77z280 Posted August 3, 2012 Share Posted August 3, 2012 I've been doing alot of thinking about the motor swap i wanna do in my z. lately i've been really fascinated with the ls1 swap, which seems pretty easy(minus the wiring and suspension upgrades). The main thing that has been on my mind about the swap is the engine wiring harness. I'vee been looking for a way around cutting/ splicing/ and crimping. Which leads me to a couple of questions i wanted to ask the z forum gods. Is there a engine harness for z cars that is premade for the 280/ls1 swap or would i have to do the custom wiring? Quote Link to comment Share on other sites More sharing options...
rags Posted August 4, 2012 Share Posted August 4, 2012 Search. There are many places that can supply you with a harness. IMO Speartech, although pricy, is the best. Joe Quote Link to comment Share on other sites More sharing options...
77z280 Posted August 4, 2012 Author Share Posted August 4, 2012 Ive google alot of "searches" but nothing has come up yet. I'll have to keep looking around to see if anything pops up. Would anybody know any good manufacturers around that seels good harnesses? Quote Link to comment Share on other sites More sharing options...
ihavearustedz Posted August 4, 2012 Share Posted August 4, 2012 I never used them but they might be able to help. http://www.wiringspecialties.com Quote Link to comment Share on other sites More sharing options...
Daz Posted August 4, 2012 Share Posted August 4, 2012 Ebay ! Look for LS1 stand alone harness. Quote Link to comment Share on other sites More sharing options...
UofA_ZCar Posted August 5, 2012 Share Posted August 5, 2012 I went with this one: http://www.chevythunder.com/ I have not installed it yet but it looks to be a good product. The instructions that come with it are very nicely done. Quote Link to comment Share on other sites More sharing options...
neverenough Posted August 6, 2012 Share Posted August 6, 2012 Just got my harness from chevythunder as well. Looks nice will be installing this week. Quote Link to comment Share on other sites More sharing options...
RebekahsZ Posted August 6, 2012 Share Posted August 6, 2012 There is NO pre-made harness fo swapping an LS-1 into a z-car. There are only harnesses for swapping LS-1 into a "generic" car. Some of the eBay,etc, aftermarket harnesses have more or less stuff included, for example fuse blocks and relays. Get as much stuff as you can for the money. In the end,you will have to modify whatever you buy. You will have to shorten wires that are too long and lengthen wires that are too short. Try to find a local LS tuner to reprogram your computer (which should come from the same model motor that you install). If you get your motor and car together, I can help you finish up. I would budget about $1000 for wiring if starting from scratch if you are not already experienced with LS-1 wiring. Quote Link to comment Share on other sites More sharing options...
shupee Posted August 10, 2012 Share Posted August 10, 2012 I used a Chevrolet truck harness and computer. I get them from a friend of mine that runs a very large junk yard. $100 for the computer and harness. The truck harness is a little more time consuming than the F body type but the end result can be great if you have a little patience. Quote Link to comment Share on other sites More sharing options...
Kenji Posted December 8, 2012 Share Posted December 8, 2012 I am going to use turnkey in Oceanside, CA Their harness looks so clean, I can't wait to take pictures of it. http://www.turnkeyenginesupply.com/ Quote Link to comment Share on other sites More sharing options...
240z72 Posted December 8, 2012 Share Posted December 8, 2012 1300 is a bit high IMO. Id go with a speartech harness. Best out the for the money. John is the owner. Hes a great guy and will help you out after as well. He has over 30+ years with gm electrical. Quote Link to comment Share on other sites More sharing options...
stony Posted December 8, 2012 Share Posted December 8, 2012 I never used them but they might be able to help. http://www.wiringspecialties.com Agreed^^^^^^ I used them for my RB harness. I'm pretty sure they do or can do a V-8 harness. They built my custom harness with a few phone conversations and it fit perfect. Quote Link to comment Share on other sites More sharing options...
Kevin.pk Posted December 8, 2012 Share Posted December 8, 2012 I used a psi conversions harness. Worked great. And i actually managed to mount the PCM in the stock location. Quote Link to comment Share on other sites More sharing options...
wfritts911 Posted December 8, 2012 Share Posted December 8, 2012 Don't be afraid to tackle the wiring yourself. There LS1 harness is pretty much a stand alone harness straight out of an F-body(I can't vouch for the truck harness). If you send your PCM off to get the VATS(Vehicle Anti Theft System nonsense) tuned out, you give power to 5 wires and ground to a couple of wires and the chassis/heads/etc, and it will start right up once you give power to the starter. It seems daunting at first, but the great thing about the LSx motors is the fan base is HUGE. If you look over on LS1tech or couple of the other forums(LS1.com, LS1LT1, etc) you will be able to find multiple guides on how to wire it up. Then its just a matter of removing the stuff you don't need and integrating wires for gauges and stuff like that. Like the members above have posted, I don't think anyone makes a plug and play harness for an S30, which means you are going to have to modify any harness you get, which means you might as well just modify a stock harness. But it all comes down to how much your time is worth, mine tends to be worth next to nothing, making it a lot cheaper for me to do everything myself. -Will Quote Link to comment Share on other sites More sharing options...
ktm Posted December 10, 2012 Share Posted December 10, 2012 (edited) Don't be afraid to tackle the wiring yourself. There LS1 harness is pretty much a stand alone harness straight out of an F-body(I can't vouch for the truck harness). If you send your PCM off to get the VATS(Vehicle Anti Theft System nonsense) tuned out, you give power to 5 wires and ground to a couple of wires and the chassis/heads/etc, and it will start right up once you give power to the starter. It seems daunting at first, but the great thing about the LSx motors is the fan base is HUGE. If you look over on LS1tech or couple of the other forums(LS1.com, LS1LT1, etc) you will be able to find multiple guides on how to wire it up. Then its just a matter of removing the stuff you don't need and integrating wires for gauges and stuff like that. Like the members above have posted, I don't think anyone makes a plug and play harness for an S30, which means you are going to have to modify any harness you get, which means you might as well just modify a stock harness. But it all comes down to how much your time is worth, mine tends to be worth next to nothing, making it a lot cheaper for me to do everything myself. -Will It's a few more wires, but I agree 100%. You have the fan low/hi wires, fuel pump wires (which are pulls to POWER and not ground, reverse of most operations), torque convertor lock-up if running the 4L60E and a few more if I recall correctly. The point as you made it, though, is spot on - the wiring is very easy. I used the stock F-body harness and was able to mount the PCM inside the car at the base of the firewall, right at the passengers feet. Edited December 10, 2012 by ktm Quote Link to comment Share on other sites More sharing options...
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