VPC Idle setting.

[1LE]

Where's yours at? "Conventional Wisdom" seems to be full lean is the way to go on pretty much any setup. I followed that to begin with and the car started kind of rough. Now that it's getting cold out, it was getting near impossible to start. Adding a couple clicks of fuel helped bigtime. So, where's yours set at and how's it work? (basic mods list might be good too).

I've got:
6-bolt 2g, 9:1, HKS 264/264, 550's with 550 chip on VPC (not sure if it's regular or lean though).

 

[UndergroundR32]

It's all relative to your setup. I don't recall the correct compensation for 550's, but i'm sure it's somewhere around -15%, which will vary from car to car. The idle function on your VPC makes approximately 2% correction for every click clockwise or counter-clockwise. Just watch your 02 trim and your low fuel trim as you play with it. Zero out your VPC and AFC. Then go as lean as possible with the idle switch on your VPC. Wait a couple minutes and then look at your o2 and fuel trim. Compensate further based upon these.