G body ls1 swap questions
04-14-2016, 12:49 PM
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G body ls1 swap questions I need help I'm wanting to do an ls1 and t56 swap in a 85 Monte I just need a list of what to do basically. The wiring has gotten me confused I want a clean wiring set up and budget is not a problem right now just need some help any info could help.
04-14-2016, 01:08 PM
#2
If you get the harness with the LS1 they are pretty easy to strip down into a stand alone harness. http://lt1swap.com/ has all the pinout information you will need.
If your worried about doing the harness yourself then there are several vendors that will modify a harness or make a new stand alone harness for you. Here are a few vendors you can contact about the engine harness.
http://www.bp-automotive.com/
http://www.speartech.com/
https://www.psiconversion.com/
Your PCM will need to have the vats tuned out of it as well for a stand alone system.
If your worried about doing the harness yourself then there are several vendors that will modify a harness or make a new stand alone harness for you. Here are a few vendors you can contact about the engine harness.
http://www.bp-automotive.com/
http://www.speartech.com/
https://www.psiconversion.com/
Your PCM will need to have the vats tuned out of it as well for a stand alone system.
04-14-2016, 01:19 PM
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Okay thank you another thing is how would I tie the ls1harness into my stock gauges and all that stuff in the interior because I noticed when I took all the inside wiring out the computer had wires going up into the dash
04-14-2016, 07:35 PM
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You'd need to keep your stock sensor wiring and sensors and adapt them to fit the new engine. You'll need a converter box to run the mechanical speedo and I'm not sure of the stock tach will work.
04-15-2016, 08:37 AM
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Gauge wires run from the driver's side bulkhead. Stock computer stuff came out the passenger side of the firewall.
I should clarify my last statement a bit: if you are running a new trans like 4l60e you'll need the converter box for the speedo. If you are using a th400, 200r4 or other trans with a speedo cable drive, then the stock speedo will work.
I should clarify my last statement a bit: if you are running a new trans like 4l60e you'll need the converter box for the speedo. If you are using a th400, 200r4 or other trans with a speedo cable drive, then the stock speedo will work.