XF EFI - Carby conversion

[Anonymous]

I have a fuel injected 86 XF S-pac which i want to do some engine mods to and have been told that mods are very limited with the EFI unless I change the computer or run LPG. How difficult is it to convert my engine to run a carby. I assume I will need to do the following things:
install the new intake mainifold and carby and remove the computer and any wiring that is no longer needed. Can I use my standard dizzy and coil set-up and can I use the efi fuel pump and fuel lines or will I need to change to a mechanical pump (if that is possible)? Thanks for any help or tips anyone can give me.

 

[wagon]

Mate, this is a rather well flogged horse for me.... The EFI system will handle a fair bit of engine modification, and will still run the car just fine!! Head work, valves, extractors, etc all work OK as long as you don't go insane! But, if you insist, to go to a carby you would need to change the dissy to a carby type + change the intake manifold + electrics and a mechanical fuel pump installed instead of the electric. I would keep the EFI, the driveability is superior and if you do decide the standard system is to limited for mods you could use an aftermarket computer eg. Megasquirt, Haltec, etc. It all depend how deep your pockets are!

 

[Anonymous]

I am in the middle of this very conversion, not to convert the car, but because my infected motor came with 2 garbage bags of wires and hoses and no way of knowing how to put it alltogether so I am running carb for now and set the injection back up later.

I have been told that injected motors have no cam lobe for the fuel pump, so I am running a $60 universal low pressure electric one from the auto parts shop.

You should be ably touse the EFi rocker cover with carby but that little vacuum thing right at the back is held by screws that go right through so you will have to plug them.

At the front left corner of the head there are 2 threaded holes for heater pipes, one to the heater and one to the carby manifold but on injected motors the top one is plugged by a bung with a 5/16 allen head. which on mine was tight enough to twist the end of the allen key so I am putting a T piece in the bottom hole and running both pipes off that.

Swapping the dissy is easy, there is a little notch in the edge of the distributor housing that when lined up with the groove in the rotor arm is the rfiring point for #1 cylinder os you line them up, pull the dissy and without turning the motor over fit the new dissy so the grooves line up and you have the motor roughly times, at least enough to get it running and put a timing light over it. You can also statiic time it by lining the timing marks up and then lining up the marks on the distributor, but put a timing light over it afterwards.

Good luck