Plug and Play LS harness for 1996-1997 TLC

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Which LS motor would be the best and most reliable for swap? Giving up a bullet proof motor and tranny even though under powered is not the easiest choice to make.

The LS engines are nearly bulletproof too. My Camaro LS1 has 280,000 miles daily driven, autocrossed, occasionally drag, driven hard and still has good oil pressure, runs strong and doesn't burn much oil but of course with rigorous maintenance. The iron blocks are stronger for lots of power, as in 1000hp+ but the aluminum blocks can hold up to 1000, just look up the Texas speed Camaro with heads and cam running 9's and just under 1000hp stock bottom end.

That being said, there are minor differences when it comes to hard core racing with sustained 5-6K rpm's or 500hp+ at the wheels. The LS1 97-98 had smaller oil window in the rear, mid 99+ are preferred for high HP. The LS6 blocks are stronger and have bay windows that help oiling/cooling. LS1/LS6 timing chains are not as good as LS2/3/7/9

LS2 and iron equivalent (LQ9?) is the best all around choice for power, reliability, and availability only if you care about extreme numbers or don't want to worry, otherwise ANY LS is great. One thing that people do is put an Improved Racing oil pan baffle to prevent oil starvation in high G turns but could help off camber too. Also Accusumps are popular as insurance against low oil pressure situations (again for heavy racing).
 
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Lexus GS300 with destroked LS3 and lots of go fast track (road race) stuff. Stick tires, wide body, stripped, caged, mti sequential, and active Aero
 
So after plenty of searching for a harness how to I decided to look elsewhere. Well I came across Keith Bachman who builds custom merged harnesses for LS swaps. Now we did a lot of talking and info swapping on this. Finally he is confident that he can merge the FZJ80 harness to an LS harness and make it all plug and play with all gauges working using proper adapters and resistors including working OBD2. Well, what do you gents think?

I have a few questions?
Best place to buy new our nearly new (well used) FZJ80 engine harnesses?

How much for the harnesses that are burnt up? Wires can be repaired and replaced?

After we finish the FZJ80 OBD2 I plan on doing the OBD 1 1FZFE and then the 3FE. Any interest in that?

I'm also working on a set of engine mounts that will be either drop or simple weld in. For a simple setup. I'll share all that I find and make it easier for people who don't have the know how out where to start.


Whatever you do, don't do engine mounts like the AA ones. They suck balls.

I got a 5.7L vortec in a 91. Honestly there is not that much to the swap wiring wise. Although my trans indicator in the dash doesn't work and it would be kind of nice if it did. Difficult to do, I have looked into it. My OBD2 port is behind the glove box and easy to access. I have Easydiag on my iPhone and it works great. I have the check engine light and charge light on small lights mounted in an empty slot in the dash. I sure wouldn't mind them being in the stock locations but don't know how doable that is. The 80s use a circuit board cluster which makes getting everything up and running in the stock locations a bit tough. My gauges all work no probs and I think are fairly accurate. When my 5.7L dies I am going with a 5.3 and if you have a plug and play set up for wiring I certainly will consider it.

Cheers
 
Let me know if you want a copy my 93/94 pin out spread sheet. I put it together to help me figure the interface when I did my swap. A number of people on this board now have a copy of it and I would like to see it get put to good use. Pretty much everything happens through the IH1 and IH2 connectors and if someone could source just the plugs and pins then it could be possible to make a harness that plugs in between the gm harness and Toyota body harness. I had to sacrifice my 1FZ harness to make it work.
If possible I would like a copy of that, working on a parts list for a swap
 
being in the stock locations but don't know how doable that is
It's not bad - given all of the wisdom you've shared here I'm a little surprised by this response. You can easily splice in to the wires at the combination meter connector. Positive trigger, iirc all the neg on the bulbs share a common ground. Possible gotcha is the charge / alt wiring, I don't remember if there is a diode or anything that would isolate that circuit from the indicator bulb. Anyway, just for future reference there's also some blanks in 80 combi meters that you can add extra stuff to as well. HTH
 
I'm in California. I wish I knew how I could pull this off here. BUT ill be watching for sure!!
 
Is there a more recent thread with a vendor doing a complete wireharness for LS swap?

I've been considering offering this as i have a fulltime wiring harness guy, but moreso the 80 series harness fully prepped to interface with whatever LS harness you use. To me, it doesn't make much sense to make them one single harness. The 80 harness supplies power, gauges and gear indication. The ls harness runs the engine and transmission.
 
I've been considering offering this as i have a fulltime wiring harness guy, but moreso the 80 series harness fully prepped to interface with whatever LS harness you use. To me, it doesn't make much sense to make them one single harness. The 80 harness supplies power, gauges and gear indication. The ls harness runs the engine and transmission.
I agree, it probably is two. And I'd be fine with that. Either way, I (and am sure a lot of other non electrical engineering types), would love to look at a beautiful, 2023 wiring harness in my LS swap with a nice diagram that i could easily drop into my '97. I think the problem is that there are different kinds swaps out there and knowing where to merge them is dificult. For instance, I have an entirely GM drive train in mine so how do you hook up the Spedo to the GM Tcase? Thats a different wireing set up than someone who is running an adapter to the OEM toyota Tcase.

Regaurless. I would happily pay for someone to build and send me new wiring for my swap! at the moment there is at least a market of 1!
 
I agree, it probably is two. And I'd be fine with that. Either way, I (and am sure a lot of other non electrical engineering types), would love to look at a beautiful, 2023 wiring harness in my LS swap with a nice diagram that i could easily drop into my '97. I think the problem is that there are different kinds swaps out there and knowing where to merge them is dificult. For instance, I have an entirely GM drive train in mine so how do you hook up the Spedo to the GM Tcase? Thats a different wireing set up than someone who is running an adapter to the OEM toyota Tcase.

Regaurless. I would happily pay for someone to build and send me new wiring for my swap! at the moment there is at least a market of 1!
What t-case are you using?
 
Making an ls engine harness with an 80 harness doesn't make any sense. Now if one could make an 80 harness that was labeled or had some type of connector to plug the ls wiring in to the needed 80 wiring would make a little bit of sense the ls only needs a few wires to run. While the 80 side of things needs more if you want it to be complete .
 
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This was a few months ago before we relocated the fuel tank and put in the drive shafts. Ill take a picture this weekend with it all hooked up.
IMG_1484.jpg
 

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