LS1 Harness from Speartech

[DaleMX]

Hello all,

 

Would someone who has done the LS1 conversion please take a look at this and tell me if I have my facts straight on having a harness made for my conversion. Below is a proposed letter to the supplier I have chosen. Please hack away or tell me if you think I'm correct, or if I have forgotten something.

 

Thanks for your time,

Dale

 

Speartech ( http://www.speartech.com )

 

Hello John,

 

Ok, I am ready to order a harness. The swap will be putting a 1999 LS1/T56 from a firebird into a 1978 Datsun 280Z. No emissions equipment will be used. I will be putting the ECM inside on the passenger side around the area of the heater blower. I believe the stock length on the connectors is enough, but If you can add 6†it wouldn’t hurt. Also I am going to be running long tube headers so the pre-cat O2 sensor wires need to be long enough to reach. I plan on putting the diagnostic connector under the dash close to the driver side and that connector I assume will be coming straight from the computer connector and over so about 20†to 24†should be enough on that. I will be using a 2 speed fan from a ford Taurus. If I need to run a sensor to the radiator and keep it separate from the computer then that’s ok.. I will also be running A/C. The compressor will be mounted high on the drivers side. The alternator will remain in the stock low position. I would also like a reverse lockout function. I will be running all AutoMeter gauges (electric speedo, tach, oil pressure, water temp, fuel level, etc…). I have LS1 edit so I will disable the VATS, turn off the cats, etc… on my own (famous last words). I also have EFI live FWIW.

 

The kit I am using to mount the LS1 is from Johns Cars http://www.brokenkitty.com/zcar/zcar.htm and for what it’s worth I have found these folks to be very helpful.

 

I am putting together a relay center for the car. I am planning on using a relay for the fuel pump (40A), the headlights 2x(30A), The Taurus Fan 2x(70A), and anything else that need one. The relays will be mounted on a circuit board ( I make circuit boards for a living http://www.innovative-circuits.com I’m the chief engineer) and can fit as many as needed.

 

Please let me know if there will be any extra charges for this custom cable.

 

Dale Lovell

[mark]

Dale,

I taked to speartech last week. You covered more than I thought to ask. I would call them and read you letter and see if they can offer any input. I'll be sending my harness to them soon. They were very helpful on the phone for what it's worth. Mark

[qwik240z]

Dale,

 

I also sent an email to John at speartech last week. I think you have it all covered. I guess you are not going to use the S & P harness you bought on eBay??

 

What is the chance you will make another relay board for me too?

 

Keep us posted on the harness

[tannji]

I also would be interested in a Relay board, tho I suppose it is not beyond me to do some Radio Shack cobbleing. If you decide that it wouldnt be a total waste of your time, sign me up!

[DaleMX]

Yea, I've decided to sell the S&P harness instead of butchering it and go with a custom cable. Those guys do great work so I'll not try to re-invent the LS1 harness.

 

I'll make some spare relay boards, no problem. I dont have a time frame for finishing it, and I was planning on doing it sometime during the summer. If your willing to wait, I'll be glad to make them. I have a good source for sockets and relays and had to make a minimum buy. I'll figure up my cost for them and pass it on (they were cheap).

 

Dale

[tannji]

that would be awesome.... I am not on an accelerated schedule either... waiting for the new garage sometime late summer. Thanks for the offer, and let me know when you have an idea of the cost.

 

Tannji