L28ET S30 tucked in like stock... only better (pic heavy).
12-13-2012, 09:43 AM
#34
Well, you need the L28ET and EFI harness. 
"How much" depends on "how much you can buy one for". I've bought several complete 280zx turbo donor cars for $300 - $400.
After that, just swap motors, wire up the EFI, and fab the exhaust you want.
"How much" depends on "how much you can buy one for". I've bought several complete 280zx turbo donor cars for $300 - $400.
After that, just swap motors, wire up the EFI, and fab the exhaust you want.
05-17-2013, 01:33 PM
#35
Registered User
Join Date: May 2013
Posts: 14
I'm literally doing this exact swap(76 280z-280zxt engine) right now and I'm having difficulty mating the 280z stock ignition harness to the ZXT engine harness. I've searched for about a week and have found plenty of info on the subject, but none pertaining to my exact situation. I was wondering if you had any links that helped you that you could pass along or just advice that will make this go a bit smoother for me. I'm no wiring expert and this project is my first of this kind. I've heard from plenty of people that this is an easy swap, but those same people won't provide much helpful info on how to best do it. Just wanting this to go smooth. Thanks in advance.
05-17-2013, 08:04 PM
#36
Welcome to ZDriver!
This is the thread I and most everyone else has used: A quick FI and ignition 280zxt to S30 turbo swap guide - Turbo/Supercharger - HybridZ
A recent discussion (many "step-by-step" posts): https://www.zdriver.com/forums/240z-...ston-tx-37692/
In a nut shell, you need the entire L28ET efi harness, coil harness, efi relay, and both sides of the fuel pump relay plug including the relay.
The helpful diagram:
This is the thread I and most everyone else has used: A quick FI and ignition 280zxt to S30 turbo swap guide - Turbo/Supercharger - HybridZ
A recent discussion (many "step-by-step" posts
): https://www.zdriver.com/forums/240z-...ston-tx-37692/In a nut shell, you need the entire L28ET efi harness, coil harness, efi relay, and both sides of the fuel pump relay plug including the relay.
The helpful diagram:
05-29-2013, 11:36 AM
#37
Registered User
Join Date: May 2013
Posts: 14
I think I'm too noob for the "helpful diagram" to actually help me any. I can't seem to find plugs 1-3 on either of my two harnesses. I have two L28ET complete EFI Harnesses and don't know what year either of them are from. I also have no idea what year the L28ET I have is from. I will take pictures of what I'm working with and post them in a thread I will make, so I don't clutter up yours with my stupity. I know this car will be bananas once I get it running and I know it is just a few hours away. Thanks for the help Nismo. Definitely the most helpful Z forum out there.
05-29-2013, 11:44 AM
#38
This is a full panoramic pic I put together. The "plugs" in question integrate into the body harness, so you need both sides:
Last edited by NismoPick; 06-27-2016 at 09:32 PM. Reason: Fixed links
05-29-2013, 03:06 PM
#39
Registered User
Join Date: May 2013
Posts: 14
That actually helped a lot. Thanks. I have that exact harness, but I think I'm missing that separate loom with the coil ignitor plug attached to it. I'll look through my parts again to make sure and then I will have to buy it if I don't. Thanks a bunch dude. Gave me some new confidence to finally finish this swap. For a second I was starting to feel like all was lost. Haha. 
05-29-2013, 08:26 PM
#40
NisTuner
Join Date: Sep 2005
Location: Cleveland, Ohio
Posts: 2,800
It can be very confusing at first, but realistically once you kind of figure things out, there really isn't very much that needs to be hooked up to put the L28ET efi harness into the S30. One thing that I ended up doing was as I went a long I got some really tiny flat bladed screwdrivers from Sears. The tiniest two they had and I've used them to slowly pull pins and additional wires from the connectors/harness that are no longer needed. Saves me the trouble of taping up and tucking away additional wires.
05-31-2013, 12:04 AM
#41
Registered User
Join Date: May 2013
Posts: 14
Well with due diligence and the help I've gotten from different forums(mainly this thread), I'm going to try and finish this come monday. If I run into any snags I'll be sure to come back and hound you guys after I turn every rock to try and do it myself. Haha.
06-04-2013, 12:11 PM
#42
Registered User
Join Date: May 2013
Posts: 14
so this is where im confused at right now. I have these 3 plugs but don't know where they hook up to. I know the brown and green ( the last plug) goes to the + battery terminal, but am I supposed to slice it in our do I need the female side and write the female side to the + post. then there's the green relay. I'm not sure if im supposed to mess with it or just leave it alone. but the middle plug is the most confusing. the hybrid z thread doesn't seem to follow what the diagram says to do. maybe this other picture has some of the things it goes to. ill add the pics in a bit
06-04-2013, 12:26 PM
#43
I had an entire turbo parts car, so I actually used the 280zxt fusible link box. Otherwise you'd just need to attach them to approprate rated fuses and connect to battery, or use a fuse block distributor (commonly used for car stereos).
The fuel pump relay is left alone, but you do have to run switched power to it, and run the split green wire to the fuel pump wiring plug under the driver's dash.
The middle plug (assuming you are talking about Plug #2 on the diagram) is just for the coil / ignitor. Zoom in on that panoramic pic I posted. I've got a few other close up pics of those plugs I can post tonight.
The fuel pump relay is left alone, but you do have to run switched power to it, and run the split green wire to the fuel pump wiring plug under the driver's dash.
The middle plug (assuming you are talking about Plug #2 on the diagram) is just for the coil / ignitor. Zoom in on that panoramic pic I posted. I've got a few other close up pics of those plugs I can post tonight.
06-07-2013, 12:17 PM
#46
Registered User
Join Date: May 2013
Posts: 14
Noob question... I'm confused as to how to wire something to "switched power". Obviously wiring something to a "12v constant" would just be wiring it to the positive of the battery, but all the "12v switched" wires are confusing me at this point. Where do I wire them and what do I do to make them switch power. I'm speaking of the ones in your very helpful pictures ofcourse. Thanks in advance for your help. I really appreciate it.
06-07-2013, 12:29 PM
#47
Switched power means there is power "when the car is switched on". Key OFF = no power. So when the key is ON, there is power (just like wiring up a car stereo).
I used the switched power from the 4 wire plug under the 280Z dash (the same one that you hook into for the fuel pump).
So when the key is ON, there is power (just like wiring up a car stereo).I used the switched power from the 4 wire plug under the 280Z dash (the same one that you hook into for the fuel pump).
03-03-2014, 01:59 PM
#49
Registered User
Join Date: Mar 2014
Posts: 7
Homework
I haven't even got my car, sent check out today, but I am here learning what you guys have done with your cars. No need to recreate the wheel, only want it to turn faster. Learning what works and what doesn't. Nice to see the level of fine workmanship, talent here.
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