[ud03803]

OK, for anyone that needs to install the NOS mini 2 Stage progressive controller into their 6th gen let me clarify some of the instructions from Holley. Hopefully, this helps someone in the future trying to install nitrous kit 05166NOS from Holley onto a 6th gen Camaro (or possibly a vette or anything else with the gen V LT1)

TPS - Holley's instructions are vague, at best - even their pictures! The TPS signal can be found at the gas pedal. Holley has the correct wire color here (green/black), just note you have to remove the gas pedal, then you'll have access to the wire. It requires 1 bolt to remove the pedal then the bottom rotates up and back. Install is reverse. You can use their posi-tap on this wire. When you go through the mini controller configuration steps, pay special attention to the step 9 TPS calibration. After entering step 9, you then click button #2 to enter edit mode. With engine off and ignition on, you can then press the gas pedal 100% and you should see the controller respond with a reading of 2.1 - meaning 2.1 volts. It defaults to 4.0 volts and this definitely will not work! The instructions do say to do this, just read it carefully. One more note, the hole in the firewall that acts as the sound tube entry into the cabin, is a few inches above the gas pedal. This makes a great pre-made hole for running the nitrous line and all wiring. Just be sure to properly shield everything with rubber or silicon. I used the later and it worked great.

Tach Signal - Here is where Holley has seriously screwed the pooch for 6th Gens. I have included their instructions verbatim below as well as a picture of what you'll see on your #2 coil. Let's see if they jive...

Holley
15. Using a supplied Posi-Tap connector (see assembly diagram below), connect the green tach signal wire from the 2-stage mini progressive controller to the #2 coil driver signal wire (Blue/Violet Wire). This will be one of the wires on the 2 wire connector located on the ignition coil.

Now, let's look at an actual image from my 2018 Camaro SS coil pack #2.
(SEE BELOW)

Anyone see the glaring inconsistency here? Thanks Holley, but our coil packs have 4 wires, not 2! Also - looking at their instructions, they want you to tap the "(Blue/Violet Wire)". You can see where I tried that, with no luck. No tach signal at all. Then a friend of mine called and said he and a buddy did his and he found the same issue and started trying the other wires. See the Blue wire next to the Blue/Violet? It might be Blue/Green stripe I think, maybe white, second wire anyway. THAT's your tach signal wire there! Now you should be able to crank your car with the 2-button NOS controller interface plugged in, when it says "r r", you can press the #2 button and it will show your current RPM. If it does, you're good to go. I tried to put a lot of key words into this so it's searchable by others in the future. Good luck all!