Z31 fuel rails and larger injectors?

[ZR8ED]

Sorry for the weird q's.

 

JWT turbo injector upgrades for the Z31's require the use of the 84 300zxt fuel rail (for the Mercedes injectors) Now is it only 84 rails? The engines had significant mods between 84-86 and 87+ models (lots of different details) Anyways, I'm wondering if the fuel rails are the same between 84-86, or is the 84 rail somehow different than the following years. The reason I ask is that I have a spare 86 fuel rail an 87/ and an 88 fuel rail... I have no idea if the 84 is really different? JWT doesn't get into details why?

 

I'm still working on the supra 440cc injector deal with my supra buddies, and now I'm wondering if they will work with my 87 fuel rail (currently in my Z... or do I have to dig out my 86 rail?.. or do I have to go the distance and track down an 84 rail?...

 

Geeezzz.. how do I get myself into these things?.. I thought my car was done?

 

Luckily time is on my side.. winter is a long way from over.

[Arif]

ZR8ED,

Not sure about the fuel rail however I did install the Mercedes 450 injectors. After doing a search on them I found a site that had bosch injector flow rates and it had those injectors (same part #) flowing a lot less than everyone here thinks. If my memory serves correct they were 380cc instead of the 420cc that folks were claiming. I would do a bit more research before going to your friendly auto shop. I also went to the Z31 website and can no longer find the article that talks about using the Mercedes injectors instead of buying JWTs. Do more research than what other people say and you won't get hosed. Sounds like the Supra injectors are a better way to go if the flow rates are accurate.

[SleeperZ]

I suggest getting the injectors you WANT to use, then make rails to fit them. There are lots of materials and fittings out there, you can do almost anything you want. No need to limit yourself to stock rails that may or may not work.