280ZX TO REPLACE 260Z MOTOR

[darren]

Has anyone done a transplant using a 280zx efi motor to replace the 260z motor, and will it bolt to the 5 spd? how hard is it" any info would be great or anyone knowing of a site about doing this.

Regard's Darren

[Toecutter]

Very common conversion Darren. I've got a 280zx motor sitting in the garage which will bolt up to the existing gearbox however I've decided to stick with the old 240 carbs but you should'nt have any problems with the EFI set up just make sure you've got the loom for the motor. There are quite a few guys here the can give you more precise info.

 

cheers

sulio

[Zeddophile]

I have a 280zx efi motor in mine, it bolts straight in. I swapped the 280zx gearbox in before i did the engine swap, and the box bolted up to the 260 motor fine, so I would imagine that the 260 box should bolt to the 280 motor just as simply.

 

You will find that when you put the intake tracts in, that the air flow meter needs to be turned to a pretty specific angle to fit in easily, and that your air filter will need to be placed in front of the radiator for reasons of space.

 

You should ideally put an electric fuel pump in somewhere, mine is running a VL commodore external fuel pump at the tank. Upgrade your flexible fuel lines to EFI spec hose and hose clamps, and its recommended but not entirely necessary to change your fuel pipe (hard lines) to a bigger diameter.

 

Beyond that, from memory its a very simple swap. Lot of people running 280zx blocks with 260 or 240 gear bolted to the top, so the gearbox shouldn't be an issue I imagine. Any questions, ask away.

[darren]

but how doe's the ems work with changing to a manual box when the 280zx set up i have is auto? Regard's Darren :?:

[NZeder]

Going to Auto to manual is easy - you need to remove the flexiplate from the auto L28e engine, install the bush/bearing in the rear of the crankshaft (auto don't have) then insall the flywheel and drop the engine in.

[Zeddophile]

if by ems you mean the engine computer, as far as I'm aware the 280zx computer does not take any inputs from the auto.

[lambs]

as far as I'm aware the 280zx computer does not take any inputs from the auto.

 

It doesn't. 280ZX uses L-Jetronic analogue EFI system which is engine dedicated. Auto in 280ZX and all Nissans up to and inc R30 are hydraulic with vac load sensing.....there's no separate management 'computer'

[VertexZ]

i had it in mine as well. everything bolts up perfectly. The hard bit is wiring it all up. 280zx factory manual would help there.

 

As said, you need to run the 280zx airbox infront of the radiator (or use a pud filter). Proably worth whole going to thermo fans as well.

 

I used the standard 280zx electric fuel pump. Perhaps the only minor issue is that there is no surge tank. Basically, if you go around a corner at speed, and have less than 1/4 tank of fuel, it will probably stutter a little through lack of fuel. I never really had a major problem with this though.

[darren]

Thank u for all that info it has been a great help, one last thing is it worth doing the trans plant :idea: Regard's Darren

[lambs]

one last thing is it worth doing the trans plant

 

Yes, even if you just bolt in the L28 without the EFI......but use 240Z carbs if you still have the original 260Z type (ie turf em).

[JBWetzels]

Hey Darren, if you need a good fuel pump pm me

[sco_aus]

I used a 240k gearbox, bulk acceleration :twisted: , though there were 2 gear changes to 100. . Cruised great at 110kph though .

[darren]

thankyou all for your advise is there really that much of a change? or should i try to keep the engine number's and the body number's the same?

Darren

[Mr Camouflage]

It's your car, do what you like.

 

If your worried about resale value, some buyers prefer to get the car with the original engine (the engine number thats stamped into the id tag). But that mostly applies to the 240z, and sticklers for originality.

 

You can keep the original motor as well, and have your fun with the L28, and if you ever decide to sell the car, you still have the original engine that gan go with it.

 

If you dont go with the L28, you can still do some work to the L26 to increase the power.

 

 

Body numbers and engine numbers the same?

Dunno what you mean. the engine number is never going to be the same as the chassis number.