Fuel rail and fuel pressure 280z vs 280zx

[cesar280z]

Sorry for the question, what will be the difference in pressure between a 280zx FPR and the 280z's , question being , I am looking to replace my stock 280z with a 280zx, will it work, any toughs.thanks

[Zed Head]

They're the same. You can check the FSM, Engine Fuel section to be sure.

[FastWoman]

Yup, the same. I'm using an '81 ZX FPR on my '78 Z. I think the turbo version might be different, though.

[Zed Head]

cesar280z, I just realized that you asked two questions. The fuel pressure is the same. But the FPR itself will be different, between 1976 and a ZX. It's designed for the fuel rail.

But if you use the ZX rail and the ZX FPR, together (which is what you said you were doing), it will bolt right on, and be an improvement over the 1976 design.

FastWoman, your 1978 had the later FPR design with two ports; an in and an out. 1976 has three ports; two ins and one out. So the Zs before 1978 need to swap the rail and the FPR together. It's a better design anyway, with a one piece rail, instead of the three pieces connected by hose.

[cesar280z]

Thanks Guys, I just made a mistake and gave away a FPR for a ZX thinking I could retrofit my Z FPR ... I should had keep it .... Well seems I got to get another one

[tymarbry]

I have a question that is kinda relevant here. Is the 280zx fuel rail solid? because the 280z has a bunch of fule hoses that break all the time and Id rather have something with less parts that can break or something.

[Zed Head]

I think that they went to the one piece fuel rail in 1978. You're right, the old three piece rail tends to leak at the connections between rail pieces. I had a three foot fountain of needle thin fuel spraying from mine when it started leaking.

I have a ZX rail now, but had a 1978 rail for while. They're the same shape and design but the ZX rail was shinier.