LS3 with Autometer Guages

[Swain]

I want to run the Carbon Fiber Series in my 68 Camaro with a LS3 with PSI Coversion Harness. What will I need to run the Tach and speedo? Any tricks out there? T56 trans

[Ron in SoCal]

Hey Jay - here's what I ran into:

https://lateral-g.net/forums/show...postcount=2180

Make sure you set the tach for four cyl operation and add the resistor and ground and you should be good to go.

[Swain]

Cool I will check it out.

Thanks for the Help Ron...

[jwcarguy]

Your PSI harness should have a speedo and tach output wires that is from your pcm

you can choose to run the speedo off the pcm leads (cleaner, less wires to route)or direct off your T56 speed sensor, just pay close attention, which "lead wire" that is required per the Autometer install instructions
If you choose direct off trans, you can "group" them in the same loom with your reverse lockout solenoid & backup light switch leads

Ron is correct also in setting your Autometer tach (switch through rear access hole) to " 4cyl"
The pcm reads off one side coil bank (4 coils)

Hope this helps, Jeff

[Swain]

Thanks for the help guys.