EFI Fuel Tanks

[Aussie260z]

Does anyone know of a fuel tank that is baffled and that has an internal EFI fuel pump that can be easily adapted to fit into a 260z?

Like an Skyline fuel tank? or a tank from a later 80's Pulsar............

[Aussie260z]

This was a hot topic..............

I came across a 1977 260z 2 Seater, when i was stripping it, i got to the fuel tank, and was amazed to find an external fuel pump, i followed its fuel lines and it led to a factory mounted (well it looked very factory) surge tank behind the drivers side rear strut, inside the cabin,

Therefore there is mounting bracketry for the external fuel pump and a surge tank that would perfectly fit my 1974 Zed,

So if anyone is planning on switching to EFI on a pre 1975 Zed, just grab all the fuel stuff from a 1975 onwards Zed and put it into your car, only thing you would have to change would be the regular Zed external pump to a EFI suitable fuel pump,

Im saying pre 1975 & after 1975 because that was when the 280z was released with EFI in the states, so im assuming that is when they made the mods to the external surge tank and fuel pump, but i could be wrong on this.................

[Mr Camouflage]

I always thought that was an expansion tank.

[sblake01]

When you say 'fuel stuff', I'm assuming you mean the lines, hoses etc. You would also need to switch to the system of relays that go with the fuel injection. And yes, that is an expansion tank rather than a surge tank.

[Aussie260z]

What is an expanision tank?

[sblake01]

It's part of the evaporative emissions control. Datsun actually refers to it as 'vapor-liquid separtor' in the FSM.

[Aussie260z]

So no fuel actually ever goes into this expansion tank just fuel vapors??? and it is there because of pollution requirements,

If thats the case, what sort of fuel systems did the 280z's have?

A lift pump inside the fuel tank and an external EFi pump?

Or

Did they have a lift pump, surge tank and EFI pump arrangement all external to the fuel tank?

& Did the late 260z's supplied to Australia have the same basic equipment as the EFI 280z's, except instead of an EFI rated fuel pump, they just had a carby rated electric fuel pump?

Dont suppose its a good idea to use the 'vapor-liquid separtor' as a surge tank and mount it inside the cabin, probably get a few to many fuel vapours

[sblake01]

Everything is extenal to the tank. The 'vapor-liquid seperator' is inside the cabin. It's in the hatch area above the right wheel well. There is also a charcoal cannister under the hood that ties in with this system. Don't know about the Aussie 260z's.

[Mr Camouflage]

The expansion tank catches vapours, and maybe fuel if the tank is really full. Say you filled the tank full on a cool night, and the next day the temperature ges to 40 degrees centigrade, as it can do in a summers day in australia.

As the fuels expands, it has to go somwhere, as does the air in the tank too. the 240z just dumps the extra fuel out through the overlow pipe behind the back wheel, not very enviromentally friendly, and not too safe I suppose either.

The 260z had the expansion tank. when thats full, then I guess there is an overflow pipe too.

Dont know that the 280z turbo tank had.

I guess you could use the interal expansion tank as a surge tank, as long as it never leaked, but then you wouldnt have an expansion tank.

[sblake01]

The US 280z (no such thing as a 280z turbo, not factory anyway) vents the vapors through the foam filter in the bottom of the charcoal cannister.

[Aussie260z]

So i assume that the 280z EFI'd car had some sort of surge tank mounted externally to the fuel tank, in addition to the Life pump & EFI pump...........then had all the pollution gear including the 'vapor-liquid seperator' mounted inside the cabin and charcoal canister in the engine bay,

What about the 260z's released in Australia after 1975??? did they also have an external surge tank fitted???

Im converting to an EFI'd engine and i want to know what ive got there on my 1977 260z parts car,

Its all going into a 1974 260z,

[drunkenmaster]

no Z as far as i am aware had a surge tank, especially a carbie'd one.

My '77 sure didnt, and there would be no need for one with the fuel sitting in the carbs.