I have the chance to buy a L28et cheap but it doesn't have the harness or ecu with it. My car in n/a. I haven't been able to find any info in the computer. All I have been able to find is ever one saying just swap the harness and ecu with it. Can I get the N/A harness and ecu to work or should I just try to find a harness and ecu from a turbo car or Z31 turbo.

 

Unless you love headaches, and want to make the motor VERY limited on power... Get the L28ET efi harness. You could get one from a Z31T as well, but you'll probably have a harder time finding that one over an L28ET harness.

 

NA oil pump shaft, NA distributor, NA AFM. You'll have to adjust the spring in the AFM to dump more fuel at WOT since the NA computer won't compensate for added air due to boost levels.

WARNING!!!!
If you don't get the spring in the AFM adjusted just right, you will dump too much fuel throughout the entire rev range, you'll wash a cylinder and destroy your engine.

understand that the NA computer is in NO WAY set up to maintain a balanced A/F mixture under boost, and adjusting the spring in the AFM is only going to balance that A/F mixture out for a certain area of throttle usage. if you leave it stock, you'll run lean when you generate boost. if you set the spring to even out the a/f misture under boost, you'll run rich the rest of the time. This is where the turbo engine/NA computer combination gets dangerous. It becomes like tuning a carburator. you're only going to get one area where it will run great. the rest of the time you'll either be too lean or too rich. difference is with this set up, if you're out of tune, your performance doesn't just suffer, your engine will grenade.

It may be possible to remedy this issue with the use of a Rising Rate Fuel Pressure Regulator. You'd adjust the AFM spring to maintain propper A/F mixture at 0 boost or NA operating peramaters. Under boost, the RRFPR would increase the fuel pressure, dumping more fuel everytime the injectors open.

My personal advice: go buy a mega-squirt and skip all this jerry-rigging nonsense.

 

300ZX turbo wiring and ECU is an option.

You may need to extend the wires for a few specific sensors as you go.
If you're unfamiliar with the L28 then hopefully you have someone local that can help identify where sensors from the Z31 harness go on the L28 engine.

 

If you can, get an FSM for the both your n/a harness and the 300zxt harness if you choose to go that route. A wiring schematic will make life a lot easier, especially if you run into snags (which we all do) when trying to fire up your motor.

 

thanks guy. I think that I'm going to get the motor and try to find the ecu and harness for a 280zx turbo or z31 turbo. I have a couple pull a part salvage yards not to far from me.

 

Sorry guys dont mean to THREAD JACK. but i was thinking of making a thread with this same title. and also has to do with wiring...

I have my donor zxt three feet away from me and i took offf the tranny , drive shaft. manifolds turbo ETC ETC. its just the bare block laying in the engine bay and i want to take whatever parts of the harness i need OFF..

question is..

What EXACTLY (wiring harness related) do i need to take off ?
do i need to take everything ?

if someone has a diagram i can VISUALLY refferr too that would be great! thanx

this is my first time doing the turbo swap into a 71z and i want to do it myself (so i know it gets done RIGHT)

 

The EFI harness.... that's about it. We have many threads talking about S30 turbo swaps.

 

thanx alot nismo. yeah i noticed but since theres noone thats done a write up about it all i manage to come up with is the Z31 ecu and harness related issues.

do i need any of the relays or whatever that go on the pasenger side of the engine bay ? :/

any visual drawings or diagrams i could go off of. (im kind of the visual learner ) :P

 

https://www.zdriver.com/forums/240z-260z-280z-motor-swaps-non-v8-269/efi-ignition-setup-l28et-swap-27449/

Clicky (write-up): http://forums.hybridz.org/showthread.php?t=99620

Clicky (write-up): http://www.zcar.com/forums/read/1/55...682#msg-557682

 

You're a lifesaver bro. just managed to take both harnesses today and its all thanks to you.
if you like you can take a look at the ZCAR link you sent me i posted some pics. of my harnesses. some plugs look different than the ones that the threadmaker posted so i hope i go the right things out.

 

the differences are depending on what year the turbo car was. The 82/83 harness has a different connector for the CAS. And a few other minor ones.

 

Wouldn't an after market Fuel management system be an option as well? It will cost more but it is a lot more customizable and since you are going through all of that trouble anyway . . .

I guess it depends on what you want to do with it and how much you wanna spend.

Good luck with the swaps!!

 

actually as far as I've seen even the 82 and 83 harnesses have differences. I know from the HybridZ link there were wires they were showing to connect that never existed on my harness. Although there is the one diagram that someone made that was posted in the zcar.com writeup by wannabreZ that matched my harness.

 

82 and 83 harnesses are different. but only SLIGHTLY. it looks exactly the same but there are some plugs by the ECU plugs (like for the ignition harness and crap) that the wires are in a different order or color even.

 

Yeah I know the differences are slight, but that's one of the things that just makes it slightly harder for the writeups is just that every year turbo car had a different harness whether it be a big or small difference.

 

alrighty sweet. just wanted to make sure i got mine out right. since it did have a plug missing with a bunch of red wires near the ecu plugs. i kinds freaked lol i guess itl make the harness alot cleaner :P

 

The original poster isn't even responding or logging in anymore...

 

lol tell me about it. is he still alive :/ or did he have a stroke after seeing the harness mess :P