The Sniper system has the ability to increase RPM when the air conditioning is running so that it does struggle at idle. This will be a considerable improvement over the former system I was using.
What I had in place was a Holley 46-74 solenoid that was quite expensive ($134). The solenoid was arranged to push on the throttle linkage at the carb when the AC was running. However, it was not strong enough to move the throttle linkage if it was presently closed. It was only strong enough to hold it farther open if it were activated and the throttle was returning closed. It was hard to align and seemed to have varied results on the RPM, required a relay and wiring, and just wasn't a great solution for me.
The old wiring configuration required a relay. The compressor provided a 12v output but it wasn't strong enough to operate the solenoid. I wired in a relay as shown below to use an adequate 12v power supply from a white wire run from inside the cabin to the former location of the voltage regulator.
This is wired using the orange wire (Input #1) on the 10 pin optional I/O harness. When there is a ground input to this wire from the compressor, it will increase RPM based on your settings in the Sniper system (under Tuning -> Advanced -> Advanced Idle -> IAC Kick).
I rewired the relay to provide a negative trigger for the Sniper system so that it would know when the system is running rather than the former setup which provided power to the solenoid. I also changed the trigger wire color to orange so it matches the Sniper system. I don't intend to leave this as it is for the long term but this was a quick fix to change the wiring, mount the relay back where it was, and have it functional despite it being the middle of winter.
This is the new wiring for the relay.
This is a picture of it during the wiring process.
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