2 get any psi minimum or liters per hr minimum?

 

A facet would do yes. PSI doesn't really matter, it just needs to keep up with the VL pump flow wise. But if you have your return line coming back into the surge tank then its doesn't even need to flow as much as the VL as fuel is being returned to the surge tank.

 

another quick question guys , i have a intank walbro fuel pump lying around , can i use that as my lift pump and it will work?

 

Probably not. Why? - Most intank pumps have a relief valve on the that releases fuel out of the body of the pump. This is fine if you use the tank, but used as a lift pump it will hose down your boot.